ACC go-and-stop torque monitoring control strategy

Abstract

The invention provides an ACC go-and-stop torque monitoring control strategy. The ACC go-and-stop torque monitoring control strategy comprises the steps that initial demand torque, cruise torque, electronic stability program (ESP) torque, clutch torque, the transmission ratio and actual torque are obtained; the magnitude of the initial demand torque, the magnitude of the ESP torque and the magnitude of the cruise torque are compared, and final demand torque is calculated by combining the transmission ratio, the clutch torque and the current state of a vehicle; and the magnitude of the final demand torque and the magnitude of the actual torque are compared, and a DFC fault indication module is controlled to be set or reset according to the maintaining state of the magnitude relation betweenthe final demand torque and the actual torque. According to the ACC go-and-stop torque monitoring control strategy, by introducing the ESP torque, the torque monitoring mode of the vehicle in the go-and-stop state is perfected; and judging is further conducted according to the maintaining state of the magnitude relation between the actual torque under the different working conditions of the vehicle and the final demand torque of a driver, the vehicle is prevented from slipping, a monitoring signal is delayed, the influence of signal jump on driving safety of the vehicle is eliminated, and thedriving safety is improved.

Description

technical field [0001] The invention relates to the field of vehicle manufacturing, in particular to an ACC start-stop torque monitoring control strategy. Background technique [0002] When the car needs to stop and go or is in high-speed road conditions, in order to reduce the fatigue of the driver, the car will be allowed to enter the ACC stop and go mode, so that the car can automatically maintain the longitudinal driving of the vehicle. But at this time, in order to ensure the safety of the driver, it is necessary to monitor the torque of the car during driving to prevent driving safety problems. [0003] The torque monitoring is mainly divided into two parts: one part is mainly the calculation of the actual torque and the driver's final demand torque; Correction and adjustment of the actual torque value to meet the normal driving of the car. The other part is mainly to compare the actual torque with the final torque demanded by the driver, so as to further judge wheth...

AI Technical Summary

Problems solved by technology

However, due to the uncertainty of road conditions, such as sudden bumps in the car, the actual instantaneous torque may be greater than the final torque demanded by the driver, which will cause the car to jump forward and cause safety hazards

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