The action of transmission

Transmission is one of the mainest parts in car transmission department.

Its action is:

1. The size of the torque on the size of car travelling speed and car drive wheel is changed inside bigger range.

Because car travel condition is different, requirement car travelling speed and drive torque can change inside very big range. Should achieve 100km/h in the speed on high speed road for example, and inside the urban district, speed often is controlled in 50km/h. Empty wagons is in on flat highway when travel, travel resistance is very little, should be fully loaded with uphill when, travel obstruction very big. And the character of car engine is rotate speed span lesser, and torsion span cannot satisfy effective way more besides need.

2. Implementation backs a car travel

Car engine crankshaft can turn to a direction only commonly, and the car needs to be able to go backwards sometimes travel, accordingly, the reverse gear that in often using transmission case, installs will realize a car to back a car travel.

3. Realize empty shelves

When clutch joint, gear-box need not output motivation. Can make sure the driver is in for example engine does not loosen clutch pedal pad leaves driver place when flameout.

Gear-box by clutch operation of gearshift main transfer machinery and gearshift two parts are comprised. The main effect of gearshift main transfer machinery is the numerical value that changes torsion and rotate speed and direction; The main effect of clutch operation is control main transfer machinery, realize the commutation that transmission drive compares, come true namely shift gear, change in order to obtain speed change quadrature.

Mechanical gear-box basically used positive drive fall fast principle. Say simply, the gear wheel that there are many groups of transmission comparing to differ inside gear-box deputy, and when car travel shift gear behavior, carry the gear deputy work that clutch operation makes differ inside gear-box namely. If be when low speed, make transmission more deputy than large gear wheel work, and when high speed, make transmission more deputy than little gear wheel work.