Park inhibition solenoid assembly

Abstract

A Park inhibition solenoid assembly for preventing the undesirable shifting of a transmission from an out-of-Park mode to a Park mode includes a follower and an armature slidably disposed within a valve body / housing and within a solenoid. The follower is moveable between an out-of-Park position and a Park position and the armature is moveable between an unlocked position and a locked position. The follower and armature include detents for supporting a bearing. The armature and bearing prevent the follower from moving from the out-of-Park position to the Park position when the armature is held in place in the lock position by the solenoid.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 015,690, filed December 21, 2007. The disclosures of the aforementioned applications are incorporated herein by reference. technical field [0003] The present invention relates generally to a park inhibit solenoid assembly for a motor vehicle, and more particularly to a park inhibit solenoid assembly having a locking collar to prevent the motor vehicle from switching into a park mode. Background technique [0004] The statements in this section merely provide background information related to the present disclosure and may or may not constitute prior art. [0005] A typical multi-speed transmission uses a combination of torque-transmitting devices and gear sets to achieve multiple driving modes, including multiple out-of-park driving modes and a park mode. The non-parking driving modes generally include a forward gear or speed ratio (ie, drive ...

AI Technical Summary

Problems solved by technology

While the typical park inhibit solenoid is useful for its intended purpose, the use of ETRS systems in applications with greater fluid pressure and forces, such as trucks and sport utility vehicles, requires enhanced protection against park mode failure. Ability to wish to engage

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