Patent ID: 6817966
Filing Date: 2004-11-16
Classification: F16H,Y10T

Abstract:
A brake shift interlock system for a vehicle having a transmission shift lever moveable between a park and a non-park position and a brake pedal movable between a released and a depressed position, the system comprising:a shift solenoid having an energized and a de-energized state, said shift solenoid being a mechanical stop of movement of the transmission shift lever from the park position when in said de-energized state; a park position sensor for sensing whether the transmission shift lever is in the park position; a brake pedal position sensor for sensing whether the brake pedal is in the depressed position; and a latch and driver circuit electrically connected to the shift solenoid, the park position sensor, and the brake pedal position sensor, the latch and driver circuit initially energizing the shift solenoid when: (a) the park position sensor senses that the transmission shift lever in the park position and (b) the brake pedal position sensor senses that the brake pedal is in the depressed position, said latch and driver circuit continuously energizing the shift solenoid as long as the brake pedal position sensor senses that the brake pedal is in the depressed position regardless of further indications from park position senor, the latch and driver circuit de-energizing the shift solenoid when the brake pedal position sensor senses that the brake pedal is no longer in the depressed position regardless of further indications from the park position sensor.