Gm Global Technolgoy Operations, Inc.

William S Bowers

Daniel J Richardson

Thomas M Herman

Carlen E Larson

The air/fuel ratio of an engine during its open loop fuel controlled warm up period is established by one schedule while the vehicle automatic transmission is in drive and established by another schedule while the vehicle automatic transmission is in neutral.

Engine air/fuel ratio controller

An electromagnetic solenoid incorporating a plunger return mechanism comprising a spring retainer non-rotatably fitted to the plunger, and a spring held in compression between the retainer and a coil wound bobbin disposed about the plunger. The spring is held non-rotatable with respect to the bobbin and the plunger, and the plunger is non-rotatable with respect to the bobbin so that the spring cannot unwind with respect to the spring retainer.

Growing community of inventors

Grand Blanc, MI, United States of America

William S Bowers