Ch\u1ec9 s\u1ed1 \u1ed1c-tan l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng cho kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00edch n\u1ed5 c\u1ee7a x\u0103ng. \u0110\u1ed9ng c\u01a1 c\u00f3 t\u1ef7 s\u1ed1 n\u00e9n l\u1edbn \u0111\u00f2i h\u1ecfi x\u0103ng c\u00f3 ch\u1ec9 s\u1ed1 \u1ed1c-tan l\u1edbn. D\u00f3 \u0111\u00f3 h\u00e3y tham kh\u1ea3o khuy\u1ebfn c\u00e1o ghi trong s\u1ed5 tay h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng xe \u0111\u1ec3 bi\u1ebft lo\u1ea1i x\u0103ng ph\u00f9 h\u1ee3p cho x\u1ebf y\u00eau. Ngo\u00e0i ra Bu-gi \u0111\u00e1nh l\u1eeda s\u1edbm c\u0169ng d\u1ec5 ph\u00e1t sinh k\u00edch n\u1ed5. L\u1ed7i t\u1eeb h\u1ec7 th\u1ed1ng \u0111\u00e1nh l\u1eeda ph\u1ea7n l\u1edbn xu\u1ea5t hi\u1ec7n \u1edf nh\u1eefng xe \u0111\u1eddi c\u0169 do \u0111\u1eb7t sai g\u00f3c \u0111\u00e1nh l\u1eeda. Nh\u1eefng d\u00f2ng xe hi\u1ec7n \u0111\u1ea1i s\u1eed d\u1ee5ng h\u1ec7 \u0111\u00e1nh l\u1eeda \u0111i\u1ec7n t\u1eed, l\u1ed7i c\u00f3 th\u1ec3 do th\u00f4ng tin sai l\u1ec7ch t\u1eeb c\u1ea3m bi\u1ebfn t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o. M\u1ed9t nguy\u00ean nh\u00e2n kh\u00e1c, trong bu\u1ed3ng \u0111\u1ed1t c\u00f3 ch\u1ee9a nhi\u1ec1u mu\u1ed9i carbon n\u00f3ng t\u1ea1o l\u00ean m\u1ed3i ch\u00e2m ch\u00e1y h\u00f2a kh\u00ed.<\/p>\n
Hi\u1ec7n t\u01b0\u1ee3ng k\u00edch n\u1ed5 b\u1eaft ngu\u1ed3n t\u1eeb vi\u1ec7c s\u1eed d\u1ee5ng nhi\u00ean li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00edch n\u1ed5 qu\u00e1 th\u1ea5p, khi\u1ebfn cho h\u1ed7n h\u1ee3p kh\u00ed \u2013 nhi\u00ean li\u1ec7u kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ed1t ch\u00e1y m\u1ed9t c\u00e1ch \u0111i\u1ec1u ho\u00e0 \u0111\u1ec3 t\u1ea1o ra ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a. \u0110\u1ec3 kh\u1eafc ph\u1ee5c hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, c\u1ea7n ph\u1ea3i ch\u1ebf t\u1ea1o x\u0103ng d\u00f9ng cho \u0111\u1ed9ng c\u01a1 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00edch n\u1ed5 t\u1ed1t. Hi\u1ec7n t\u01b0\u1ee3ng K\u00edch n\u1ed5 v\u00e0 Tr\u1ecb s\u1ed1 Oc-tan l\u00e0 hai kh\u00e1i ni\u1ec7m lu\u00f4n \u0111\u01b0\u1ee3c song song \u0111\u1ec1 c\u1eadp. Ch\u00fang ta h\u00e3y \u0111i s\u00e2u t\u00ecm hi\u1ec3u hai v\u1ea5n \u0111\u1ec1 n\u00e0y.<\/p>\n
K\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c t\u1eeb\u00a0nh\u1eefng nghi\u00ean c\u1ee9u\u00a0c\u1ee7a Thomas Midgley (1889-1944) v\u00e0 Sir Harry Ricardo (1885-1974) \u0111\u00e3 ch\u1ee9ng minh \u0111i\u1ec1u \u0111\u00f3. \u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a t\u1eeb x\u0103ng, h\u1ed7n h\u1ee3p kh\u00ed n\u00e9n nhi\u00ean li\u1ec7u \u2013 kh\u00f4ng kh\u00ed trong bu\u1ed3ng \u0111\u1ed1t c\u1ea7n ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ed1t ch\u00e1y m\u1ed9t c\u00e1ch \u0111i\u1ec1u ho\u00e0. B\u1eaft \u0111\u1ea7u t\u1eeb khi bugi \u0111\u00e1nh l\u1eeda, b\u1ec1 m\u1eb7t ng\u1ecdn l\u1eeda lan to\u1ea3 m\u1ed9t c\u00e1ch \u0111\u1ed3ng \u0111\u1ec1u trong xi-lanh v\u1edbi t\u1ed1c \u0111\u1ed9 kho\u1ea3ng 20-25 m\/s v\u00e0 \u0111\u1ed1t ch\u00e1y h\u1ebft ho\u00e0 kh\u00ed nhi\u00ean li\u1ec7u \u2013 kh\u00f4ng kh\u00ed \u1edf nh\u1eefng v\u00f9ng m\u00e0 n\u00f3 \u0111i qua.<\/p>\n
![\"\"](\"http:\/\/ceramicmachine.vn\/wp-content\/uploads\/2017\/09\/knocking1.jpg\")
<\/p>\n
Qu\u00e1 tr\u00ecnh ch\u00e1y \u0111i\u1ec1u ho\u00e0 sinh ra c\u00e1c b\u1ee9c x\u1ea1 quang nhi\u1ec7t \u0111\u1ed1t n\u00f3ng v\u00f9ng kh\u00ed ch\u01b0a ch\u00e1y ph\u00eda tr\u01b0\u1edbc v\u00e0 n\u1ebfu nhi\u00ean li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00edch n\u1ed5 t\u1ed1t, h\u1ed7n h\u1ee3p nhi\u00ean li\u1ec7u \u2013 kh\u00f4ng kh\u00ed \u1edf v\u00f9ng n\u00e0y s\u1ebd kh\u00f4ng b\u1ecb ch\u00e1y tr\u01b0\u1edbc khi b\u1ec1 m\u1eb7t l\u1eeda lan t\u1edbi, ch\u00fang s\u1ebd ch\u00e1y m\u1ed9t c\u00e1ch tu\u1ea7n t\u1ef1 cho \u0111\u1ebfn khi to\u00e0n b\u1ed9 kh\u00ed trong xi-lanh ch\u00e1y h\u1ebft, b\u1eb1ng c\u00e1ch \u0111\u00f3, nhi\u00ean li\u1ec7u s\u1ebd cung c\u1ea5p m\u1ed9t l\u1ef1c \u0111\u1ea9y c\u00f3 n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a l\u00ean piston.<\/p>\n
Trong th\u1ef1c t\u1ebf, c\u00f3 h\u00e0ng lo\u1ea1t c\u00e1c ph\u1ea3n \u1ee9ng ti\u1ec1n k\u00edch n\u1ed5 di\u1ec5n ra \u1edf v\u00f9ng kh\u00ed ch\u01b0a ch\u00e1y trong bu\u1ed3ng \u0111\u1ed1t tr\u01b0\u1edbc khi b\u1ec1 m\u1eb7t l\u1eeda t\u1eeb bugi \u1eadp \u0111\u1ebfn. C\u00e1c ph\u1ea3n \u1ee9ng ti\u1ec1n ch\u00e1y n\u1ed5 \u0111\u00f3 t\u1ea1o ra c\u00e1c ph\u00e2n t\u1eed hay c\u00e1c g\u1ed1c ho\u00e1 h\u1ecdc c\u00f3 kh\u1ea3 n\u0103ng t\u1ef1 b\u1ed1c ch\u00e1y b\u1edfi c\u00e1c b\u1ee9c x\u1ea1 quang nhi\u1ec7t v\u1edbi t\u1ed1c \u0111\u1ed9 ch\u00e1y \u0111\u1ea1t kho\u1ea3ng 1.500-2.500 m\/s, nhanh g\u1ea5p h\u00e0ng tr\u0103m l\u1ea7n t\u1ed1c \u0111\u1ed9 ch\u00e1y b\u00ecnh th\u01b0\u1eddng.<\/p>\n
