US 5,850,898 A · Method and device for the hydraulic actuation of a clutch, especially for automobiles

Abstract

A method and a device for the hydraulic actuation of a clutch operatively connected to a clutch receiver cylinder (6), especially for automobiles, are disclosed, in which, in a servo circuit (S), a servo pressure is generated, which serves for the hydraulic governing of a clutch transmitter cylinder (2), in order to generate in a pressure circuit (D) a working pressure, which is applied to the clutch receiver cylinder (6), or is applied directly to the clutch receiver cylinder (6), in order to create there a force required for disengaging the clutch. According to the invention, the servo pressure for disengaging and engaging the clutch is adjusted in defined manner in the servo circuit (S), for which purpose the servo circuit (S) comprises a proportional valve (8, 8'). As a result, with technical equipment at low cost, an automated actuation with improved response and operational behaviour of the clutch is made possible. Furthermore, a method and a device for gear-shifting a mechanical gear are disclosed, in which the servo pressure of the clutch disengagement is used for shifting the clutch sleeves of the mechanical gear.

Claims18

Dependent claims

An improved method for hydraulically actuating of an automobile clutch so that the clutch may be tuned, in an optimum manner, to at least one selected operating characteristic of the automobile;

where the clutch is operatively connected with power circuit, which includes a clutch receiver cylinder that is actuable by the application thereto of a working pressure fluid having a preselected pressure;
and where the automobile includes an engine, the method comprising the steps of:
providing a source of working pressure fluid having variable pressure, including the preselected pressure, and including generating a servo pressure fluid in a servo circuit where the pressure of the servo pressure fluid is proportional to a preselected operating characteristic of the automobile;
and
applying working pressure fluid, which has the preselected pressure, to the clutch receiver cylinder for actuating the clutch receiver cylinder in response to generation of the servo pressure fluid in the servo circuit.

2 more elements

An improved system for the hydraulic actuation of an automobile clutch such that clutch activation may be tuned, in an optimum manner, to at least one selected operating characteristic of the automobile and where the automobile includes an engine, the system comprising:

a power circuit;
a servo circuit operatively connected with the power circuit;
a clutch receiver cylinder that is in the power circuit, that is operatively connected with the clutch, and that is selectively actuable by the application thereto of a working pressure fluid having a preselected pressure;
means for providing a source of working pressure fluid having varying pressures, which pressures include the preselected pressure, and including means for generating pressure in a servo pressure fluid in the servo circuit, with the pressure of the servo pressure fluid being proportional to a selected operating characteristic of the automobile;
and
means for applying working pressure fluid, having the preselected pressure, to the clutch receiver cylinder for activation of the clutch receiver cylinder in response to generation of the servo pressure fluid in the servo circuit.

3 more elements

Dependencies are inferred from the claim text.

Method and device for the hydraulic actuation of a clutch, especially for automobiles

Life of this patent

Method and device for the hydraulic actuation of a clutch, especially for automobiles

Life of this patent

Abstract

Claims18