| 摘要 |
<p>The invention relates to an arrangement for automatic control of a hydraulically operated friction disc clutch (60) with diaphragm spring (64). The hydraulic operating unit comprises a hydraulic cylinder which, by acting on the diaphragm spring (64), disengages the friction disc clutch. In order to obtain a hydraulic operating unit in which the regulating pressure is proportional to the disengagement degree of the clutch, the hydraulic cylinder comprises a proportionality-forming spring (13) which acts against the hydraulic cylinder piston (4) during the final part of the disengagement stroke of the piston. In a system with master cylinder (1) and slave cylinder (61), where the slave cylinder acts on the diaphragm spring for disengagement of the friction disc clutch, the master cylinder is also provided with a pressure supply, compensating for wear of the discs, via a hydraulic channel (7) which is closed off at a predetermined regulating pressure level. The invention permits a simplified system solution for an automated diaphragm spring clutch in a vehicle, where the clutch does not require any positional sensors, but the disengagement degree is given by the hydraulic regulating pressure.</p> |
