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Method and apparatus for approaching optimum air fuel ratio

An optimal air-fuel ratio, air-fuel ratio technology, applied in the field of air-fuel ratio, can solve the problems that cannot meet the application status and prospects of modern gas engines, performance indicators are not ideal, and poor adaptability, etc.

Inactive Publication Date: 2006-12-06
张嗣钊
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Problems solved by technology

The diaphragm type mainly adjusts the air-fuel ratio by adjusting the intake pressure through the pressure regulator. The problem is that the air-fuel ratio changes greatly when the engine is working, and the adaptability to different types of gas adjustment is poor; Venturi tube The type mixer mainly changes the size of the air-fuel ratio by selecting the size of the throat or changing the vacuum at the throat, but the performance index is not ideal. Therefore, the above two general methods and devices cannot meet the needs of modern gas engines. Application status and prospects of

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  • Method and apparatus for approaching optimum air fuel ratio
  • Method and apparatus for approaching optimum air fuel ratio
  • Method and apparatus for approaching optimum air fuel ratio

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Embodiment Construction

[0056] A method to approach the optimal air-fuel ratio, including initially determining the range of the air-fuel ratio according to different types of combustible gases, such as C H4 The theoretical air-fuel ratio of the gas is 9.5:1, and the actual air-fuel ratio number used is 12-18. When using this method, an air-fuel ratio is initially determined, for example, 13:1 here.

[0057] The following implementation steps are:

[0058] (A) According to the above-mentioned air-fuel ratio of 13:1, the hole number ratio is determined, and it can be seen from the formula Bkr that when P k =P r when there is Bkr = C · a b , in C = γ r γ k , Chad r =7.0N / m 3 , gamma k =12.68N / m 3 ,so

[0059] C = ...

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Abstract

The present invention discloses a method for approximating optimum air-fuel ratio and its equipment. Said method includes definition of primary air-fuel ratio range according to different gases, and also includes the following steps: (A). using one formula to represent air-fuel ratio, i.e. pore number ratio of air and fuel gas; (B). defining actual pore number ratio; (C). adopting special-purpose equipment to implement pore number ratio scheme; and (D). utilizing said special-purpose equipment to measure and resolve optimum pore number ratio. Said special-purpose equipment includes air inlet cover, air cavity, air hole, fuel gas cavity, fuel gas hole and mixing cavity, also includes an intermediate body for mounting mixing cavity, one hole plate which is mounted between air inlet cover and intermediate body and has fuel gas hole and air hole on it and a valve connected with intermediate body.

Description

1. Technical field [0001] The invention relates to the air-fuel ratio of a premixed gas fuel engine, in particular to a method and device for approaching the optimum air-fuel ratio. 2. Background technology [0002] At present, the method and device for adjusting the air-fuel ratio of a premixed gas engine mainly use a diaphragm mixer or a Venturi mixer for adjustment. The diaphragm type mainly adjusts the air-fuel ratio by adjusting the intake pressure through the pressure regulator. The problem is that the air-fuel ratio changes greatly when the engine is working, and the adaptability to different types of gas adjustment is poor; Venturi tube The type mixer mainly changes the size of the air-fuel ratio by selecting the size of the throat or changing the vacuum at the throat, but the performance index is not ideal. Therefore, the above two general methods and devices cannot meet the needs of modern gas engines. application status and prospects. 3. Contents of the inventi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M7/12
Inventor 张嗣钊
Owner 张嗣钊