초록 ▼

For the drive of a vehicle having at least one driven axle, in particular a rail vehicle, a secondarily controlled hydrostatic drive is provided which is connected to a pressure network with impressed pressure. The respective travelling direction and the acceleration and retardation is set at a desi

For the drive of a vehicle having at least one driven axle, in particular a rail vehicle, a secondarily controlled hydrostatic drive is provided which is connected to a pressure network with impressed pressure. The respective travelling direction and the acceleration and retardation is set at a desired value pickup or generator which is part of a speed control circuit. The circuit arrangement according to the invention solves the problem of avoiding slipping of the drive wheels on acceleration and retardation. In addition, the determined acceleration and retardation values can be superimposed to avoid inadmissible wheel slip and obtain optimum accelerations and retardation operations. For this purpose the circuit arrangement employs a ramp former to which as control voltage various voltages proportional to different operating parameters are supplied, in particular a voltage dependent on the speed of rotation.

대표청구항 ▼

A control circuit arrangement for the drive of a vehicle having at least two axles, a driven axle and a second axle, the control circuit arrangement comprising a hydrostatic machine coupled to the driven axle with adjustable absorption and displacement volumes in both directions of rotation for driv

A control circuit arrangement for the drive of a vehicle having at least two axles, a driven axle and a second axle, the control circuit arrangement comprising a hydrostatic machine coupled to the driven axle with adjustable absorption and displacement volumes in both directions of rotation for driving said driven axle in forward or reverse directions and for braking said driven axle in either direction of rotation, said hydrostatic machine being connected to a pressure network with impressed pressure, a valve means for operating an adjustment means of said hydrostatic machine for adjusting its absorption and displacement volume, a speed control circuit responsive to a speed desired value and a speed actual value signal for generating an error signal for driving said valve means, a means for providing the speed actual value signal from the speed of said driven axle to the speed control circuit, a means for providing a difference signal from the difference formed between the speed actual value signal and a signal corresponding to the speed of the second axle of the vehicle, a means for comparing said difference signal with said error signal, and a means for reducing the torque of the drive in response to a comparison of said difference signal and said error signal.