Charles K Darnell

US Patent:

6533366, Mar 18, 2003

Filed:

Feb 1, 2000

Appl. No.:

09/496104

Inventors:

Richard J. Barron - Ann Arbor MI
Edward N. Fuller - Manchester MI
Gerald M. Sivulka - Ann Arbor MI
Gregory P. Campau - Plymouth MI
Charles Darnell - Ypsilanti MI

Assignee:

Kelsey-Hayes Company - Livonia MI

International Classification:

B60T 831

US Classification:

3031131, 310307, 251 11

Abstract:

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.

US Patent:

60194375, Feb 1, 2000

Filed:

May 29, 1997

Appl. No.:

8/865466

Inventors:

Richard J. Barron - Ann Arbor MI
Edward N. Fuller - Manchester MI
Gerald M. Sivulka - Ann Arbor MI
Gregory P. Campau - Plymouth MI
Charles Darnell - Ypsilanti MI

Assignee:

Kelsey-Hayes Company - Livonia MI

International Classification:

B60T 834

US Classification:

3031131

Abstract:

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.

US Patent:

63120615, Nov 6, 2001

Filed:

Nov 24, 1999

Appl. No.:

9/448116

Inventors:

Paul M. Schliebe - Dexter MI
Charles Darnell - Ypsilanti MI
Edward R. Hornback - Dexter MI
Clark E. Lowman - Ann Arbor MI

Assignee:

Kelsey-Hayes Company - Livonia MI

International Classification:

B16T 1366

US Classification:

303 20

Abstract:

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.