The invention relates to an engine speed reduction method and device, a vehicle and a storage medium, and belongs to the technical field of engine control. The method comprises the steps that the current rotating speed, the target rotating speed, the free speed reduction characteristic information and the expected speed reduction time of an engine are obtained; according to the free speed reduction characteristic information, predicting first time when the engine is freely decelerated from the current rotating speed to the target rotating speed; if the first time is smaller than or equal to the expected deceleration time, controlling the engine to decelerate freely; and if the first time is larger than the expected speed reduction time, first braking information is determined according to the difference value between the first time and the expected speed reduction time, and braking speed reduction is conducted on the engine according to the first braking information. According to the method, the speed reduction time of the engine in the AMT upshift process can be accurately controlled, so that speed reduction of the engine is completed within the expected speed reduction time.
本发明涉及一种发动机降速方法、装置、车辆和存储介质,属于发动机控制技术领域,其中,该方法包括:获取发动机的当前转速、目标转速、自由降速特征信息和期望降速时间;根据自由降速特征信息,预测发动机由当前转速自由降速至目标转速的第一时间;若第一时间小于或等于期望降速时间,则控制发动机自由降速;若第一时间大于期望降速时间,则根据第一时间与期望降速时间的差值,确定第一制动信息,并根据第一制动信息对发动机进行制动降速。本发明可以对AMT升挡过程中发动机的降速时间进行准确控制,使得发动机在期望降速时间内完成降速。
Engine speed reduction method and device, vehicle and storage medium
一种发动机降速方法、装置、车辆和存储介质
14.03.2025
Patent
Elektronische Ressource
Chinesisch
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