V\u1edbi t\u1ed1c \u0111\u1ed9 ch\u00e1y nh\u01b0 v\u1eady ch\u00fang s\u1ebd g\u00e2y ra s\u1ef1 t\u0103ng \u0111\u1ed9t ng\u1ed9t \u00e1p su\u1ea5t trong xi-lanh, gi\u00e1 tr\u1ecb \u00e1p su\u1ea5t t\u1ee9c th\u1eddi t\u1ea1i th\u1eddi \u0111i\u1ec3m x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng k\u00edch n\u1ed5 m\u00e0 m\u00e1y ghi \u00e1p l\u1ef1c ghi \u0111\u01b0\u1ee3c l\u00e0 160 atm, g\u1ea5p nhi\u1ec1u l\u1ea7n so v\u1edbi \u00e1p su\u1ea5t v\u1eadn h\u00e0nh \u1edf ch\u1ebf \u0111\u1ed9 ch\u00e1y b\u00ecnh th\u01b0\u1eddng. Tuy nhi\u00ean, \u00e1p su\u1ea5t t\u1ed5ng h\u1ee3p t\u1ed1i \u0111a t\u00e1c \u0111\u1ed9ng l\u00ean b\u1ec1 m\u1eb7t piston l\u1ea1i kh\u00f4ng kh\u00e1c m\u1ea5y so v\u1edbi \u00e1p su\u1ea5t v\u1eadn h\u00e0nh b\u00ecnh th\u01b0\u1eddng. Nguy\u00ean nh\u00e2n l\u00e0 do s\u1ef1 b\u00f9 tr\u1eeb \u00e1p su\u1ea5t c\u1ee7a hai kh\u1ed1i kh\u00ed ng\u01b0\u1ee3c chi\u1ec1u nhau: M\u1ed9t sinh ra t\u1eeb b\u1ec1 m\u1eb7t l\u1eeda lan truy\u1ec1n t\u1eeb bugi v\u00e0 m\u1ed9t sinh ra t\u1eeb c\u00e1c \u0111i\u1ec3m t\u1ef1 k\u00edch n\u1ed5.<\/p>\n
![\"\"](\"http:\/\/ceramicmachine.vn\/wp-content\/uploads\/2017\/09\/knocking.jpg\")
<\/p>\n
Hi\u1ec7n t\u01b0\u1ee3ng k\u00edch n\u1ed5 l\u00e0m ti\u00eau hao n\u0103ng l\u01b0\u1ee3ng, gi\u1ea3m s\u1ee9c m\u1ea1nh c\u1ee7a \u0111\u1ed9ng c\u01a1 do n\u0103ng l\u01b0\u1ee3ng nhi\u1ec7t thu \u0111\u01b0\u1ee3c kh\u00f4ng d\u00f9ng \u0111\u1ec3 sinh c\u00f4ng h\u1eefu \u00edch, \u00e1p su\u1ea5t sinh ra t\u1eeb c\u00e1c \u0111i\u1ec3m t\u1ef1 ch\u00e1y ch\u1ee7 y\u1ebfu t\u1ea1o ra c\u00e1c s\u00f3ng h\u01a1i xung \u0111\u1ed9ng va \u0111\u1eadp v\u00e0o th\u00e0nh xi-lanh, m\u00e1y n\u1ed5 rung gi\u1eadt v\u00e0 l\u00e0m n\u00f3ng \u0111\u1ed9ng c\u01a1 m\u1ed9t c\u00e1ch b\u1ea5t th\u01b0\u1eddng, \u0111\u1ed3ng th\u1eddi, s\u00f3ng n\u00e9n sinh ra t\u1eeb c\u00e1c v\u1ecb tr\u00ed k\u00edch n\u1ed5 c\u1ed9ng h\u01b0\u1edfng v\u1edbi s\u00f3ng n\u00e9n ch\u00ednh t\u1ea1o ra n\u00fat giao thoa v\u00e0 ph\u00e1t ra nh\u1eefng ti\u1ebfng k\u00eau \u201cl\u1ed1c c\u1ed1c\u201d.<\/p>\n
Ng\u01b0\u1eddi s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ti\u1ec7n giao th\u00f4ng ng\u00e0y nay c\u00f3 th\u1ec3 kh\u00f4ng quan t\u00e2m nhi\u1ec1u \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y. Nh\u01b0ng c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n \u0111\u1ed9ng c\u01a1 l\u1ed7i l\u1ea1c \u1edf \u0111\u1ea7u th\u1eadp ni\u00ean 20 c\u1ee7a th\u1ebf k\u1ef7 tr\u01b0\u1edbc \u0111\u00e3 kh\u00f4ng th\u1ec3 tin n\u1ed5i khi ch\u1ee9ng ki\u1ebfn c\u1ea3nh ch\u1ec9 trong v\u00e0i ph\u00fat, piston, ch\u1ed1t piston r\u1ea1n n\u1ee9t, v\u00f2ng g\u0103ng (s\u00e9c-m\u0103ng) v\u1ee1 th\u00e0nh t\u1eebng m\u1ea3nh, b\u1ed9 truy\u1ec1n \u0111\u1ed9ng, h\u1ed9p s\u1ed1, tr\u1ee5c cam b\u1ecb m\u00e0i m\u00f2n, v\u00e0 cu\u1ed1i c\u00f9ng to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng \u0111\u1ed9ng c\u01a1 b\u1ecb ph\u00e1 hu\u1ef7 b\u1edfi s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa s\u00f3ng \u00e1p su\u1ea5t m\u1ea1nh v\u1edbi hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 nhi\u1ec7t.<\/p>\n
C\u00e1c h\u00e3ng xe th\u01b0\u1eddng xuy\u00ean n\u00e2ng c\u1ea5p c\u1ea5u t\u1ea1o c\u1ee7a \u0111\u1ed9ng c\u01a1 b\u1eb1ng c\u00e1ch t\u00edch h\u1ee3p th\u00eam nhi\u1ec1u t\u00ednh n\u0103ng m\u1edbi nh\u01b0 h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh trong, h\u1ec7 th\u1ed1ng \u0111\u00e1nh l\u1eeda t\u1ef1 \u0111\u1ed9ng, v\u00e0 \u0111i\u1ec1u quan tr\u1ecdng h\u01a1n, lu\u00f4n tin t\u01b0\u1edfng r\u1eb1ng s\u1ee9c m\u1ea1nh c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111\u1ed1t trong c\u00f3 th\u1ec3 t\u0103ng l\u00ean m\u1ed9t c\u00e1ch tu\u1ef3 \u00fd, v\u00ec theo l\u00fd thuy\u1ebft nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc, v\u1edbi t\u1ef7 s\u1ed1 n\u00e9n c\u00e0ng cao, hi\u1ec7u su\u1ea5t nhi\u1ec7t c\u00e0ng g\u1ea7n \u0111\u1ebfn c\u1ef1c \u0111\u1ea1i.<\/p>\n
C\u00e1c h\u00e3ng xe, nh\u1eefng nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u1ed9ng c\u01a1 cu\u1ed1i c\u00f9ng ph\u1ea3i th\u1eeba nh\u1eadn r\u1eb1ng, h\u1ecd \u0111\u00e3 qu\u00ean kh\u00f4ng nghi\u00ean c\u1ee9u, kh\u00f4ng ph\u00e1t tri\u1ec3n m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111\u1ed1t trong: nhi\u00ean li\u1ec7u. Nhi\u00ean li\u1ec7u d\u00f9ng cho \u0111\u1ed9ng c\u01a1 \u0111\u1ed1t trong t\u1ed3n t\u1ea1i m\u1ed9t t\u00ednh ch\u1ea5t \u0111\u1eb7c bi\u1ec7t: n\u00f3 s\u1ebd t\u1ef1 ch\u00e1y, t\u1ef1 k\u00edch n\u1ed5 khi b\u1ecb n\u00e9n trong xi-lanh d\u01b0\u1edbi \u00e1p su\u1ea5t cao, tr\u01b0\u1edbc c\u1ea3 khi bugi \u0111\u00e1nh l\u1eeda.<\/p>\n
