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Pressure control device, system and method

A pressure control and pressure technology, which is applied in the field of pressure control devices of electric pumps, can solve the problems of occupying space and increasing costs, and achieve the effects of saving space, saving costs, and improving accuracy and response time.

Active Publication Date: 2018-07-27
JOHNSON ELECTRIC SHENZHEN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, this prior art must add a pressure sensor in the gearbox, which not only takes up space, but also increases the cost

Method used

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  • Pressure control device, system and method
  • Pressure control device, system and method
  • Pressure control device, system and method

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Embodiment Construction

[0052]Various embodiments of the present invention will be described with reference to the accompanying drawings. In the description and drawings, elements with similar structures or functions will be denoted by the same symbol. It can be understood that the drawings are only used for reference and description, and are not intended to limit the present invention. The dimensions shown in the drawings are only for the convenience of clear description, and do not limit the proportional relationship or give an exhaustive description of the present invention, nor limit the scope of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention.

[0053] refer to figure 1 , is the application environment diagram of the pressure control device in the embodiment of the present invention, the pressure control device is applied in the field of ...

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Abstract

The application provides a pressure control device, system and method for controlling an output oil pressure of an electric pump. The system is composed a motor, an oil pump driven by the motor, a motor driver circuit connected with the motor, and a pressure control device. The pressure control device is configured to output a target value of the oil pressure based on the oil pump, an obtained estimated motor electromagnetic torque corresponding to the target value, and an actual detection current flowing through the motor and determine an electrification voltage of the motor; and power is provided for the motor based on the electrification voltage by the motor driver circuit.

Description

【Technical field】 [0001] The present invention relates to the field of automobiles, and more specifically, to a pressure control device, system and method for an electric pump of a hybrid electric vehicle. 【Background technique】 [0002] In the automotive field, the integrated electric pump (Integrated Electrical Pump, IEP) is used to supply engine oil to the gearbox after the main pump in the internal combustion engine or gearbox is shut down, because the integrated electric pump can provide engine oil with a certain oil pressure for a longer period of time to the gearbox and thus have advantages over conventionally used accumulators. [0003] In order to maintain the oil pressure of the electric pump, an existing technology is to use a pressure sensor to sense the oil pressure of the gearbox, combined with electronic components such as a controller and a relay to form a closed-loop control of the electric pump, so as to maintain a suitable oil pressure At the same time ac...

Claims

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Application Information

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IPC IPC(8): H02P21/20H02P21/10H02P27/08G05D16/20
CPCG05D16/20H02P21/10H02P27/08H02P21/0003H02P21/06H02P21/20F01M1/02F01M1/16F01M2001/0253F01M2250/60F01M2250/64F04B49/065F04B17/03B60W10/30B60W20/00F01M2001/0215B60Y2200/92H02P23/0004H02P23/0077H02P23/14
Inventor 向佑清洪小圆李华波郎庆亮颜小君
Owner JOHNSON ELECTRIC SHENZHEN
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