Method, device and computer-readable storage medium for controlling the speed of electronic oil pump

Abstract

The invention discloses a method for controlling the rotational speed of an electronic oil pump, which includes the steps of: determining the working range of the electronic oil pump at the current moment according to the system working temperature obtained in real time and the preset corresponding relationship; wherein, the preset corresponding relationship is The corresponding relationship between the working temperature of the system and the working range of the electronic oil pump; determine the required flow rate of the system according to the working range of the electronic oil pump, and determine the working condition of the vehicle at the current moment based on the required flow rate of the system The flow that the electronic oil pump needs to provide; according to the flow that the electronic oil pump needs to provide and the displacement and volume coefficient of the electronic oil pump, determine the target control speed of the electronic oil pump, so that the target speed of the electronic oil pump can be passed Controlling the rotational speed controls the rotational speed of the electronic oil pump. Correspondingly, the present invention also provides a device for controlling the rotation speed of the electronic oil pump. By adopting the embodiment of the present invention, the working power of the electronic oil pump can be reduced to achieve the effect of energy saving.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a method, device and computer-readable storage medium for controlling the rotational speed of an electronic oil pump. Background technique [0002] The hybrid electromechanical coupling system of a hybrid electric vehicle is supplied with dual pumps by an electronic oil pump and a mechanical oil pump. In order to ensure the normal operation of the car, it is necessary to control the oil supply of the oil pump. Since the engine is directly connected to and drives the mechanical oil pump, it is not necessary to control the mechanical oil pump, but it is necessary to control the electronic oil pump. When the hybrid electric vehicle is running in pure electric mode, since the mechanical oil pump directly driven by the engine does not work, the electronic oil pump needs to provide the lubrication flow or cooling flow required by the system. Moreover, when the hybrid ...

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Problems solved by technology

[0003] At present, the method of providing the lubricating flow or cooling flow required by the system through the electronic oil pump is to control the speed of the electronic oil pump to provide a fixed amount of flow, but due to the hybrid electromechanical coupling system The working state is complicated, and the flow rate required by the electronic oil pump in each working state is inconsistent. When the flow rate provided by the electronic oil pump is less, if the electronic oil pump is controlled to provide a fixed flow rate, the electronic oil pump will provide more than the actual demand. flow, thereby increasing the working power of the electronic oil pump, resulting in a waste of electric energy for the electronic oil pump

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