Voith Turbo Gmbh Co. Kg

Manfred Bek

Bernd Dietzel

An electro-hydraulic control system with electronic control for a gearbox includes at least one actuator element device for receiving an analog measuring signal from the actuator element(s), a device for forming an actual actuator value from the analog measuring signal for the regulation of the actuator element(s), a computing device with a memory, and an output driver. At least one A/D converter is provided to convert the actual analog actuator element value (U ) and/or the analog actuator element measuring value into a digital value. A digital two-step controller regulates the actuator element(s) by a cyclically-called comparison of theoretical and actual values.

Electronic control for a transmission control system

A digital two-step controller for an actuator element includes an A/D converter, an output driver and a control device with a memory. An analog measuring signal is received from the actuator, converted in the A/D converter into an actual digital value, and is input into a first region of the memory of the control device. The actual digital value which is input into the first region of the memory is compared with a theoretical digital value for the actuator, which value is stored in a second region. The output of the control device to the output driver is set to ZERO when the actual digital value is larger or equal to the theoretical digital value. The output of the control device to the output driver is set to ONE when the theoretical digital value is greater than the actual digital value. After a sampling period &Dgr;t, another analog measuring signal is received from the actuator and the regulation steps are repeated in an interrupt called in cycles and corresponding to the sampling interval.

Digital two-step controller for an actuator element

A method and apparatus for the operation of a vehicle with a plurality of electric motors includes an electric motor assigned to each wheel of an axle of the vehicle. Attached to each of the electric motors is a shiftable transmission (at least two-speeds). Shifting of a transmission is performed as a function of the total efficiency of the particular motor when reaching a predetermined shifting point. The transmissions attached to the electric motors are shifted, delayed in time. The shifting of the transmission attached to a first electric motor is monitored and the shifting of a transmission attached to a second motor is performed only when the shifting of the first transmission is completed. No interruption of the traction force occurs in the drive system.

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Heidenheim, Germany

Manfred Bek