1. The number of gear
The number refers to the number of gear shifting gears car, usually have a number of forward gear stage gear transmission. It refers to an engine stall speed in certain circumstances, for adjusting the gear ratio of the transmission, so as to achieve a reasonable torque. The more the number of stalls, the finer the division of the engine power output region, so that the engine is operating in can make a smaller speed range, at any time to ensure the best working condition, not only can better power output, but also to ensure a more good fuel economy, the disadvantage is the more complex the more the number of gear structure, the manufacturing cost is relatively high. Today, the number of gears in the transmission are substantially 4-8.
Most of the manual transmission are 5-speed or 6 forward gears, wherein the gear 5 is more, such as: Jetta, Civic like; gear 6 is relatively small, such as: Corolla, Pentium, 1.6 T Regal and so on.
Most automatic transmission shift are 4-6, more advanced file 7 and 8 speed. One of the common models 4 files are: qida, Yue, Fox and the like; common models fifth gear are: Civic, Accord, Rui wing like; 6 speed common models are: Sunny, Regal, magotan like; common models 7 profile are: Mercedes many models, the Golf 6 on behalf of other 8-speed models is very small, only Lexus LS460 series, BMW 5 series GT.