Method and system for vehicle ESC system using map data

摘要

An Electronic Stability Control (ESC) system for a vehicle is disclosed. An electronic control unit (ECU) is programmed to reduce vehicle lateral skidding by reducing differences between an intended vehicle direction and/or yaw rate and an actual vehicle direction and/or yaw rate by applying modifications to operation of the vehicle brakes and/or throttle. The ESC system receives inputs from wheel speed sensors, a steering wheel position sensor, a yaw rate sensor and a lateral acceleration sensor. The ESC system also receives input that indicates at least a property of the road upon which the vehicle is located, wherein the road upon which the vehicle is located is determined from a positioning system that uses a map database and the property is determined from the map database. The ESC system incorporates the road property information in determining when and/or how to modify operation of the vehicle to reduce vehicle skidding.

主权项

1. An electronic stability control system for a vehicle comprising:
an electronic control unit comprising a processor operable to execute programming functions stored in a memory coupled therewith, wherein said electronic control unit is operably coupled to at least one sensor operative to sense at least one aspect of operation of the vehicle and generate a signal indicative thereof, and further wherein said electronic control unit is operably coupled to a positioning system to receive information indicating the position of the vehicle on the road and a property of the road upon which the vehicle is located that is ahead of the position of the vehicle, and wherein said electronic control unit includes at least one output, each of which is coupled with an actuator operative to control at least one aspect of operation of the vehicle; and a computer program stored in the memory and executable by the processor to cause the processor to receive the signal from the at least one sensor and the information from the positioning system that indicates the property of the portion of the road upon which the vehicle is located that is ahead of the position of the vehicle so as to determine a derived vehicle direction which would result from intended operation of the vehicle and to determine a recovery action to modify a difference between the derived vehicle direction and an actual vehicle direction based upon the extent to which the property of the portion of the road ahead will itself cause a modification of the difference between the derived vehicle direction and the actual vehicle direction.