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Clutch actuation device

  • US 4,796,739 A
  • Filed: 06/17/1987
  • Issued: 01/10/1989
  • Est. Priority Date: 09/10/1986
  • Status: Expired due to Fees
First Claim
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1. A clutch actuation device for a vehicle comprising an actuating operative element to engage and disengage a clutch (3) in response to output signals from an electronic control unit (28), a clutch pedal (18), a first sensor (17) which determines an extent of depression of said clutch pedal (18) and sends a measurement signal whose magnitude depends on the position of said clutch pedal (18) to the electronic control unit (15), a further sensor (19), which sends another measurement signal to the electronic control unit (15) which depends on the position of a clutch actuation element (5) of said actuating operative element, said electronic control unit (15) produces an output signal depending upon a set value input associated with said first sensor (17) and by a second actual value input associated with said further sensor (19), which output signal is directed to a fluid pressure control valve (9), and said vehicle is equipped with a brake locking protection control system (LPCS) controllable via a regulating unit (28), which includes a signal transmission device which, when a brake locking protection function is present, supplies an additional signal produced in the regulating unit (28) to said electronic control unit (15) and in response thereto, said control valve 9 is switched to permit fluid flow to operate a piston of said clutch actuation element (5) which disengages said clutch (3) in which, upon simultaneous receipt of a measurement signal from said sensor (17) and an additional signal from said regulating unit (28), said electronic control unit (15) forms an output signal which is the same as it would form if only the additional signal from the regulating unit (28) were present.

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