Borgwarner Inc.

Coltec Industries, Inc.

Gary W Kotchi

Michael J Halsig

A fail-safe throttle positioning device is disclosed for an engine induction system. A throttle body is provided having a fluid passage. A movable throttle valve is disposed within the fluid passage for at least idle speed control. An actuator mechanism is connected to the throttle valve for operably moving the throttle valve between a minimum fluid flow position and a maximum fluid flow position. A fail-safe mechanism urges the throttle valve toward an intermediate position between the minimum and maximum fluid flow positions to prevent inoperability of the engine during failure of the actuator mechanism.

Fail safe throttle positioning system

The subject invention is a throttle body for an intake manifold of a spark ignition internal combustion engine. The throttle body includes a throttle plate member comprising a shaft, a throttle plate and a lever. The throttle plate member is integrally molded as one piece from an engineering resin. The throttle body also includes an air intake portion and an air discharge portion. Either the air intake or the air discharge portions may be integrally attached to the intake manifold prior to assembly of the throttle plate member.

Injection molded throttle body

An injection molded throttle body having a one-piece lever shaft and plate which is installed as a single piece unit in a laterally split throttle body housing.

Growing community of inventors

Shelby Township, MI, United States of America

Gary W Kotchi