System and method for controlling neutral idle operation of a vehicle

摘要

A control system 32 and method for controlling neutral idle operation of a vehicle 10 is provided. The method includes measuring a brake pressure in a brake control line of vehicle 10. The control line communicates fluid to a brake 128 coupled to a wheel of vehicle 10. The method further includes determining an incline angle of vehicle 10. The method further includes determining a desired brake pressure based on the incline angle. The desired brake pressure is a pressure sufficient to allow the vehicle brakes to maintain vehicle 10 at a predetermined position. Finally, the method includes disengaging a transmission clutch 46 torsionally coupling a vehicle engine 12 to a wheel 24 when the measured brake pressure is greater than the desired brake pressure to initiate neutral idle operation.