Brake control method, device, device and storage medium

Abstract

The present invention provides a braking control method, device, device and storage medium. The method includes: when it is determined that the engine is in a braking condition, acquiring the current speed of the engine; determining whether the current speed is greater than a preset critical speed, The critical speed is the critical speed between the low-medium speed zone and the high-speed zone, the speed in the low-medium-speed zone is the braking speed commonly used by users, and the speed in the high-speed zone is not less than the speed in the low-medium-speed zone. Maximum speed; if not, control the air release opening of the supercharger to be zero; if yes, control the air release opening of the supercharger to adjust to the first opening value, where the first opening value is greater than the second opening degree value, the first opening value is the bleed air opening corresponding to the current speed when the engine is in the braking condition, the second opening value is the bleed opening corresponding to the current speed when the engine is in the positive power condition, and the third An opening value greater than zero. This case can realize variable adjustment of braking power, thereby improving the reliability of the engine.

Description

technical field [0001] The present invention relates to the technical field of engines, and in particular, to a braking control method, device, device and storage medium. Background technique [0002] At present, more and more vehicles are using supercharged engines. The working principle of an engine equipped with a supercharger is: the exhaust gas generated by the combustion of oil and air in the engine cylinder is output to the supercharger, and the supercharger is driven by the exhaust gas, so that the supercharger compresses the new air, And send the compressed air into the cylinder. Among them, a bypass valve is provided on the supercharger. By adjusting the opening of the bypass valve, that is, the opening of the supercharger, the exhaust gas output from the cylinder can be partially discharged, so as to adjust the intake of the cylinder. air volume to adjust the power of the engine. [0003] In the prior art, when the engine is in a positive power condition, there...

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Problems solved by technology

[0004] However, in the prior art, the braking condition is different from the positive power condition. Therefore, if the adjustment strategy of the supercharger is adjusted according to the positive power condition, the braking power may be relatively low. Low, so the braking time is longer, or the braking power is too large, which causes the problem of reduced engine reliability

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