T\u1eeb k\u1ebft qu\u1ea3 c\u1ee7a nh\u1eefng nh\u00e0 nghi\u00ean c\u1ee9u \u0111i tr\u01b0\u1edbc, n\u0103m 1927, Graham Edgar, m\u1ed9t nh\u00e2n vi\u00ean tr\u1ebb c\u1ee7a h\u00e3ng Ethyl Corporation t\u1ea1i M\u1ef9, \u0111\u01b0a ra \u0111\u1ec1 ngh\u1ecb s\u1eed d\u1ee5ng 2 hydrocacbon \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 k\u00edch n\u1ed5 cho nhi\u00ean li\u1ec7u:\u00a0nano-heptan\u00a0<\/strong>v\u00e0\u00a02,4,4-trimetylpentan, hay c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi m\u1ed9t c\u00e1ch kh\u00f4ng ch\u00ednh x\u00e1c l\u00e0\u00a0iso-octan<\/strong>.<\/p>\n Iso-octan c\u00f3 ch\u1ec9 s\u1ed1 ch\u1ed1ng k\u00edch n\u1ed5 cao, c\u00f2n nano-heptan c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00edch n\u1ed5 r\u1ea5t k\u00e9m v\u00e0 Edgar \u0111\u00e3 \u0111\u1ec1 ngh\u1ecb s\u1eed d\u1ee5ng t\u1ef7 s\u1ed1 c\u1ee7a hai ch\u1ea5t n\u00e0y \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00edch n\u1ed5 c\u1ee7a nhi\u00ean li\u1ec7u s\u1eed d\u1ee5ng trong c\u00e1c \u0111\u1ed9ng c\u01a1 \u0111\u1ed1t trong. \u00d4ng c\u0169ng \u0111\u00e3 ch\u1ee9ng minh r\u1eb1ng, tr\u1ecb s\u1ed1 ch\u1ed1ng k\u00edch n\u1ed5 c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i x\u0103ng th\u01b0\u01a1ng m\u1ea1i ng\u00e0y \u0111\u00f3 \u0111\u1ec1u c\u00f3 th\u1ec3 quy v\u1ec1 t\u1ef7 s\u1ed1 th\u1ec3 t\u00edch n-heptan: octan n\u1eb1m trong kho\u1ea3ng 60:40 \u0111\u1ebfn 40:60. Nh\u01b0 v\u1eady, n\u1ebfu ch\u00fang ta ra qu\u1ea7y x\u0103ng v\u00e0o nh\u1eefng n\u0103m 30 c\u1ee7a th\u1ebf k\u1ef7 tr\u01b0\u1edbc, ch\u00fang ta ch\u1ec9 c\u00f3 th\u1ec3 mua \u0111\u01b0\u1ee3c c\u00e1c lo\u1ea1i x\u0103ng t\u1eeb A40 \u0111\u1ebfn A60 m\u00e0 th\u00f4i.<\/p>\n L\u00fd do mang t\u00ednh k\u1ef9 thu\u1eadt m\u00e0 Edgar \u0111\u01b0a ra khi d\u00f9ng hai ch\u1ea5t n\u00e0y l\u00e0 ch\u00fang c\u00f3 nh\u1eefng t\u00ednh ch\u1ea5t v\u1eadt l\u00fd r\u1ea5t g\u1ea7n nhau nh\u01b0 t\u00ednh ch\u1ea5t bay h\u01a1i v\u00e0 \u0111\u1eb7c bi\u1ec7t l\u00e0 nhi\u1ec7t \u0111\u1ed9 s\u00f4i, ch\u00ednh v\u00ec v\u1eady, khi ta thay \u0111\u1ed5i t\u1ef7 s\u1ed1 \u201cheptan: iso-octan\u201d t\u1eeb 100:0 \u0111\u1ebfn 0:100 th\u00ec h\u1ea7u nh\u01b0 c\u00e1c th\u00f4ng s\u1ed1 tr\u00ean thay \u0111\u1ed5i kh\u00f4ng \u0111\u00e1ng k\u1ec3. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m, v\u00ec kh\u1ea3 n\u0103ng bay h\u01a1i c\u1ee7a nhi\u00ean li\u1ec7u \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u1ed9ng c\u01a1.<\/p>\n Edgar \u0111\u00e3 thu \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u th\u00f4ng s\u1ed1 t\u1eeb th\u1eed nghi\u1ec7m n\u00e0y, tuy nhi\u00ean, hi\u1ec7n nay, ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u1eabn l\u00e0 hai th\u00f4ng s\u1ed1 RON (Research Octane Number-ch\u1ec9 s\u1ed1 octan nghi\u00ean c\u1ee9u) v\u00e0 MON (Motor Octane Number-ch\u1ec9 s\u1ed1 octan \u0111\u1ed9ng c\u01a1).<\/p>\n L\u1ef1a ch\u1ecdn ch\u1ec9 s\u1ed1 Octan ph\u00f9 h\u1ee3p<\/strong><\/p>\n Ch\u1ec9 s\u1ed1 Octan l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng quy\u1ebft \u0111\u1ecbnh qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh c\u1ee7a \u0111\u1ed9ng c\u01a1. L\u1ef1a ch\u1ecdn gi\u00e1 tr\u1ecb Octan \u0111\u1ec3 \u0111\u1ed9ng c\u01a1 \u201cch\u1ea1y\u201d m\u1ed9t c\u00e1ch \u00eam \u1ea3, kho\u1ebb kho\u1eafn v\u00e0 tr\u01b0\u1eddng k\u1ef3 l\u00e0 y\u00eau c\u1ea7u h\u00e0ng \u0111\u1ea7u \u0111\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi s\u1edf h\u1eefu xe.<\/p>\n Ch\u1ec9 s\u1ed1 Octan n\u1eb1m ngo\u00e0i danh m\u1ee5c b\u1ea3o h\u00e0nh c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 vi\u1ec7c \u0111\u00e1p \u1ee9ng nh\u1eefng y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt c\u1ee7a nhi\u00ean li\u1ec7u ho\u00e0n to\u00e0n ph\u1ee5 thu\u1ed9c v\u00e0o ng\u01b0\u1eddi s\u1eed d\u1ee5ng. \u0110\u1ea7u ti\u00ean, \u0111\u1ec3 l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c lo\u1ea1i x\u0103ng ph\u00f9 h\u1ee3p, b\u1ea1n c\u1ea7n ph\u1ea3i bi\u1ebft ki\u1ec3u \u0111\u1ed9ng c\u01a1 m\u00e0 b\u1ea1n \u0111ang s\u1eed d\u1ee5ng. Th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam hi\u1ec7n c\u00f3 r\u1ea5t nhi\u1ec1u h\u00e3ng xe h\u01a1i v\u00e0 xe g\u1eafn m\u00e1y, m\u1ed7i h\u00e3ng xe \u0111\u1ec1u c\u00f3 nh\u1eefng c\u1ea3i ti\u1ebfn, thi\u1ebft k\u1ebf ri\u00eang cho \u0111\u1ed9ng c\u01a1 c\u1ee7a m\u00ecnh. C\u00f3 th\u1ec3 ph\u00e2n th\u00e0nh hai nh\u00f3m ch\u00ednh: \u0111\u01b0\u1ee3c v\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c trang b\u1ecb h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00e0nh t\u1ef1 \u0111\u1ed9ng.<\/p>\n C\u00e1c lo\u1ea1i xe kh\u00f4ng \u0111\u01b0\u1ee3c trang b\u1ecb h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00e0nh t\u1ef1 \u0111\u1ed9ng th\u01b0\u1eddng l\u00e0 xe g\u1eafn m\u00e1y v\u00e0 \u00f4t\u00f4 \u0111\u1eddi c\u0169, ch\u00fang c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m chung l\u00e0 v\u1eabn d\u00f9ng b\u1ed9 ch\u1ebf ho\u00e0 kh\u00ed \u0111\u1ec3 t\u1ea1o ra h\u1ed7n h\u1ee3p x\u0103ng gi\u00f3.<\/p>\n Trong khi \u0111\u00f3, h\u1ea7u h\u1ebft c\u00e1c h\u00e3ng xe h\u01a1i c\u00f3 m\u1eb7t \u1edf Vi\u1ec7t Nam hi\u1ec7n nay \u0111\u1ec1u trang b\u1ecb h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00e0nh t\u1ef1 \u0111\u1ed9ng cho c\u00e1c s\u1ea3n ph\u1ea9m c\u1ee7a m\u00ecnh. Tr\u00ean c\u00e1c d\u00f2ng xe n\u00e0y kh\u00f4ng g\u1eafn b\u1ed9 ch\u1ebf ho\u00e0 kh\u00ed m\u00e0 nhi\u00ean li\u1ec7u \u0111\u01b0\u1ee3c b\u01a1m th\u1eb3ng v\u00e0o xi-lanh th\u00f4ng qua thi\u1ebft b\u1ecb b\u01a1m nhi\u00ean li\u1ec7u t\u1ef1 \u0111\u1ed9ng (EFI \u2013 Electronic Fuel Injection).