Brake-transmission shift interlock device for an automatic transmission system

摘要

A brake-transmission shift interlock device 10 for an automatic transmission system includes a solenoid 14 secured to a support member 12 that positions the solenoid 14 so as to block movement of a transmission member 176 to prevent a transmission shifter from being moved from a park position. The solenoid 14 includes a plunger 50 having first and second portions 76 and 78. The second plunger portion 78 engages the transmission member 176 laterally on a side wall 94 if the brake pedal is not depressed and the shifter is in the park position. To prevent the plunger 50 from binding, the second plunger portion 78 is allowed to axially offset from the first plunger portion 76 thereby reducing the required lineal force to move the plunger 50 from a first to a second position when the solenoid 14 is energized.