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A gas and egr mixed direct injection system

A gas and mixed gas technology, applied in the charging system, combustion engine, exhaust gas recirculation, etc., to eliminate the response lag, eliminate the uneven distribution of each cylinder, and avoid the response delay.

Active Publication Date: 2018-09-25
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a gas and EGR mixed direct injection system for the existing problems of EGR system delay and precise control of EGR quantity.

Method used

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  • A gas and egr mixed direct injection system

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Embodiment Construction

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] see figure 1 , a gas and EGR mixed direct injection system, including a compressor 2, a turbine 4, an air intake intercooler 6, an engine 8, a cylinder 9, a low-pressure EGR pipe 12, a high-pressure EGR pipe 15, an EGR pump 18, a mixer 20, Mixed gas rail 23, mixed gas nozzle 25, chemical gas bottle 26 and gas pump 31. The air inlet of the compressor 2 is connected with the air intake pipe 1, and the air outlet of the compressor 2 is connected with the inlet of the air intake intercooler 6 through the air outlet pipe 5 of the air compressor; Gas main pipe 7 is connected with engine 8 . The inlet of the turbine 4 is connected to the engine 8 through the exhaust manifold 10 , and the outlet of the turbine 4 is connected to the exhaust pipe 11 ; the compressor 2 and the turbine 4 are connected through a connecting shaft 3 . The ...

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Abstract

The invention discloses a fuel gas and EGR mixed direct injection system. A low-pressure EGR pipe is connected with an exhaust pipe and a high-pressure EGR pipe, a low-pressure EGR valve is installed on the low-pressure EGR pipe, and a high-pressure EGR valve is installed on the high-pressure EGR pipe; an inlet of an EGR pump is connected with an exhaust manifold through the high-pressure EGR pipe, and an outlet of the EGR pump is connected with an inlet in one end of a mixer through an air outlet pipe of the EGR pump; an outlet of a liquidation fuel gas vessel is connected with an inlet of a fuel gas pump through an air inlet pipe of the fuel gas pump, an outlet of the fuel gas pump is connected with an inlet in the other end of the mixer through an air outlet pipe of the fuel gas pump, an outlet of the mixer is connected with an inlet of a mixed gas track through a mixed gas track connecting pipe, an outlet of the mixed gas track is connected with a mixed gas nozzle through a mixed gas supply pipe, and the mixed gas nozzle is installed on a cylinder or in an air inlet channel close to the cylinder.

Description

technical field [0001] The invention relates to a direct injection system, more specifically to a gas and EGR mixed direct injection system, which belongs to the technical field of exhaust gas recirculation (EGR) and gas supply systems in the field of gas engines. Background technique [0002] At present, in the face of the increasingly severe environmental crisis, countries have increasingly stringent requirements for emission regulations, so reducing emissions has become the main direction for the development of internal combustion engines. Clean fuels represented by natural gas are gradually being valued. A large number of studies have shown that the emissions of gas engines using clean fuels are significantly lower than those of traditional gasoline and diesel engines. At the same time, clean fuels such as natural gas can alleviate my country's demand for oil to a certain extent as an alternative fuel. On the other hand, the EGR system is used to reduce the NO of the int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M21/02F02M26/09F02M26/14F02M26/36F02M26/34F02M26/38
CPCF02M21/02F02M21/0218Y02T10/30
Inventor 徐敏程伟李智张宏飞安涛
Owner DONGFENG COMML VEHICLE CO LTD
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