<\/p>\n \u0110\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i xe kh\u00f4ng trang b\u1ecb h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00e0nh t\u1ef1 \u0111\u1ed9ng, vi\u1ec7c l\u1ef1a ch\u1ecdn ch\u1ec9 s\u1ed1 Octan s\u1ebd kh\u00f3 kh\u0103n h\u01a1n v\u00ec \u0111\u1ed9ng c\u01a1 kh\u00f4ng th\u1ec3 t\u1ef1 \u0111i\u1ec1u ch\u1ec9nh v\u1ec1 \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh t\u1ed1i \u01b0u. H\u01a1n n\u1eefa, hi\u1ec7n t\u01b0\u1ee3ng k\u00edch n\u1ed5 ph\u00e1 hu\u1ef7 \u0111\u1ed9ng c\u01a1 r\u1ea5t nhanh n\u00ean ng\u01b0\u1eddi s\u1eed d\u1ee5ng c\u00e1c lo\u1ea1i xe n\u00e0y ph\u1ea3i d\u00f9ng lo\u1ea1i nhi\u00ean li\u1ec7u ch\u1eafc ch\u1eafn kh\u00f4ng g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng k\u00edch n\u1ed5, d\u01b0\u1edbi nh\u1eefng \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh m\u00e0 h\u1ecd th\u01b0\u1eddng xuy\u00ean g\u1eb7p ph\u1ea3i.<\/p>\n Sau khi th\u1eed nghi\u1ec7m v\u1edbi nhi\u1ec1u d\u1ea1ng \u0111\u1ed9ng c\u01a1 v\u00e0 nhi\u1ec1u lo\u1ea1i x\u0103ng c\u00f3 ch\u1ec9 s\u1ed1 Octan kh\u00e1c nhau, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 \u0111\u01b0a ra k\u1ebft lu\u1eadn l\u1ef1a ch\u1ecdn ch\u1ec9 s\u1ed1 Octan d\u1ef1a tr\u00ean t\u1ef7 s\u1ed1 n\u00e9n c\u1ee7a m\u1ed7i lo\u1ea1i \u0111\u1ed9ng c\u01a1. S\u1ef1 t\u01b0\u01a1ng quan gi\u1eefa t\u1ef7 s\u1ed1 n\u00e9n v\u1edbi ch\u1ec9 s\u1ed1 Octan t\u1ed1i \u01b0u v\u00e0 tu\u00e2n theo quy lu\u1eadt nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc, t\u0103ng t\u1ef7 s\u1ed1 n\u00e9n \u0111\u1ed3ng th\u1eddi c\u0169ng k\u00e9o theo s\u1ef1 t\u0103ng ch\u1ec9 s\u1ed1 Octan v\u00e0 hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9ng.<\/p>\n Hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc t\u0103ng l\u00ean v\u00e0 \u0111\u1ea1t c\u1ef1c \u0111\u1ea1i khi \u0111\u1ed9ng c\u01a1 \u1edf tr\u1ea1ng th\u00e1i ch\u1edbm xu\u1ea5t hi\u1ec7n hi\u1ec7n t\u01b0\u1ee3ng k\u00edch n\u1ed5. \u0110\u1ed9ng c\u01a1 c\u00f3 t\u1ef7 s\u1ed1 n\u00e9n th\u1ea5p l\u00e0m cho hi\u1ec7u su\u1ea5t l\u00e0m vi\u1ec7c c\u0169ng gi\u1ea3m \u0111i \u01b0\u01a1ng \u1ee9ng. Quan h\u1ec7 gi\u1eefa t\u1ef7 s\u1ed1 n\u00e9n v\u00e0 ch\u1ec9 s\u1ed1 Octan nh\u01b0 sau:<\/p>\n V\u1edbi hai lo\u1ea1i x\u0103ng b\u00e1n tr\u00ean th\u1ecb tr\u01b0\u1eddng hi\u1ec7n nay l\u00e0 Mogas 90 v\u00e0 Mogas 92, c\u00e1c xe g\u1eafn m\u00e1y c\u00f3 t\u1ef7 s\u1ed1 n\u00e9n t\u1eeb 7:1 \u0111\u1ebfn 8:1 \u0111\u1ec1u c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng m\u1ed9t c\u00e1c tr\u01a1n tru n\u1ebfu \u0111\u1ea3m b\u1ea3o \u0111\u01b0\u1ee3c c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt kh\u00e1c nh\u01b0: t\u00ecnh tr\u1ea1ng s\u1ea1ch s\u1ebd c\u1ee7a \u0111\u1ed9ng c\u01a1, v\u1ecb tr\u00ed ch\u1ed1t l\u1eeda v\u00e0 th\u00f4ng s\u1ed1 qu\u00e1n t\u00ednh v\u1eadn h\u00e0nh \u201cRun-on\u201d (\u201cRun-on\u201d l\u00e0 thu\u1eadt ng\u1eef d\u00f9ng \u0111\u1ec3 ch\u1ec9 xu h\u01b0\u1edbng ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u1ed9ng c\u01a1 khi ng\u1eaft ngu\u1ed3n \u0111i\u1ec7n bugi, n\u1ebfu qu\u00e1n t\u00ednh n\u00e0y c\u00e0ng l\u1edbn, \u0111\u1ed9ng c\u01a1 c\u00e0ng d\u1ec5 b\u1ecb k\u00edch n\u1ed5).<\/p>\n D\u00f2ng xe cao c\u1ea5p c\u1ee7a c\u00e1c h\u00e3ng xe h\u01a1i danh ti\u1ebfng nh\u01b0 Mercedes-Benz, GM Daewoo, Lexus, BMW \u0111ang ho\u1ea1t \u0111\u1ed9ng \u1edf Vi\u1ec7t Nam, \u0111\u1ed9ng c\u01a1 \u0111\u01b0\u1ee3c trang b\u1ecb h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00e0nh t\u1ef1 \u0111\u1ed9ng g\u1ed3m hai h\u1ec7 th\u1ed1ng th\u1ee9 c\u1ea5p: H\u1ec7 th\u1ed1ng ki\u1ec3m so\u00e1t l\u01b0u l\u01b0\u1ee3ng d\u00f2ng kh\u00f4ng kh\u00ed, l\u01b0u l\u01b0\u1ee3ng d\u00f2ng nhi\u00ean li\u1ec7u, th\u1eddi gian \u0111\u00e1nh l\u1eeda bugi; v\u00e0 h\u1ec7 th\u1ed1ng c\u1ea3m bi\u1ebfn c\u00e1c th\u00f4ng s\u1ed1 n\u1ed3ng \u0111\u1ed9 oxy trong kh\u00ed th\u1ea3i, m\u1ee9c \u0111\u1ed9 k\u00edch n\u1ed5, nhi\u1ec7t \u0111\u1ed9 kh\u00ed th\u1ea3i, nhi\u1ec7t \u0111\u1ed9 ch\u1ea5t l\u00e0m m\u00e1t v\u00e0 nhi\u1ec7t \u0111\u1ed9 van n\u1ea1p.<\/p>\n Trong tr\u01b0\u1eddng h\u1ee3p b\u1ea1n s\u1eed d\u1ee5ng lo\u1ea1i x\u0103ng c\u00f3 ch\u1ec9 s\u1ed1 Octan kh\u00e1c lo\u1ea1i \u0111ang d\u00f9ng, h\u1ec7 th\u1ed1ng s\u1ebd l\u1eadp t\u1ee9c \u0111\u01b0a \u0111\u1ed9ng c\u01a1 v\u1ec1 tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u01b0u nh\u1ea5t \u0111\u1ed1i v\u1edbi lo\u1ea1i x\u0103ng \u0111\u00f3 b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i th\u00f4ng s\u1ed1 d\u00f2ng nhi\u00ean li\u1ec7u, d\u00f2ng kh\u00f4ng kh\u00ed \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh h\u1ed7n h\u1ee3p x\u0103ng-gi\u00f3, ra l\u1ec7nh cho bugi \u0111\u00e1nh l\u1eeda s\u1edbm hay mu\u1ed9n (\u0111\u1ed9 \u0111\u00e1nh l\u1eeda s\u1edbm t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi ch\u1ec9 s\u1ed1 Octan, 60 \u0111\u1ed1i v\u1edbi x\u0103ng 93, 80 v\u1edbi x\u0103ng 96 v\u00e0 mu\u1ed9n 40 v\u1edbi x\u0103ng 91). Tuy nhi\u00ean, tr\u00ean th\u1ef1c t\u1ebf, v\u1eabn c\u00f3 m\u1ed9t gi\u00e1 tr\u1ecb v\u1ec1 ch\u1ec9 s\u1ed1 Octan t\u1ed1i \u01b0u d\u00e0nh cho t\u1eebng lo\u1ea1i \u0111\u1ed9ng c\u01a1 \u1edf t\u1eebng \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh nh\u1ea5t \u0111\u1ecbnh, gi\u00e1 tr\u1ecb n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u01b0a ra, v\u00ec v\u1eady b\u1ea1n c\u1ea7n ph\u1ea3i t\u00f4n tr\u1ecdng c\u00e1c khuy\u1ebfn c\u00e1o v\u00e0 c\u1ea9n tr\u1ecdng v\u1edbi nh\u1eefng quy\u1ebft \u0111\u1ecbnh c\u1ee7a m\u00ecnh.