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Method and device for controlling an oil pump

A control method and oil pump technology, which is applied in the field of oil pump control, can solve problems such as failure to meet the adaptive control of oil pumps, and achieve the effect of improving service life

Active Publication Date: 2021-09-21
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, using the lubrication requirements of the electric drive gearbox to control the oil pump cannot satisfy the hybrid vehicle's adaptive control of the oil pump in the electric drive gearbox.

Method used

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  • Method and device for controlling an oil pump
  • Method and device for controlling an oil pump
  • Method and device for controlling an oil pump

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Embodiment Construction

[0062] At this moment, hybrid vehicles are increasingly universal in people's daily lives. The power source of hybrid vehicles includes engines and motors, while the motor will continue to heat up, in order to prevent the motor temperature from being too high, the motor is used to affect the normal driving of the car, and the motor is required to be equipped with a oil pump, and the motor is cooled; and the gearbox also A separate oil pump is required to achieve lubrication of the gearbox. In order to make the structure of the car more compact, some hybrid vehicles currently become a motor and gearbox set into a power transmission, which is equipped with an oil pump, and controls the oil pump through the lubrication requirements of the electric drive shift. Cooling and lubrication of the gearbox.

[0063] However, inventors have studied that there is different requirements for the cooling and lubrication of the oil pump, and only the lubrication requirements of the electric drive ...

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Abstract

The invention discloses a method and device for controlling an oil pump, which are used for controlling the rotational speed of the oil pump in the electric drive gearbox of a hybrid electric vehicle including a motor, a gearbox and an oil pump, specifically: by obtaining the stator temperature of the motor, the motor generator Heat, and the oil pump speed range required for gearbox lubrication; use the stator temperature and calorific value to calculate the oil pump speed required for motor cooling; determine the oil pump according to the oil pump speed range required for gearbox lubrication and the oil pump speed required for motor cooling target speed to control the oil pump to run at the target speed. In this way, the oil pump in the electric drive gearbox can comprehensively consider the needs of the motor and the gearbox, and adaptively control the speed of the oil pump according to multiple factors such as cooling and lubrication, so that the oil pump can effectively control the electric drive gearbox under reasonable speed control. Cooling and lubrication, thereby improving the service life of the electric drive transmission in hybrid vehicles.

Description

Technical field [0001] The present invention relates to the field of hybrid vehicle, and in particular, to a control method and apparatus for an oil pump. Background technique [0002] For hybrid vehicles, in one case, the motor and gearbox are two separate devices. On the one hand, in order to prevent the motor from being continuously generated during operation, the temperature of the motor is too high, affecting the normal driving of the car, needs to be The motor is equipped with a oil pump that cools the temperature of the motor; on the other hand, in order to achieve lubrication of the gearbox, it is also necessary to provide a fuel pump for the gearbox. In this way, it is necessary to separate a oil pump for the motor and the gearbox. In another case, in order to make the structure of the car more compact, some hybrid vehicles becomes the motor and gearboxes into the electric drive gearbox, which is uniformly equipped with an oil pump to achieve cooling and lubrication of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/30B60W10/08B60W10/10B60W20/00
CPCB60W10/08B60W10/10B60W10/30B60W20/00B60W2510/081B60W2510/083
Inventor 张鹏君武笛马良峰宗大伟
Owner SAIC MOTOR