A high-speed start-stop function switch prompting method and device

Abstract

The invention relates to the technical field of new energy vehicles, in particular to a prompting method and device for a high-speed start-stop function switch. By obtaining the operating parameters and driving operation data of the vehicle in the sampling period, determine the road condition information according to the operating parameters, determine the driving style according to the driving operation data, and further judge whether it is suitable to open or close the high-speed start-stop function according to the road condition information and driving style. And when it is suitable to turn on or off the high-speed start-stop function, the operation prompt information will be displayed in time to remind the driver to perform the switching operation of the high-speed start-stop function. The present invention determines whether to enable the high-speed start-stop function based on the current operating data of the vehicle and the driving operation data of the driver, taking into account the operating state of the vehicle itself and the operating requirements of the driver, and can improve the driver's driving experience and fuel economy, reduce the Requirements for professional knowledge and improve operational convenience.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a prompting method and device for a high-speed start-stop function switch. Background technique [0002] In traditional fuel vehicles, after the driver releases the accelerator pedal, the transmission chain remains in a combined state, the engine enters a fuel-cut state, and the vehicle enters a coasting state. The economy is poor, and the engine is running during taxiing, which makes the noise loud. In order to solve this problem, the start-stop function is generally applied when the vehicle is coasting at high speed, that is, when the driving conditions and vehicle conditions are met, the engine controller requests the gearbox to open the clutch and stop the engine to make the coasting distance longer to save fuel; When driving conditions or vehicle conditions are not satisfied, the engine is started to restore power. However, no matter whether it is a clutch star...

AI Technical Summary

Problems solved by technology

However, due to the great defects of these two starting methods, the traditional fuel vehicles on the market do not have the application of starting and stopping at high speeds.

For example, when the engine is shut down and the vehicle is coasting, if the driver suddenly steps on the accelerator, it means that the driving force needs to be restored immediately. If the clutch is used to start, part of the kinetic energy of the vehicle needs to be consumed by the engine backwards, so that after the driver suddenly steps on the accelerator, The vehicle not only does not accelerate but continues to decelerate for a period of time; if the starter is used to start, because the speed driven by the starter is very low, it takes a long time for the engine to start successfully, and after the start is completed, the engine itself needs to respond to driving by adjusting the throttle. The torque request from the driver or the gearbox makes the speed rise, and the gearbox presses the clutch to restore power to the vehicle when the speed is synchronized. During this process, the vehicle has not reflected the driver's acceleration demand; Changing the intention needs to start the engine to drive. At this time, the engine must be stopped and then started by the starter, which also violates the driver's intention. These situations have great safety risks, thus making it impossible to start and stop at high speeds for traditional fuel vehicles.

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