EGR (exhaust gas recirculation) gas temperature control device, EGR gas temperature control method, engine and engineering machinery

A gas temperature and control device technology, applied in the fields of engines, construction machinery, and EGR gas temperature control devices, can solve problems such as excessive emissions, uncontrollable EGR gas temperature, damage to the engine EGR valve, etc.

Active Publication Date: 2013-02-06
昆山三一动力有限公司
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  • Abstract
  • Description
  • Claims
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[0004] In view of this, the present invention proposes an EGR gas temperature control device to solve the problems t

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  • EGR (exhaust gas recirculation) gas temperature control device, EGR gas temperature control method, engine and engineering machinery

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[0024] It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

[0025] The basic idea of ​​the present invention is to solve the problem of uncontrollable EGR gas temperature. The present invention provides an EGR gas temperature control device, which adds a bypass pipe to the passage of the EGR cooler coolant, and cools the inside of the bypass pipe. The flow rate of the liquid is used to adjust the flow rate of the coolant in the EGR cooler to control the temperature of the EGR gas within the required range.

[0026] Combine below figure 1 , The preferred embodiment of the present invention will be described in further detail: the EGR gas temperature control device includes: an EGR cooler 1 for cooling the EGR gas introduced from the engine exha...

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Abstract

The invention discloses an EGR (exhaust gas recirculation) gas temperature control device, which comprises an EGR cooler for cooling the EGR gas exhausted from an engine exhaust pipe, a bypass pipe of which an inlet is communicated with a cooling liquid inlet of the EGR cooler, a flow regulating valve which is mounted on the bypass pipe and is used for regulating the flow of a cooling liquid in the bypass pipe. The temperature of the EGR gas is controlled by regulating the opening degree of the flow regulating valve. The EGR gas temperature control device has the advantages of simple control structure and convenience in operation, and can prevent EGR valve from being damaged due to over high/low temperature of the EGR gas and also prevent colloidal materials and carbon from being deposited in the EGR cooler and the EGR valve. The invention further discloses an engine, engineering machinery and an EGR gas temperature control method.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to an EGR gas temperature control device, a control method, an engine, and engineering machinery. Background technique [0002] Exhaust Gas Recirculation (EGR), referred to as EGR, is a technology in which the engine cools a part of the exhausted gas after combustion and then introduces it into the intake manifold to make it burn again. The EGR cooling system is one of the key components of the EGR system. The temperature of the engine exhaust is generally 450-700 degrees. It needs to be cooled to a certain temperature range to fully exert the efficiency of the engine and minimize the emission of polluting gases. [0003] The gas temperature of the exhaust manifold of the engine and the flow rate of the EGR gas change with the change of the working condition, and the current EGR cooler cannot adjust the cooling capacity according to the change of the working condition, so the te...

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Application Information

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IPC IPC(8): F02M25/07F02M26/33
CPCY02T10/121Y02T10/12
Inventor 吴天亭罗毅段彩莲
Owner 昆山三一动力有限公司
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