IMPROVED PARK POSITION LOCKING SYSTEM FOR AUTOMATIC TRANSMISSION SHIFTER

摘要

This invention is an improved park position locking system for controlling the conditions for removing an automatic transmission gearshift 90 from a PARK position. An electronic system controller 30 and the transmission controller 16 are engaged to a common data bus 18. Vehicle control system 10 comprises the electronic system controller ESC 30, which is the primary component of a vehicle electronic control system. ESC 30 manages and communicates with a number of vocational controllers disposed on a vehicle 13 and executes a load management program which oversees the total load imposed on the vehicle electrical system and power train by various accessories installed on the vehicle 13. Such communication is by a standard communication protocol that may be the SAE J1939 protocol over the common data bus 18. The ESC 30 is programmed to ensure that an operator of the vehicle may not move the gearshift 90 out of a PARK position without first depressing a service brake pedal. The ESC 30 prevents or allows movement of the gearshift through a solenoid operated locking mechanism engaged to the gearshift 90.