Method for regulating a clutch or a brake in a transmission
AssigneeZF Friedrichshafen AG
InventorsThomas Rossmann, Friedrich Tenbrock, Dieter Neumann
Life of this patent
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Abstract
The invention relates to a method for regulating an electrohydraulically controlled clutch or a brake of a transmission. According to the invention, the clutch or brake is regulated using a model-based compensation pressure regulator with the help of an observation unit, whereby the compensation-pressure control circuit contains a non-linear compensation element which corresponds to the inverse model of the control system of the coupling or brake. The observation unit estimates interference levels of the clutch regulation from a drive chain model, according to a condition-estimation procedure.
Claims13
A method for regulating an electrohydraulically controlled clutch and brake with a control system for a clutch or brake of a transmission, the method comprising the steps of:
- regulating the clutch or brake using a model-based compensation pressure regulator with the aid of an observation unit;
- providing an electronic control loop of said compensation pressure regulator containing a non-linear compensation value which corresponds to an inverse model of the control system for the clutch or brake;
- and
- estimating using said observation unit, interference levels of the clutch regulation on the basis of a drive train model according to a condition-estimation procedure.
A method for regulating an electrohydraulically controlled clutch and brake with a control system for a clutch or brake of a transmission, the method comprising the steps of:
- regulating the clutch or brake using a model-based compensation pressure regulator with the aid of an observation unit;
- providing an electronic control loop of said compensation pressure regulator containing a non-linear compensation signal which corresponds to an inverse model of the control system for the clutch or brake;
- estimating using said observation unit interference levels of the clutch regulation on the basis of a drive train model according to a condition-estimation procedure;
- and
- providing in said electronic control loop a controller that generates a working point independent control variable on the basis of measured signals, setpoint assignments of the measured signals, calculated values of the inverse model of the control system of the clutch or brake, ad at least one estimated value of the observation unit.
Dependencies are inferred from the claim text.