Thomas D Sherman

US Patent:

7207921, Apr 24, 2007

Filed:

Sep 13, 2004

Appl. No.:

10/939552

Inventors:

Aaron C. Heckel - South Lyon MI, US
Thomas M. Sherman - Pinckney MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F16H 59/60

US Classification:

477 97, 477156

Abstract:

A vehicle having an engine that drives a transmission includes a pump that provides fluid to the transmission and a temperature sensor that monitors a temperature of the fluid. The temperature sensor generates a temperature signal. A control module receives the temperature signal and operates the pump to provide the fluid at a first pressure when the temperature signal is below an upper temperature limit. The control module operates the pump to provide the fluid at a second pressure when the temperature signal is above the upper temperature limit.

US Patent:

20150274174, Oct 1, 2015

Filed:

May 30, 2014

Appl. No.:

14/291501

Inventors:

- Detroit MI, US
RICHARD L. TIBERG - MILFORD MI, US
THOMAS M. SHERMAN - PINCKNEY MI, US
DAVID WILLIAM MINNER - PINCKNEY MI, US
HUALIN TAN - NOVI MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

B60W 40/076
B60W 40/107

Abstract:

A system according to the principles of the present disclosure includes a longitudinal acceleration estimation module, a vehicle longitudinal acceleration sensor, a road grade estimation module, and an actuator control module. The longitudinal acceleration estimation module estimates a longitudinal acceleration of a vehicle based on at least one of a transmission output speed and a wheel speed. The vehicle longitudinal acceleration sensor measures the longitudinal acceleration of the vehicle. The road grade estimation module estimates a grade of a road on which the vehicle is traveling based on the estimated longitudinal acceleration and the measured longitudinal acceleration. The actuator control module controls an actuator of the vehicle based on the estimated road grade.