Actuator capable of drive coupling with displacement pump

Abstract

The invention relates to an actuating device (1) for actuating a clutch (3) and / or a transmission (4) of a motor vehicle, the actuating device having a pump (10) and a displaceable actuating element (11), the pump having two Fluid connection (8, 9), the actuating element is in fluid connection with the first fluid connection (8) of the pump (10), wherein the pump (10) is realized in such a way that the pump delivers pressurized fluid in the first pump position conveying in a first conveying direction from the second fluid connection (9) towards the first fluid connection (8) for moving the actuating element (11) out, in the first pump position the pump moves along the first The direction of rotation is driven, wherein the pump (10) is configured as a displacement pump that can be reversed with respect to the delivery direction of the pump, wherein the displacement pump is realized in such a way that it In the second pump position, pressurized fluid is then conveyed from the first fluid connection (8) towards the second fluid connection (9) in a second conveying direction opposite to the first conveying direction for the actuating piston ( 11) Shift in, in the second pump position, the displacement pump is driven in the first direction of rotation, and the clutch (3) and transmission assembly with such actuating means.

Description

technical field [0001] The invention relates to an operating device / actuator for operating a clutch and / or a transmission of a motor vehicle such as a passenger car, a truck, a bus or an agricultural truck, the operating device / actuator has a pump and a A moving actuating element, the pump has two fluid connections, the actuating element is fluidly connected to the first fluid connection of the pump, wherein the pump is designed such that in the first pump position it transfers pressurized fluid in the first delivery direction from the second In the first pump position, the pump is driven in a first direction of rotation, in which the fluid connection leads to a first fluid connection for moving the actuating element out. The invention also includes a clutch having such an actuating device and a transmission assembly (such as a dual clutch transmission) having such an actuating device. Background technique [0002] Corresponding actuating devices in clutch / clutch arrangemen...

AI Technical Summary

Problems solved by technology

Therefore, the energy required for clutch actuation is initially converted into electrical energy at high cost by means of a generator in the drive train or an external pump

Here, large losses arise and all components in the chain must be designed accordingly

[0005] Known electric motor systems therefore have the disadvantage that usually a plurality of electric motors are required and must be controlled

The engine is expensive, requires construction space, and is subject to strong price fluctuations

[0006] The actuation energy is generated hydraulically in known clutches, in which pumps are generally used in principle; however, when using pumps, relatively high power losses often occur in known systems, since the pump is always driving Department

Although this loss can be partly reduced by suction throttling or by-passing, these known systems are usually rather complicated to implement.

As a result, known hydraulic systems can have rather high power losses and complex valve couplings

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