<\/p>\n N\u1ebfu lo\u1ea1i nhi\u00ean li\u1ec7u s\u1eed d\u1ee5ng c\u00f3 ch\u1ec9 s\u1ed1 Octan \u0111\u00fang nh\u01b0 y\u00eau c\u1ea7u, b\u1ea1n c\u0169ng kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng h\u01a1n so v\u1edbi s\u1eed d\u1ee5ng lo\u1ea1i nhi\u00ean li\u1ec7u c\u00f3 ch\u1ec9 s\u1ed1 Octan cao h\u01a1n. \u0110\u1ed9ng c\u01a1 \u0111ang v\u1eadn h\u00e0nh tr\u01a1n tru \u1edf \u0111i\u1ec1u ki\u1ec7n t\u1ed1i \u01b0u, v\u00ec th\u1ebf, m\u1ed9t nhi\u00ean li\u1ec7u c\u00f3 ch\u1ec9 s\u1ed1 Octan cao h\u01a1n s\u1ebd ch\u1eb3ng c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 n\u00e0o \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u00fang. H\u01a1n n\u1eefa, khi s\u1edf h\u1eefu m\u1ed9t chi\u1ebfc xe \u0111\u01b0\u1ee3c trang b\u1ecb nh\u1eefng h\u1ec7 th\u1ed1ng hi\u1ec7n \u0111\u1ea1i nh\u01b0 v\u1eady, b\u1ea1n c\u1ea7n ph\u1ea3i l\u01b0u r\u1eb1ng hai y\u1ebfu t\u1ed1 c\u00f4ng su\u1ea5t \u0111\u1ed9ng c\u01a1 v\u00e0 s\u1eed d\u1ee5ng nhi\u00ean li\u1ec7u m\u1ed9t c\u00e1ch kinh t\u1ebf c\u00f3 vai tr\u00f2 ngang nhau. Nhi\u00ean li\u1ec7u c\u00f3 ch\u1ec9 s\u1ed1 Octan cao h\u01a1n \u0111\u01b0\u01a1ng nhi\u00ean s\u1ebd \u0111\u1eaft h\u01a1n, v\u00e0 nh\u01b0 v\u1eady b\u1ea1n s\u1ebd ph\u1ea3i chi nhi\u1ec1u ti\u1ec1n h\u01a1n.<\/p>\n C\u00f2n n\u1ebfu nhi\u00ean li\u1ec7u c\u00f3 ch\u1ec9 s\u1ed1 Octan th\u1ea5p h\u01a1n ch\u1ec9 s\u1ed1 Octan t\u1ed1i \u01b0u kh\u00f4ng \u0111\u00e1ng k\u1ec3 th\u00ec vi\u1ec7c b\u1ea1n s\u1eed d\u1ee5ng nhi\u00ean li\u1ec7u c\u00f3 ch\u1ec9 s\u1ed1 Octan cao h\u01a1n s\u1ebd l\u00e0m cho h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00e0nh t\u1ef1 \u0111\u1ed9ng chuy\u1ec3n v\u1ec1 \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh t\u1ed1i \u01b0u, l\u00fac \u0111\u00f3 \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n kho\u1ebb h\u01a1n, \u0111\u1ed3ng th\u1eddi v\u1ea5n \u0111\u1ec1 kinh t\u1ebf c\u0169ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n. L\u1eddi khuy\u00ean cu\u1ed1i c\u00f9ng l\u00e0 b\u1ea1n n\u00ean thay \u0111\u1ed5i ch\u1ec9 s\u1ed1 Octan \u1edf c\u00e1c m\u00f9a kh\u00e1c nhau (ch\u1ecdn lo\u1ea1i x\u0103ng c\u00f3 ch\u1ec9 s\u1ed1 Octan th\u1ea5p h\u01a1n v\u1ec1 m\u00f9a \u0111\u00f4ng) \u0111\u1ec3 ti\u1ebft ki\u1ec7m ti\u1ec1n m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m s\u1ee9c m\u1ea1nh c\u1ee7a \u0111\u1ed9ng c\u01a1.<\/p>\n X\u0103ng 95 t\u1ed1t h\u01a1n x\u0103ng 92, 90?<\/strong><\/p>\n Kh\u00f4ng ph\u1ea3i b\u00e0n th\u00eam v\u1ec1 t\u00ednh \u0111a d\u1ea1ng c\u1ee7a ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng s\u1eed d\u1ee5ng tr\u00ean c\u00e1c xe h\u01a1i hi\u1ec7n \u0111\u1ea1i: \u0111\u1ed9ng c\u01a1 x\u0103ng, d\u1ea7u, \u0111i\u1ec7n, \u0111\u1ed9ng c\u01a1 lai hybrid, xe s\u1ea1ch s\u1eed d\u1ee5ng pin nhi\u00ean li\u1ec7u hay n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi. T\u1ea5t c\u1ea3 \u0111\u1ec1u c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng cho xe h\u01a1i ng\u00e0y nay. Tuy v\u1eady, nh\u1eefng ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng m\u1edbi v\u1eabn ph\u1ea3i ch\u1ea5p nh\u1eadn vai tr\u00f2 l\u00e9p v\u1ebf tr\u01b0\u1edbc nhi\u00ean li\u1ec7u ho\u00e1 th\u1ea1ch nh\u01b0 x\u0103ng, d\u1ea7u diesel.<\/p>\n Theo ti\u1ebfn tr\u00ecnh ph\u00e1t tri\u1ec3n c\u1ee7a ng\u00e0nh \u0111\u1ed9ng c\u01a1 \u0111\u1ed1t trong, x\u0103ng c\u0169ng d\u1ea7n \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn th\u00e0nh ph\u1ea7n h\u1ed7n h\u1ee3p cho ph\u00f9 h\u1ee3p. V\u1edbi s\u1ef1 l\u1edbn m\u1ea1nh kh\u00f4ng ng\u1eebng c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p \u00f4t\u00f4. Ng\u00e0y nay nh\u1eefng ch\u1ec9 s\u1ed1 nh\u01b0: Mogas 90, 92, 95, 98, 100\u2026 d\u1ea7n tr\u1edf n\u00ean quen thu\u1ed9c v\u1edbi ng\u01b0\u1eddi s\u1eed d\u1ee5ng xe m\u00e1y, xe h\u01a1i. Trong \u0111\u00f3 \u201cMOGAS\u201d l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a c\u1ee5m t\u1eeb Motor Gasoline, ngh\u0129a l\u00e0 x\u0103ng th\u01b0\u01a1ng m\u1ea1i d\u00f9ng cho \u0111\u1ed9ng c\u01a1. C\u00f2n nh\u1eefng con s\u1ed1 90, 92, 95 ch\u00ednh l\u00e1 tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan RON c\u1ee7a x\u0103ng v\u00e0 c\u0169ng ch\u00ednh l\u00e0 bi\u1ec3u th\u1ecb kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00edch n\u1ed5 c\u1ee7a x\u0103ng. Tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan c\u00e0ng cao th\u00ec kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00edch n\u1ed5 c\u00e0ng l\u1edbn. V\u00e0 n\u00f3 ch\u00ednh l\u00e0 % th\u1ec3 t\u00edch c\u1ee7a izo \u1ed1c \u2013 tan (C8H18) trong h\u1ed7n h\u1ee3p m\u1eabu th\u1eed nghi\u1ec7m g\u1ed3m izo \u1ed1c \u2013 tan v\u00e0 n-heptan (C7H16) \u0111\u01b0\u1ee3c \u0111o kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00edch n\u1ed5 theo nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m kh\u00e1c nhau. Nh\u01b0 v\u1eady n\u1ebfu so s\u00e1nh tr\u1ef1c ti\u1ebfp ba lo\u1ea1i x\u0103ng hi\u1ec7n \u0111ang b\u00e1n tr\u00ean th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam l\u00e0 Mogas 90, 92 v\u00e0 95 th\u00ec x\u0103ng Mogas 95 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00edch n\u1ed5 t\u1ed1t nh\u1ea5t. Ngo\u00e0i l\u1ee3i th\u1ebf r\u00f5 r\u1ec7t v\u1ec1 tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan cao, x\u0103ng 95 c\u00f2n c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m so v\u1edbi x\u0103ng 92 v\u00e0 90 v\u1ec1 c\u00e1c \u0111\u1eb7c t\u00ednh k\u0129 thu\u1eadt.<\/p>\n X\u0103ng th\u1eadt v\u00e0 x\u0103ng r\u1edfm<\/strong><\/p>\n \u0110\u00e3 c\u00f3 x\u0103ng RON 95 ch\u1ea5t l\u01b0\u1ee3ng cao, \u0111\u01b0\u01a1ng nhi\u00ean th\u1ecb tr\u01b0\u1eddng s\u1ebd xu\u1ea5t hi\u1ec7n nh\u1eefng lo\u1ea1i x\u0103ng \u201cgi\u1ea3 danh ch\u1ea5t l\u01b0\u1ee3ng cao\u201d. D\u01b0\u1edbi g\u00f3c \u0111\u1ed9 n\u00e0o \u0111\u00f3, ng\u01b0\u1eddi mua x\u0103ng v\u1eabn ch\u1eadc l\u01b0\u1ee1i, \u00f4i d\u00e0o, x\u0103ng 90, 92 hay 95 g\u00ec \u0111\u00f3\u2026 lo\u1ea1i n\u00e0o m\u00e0 ch\u1eb3ng th\u1ebf, b\u1ea5y l\u00e2u nay d\u00f9ng m\u00e3i 90 hay 92 c\u00f3 th\u1ea5y ch\u1ebft xe \u0111\u00e2u. Qu\u1ea3 th\u1eadt trong m\u1ed9t th\u1eddi gian ng\u1eafn th\u00ec kh\u00f3 c\u00f3 th\u1ec3 th\u1ea5y \u0111\u01b0\u1ee3c h\u1eadu qu\u1ea3 c\u1ee7a vi\u1ec7c d\u00f9ng kh\u00f4ng \u0111\u00fang lo\u1ea1i x\u0103ng. Nh\u01b0ng \u0111\u1ed1i v\u1edbi nh\u00e0 thi\u1ebft k\u1ebf \u0111\u1ed9ng c\u01a1 kh\u00f4ng nh\u01b0 v\u1eady! \u0110\u1ed9ng c\u01a1 x\u0103ng thu\u1ed9c lo\u1ea1i \u0111\u1ed9ng c\u01a1 \u0111\u1ed1t ch\u00e1y c\u01b0\u1ee1ng b\u1ee9c v\u00ec v\u1eady ng\u01b0\u1eddi ta lu\u00f4n t\u00ecm m\u1ecdi gi\u1ea3i ph\u00e1p tr\u00e1nh kh\u00f4ng \u0111\u1ec3 x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng t\u1ef1 k\u00edch n\u1ed5. V\u1eady hi\u1ec7n t\u01b0\u1ee3ng k\u00edch n\u1ed5 l\u00e0 g\u00ec? \u0110\u1ed1i v\u1edbi \u0111\u1ed9ng c\u01a1 x\u0103ng n\u00f3i chung (d\u00f9ng ch\u1ebf ho\u00e0 kh\u00ed hay phun x\u0103ng \u0111i\u1ec7n t\u1eed), qu\u00e1 tr\u00ecnh ch\u00e1y xu\u1ea5t ph\u00e1t t\u1eeb tia l\u1eeda \u0111i\u1ec7n. Tia l\u1eeda \u0111i\u1ec7n sinh ra m\u00e0ng l\u1eeda ban \u0111\u1ea7u (trung t\u00e2m ngu\u1ed3n ch\u00e1y) r\u1ed3i lan\u00a0 r\u1ed9ng, \u0111\u1ed1t h\u1ebft ho\u00e0 kh\u00ed trong bu\u1ed3ng ch\u00e1y. S\u1ef1 ch\u00e1y b\u00ecnh th\u01b0\u1eddng c\u00f3 t\u1ed1c \u0111\u1ed9 lan tr\u00e0n c\u1ee7a m\u00e0ng l\u1eeda kho\u1ea3ng 15 \u2013 30 m\/s. C\u00f2n khi ch\u00e1y k\u00edch n\u1ed5 do c\u00e1c ph\u1ea7n t\u1eed ho\u1ea1t ho\u00e1 c\u1ee7a nhi\u00ean li\u1ec7u ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c ngu\u1ed3n nhi\u1ec7t b\u1ea5t th\u01b0\u1eddng s\u1ebd t\u1ea1o ra s\u1ef1 ch\u00e1y k\u00edch n\u1ed5. V\u1eadn t\u1ed1c lan truy\u1ec1n c\u1ee7a m\u00e0ng l\u1eeda do hi\u1ec7n t\u01b0\u1ee3ng t\u1ef1 k\u00edch n\u1ed5 (1500 \u2013 2000 m\/s) c\u00f3 th\u1ec3 l\u1edbn g\u1ea5p tr\u0103m l\u1ea7n v\u1eadn t\u1ed1c lan truy\u1ec1n c\u1ee7a m\u00e0ng l\u1eeda ch\u00e1y b\u00ecnh th\u01b0\u1eddng (15 \u2013 30 m\/s). Do \u0111\u00f3 \u00e1p su\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9 trong bu\u1ed3ng \u0111\u1ed1t s\u1ebd t\u0103ng \u0111\u1ed9t bi\u1ebfn sinh ra s\u00f3ng va \u0111\u1eadp v\u1edbi t\u1ea7n s\u1ed1 v\u00e0 bi\u00ean \u0111\u1ed9 l\u1edbn t\u1ea1o ti\u1ebfng g\u00f5, n\u01b0\u1edbc s\u00f4i, gi\u1ea3m c\u00f4ng su\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t \u0111\u1ed9ng c\u01a1, \u0111\u1eb7c bi\u1ec7t c\u00f3 th\u1ec3 g\u00e2y ra h\u01b0 h\u1ecfng nghi\u00eam tr\u1ecdng nh\u01b0 b\u00f3 m\u00e1y, ch\u00e1y piston\u2026 M\u1ed9t \u0111i\u1ec1u c\u01a1 b\u1ea3n l\u00e0 tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan c\u00f3 li\u00ean quan m\u1eadt thi\u1ebft v\u1edbi t\u1ec9 s\u1ed1 n\u00e9n c\u1ee7a \u0111\u1ed9ng c\u01a1, m\u1ed1i quan h\u1ec7 n\u00e0y t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi nhau. Ngh\u0129a l\u00e0 \u0111\u1ed9ng c\u01a1 c\u00f3 t\u1ec9 s\u1ed1 n\u00e9n c\u00e0ng cao th\u00ec ph\u1ea3i s\u1eed d\u1ee5ng x\u0103ng c\u00f3 tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan c\u00e0ng l\u1edbn. V\u00ec v\u1eady c\u00e1c xe hi\u1ec7n \u0111\u1ea1i khi d\u00f9ng x\u0103ng c\u00f3 tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan th\u1ea5p h\u01a1n ti\u00eau chu\u1ea9n th\u00ec l\u01b0\u1ee3ng ti\u00eau th\u1ee5 nhi\u00ean li\u1ec7u s\u1ebd t\u0103ng m\u00e0 \u0111\u1ed9ng c\u01a1 l\u1ea1i kh\u00f4ng ph\u00e1t huy \u0111\u01b0\u1ee3c h\u1ebft c\u00f4ng xu\u1ea5t, ch\u1ea1y kh\u00f4ng b\u1ed1c.