Paul L Jordan

US Patent:

6909285, Jun 21, 2005

Filed:

Sep 11, 2002

Appl. No.:

10/241101

Inventors:

Paul Thomas Jordan - Lincoln Park MI, US
John Harry Floros - Novi MI, US

Assignee:

Visteon Global Technologies, Inc. - Van Buren Township MI

International Classification:

F02P017/00

US Classification:

324382, 324418

Abstract:

A method for detecting failure of a relay operating in a vehicle having an ignition switch, a power supply, a capacitor, and a pre-charge circuit to pre-charge the capacitor with the relay switching power from the power supply to the pre-charged capacitor, the method comprising the steps of: performing a capacitor pre-charge test; and performing a capacitor discharge test. Preferably, the capacitor pre-charge test is performed when the ignition is switched ON and the capacitor discharge test is performed when the ignition is switched OFF.

US Patent:

6914543, Jul 5, 2005

Filed:

Jun 3, 2002

Appl. No.:

10/160862

Inventors:

John H. Floros - Novi MI, US
Nick Sarafopoulos - Taylor MI, US
Paul T. Jordan - Lincoln Park MI, US

Assignee:

Visteon Global Technologies, Inc. - Dearborn MI

International Classification:

H03M001/22

US Classification:

341 2, 341 11, 341 35

Abstract:

A method for detecting an absolute rotational position of an electromechanical device or the at least one component thereof comprising determining a first absolute position of the electromechanical device or the at least one component thereof based on a commutation index signal, obtaining a Z-index signal, and determining a second absolute position of the electromechanical device or the at least one component thereof based on the Z-index signal. The method initially determines a coarse rotational position of the electromechanical device such as a rotor or steering wheel based on the commutation index signal. When a device's position is first initialized by a commutation index signal before the Z-index pulse is detected, the device's position is re-initialized upon detection of the Z-Index pulse to provide a more accurate absolute device rotational position.