| 摘要 |
A ground engaged vehicle (10) includes a front portion (12) and a rear porti on (14) joined by an articulation (60). The articulation rotates around a longitudinal axis. An engine drives a hydrostatic pump (100) which drives fo ur hydrostatic motors (130, 132, 134, 136), each of the hydrostatic motors in operative engagement with one of four wheels (50, 52). The wheels are on whe el mounts (40), each of the wheel mounts having a vertical axis around which on e of the four wheels with one of the hydrostatic motors is turnable. A steerin g system turns the two wheels of the front portion in a first direction and th e two wheels of the rear portion in an opposite direction. The steering system is powered by the hydrostatic pump. A pedal control system (300) has a first pedal controlling driving the vehicle in a forward direction and a second pedal controlling driving the vehicle in a rearward direction.
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