Method to shut off adaptive cruise control when the uphill gradient is too steep

摘要

A method of controlling an adaptive cruise control (ACC) system of a vehicle. The method including determining a torque of an engine of the vehicle, determining a torque of a transmission of the vehicle, calculating an idle force of the vehicle, obtaining a maximum tolerable gradient, obtaining an actual gradient of a surface the vehicle is on, and turning off the adaptive cruise control when the actual gradient exceeds the maximum tolerable gradient.

主权项

1. A method of controlling an adaptive cruise control (ACC) system of a vehicle by a controller, the method comprising:
determining, by the controller, a torque of an engine of the vehicle; determining, by the controller, a torque-ratio of a transmission of the vehicle; calculating, by the controller, an idle force of the vehicle from the torque of the engine and the torque-ration of the transmission; determining, by the controller, a maximum tolerable gradient using the formula:
F_hill=F—idle+vehiclemass* a_tolerableRollback where F_hill is the maximum tolerable gradient, F_idle is the idle force of the vehicle, vehiclemass is a mass of the vehicle and contents, and a_tolerableRollback is a maximum tolerable rollback acceleration; obtaining, by the controller, an actual gradient of a surface the vehicle is on; and turning off the adaptive cruise control when the actual gradient exceeds the maximum tolerable gradient.