Fluid-operated regulating apparatus and method of using the same
First Claim
1. A fluid-operated control apparatus for use in a motor vehicle, comprising at least one fluid displacing and pressurizing machine arranged to supply at least one flow of pressurized fluid along a predetermined path to at least one consumer of a motor vehicle;
- adjustable fluid pressure regulating valve means in said path, said valve means including a proportional valve; and
control means for modulating current amplitude of said valve means as a function of at least one variable control parameter, said at least one control parameter being generated by a plurality of components, one of said components being modulated at a first frequency and another of said components being modulated at a second frequency.
4 Assignments
0 Petitions
Accused Products
Abstract
A fluid-operated regulating apparatus for use in a motor vehicle, particularly to control the operation of a consumer, such as a clutch which transmits torque between an engine and a transmission in the power train of a vehicle as a function of one or more parameters, comprises at least one pump which supplies a flow of pressurized hydraulic or pneumatic fluid to the consumer by way of a valve controlled by an electronic unit which receives signals from a plurality of sensors. The signals which the electronic unit transmits to the valve are dependent upon at least one variable parameter which is generated by a plurality of components. One of these components is modulated or modulatable at a first frequency, and another of these components is modulated or modulatable at a second frequency which can be higher or lower than the first frequency. This reduces the likelihood of pronounced knocking or chatter of a reciprocable valving element of the valve against its seat and ensures an optimal reduction of hysteresis within the entire operating range of the consumer.
20 Citations
31 Claims
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1. A fluid-operated control apparatus for use in a motor vehicle, comprising at least one fluid displacing and pressurizing machine arranged to supply at least one flow of pressurized fluid along a predetermined path to at least one consumer of a motor vehicle;
- adjustable fluid pressure regulating valve means in said path, said valve means including a proportional valve; and
control means for modulating current amplitude of said valve means as a function of at least one variable control parameter, said at least one control parameter being generated by a plurality of components, one of said components being modulated at a first frequency and another of said components being modulated at a second frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
- adjustable fluid pressure regulating valve means in said path, said valve means including a proportional valve; and
- 26. A method for operating a fluid-operated control apparatus for use in a motor vehicle, said control apparatus including at least one fluid displacing and pressurizing machine arranged to supply at least one flow of pressurized fluid along a predetermined path to at least one consumer of a motor vehicle, and a magnetic proportional valve in said fluid path having a winding for modulating current amplitude of said magnetic proportional valve as a function of at least one variable parameter, comprising the step of generating the parameter by a plurality of components having different frequencies.
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29. A fluid-operated regulating apparatus for use in a motor vehicle comprising at least one fluid displacing and pressurizing machine arranged to supply at least one flow of pressurized fluid along a predetermined path to at least one consumer of a motor vehicle;
- adjustable valve means disposed in the path for a flow of a pressurizable fluid in a predetermined direction and including a proportional valve having at least one mobile valving element arranged to vary the fluid pressure;
at least one sensor arranged to generate signals denoting the pressure of fluid in said path; and
means for regulating the current amplitude of the pressure of fluid in said path. - View Dependent Claims (30, 31)
- adjustable valve means disposed in the path for a flow of a pressurizable fluid in a predetermined direction and including a proportional valve having at least one mobile valving element arranged to vary the fluid pressure;
Specification