<\/p>\n \u0110i\u1ec3m \u0111\u00e1ng bu\u1ed3n trong b\u1ed1i c\u1ea3nh x\u0103ng, d\u1ea7u hi\u1ec7n nay \u1edf n\u01b0\u1edbc m\u00ecnh ch\u00ednh l\u00e0 n\u1ea1n x\u0103ng b\u1ec7nh v\u1eabn c\u00f2n t\u1ed3n t\u1ea1i. N\u1ebfu b\u1ea1n \u0111\u1ec3 \u00fd khi s\u1eed d\u1ee5ng xe m\u00e1y, b\u1ea1n s\u1ebd th\u1ea5y c\u00f3 nhi\u1ec1u ng\u00e0y xe ch\u1ea1y r\u1ea5t \u00eam. Trong khi \u0111\u00f3 th\u1ec9nh tho\u1ea3ng m\u00e1y r\u1ea5t g\u1eb1n v\u00e0 n\u00f3ng, ga c\u1ea3m gi\u00e1c kh\u00f4ng \u0111\u01b0\u1ee3c tr\u01a1n nh\u01b0 m\u1ecdi ng\u00e0y. X\u0103ng c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t nguy\u00ean nh\u00e2n c\u1ee7a t\u00ecnh tr\u1ea1ng tr\u00ean.\u00a0T\u00ecnh tr\u1ea1ng gian l\u1eadn x\u0103ng d\u1ea7u kh\u00e1 \u0111a d\u1ea1ng, ngo\u00e0i vi\u1ec7c t\u00ecm c\u00e1ch b\u01a1m kh\u00f4ng \u0111\u1ee7, nhi\u1ec1u c\u1eeda h\u00e0ng l\u1ebb c\u00f2n pha l\u1eabn c\u00e1c lo\u1ea1i x\u0103ng v\u1edbi nhau, v\u00ed d\u1ee5 nh\u01b0 pha l\u1eabn x\u0103ng 90 v\u1edbi 92 r\u1ed3i b\u00e1n nh\u01b0 x\u0103ng 92 h\u00f2ng ki\u1ebfm l\u1ee3i nhu\u1eadn cao. M\u1ed9t s\u1ed1 th\u1ee3 s\u1eeda xe c\u00f2n cho bi\u1ebft, x\u0103ng c\u00f2n \u0111\u01b0\u1ee3c pha l\u1eabn v\u1edbi d\u1ea7u ho\u1ea3 \u0111\u1ec3 b\u00e1n, nh\u1ea5t l\u00e0 t\u1ea1i m\u1ed9t s\u1ed1 \u0111i\u1ec3m b\u00e1n x\u0103ng chai d\u1ecdc \u0111\u01b0\u1eddng. X\u0103ng b\u00e2y gi\u1edd c\u00f3 th\u1ec3 mua \u0111\u01b0\u1ee3c \u1edf r\u1ea5t nhi\u1ec1u \u0111i\u1ec3m, h\u1ec5 n\u01a1i n\u00e0o c\u00f3 xe c\u1ed9 qua l\u1ea1i l\u00e0 s\u1ebd c\u00f3 c\u00e2y x\u0103ng m\u1ecdc l\u00ean, nh\u00e0 n\u01b0\u1edbc c\u00f3, t\u01b0 nh\u00e2n c\u00f3, x\u0103ng chai \u201cv\u1ec7 \u0111\u01b0\u1eddng\u201d\u2026 Ph\u1ea7n l\u1edbn ch\u00fang ta th\u01b0\u1eddng \u0111\u1ed5 x\u0103ng theo th\u00f3i quen, ch\u1ecdn c\u00e2y x\u0103ng tr\u00ean \u0111\u01b0\u1eddng t\u1eeb nh\u00e0 \u0111\u1ebfn c\u00f4ng s\u1edf. Ho\u1eb7c n\u1ebfu ch\u1eb3ng may x\u0103ng xe h\u1ebft d\u1ecdc \u0111\u01b0\u1eddng th\u00ec ch\u1ecdn m\u1ed9t c\u00e2y x\u0103ng g\u1ea7n nh\u1ea5t \u0111\u1ec3 b\u01a1m. Nh\u1eefng ng\u01b0\u1eddi mua x\u0103ng c\u00f3 kinh nghi\u1ec7m th\u00ec kh\u00e1c. H\u1ecd ch\u1ecdn nh\u1eefng c\u00e2y x\u0103ng l\u1edbn, kh\u00e1ch \u0111\u00f4ng ngh\u1eb9t, \u0111\u1eb7c bi\u1ec7t c\u00f3 nhi\u1ec1u lo\u1ea1i \u00f4t\u00f4 \u0111\u1ed5 x\u0103ng. Trong tr\u01b0\u1eddng h\u1ee3p \u201cb\u1ea5t \u0111\u1eafc d\u0129\u201d nh\u01b0 h\u1ebft x\u0103ng d\u1ecdc \u0111\u01b0\u1eddng th\u00ec c\u0169ng \u0111\u00e0nh \u0111\u1ed5 t\u1ea1m m\u1ed9t l\u01b0\u1ee3ng v\u1eeba ph\u1ea3i \u0111\u1ec3 t\u00ecm t\u1edbi nh\u1eefng tr\u1ea1m x\u0103ng tin c\u1eady. V\u00ec v\u1eady c\u00f3 nh\u1eefng c\u00e2y x\u0103ng lu\u00f4n \u0111\u00f4ng k\u00edn kh\u00e1ch, ng\u01b0\u1ee3c l\u1ea1i c\u00f3 nh\u1eefng c\u00e2y x\u0103ng v\u1eabn \u201chiu qu\u1ea1nh\u201d!<\/p>\n Xe hi\u1ec7n \u0111\u1ea1i c\u1ea7n d\u00f9ng x\u0103ng cao c\u1ea5p<\/strong><\/p>\n Tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan c\u1ee7a x\u0103ng l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng quy\u1ebft \u0111\u1ecbnh qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh c\u1ee7a \u0111\u1ed9ng c\u01a1. S\u1eed d\u1ee5ng \u0111\u00fang x\u0103ng d\u00f9ng \u0111\u1ec3 \u0111\u1ed9ng c\u01a1 ho\u1ea1t \u0111\u1ed9ng \u00eam \u1ea3, kho\u1ebb kho\u1eafn v\u00e0 b\u1ec1n l\u00e2u l\u00e0 y\u00eau c\u1ea7u h\u00e0ng \u0111\u1ea7u v\u1edbi ch\u1ee7 s\u1edf h\u1eefu xe.<\/p>\n Lo\u1ea1i x\u0103ng d\u00f9ng cho xe th\u01b0\u1eddng \u0111\u01b0\u1ee3c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u01b0a ra trong m\u1ee5c h\u01b0\u1edbng d\u1eabn k\u0129 thu\u1eadt s\u1eed d\u1ee5ng. Ngo\u00e0i ra, b\u1ea1n c\u00f2n ch\u1ecdn l\u1ef1a \u0111\u01b0\u1ee3c lo\u1ea1i x\u0103ng ph\u00f9 h\u1ee3p n\u1ebfu bi\u1ebft lo\u1ea1i \u0111\u1ed9ng c\u01a1 tr\u00ean xe b\u1ea1n c\u00f3 t\u1ec9 s\u1ed1 n\u00e9n nh\u01b0 th\u1ebf n\u00e0o. C\u00e1c c\u00f4ng tr\u00ecnh nghi\u00ean c\u1ee9u v\u1ec1 x\u0103ng \u0111\u00e3 \u0111\u01b0a ra m\u1ed1i quan h\u1ec7 t\u1ed1i \u01b0u gi\u1eefa t\u1ef7 s\u1ed1 n\u00e9n \u0111\u1ed9ng c\u01a1 v\u00e0 tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan \u0111o theo ph\u01b0\u01a1ng ph\u00e1p RON (tham kh\u1ea3o b\u1ea3ng 1)<\/p>\n B\u1ea3ng 1 (\u00a0T\u1ef7 s\u1ed1 n\u00e9n \u0111\u1ed9ng c\u01a1 v\u00e0 tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan \u0111o theo ph\u01b0\u01a1ng ph\u00e1p RON )<\/em><\/p>\n B\u1ea3ng th\u00f4ng s\u1ed1 tr\u00ean cho th\u1ea5y s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a x\u0103ng 95 s\u1ebd \u0111\u00e1p \u1ee9ng t\u1ed1t cho lo\u1ea1i xe m\u00e0 \u0111\u1ed9ng c\u01a1 c\u00f3 t\u1ec9 s\u1ed1 n\u00e9n n\u1eb1m trong d\u1ea3i t\u1eeb 9:1 \u0111\u1ebfn 10:1. X\u00e9t ri\u00eang v\u1ec1 \u00f4t\u00f4 th\u00ec \u0111a ph\u1ea7n xe m\u1edbi, l\u1eafp r\u00e1p trong n\u01b0\u1edbc th\u01b0\u1eddng c\u00f3 t\u1ec9 s\u1ed1 n\u00e9n thu\u1ed9c d\u1ea3i tr\u00ean (tham kh\u1ea3o b\u1ea3ng 2). V\u1ec1 xe m\u00e1y th\u00ec tr\u1eeb d\u00f2ng xe Piaggo h\u1ea7u h\u1ebft c\u0169ng c\u00f3 t\u1ec9 s\u1ed1 n\u00e9n nh\u1ecf h\u01a1n 10:1. V\u1ec1 nguy\u00ean t\u1eafc, x\u0103ng c\u00f3 c\u00f3 tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan cao th\u00ec v\u1eabn c\u00f3 th\u1ec3 s\u1eed \u0111\u01b0\u1ee3c cho c\u00e1c lo\u1ea1i xe c\u00f3 t\u1ec9 s\u1ed1 n\u00e9n th\u1ea5p, nh\u01b0ng s\u1ebd kh\u00f4ng mang l\u1ea1i l\u1ee3i \u00edch v\u00e0 kh\u00f4ng kinh t\u1ebf.