Engine intelligent idling control system and method

Abstract

The invention provides an engine intelligent idling control system and method. The system comprises an engine rotation speed sensor, an accelerator pedal position sensor, a brake pedal position sensor, a gear sensor, a wheel speed sensor, an electronic stabilization controller, a transmission controller and an engine controller. The engine rotation speed sensor is used for acquiring the current rotation speed of an engine. The electronic stabilization controller is used for calculating the real-time vehicle speed according to the wheel speed. The transmission controller is used for calculatingthe current rotation speed of a transmission according to the current gear and the real-time vehicle speed. The engine controller is used for judging the rotation speed difference between the currentrotation speed of the engine and the current rotation speed of the transmission when a vehicle is in a sliding mode and controlling the actual output rotation speed of the engine according to the rotation speed difference. It can be guaranteed that under a sliding working condition, the rotation speeds of input shafts of the engine and the transmission are synchronous.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to an engine intelligent idle speed control system and method under the sliding condition of the automobile. Background technique [0002] In order to reduce fuel consumption, current cars are equipped with a sliding function. Once the coasting function is activated, the system will actively disconnect the power connection between the engine and transmission. When exiting the coasting function, the system needs to re-close the power connection between the engine and the transmission. A series of drivability problems often occur during this closing process, such as the frustration problem under low-speed taxiing and small accelerator conditions and the forward-running problem of the coasting brake, which seriously affect the drivability of the vehicle. [0003] When the car is running, when the driver releases the brake and accelerator at the same time, the whole car will request to ente...

AI Technical Summary

Problems solved by technology

However, when the driver coasts and brakes, the speed of the transmission input shaft decreases rapidly, while the engine is still under high idle control, causing the speed of the engine to be higher than the speed of the transmission input shaft, and the engine will output positive torque to the wheels, causing the vehicle to brake before braking. Phenomenon

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