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AssigneeLuK Getriebe-Systeme GmbH
InventorsLudger Holtmann, Michael Reuschel, Manfred Homm, Ari Ojamies
Estimating the term…
A fluid pressure regulating valve, particularly for an automated clutch in the power train of a motor vehicle with a manually shiftable transmission, is adjustable by an electronic control unit which regulates the strength of alternating current being supplied to one or more electromagnets of the valve. The control unit receives signals from sensors which monitor the fluid pressure, the temperature and/or the RPM of one or more constituents of the motor vehicle, and such signals are processed into signals denoting differences between existing and desired pressures of fluid being supplied to and/or by the valve. These signals are compared with information stored in at least one memory of the control unit and denoting memorized differences between actual and desired current strengths. The memorized signals are altered when a comparison in the control unit indicates that the differences ascertained on the basis of signals transmitted by the sensors depart from differences denoted by the memorized information. Such processing of memorized information renders it possible to counteract the effects of wear upon and/or tolerances in assembly of parts of the power train.
A method of conforming to varying parameters a selected electric control current which is being supplied to a fluid pressure regulating valve and is memorized with additional control currents as a desired control current in and is withdrawable from a characteristic field in a memory, in dependency upon prevailing operating conditions, to serve as an actual control current, comprising the steps of:
An apparatus for generating an electric control current for at least one fluid pressure regulating valve and adapting said control current to varying parameters, said apparatus comprising:
Dependencies are inferred from the claim text.