Hiep T Do

US Patent:

7343241, Mar 11, 2008

Filed:

May 11, 2006

Appl. No.:

11/432455

Inventors:

Ananth Krishnan - Ypsilanti MI, US
Pascal Tissot - Gerstheim, FR
Hiep T. Do - West Bloomfield MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

B60T 7/12
B60Q 1/00

US Classification:

701113, 3404255, 180271

Abstract:

An engine start security control system for a vehicle having a transmission that is driven by an engine includes a first module that generates a first engine start flag based on an internal mode switch (IMS) signal and a second module that generates a second engine start flag based on a modified IMS signal. A third module selectively generates an engine start allow signal based on the first and second engine start flags.

US Patent:

7363138, Apr 22, 2008

Filed:

Oct 9, 2003

Appl. No.:

10/601063

Inventors:

Herve Scelers - Illkirch-Graffenstaden, FR
Paul A. Bauerle - Fenton MI, US
Ruobai Zhang - Ann Arbor MI, US
Craig J. Hawkins - Milford MI, US
Hiep T. Do - West Bloomfield MI, US
Timothy J. Keenan - Clarkston MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

G06F 17/00

US Classification:

701 82, 701 90, 180197, 303139

Abstract:

A method of controlling traction in a vehicle having at least one non-driven wheel speed sensor. Actual vehicle acceleration and a wheel speed difference are detected. At least one of the actual vehicle acceleration and the wheel speed difference is compared to at least one of a predetermined vehicle acceleration and a predetermined wheel speed difference to detect vehicle wheel slip. A wheel torque is reduced in response to detected wheel slip. The foregoing method allows traction control to be installed in many types of vehicles, including vehicles without ABS. More than one type of wheel slip detection can be implemented, and various types of wheel slip can be detected.