<\/p>\n C\u1ee5 th\u1ec3, n\u1ebfu d\u00f9ng x\u0103ng 95 xe c\u00f3 t\u1ec9 s\u1ed1 n\u00e9n th\u1ea5p, v\u1eadn h\u00e0nh v\u1edbi t\u1ed1c \u0111\u1ed9 kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 50 \u2013 60 km\/h, ho\u1eb7c xe c\u00f3 dung t\u00edch d\u01b0\u1edbi 70 cc\u2026c\u0169ng kh\u00f4ng n\u00e2ng c\u00f4ng su\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t ho\u1ea1t \u0111\u1ed9ng l\u00ean \u0111\u01b0\u1ee3c. Nh\u01b0ng vi\u1ec7c s\u1eed d\u1ee5ng x\u0103ng c\u00f3 tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan th\u1ea5p cho xe c\u00f3 t\u1ec9 s\u1ed1 n\u00e9n cao th\u00ec ho\u00e0n to\u00e0n kh\u00f4ng n\u00ean, v\u00ec kh\u00f4ng c\u00f3 l\u1ee3i khi xe v\u1eadn h\u00e0nh. \u0110\u00f3 l\u00e0 ch\u01b0a k\u1ec3 \u0111\u1ebfn t\u00e1c h\u1ea1i kh\u00ed th\u1ea3i g\u00e2y ra khi d\u00f9ng kh\u00f4ng \u0111\u00fang lo\u1ea1i x\u0103ng. \u0110\u00e3 c\u00f3 b\u00e1n x\u0103ng RON 95! \u0110\u00e2y l\u00e0 m\u1ed9t tin vui l\u00e0m y\u00ean l\u00f2ng nh\u1eefng ng\u01b0\u1eddi s\u1eed d\u1ee5ng \u00f4t\u00f4 v\u00e0 xe m\u00e1y thu\u1ed9c d\u00f2ng xe cao c\u1ea5p nh\u01b0: BMW series 7, Porsche Cayenne, Lexus GS 430, Mercedes S \u2013 Class v\u00e0 c\u00e1c lo\u1ea1i xe m\u00e1y nh\u01b0 Piaggio, Honda Dylan, @, SH\u2026<\/p>\n Ngu\u1ed3n: s\u01b0u t\u1ea7m<\/p>\n","protected":false},"excerpt":{"rendered":" K\u00edch n\u1ed5 l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng n\u1ed5 qu\u00e1 s\u1edbm so v\u1edbi th\u1eddi \u0111i\u1ec3m n\u1ed5 th\u00edch h\u1ee3p do Bu-gi k\u00edch ho\u1ea1t, x\u1ea3y ra \u1edf cu\u1ed1i k\u1ef3 n\u00e9n. H\u1ed7n h\u1ee3p kh\u00f4ng kh\u00ed v\u00e0 nhi\u00ean li\u1ec7u t\u1ef1 b\u1ed1c ch\u00e1y tr\u01b0\u1edbc c\u1ea3 khi Bu-gi \u0111\u00e1nh l\u1eeda. \u0110\u00e1m ch\u00e1y lan r\u1ed9ng, k\u00e8m theo \u0111\u00f3 \u00e1p su\u1ea5t t\u0103ng cao \u1edf khu v\u1ef1c […]\n","protected":false},"author":1,"featured_media":121,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"_links":{"self":[{"href":"https:\/\/demo.bmconnect.vn\/motocare\/wp-json\/wp\/v2\/posts\/120"}],"collection":[{"href":"https:\/\/demo.bmconnect.vn\/motocare\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/demo.bmconnect.vn\/motocare\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/demo.bmconnect.vn\/motocare\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/demo.bmconnect.vn\/motocare\/wp-json\/wp\/v2\/comments?post=120"}],"version-history":[{"count":1,"href":"https:\/\/demo.bmconnect.vn\/motocare\/wp-json\/wp\/v2\/posts\/120\/revisions"}],"predecessor-version":[{"id":122,"href":"https:\/\/demo.bmconnect.vn\/motocare\/wp-json\/wp\/v2\/posts\/120\/revisions\/122"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/demo.bmconnect.vn\/motocare\/wp-json\/wp\/v2\/media\/121"}],"wp:attachment":[{"href":"https:\/\/demo.bmconnect.vn\/motocare\/wp-json\/wp\/v2\/media?parent=120"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/demo.bmconnect.vn\/motocare\/wp-json\/wp\/v2\/categories?post=120"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/demo.bmconnect.vn\/motocare\/wp-json\/wp\/v2\/tags?post=120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n\n
\n T\u1ef7 s\u1ed1 n\u00e9n<\/strong><\/td>\n Ch\u1ec9 s\u1ed1 Octan t\u1ed1i \u01b0u<\/strong><\/td>\n T\u1ef7 s\u1ed1 n\u00e9n<\/strong><\/td>\n Ch\u1ec9 s\u1ed1 Octan t\u1ed1i \u01b0u<\/strong><\/td>\n<\/tr>\n \n 5:1<\/td>\n 72<\/td>\n 9:1<\/td>\n 96<\/td>\n<\/tr>\n \n 6:1<\/td>\n 81<\/td>\n 10:1<\/td>\n 100<\/td>\n<\/tr>\n \n 7:1<\/td>\n 87<\/td>\n 11:1<\/td>\n 104<\/td>\n<\/tr>\n \n 8:1<\/td>\n 92<\/td>\n 12:1<\/td>\n 108<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \n\n
\n T\u1ef7 s\u1ed1 n\u00e9n<\/strong><\/td>\n Tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan (RON) t\u1ed1i \u01b0u<\/strong><\/td>\n T\u1ef7 s\u1ed1 n\u00e9n<\/strong><\/td>\n Tr\u1ecb s\u1ed1 \u1ed1c \u2013 tan (RON) t\u1ed1i \u01b0u<\/strong><\/td>\n<\/tr>\n \n 5:1<\/td>\n 72<\/td>\n 9:1<\/td>\n 95<\/td>\n<\/tr>\n \n 6:1<\/td>\n 81<\/td>\n 10:1<\/td>\n 100<\/td>\n<\/tr>\n \n 7:1<\/td>\n 87<\/td>\n 11:1<\/td>\n 104<\/td>\n<\/tr>\n \n 8:1<\/td>\n 92<\/td>\n 12:1<\/td>\n 108<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \n\n
\n Lo\u1ea1i xe<\/strong><\/td>\n T\u1ec9 s\u1ed1 n\u00e9n<\/strong><\/td>\n<\/tr>\n \n Toyota\u00a0Camry 2.4<\/td>\n 9.5 : 1<\/td>\n<\/tr>\n \n Toyota\u00a0Camry 3.0<\/td>\n 10.2 : 1<\/td>\n<\/tr>\n \n Toyota\u00a0Land\u00a0Cruiser<\/td>\n 10.2 : 1<\/td>\n<\/tr>\n \n Mazda Premacy<\/td>\n 9.2 : 1<\/td>\n<\/tr>\n \n Ford Escape XLT 3.0<\/td>\n 10.0 : 1<\/td>\n<\/tr>\n \n Ford Modeo 2.5<\/td>\n 9.7 : 1<\/td>\n<\/tr>\n \n Mercedes \u2013 Benz E240 2.6<\/td>\n 10.2 : 1<\/td>\n<\/tr>\n \n BMW 318iA 2.0<\/td>\n 9.7 : 1<\/td>\n<\/tr>\n \n BMW 525iA 2.5<\/td>\n 10.5 : 1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n