【導讀】后橋進行有效的優(yōu)化設計計算是非常必要的。驅(qū)動橋處于動力傳動系的末端，其基本功能是增大由傳動軸或變速器傳來的轉(zhuǎn)矩,的垂直力力和橫向力。驅(qū)動橋一般由主減速器、差速器、車輪傳動裝置和驅(qū)動橋。載重汽車顯得尤為重要。驅(qū)動橋設計應當滿足如下基本要求：。好，制造容易，拆裝，調(diào)整方便。智能電子技術在汽車上得以推廣使得汽車在安全行駛和其它功能更上一層樓。有效提高運輸過程中的安全，減少駕駛員。的操縱疲勞度，提高乘客的舒適度。池是迄今為止最有希望解決汽車能源短缺問題的動力源。排放、燃油經(jīng)濟性方面明顯優(yōu)于內(nèi)燃機車輛。這項發(fā)明通常涉及到多能源動力總成的車輛,以及,尤其是多能源動力總成,

　　

【正文】 l axis is that axis, that goes through the roll center of front and rearaxle, see following drawing: Roll Axis If a lateral force is applied at the center of gravity, the moment resulting fom the hight of the center of gravity above the roll axis has to be pensated by a moment caused by the suspension springs due to some roll. The distribution of this moment between front and rear axle depends on the relative spring stiffness of front and rearaxle, the overall roll angle (which is the same for front and rearaxle) depends on the sum of the suspension stiffness (front plus rear). The moment transmitted to the ground without any roll for the overall vehicle is given by the applied lateral force times the roll axis hight (at the position of CG). (Remark: If the roll axis is above the CG, the remaining torque that has to be pensated by the suspension springs would make the car lean inside like a motorcycle!). The distribution of this moment between front and rearaxle can be calculated by calculating each axle seperately, byusing the position of the roll center of the corresponding axleusing the fact that the part of lateral force, that the axle has to carry, corresponds to the part of the normal load, the axle has to carry Differential Examples The characteristics of a limited slip differential are a little bit different for different styles of a selflocking device. The Torsen174。 style differentials (from TORque SENsing) act very fast (and possibly harsh). Under low input torque the differential gears are only lightly loaded and move freely like an open device. With increasing torque (and speed) the gear meshes are loaded up and the two output shafts are locked together. The torque ratio (hightorquewheel divided by lowtorquewheel) varies from max. 7:1 to :1, for the Torsen II style from 3:1 to :1 (depending on gear angles, gear surface treatment, type of bearing(plain, roller...) The Dana TracLoc174。 limitedslip differential (see picture below) contains some preloaded (by Belleville springs) clutch plates, which provide a certain static breakout torque already at zero input torque. The spider gear and side gear mesh are designed in that way (with wedgeshaped gear teeth), that increasing input torque will increase the load on the clutch plates, by this increasing the locking of the axle. Dana TracLoc174。 limitedslip differential The viscous differential locks independent of of torques, but reacts to the speed differences between the output shafts. The contained clutch plates have no mechanical contact, but very tight clearances, so that the viscous friction provides the torque transfer. Note that viscous differentials set in very smooth, and with a certain time delay, as the viscosity increases with the generated heat (means the special fluid is being 39。thicker39。). This makes the handling easier for street use cars (while may be too slow for some racing applications).