TAILIEUCHUNG - The Motor Vehicle 2010 Part 15

Tham khảo tài liệu 'the motor vehicle 2010 part 15', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 1006 The Motor Vehicle Fig. Diagrammatic representation of the mechanical component layout for the Mercedes-Benz 4MATIC traction control system for 4-wheel drive Fig. To avoid drive line vibration the front axle gear set is bolted to one side of the engine oil sump and further supported by a bracket on the crankcase of this Mercedes V6 engine relative to that for 2-wheel drive the output from the automatic transmission is taken through a twin-planet gear set. To obviate vibration when the vehicle is cornering the planetary gears run in precision needle roller bearings. The output from this gear set is transmitted to a short shaft to the rear end of which is connected the propeller shaft for the rear axle differential. A gear on this short shaft transmits the drive through an idler to a gear on the shaft connected to the propeller shaft extending forward alongside the engine to the front wheel drive gear set. The torque distribution 65 rear and 35 front is determined by the gear ratios of the front and rear differentials. To provide constant 4-wheel drive mechanical or hydraulic locking devices in the differentials were ruled out. Instead the electronic traction control system comes into operation as soon as one or more of the drive wheels starts to spin. This reduces the torque transmitted to the wheel or wheels to Servo- and power-operated and regenerative braking systems 1007 Fig. From the engine crankshaft the drive is taken through a planetary reduction gear directly to the rear propeller shaft and also through a second gear train alongside the first to the front axle gear set Fig. Layout of the transfer gearbox with above left details of the twin planet train to a larger scale the road and redistributes it to the other wheels until the spin speed falls below a predetermined value in relation to the speed of the vehicle. Additionally an Electronic Stability Program ESP comes into action to apply the brakes on each side differentially .

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