Patent Number: 6,253,144

Title: Vehicle longitudinal force control

Abstract: A longitudinal driving/braking force control system for controlling the vehicle speed and/or the headway vehicle-to-vehicle distance is arranged to bring a vehicle to a stop and to hold the vehicle in a stop condition with a stop holding braking force in a predetermined situation. When an accelerator pedal is depressed by a driver in the stop condition, a controller decreases the braking force from the stop holding braking force to zero according to a predetermined brake releasing characteristic to allow a start of the vehicle. In response to a driver's accelerator operation, the controller calculates a driver's input driving force, estimates a grade resistance of the vehicle and further calculates a brake actuation quantity corresponding to the grade resistance. Then, the controller modifies the brake releasing characteristic to ensure a smooth start in accordance with the calculated driver's input driving force, the estimated grade resistance and the calculated brake actuation quantity.

Inventors: Yamamura; Yoshinori (Yokohama, JP), Taniguchi; Ikuhiro (Kanagawa, JP), Akabori; Kouichi (Kanagawa, JP)

Assignee: Nissan Motor Co., Ltd.

International Classification: B60K 31/00 (20060101); B60T 7/12 (20060101); B60T 007/12 (); G06F 007/00 ()

Expiration Date: 06/26/2018