The general composition of car transmission

(2) drive: Bigger than metabolic ratio Ω : If advocate transmission drive leads Ωzu=3 than change, deputy transmission Ωfu=4 criterion Ω=12; If make Ω=12 of simple type transmission, structure often very difficult reasonable.

Defect:

Drive of 1) archives across block concerns than having correspondence, make not easily 2 of every archives, (Speed and traction) very ideal.

2) shifts gear operate troublesome, should operate sometimes two gearshift part, if be land belonging to one production unit but enclosed in that of another shift gear disadvantageous still memory.

Operate to decrease movement, best can shift gear orderly. Take class seriously to weave for this requirement 10 make destroy group drive compares archives to be more than group of the 11st archives entirely, the commutation that achieves most photograph to get a grade needs to operate only advocate the purpose of gearshift, such ability are most convenient.