Integrated throttle body and intake manifold spacer module for internal combustion engine air intake, includes slot having straight segment and semicircular segment, associated with tail of throttle mechanism torsion spring

摘要

The throttle body has a body part (62) containing an upstream portion of a through-bore (68) and a second body part (64) containing a downstream portion, joined together at respective confronting faces of the two body parts. A throttle mechanism can be captured between the two body parts. The mechanism includes a torsion spring (78) external to the through-bore having tails respectively associated with a slot having a straight segment and a semicircular segment in the exterior of the throttle body; and a cam on the shaft for spring-biasing a throttle blade disposed within the through-bore to closed position. A gasket provides sealing between the body parts and may provide sealing between the body parts and bearings for a spindle which carries the blade.