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Electric water pump control method and ecu

A technology of electronically controlled water pump and control method, applied in pump control, charging system, liquid variable capacity machinery, etc., can solve problems such as overheating of EGR cooler, and achieve the effect of avoiding local overheating

Active Publication Date: 2022-04-26
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an electronically controlled water pump control method and ECU to solve the local overheating problem inside the EGR cooler

Method used

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  • Electric water pump control method and ecu
  • Electric water pump control method and ecu
  • Electric water pump control method and ecu

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Embodiment Construction

[0040] By the above-mentioned drawings, there have been shown specific embodiments of the invention, which will be described in more detail hereinafter. These drawings and written descriptions are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to specific embodiments.

[0041] figure 1 A schematic structural diagram of an EGR system provided for an embodiment of the present invention, such as figure 1 Shown: the EGR system in the embodiment of the present invention includes: an electronic control unit (Electronic Control Unit, ECU) 101 , an EGR cooler 102 and an electronically controlled water pump 103 . The EGR cooler 102 further includes an EGR valve 1021 . The ECU 101 controls the rotational speed of the electronically controlled water pump 103 and the opening of the EGR valve 1021 , and the EGR cooler 102 cools the recovered exhaust gas by using the cold water provided ...

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Abstract

The present invention provides an electronically controlled water pump control method and an ECU. The method includes: obtaining the operating conditions of the engine, querying the preset MAP map according to the operating conditions to determine the target water flow of the electronically controlled water pump, and determining the electric current flow rate according to the target water flow. Control the target speed of the water pump, and control the operation of the electronically controlled water pump according to the target speed and the current speed of the electronically controlled water pump. The embodiment of the present invention determines the minimum water flow corresponding to the operating condition of the engine according to the preset MAP map, and determines the speed of the electronically controlled water pump corresponding to the minimum water flow, and controls the operation of the electronically controlled water pump according to the target speed and the current speed of the electronically controlled water pump , to avoid the local overheating problem inside the EGR cooler during the cooling process.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an electronically controlled water pump control method and an ECU. Background technique [0002] At present, the engine generally adopts the EGR (Exhaust Gas Recirculation, exhaust gas recirculation for short) system to reduce the NOX emission. By using the EGR cooler to cool a part of the exhaust gas discharged from the engine cylinder, mix it with fresh air and then enter the engine, realizing the exhaust gas reuse. [0003] At present, the internal combustion engine industry generally adopts the detection of the cooling effect of the EGR cooler by detecting the outlet temperature of the EGR cooler. When the outlet air temperature of the EGR cooler exceeds the set maximum temperature, the cooling water flow is increased by increasing the rotational speed of the electronically controlled water pump to improve the cooling effect of the EGR cooler. [0004] However, by detecting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/06F04B49/20F02M26/33
CPCF04B49/065F04B49/20F02M26/33
Inventor 么丽丽刘晓林尹召阳王洪忠张玉娟杨宇增
Owner WEICHAI POWER CO LTD