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egr cooler, egr cooler control system and control method thereof

An EGR cooler and control system technology, applied in electrical control, charging system, engine control, etc., can solve problems such as large exhaust gas pressure loss, poor engine economy, and large exhaust gas flow loss, so as to reduce flow loss and reduce fuel consumption efficiency and increase the exhaust gas flow

Active Publication Date: 2020-06-26
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, how to solve the problems of large exhaust gas pressure loss, large exhaust gas flow loss, and poor engine economy when the EGR system operates at medium and high engine speeds has become a technical problem to be solved urgently by those skilled in the art.

Method used

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  • egr cooler, egr cooler control system and control method thereof
  • egr cooler, egr cooler control system and control method thereof
  • egr cooler, egr cooler control system and control method thereof

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Embodiment Construction

[0035] One of the objects of the present invention is to provide an EGR cooler to reduce the exhaust gas pressure loss and exhaust gas flow loss when the engine rotates at a high speed, so as to improve the engine economy.

[0036] Another object of the present invention is to provide an EGR cooler control system.

[0037] Another object of the present invention is to provide a control method for an EGR cooler control system.

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] see Figure 1-Figure 6 ...

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Abstract

The invention discloses an EGR cooler which comprises an EGR cooler body and an EGR gas outlet end cover. The EGR cooler body and the EGR gas outlet end cover are connected together, an inner cavity of the EGR cooler body communicates with a gas outlet of the EGR gas outlet end cover through a one-way valve, the EGR cooler further comprises a switch valve, the switch valve is arranged on a bypasschannel for communicating of the EGR cooler body and the EGR gas outlet end cover, the switch valve is turned on when an engine is rotated at a medium-high speed, and the switch valve is turned off when the engine is rotated at a low speed. According to the EGR cooler, the exhaust gas pressure loss and the exhaust gas flow loss caused when the engine is rotated at the medium-high speed are reduced, the exhaust gas flow of the EGR cooler rotated at the medium-high speed is improved, and engine economy is improved. The invention further relates to an EGR cooler control system and a control method of the EGR cooler control system.

Description

technical field [0001] The invention relates to the technical field of engine exhaust cooling, in particular to an EGR cooler, an EGR cooler control system and a control method thereof. Background technique [0002] Exhaust gas recirculation is to extract part of the exhaust gas generated by the engine, mix it into fresh air, and enter the cylinder of the engine together with the fresh air for re-combustion, which can greatly reduce the nitrogen oxides in the engine exhaust. [0003] With exhaust gas recirculation, in the low engine speed area, the pressure of the intake air is higher than that of the exhaust gas, and it is difficult for exhaust gas to enter the intake pipe. Using a variable cross-section supercharger to adjust the pressure of the exhaust gas makes it easy for the exhaust gas to enter the intake air, but the variable cross-section supercharger has high cost and poor reliability. At present, the method of adding a check valve to a supercharger with an ordina...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00F02M26/25F02M26/26F02M26/29
CPCF02D41/0052F02M26/25F02M26/26F02M26/29
Inventor 王迎迎刘伟庞斌张荣胜
Owner WEICHAI POWER CO LTD
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