Patent ID: 6158417
Filing Date: 2000-12-12
Classification: F02D

Abstract:
A throttle for an internal combustion engine air intake comprising a throttle body having a through-bore extending along a longitudinal axis for conducting intake flow from an upstream direction toward a downstream direction, a throttle mechanism for controlling flow through the through-bore and comprising a shaft and an electric motor actuator for turning the shaft to selectively throttle flow through the through-bore; the throttle body further comprising a by-pass air passage for by-passing a region of the through-bore that within which the throttle mechanism throttles the flow, the by-pass air passage comprising an entrance open to the through-bore upstream of the region within which the throttle mechanism throttles the flow and an exit open to the through-bore downstream of the region within which the throttle mechanism throttles the flow, and in which the electric motor actuator has an operative association with the by-pass air passage such that flow through the by-pass air passage cools the electric motor actuator.