Robert Boschgmbh

Wolfgang Bullmer

Hong Zhang

Martin Streib

Kurt Neuffer

Klemens Kronenberg

Herbert Ott

Richard Schottle

The invention is directed to a method for controlling the gear-shifting comfort in motor vehicles having automatic transmissions. The method provides for pressure controllers for controlling clutches affecting the gear-shifting operations of the transmission. The preset values for the torque and/or the torque curves of the clutches are stored in dependence upon the particular gear-shifting operations and the transmission rpms in a characteristic field. The actual acceleration of the motor vehicle is detected with the aid of an acceleration sensor and a very low desired acceleration is used as a guide quantity for the torque control at the clutches. The preset values for the clutches corrected by this control are stored in the characteristic field.

Method for controlling the shifting comfort in motor vehicles having an

The invention is directed to a method for adjusting the hydraulic pressure actuating at least one clutch of an automatic transmission. The hydraulic pressure is pregiven only by one pressure controller and the automatic transmission coacts with the motor which is especially a drive motor of a motor vehicle. The pressure supplied by the pressure controller is determined in dependence upon the trace of a pregiven motor desired torque.

Method of actuating an automatic transmission

Arrangement of controlling the output torque of an automatic transmission

The invention is directed to an arrangement for the current-regulated control of several actuators by a control computer. An individual control transistor is provided for each actuator. A single measuring resistor in series with a further control transistor defines a measuring and control arrangement for all actuators. Each individual control transistor for the respective individual actuators is connected in series with respective resistors. The resistance value of each of the resistors corresponds to the resistance value of the measuring resistor. Furthermore, switching elements are provided and controlled by the control computer. The actuators are connected in series with the measuring and control arrangement for a pregiven measuring and control time by the switchover elements. The actuators are normally in series with the individual control transistors assigned thereto. A control-signal sequence is supplied to each of the control transistors with the control-signal sequences being adjusted at the ancillary control transistor during the pregiven measuring and control time for the actuator corresponding thereto. In this way, an individual current control for a large number of actuators is possible with a single measuring resistor. The control operations all take place in the control computer and no separate analog control circuits are required.

Arrangement for providing a current-regulated control of several

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Bietigheim-Bissingen, Germany

Wolfgang Bullmer