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Gas system of backing stage pressure reducers

A pressure reducer and gas technology, applied in the direction of charging system, combustion engine, machine/engine, etc., can solve the problem that the engine emission index is difficult to improve, and achieve the effect of improving the emission index

Inactive Publication Date: 2008-10-01
SHANGHAI ZHONGYOU ENTERPRISE GRP CO LTD +1
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  • Summary
  • Abstract
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Problems solved by technology

However, since the flow rate of the gas output by the pressure reducer is still randomly adjusted and controlled with the opening of the engine throttle, in fact, many factors such as the temperature and calorific value of the gas, the atmospheric pressure when the engine is working, and the ambient temperature will affect the combustion of the engine. conditions, it is difficult to keep the engine in an optimal combustion state at any time, so it is difficult to improve the engine's emission indicators

Method used

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  • Gas system of backing stage pressure reducers

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Embodiment Construction

[0010] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0011] see figure 1 , the gas system of the pre-stage pressure reducer, which includes at least two stages of decompression chambers and back pressure chambers. A servo-regulated electric valve is provided on the side of the air inlet of at least one valve seat, and a servo-regulated electric valve is arranged on the side of the air inlet of the valve seat between the decompression chamber and the back pressure chamber, and the servo-regulated electric valve is controlled by the ECU (Electric control center) control.

[0012] The ECU (Electronic Control Center) collects air temperature information in the air filter, engine speed information, throttle opening information, intake manifold vacuum information, engine exhaust gas oxygen content info...

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Abstract

The invention relates to a gas system of a pre-stage reducer, comprising at least two stages of reduction chambers and back pressure chambers, each stage of reduction chamber and back pressure chamber are separated by a diaphragm, valve seats are arranged between the stages of reduction chambers. The invention is characterized in that the gas inlet side of at least one valve seat is provided with a servo regulating electric valve. The gas inlet side of the valve seat between the reduction chamber and the back pressure chamber is provided with a servo regulating electric valve controlled by an ECU (electric control center).

Description

technical field [0001] The invention relates to a pressure reducer, in particular to a gas pressure reducer with an electric control regulating valve for gas vehicles. Background technique [0002] The pressure reducer is a key component between the gas cylinder and the engine in a natural gas vehicle. It reduces the high-pressure natural gas in the cylinder to normal pressure and enters the mixer to mix with air before entering the engine. At present, the more advanced one is the integrated three-stage pressure reducer, that is, the three-stage decompression chamber and the back pressure chamber are coaxially arranged, and there are set Valve seat, this pressure reducer realizes a relatively stable gas supply to the mixer. However, since the flow rate of the gas output by the pressure reducer is still randomly adjusted and controlled with the opening of the engine throttle, in fact, many factors such as the temperature and calorific value of the gas, the atmospheric pressu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M21/02
CPCY02T10/32Y02T10/30
Inventor 杨增清
Owner SHANGHAI ZHONGYOU ENTERPRISE GRP CO LTD
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