| 摘要 |
A drive system for a vehicle, particularly suited for use with highway construction equipment. The system employs a constant speed engine driving a variable displacement pump, and the pump, in turn, drives a variable displacement motor and a fixed displacement motor connected in parallel to the pump. The motors are connected in parallel to the drive wheel means of the vehicle. Controls are provided to operate the pump between zero and maximum displacement while the variable displacement motor is at maximum displacement, and to vary the displacement of the motor while the pump is at maximum displacement, such that the drive wheels of the vehicle are provided a maximum torque in the lower speed range where the hardest work is done by the vehicle, yet provide for higher speeds at reduced torque for traveling from one location to another. A dual drive system is also disclosed.
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