Kelsey-hayes Company

Charles Darnell

Edward Nelson Fuller

Richard J Barron

Gerald M Sivulka

Gregory P Campau

Paul M Schliebe

Edward R Hornback

Clark E Lowman

Hydraulic or electro-hydraulic braking systems which include at least one wheel braking device and micro-machined technology, such as microvalves, are described herein. The use of the microvalves helps to eliminate audible noise produced in the hydraulic systems as well as allows for reduced package size of the system. In particular, many of the braking systems described herein have Anti-lock Braking System (ABS) capabilities, and as such employ apply microvalves, dump microvalves and changeover microvalves. The microvalves may be digitally or proportionally controlled for selectively controlling the pressure supplied to the wheel brake cylinders.

Vehicle hydraulic braking systems incorporating micro-machined technology

A plurality of pressure sensors are carried in housing mounted upon a hydraulic control valve for an electro-hydraulic brake system. The pressure sensors are electrically connected to a signal conditioning circuit which also is mounted upon the hydraulic control valve. The signal conditioning circuit samples the sensors and mulitplexes the sensor signals into a single output signal.

Structure for mounting a cluster of pressure sensors upon an electro-hydraulic brake system control unit

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Ypsilanti, MI, United States of America

Charles Darnell