Gm Global Technolgoy Operations, Inc.

James A Cogswell, Ii

James L Coulter

Bryan R Snyder

Mark A Theobald

John P Miller

Donald E Malen

David R Lancaster

Mark G Kosowski

David J Freiman

An internal combustion engine's start-up torsional disturbances are reduced by drawing down intake manifold pressure prior to engine cranking. In a preferred arrangement, a secondary air injection reaction pump is adapted for evacuating the intake manifold to effect the desired draw down of the intake manifold pressure.

Method and apparatus for engine torque disturbance reduction during cranking

The present invention provides an apparatus and method of utilization thereof of a traction control system for automotive vehicles. The inventive traction control system provides selective hydraulically actuated braking to the drive wheel which is spinning to restrain rotation thereof so that torque to that respective wheel may be increased.

Anti-spin hydraulic brake system

The present invention provides an apparatus and method of utilization thereof of a traction control system for automotive vehicles. The inventive traction control system provides selective hydraulically actuated braking to a drive wheel which is spinning to restrain rotation thereof so that torque to that respective wheel may be increased.

A mount is disclosed mounting an internal combustion engine in a unitized vehicle body. The mount comprises an intermediate mass which is independent of the vehicle structure and the powertrain and is adapted to be frequency tuned. Separate elastomeric bodies couple the intermediate mass to the vehicle structure and to the powertrain and the intermediate mass is predetermined in combination with the elastomeric characteristics of the coupling bodies so as to resonate at a frequency within an uncoupled intermediate frequency range such that the transmissibility of the mount is attenuated substantially throughout a high frequency range to reduce vehicle structure noise caused by the engine's combustion process while satisfying other transmissibility criteria at the lower frequencies. In another embodiment, a portion of the intermediate mass is isolated and sprung from the remainder and the resonant intermediate mass frequencies are tuned to have substantially different peaks to further reduce the magnitude of the transmitted force at resonance while still attenuating the high frequency engine combustion caused vibrations.

Growing community of inventors

Clarkston, MI, United States of America

James A Cogswell, Ii