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egr gas temperature control method and related device

A gas temperature and control method technology, applied in the direction of charging system, exhaust gas recirculation, machine/engine, etc., can solve the problems of substandard emission, low catalyst activity of after-treatment system, and slow increase of exhaust gas temperature, etc.

Active Publication Date: 2020-06-02
WEICHAI POWER CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0002] The catalyst activity of the engine aftertreatment system is related to the exhaust temperature of the engine, that is, when the exhaust temperature of the engine is within a certain temperature range, the catalyst activity of the engine aftertreatment system can be optimized, and when the engine is in a cold state, the exhaust gas The temperature rises slowly and the exhaust temperature is low, which leads to low catalyst activity of the after-treatment system and substandard emissions; and if the intake throttle valve or exhaust throttle valve is added for thermal management, due to the increase of intake resistance or exhaust resistance , it will inevitably lead to the increase of pump air work and reduce the engine efficiency

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  • egr gas temperature control method and related device
  • egr gas temperature control method and related device

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Embodiment Construction

[0085] 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.

[0086] As mentioned in the background technology, the catalyst activity of the engine aftertreatment system is related to the exhaust temperature of the engine, that is, when the exhaust temperature of the engine is in a certain temperature range, the catalyst activity of the engine aftertreatment system can reach the optimum, and the engine is in the In the cold state, the exhaust temperature rises slowly and the exhaust temperature is low, which leads to low ...

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Abstract

The invention provides an EGR gas temperature control method, an EGR device and an engine exhaust gas temperature control device. According to the needed mass of acquired EGR gas, the target temperature of the EGR gas, the actual temperature of high-temperature EGR gas and the actual temperature of low-temperature EGR gas, the target mass of the high-temperature EGR gas and the target mass of thelow-temperature EGR gas are calculated and acquired; and then the actual mass of the high-temperature EGR gas and the actual mass of the low-temperature EGR gas are adjusted by referring to the targetmass of the high-temperature EGR gas and the target mass of the low-temperature EGR gas, so that the actual mass of the EGR gas is equal to the needed mass of the EGR gas. Thus, when the difference between the adjusted actual mass of the EGR gas and the needed mass of the EGR gas are within the allowed range, the inlet gas temperature of an engine can be fast controlled, and the exhaust gas temperature of the engine is fast controlled.

Description

technical field [0001] The invention relates to the field of engine exhaust temperature control, in particular to an EGR gas temperature control method, an EGR device and an engine exhaust temperature control device. Background technique [0002] The catalyst activity of the engine aftertreatment system is related to the exhaust temperature of the engine, that is, when the exhaust temperature of the engine is within a certain temperature range, the catalyst activity of the engine aftertreatment system can be optimized, and when the engine is in a cold state, the exhaust gas The temperature rises slowly and the exhaust temperature is low, which leads to low catalyst activity of the aftertreatment system and substandard emissions; and if the intake throttle valve or exhaust throttle valve is added for thermal management, due to the increase of intake resistance or exhaust resistance , it will inevitably lead to the increase of pump air work and reduce the engine efficiency. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M26/33
Inventor 郭圣刚王意宝姚旺刘学哲王晓华
Owner WEICHAI POWER CO LTD
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