A shift by wire electric selector control system for a motor vehicle transmission

摘要

A shift by wire electric selector control system 12 for an automatic transmission having five operating modes, Park mode, Drive mode, Neutral mode, Sport mode and Reverse mode has a multi-stable rotary selector 17 which is operable by the driver of the vehicle to select a respective one of the operating modes of the transmission. The vehicle includes a keyless entry system K which has an electronic ignition control module 14 for selectably turning the ignition of the engine on or off in response to activity of an On/Off switch 13. An electronic transmission selector (ETS) 20 senses the selected mode position of the selector 17 and sends a command to the transmission. The multi-stable rotary selector 17 further includes selector drive means 22 which are controlled by the ETS 20 to automatically move the multi-stable selector 17 to Park mode when a shutting-off of an engine by the On/Off switch is detected. The automatic motion of the selector 17 is prevented over a predetermined period when the selector 17 is in Neutral mode before a shutting-off of the engine by the On/Off switch 13.