Device for controlling air-fuel ratio

A control device and air-fuel ratio technology, applied in fuel injection control, electrical control, engine control, etc., can solve problems such as insufficient combustion and inability to burn gasoline, and achieve the effects of good performance, elimination of interference, and precise control effects.

Active Publication Date: 2009-12-30
湖南省力宇燃气动力有限公司
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AI Technical Summary

Problems solved by technology

For example, in gasoline internal combustion engines, when gasoline and air are mixed and burned, too much or too little air cannot make gasoline burn effectively, that is, insufficient combustion

Method used

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  • Device for controlling air-fuel ratio
  • Device for controlling air-fuel ratio

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Embodiment Construction

[0035] The present invention is further described in conjunction with the following examples.

[0036] An air-fuel ratio control device of the present invention such as figure 1As shown, it includes an air-fuel ratio target value setting module 1, an air-fuel ratio detection module 2, a comparison module 3, a controller module 4 and an execution module 5; further includes a methane concentration sensor unit 6, an exhaust oxygen sensor feedback unit 7 and power feedback unit 8. The air-fuel ratio target value setting module 1 determines the air-fuel ratio target value of the internal combustion engine at this moment according to the working conditions of the gas-fired internal combustion engine, including the change of the speed of the internal combustion engine and the throttle position; Flow rate, get the actual value of the air-fuel ratio in the current internal combustion engine working condition, and send the obtained actual air-fuel ratio value to the comparison module 3...

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Abstract

The invention provides a device for controlling an air-fuel ratio, which comprises an air-fuel ratio target value setting module, an air-fuel ratio detection module, a comparison module, a controller module and an execution module, wherein, the air-fuel ratio target value setting module determines the air-fuel ratio of a fuel power generation internal-combustion engine according to the working conditions of the internal-combustion engine; the air-fuel ratio detection module detects the air-fuel ratio actual value under the current working condition of the internal-combustion engine; the comparison module compares the air-fuel ratio actual value with the air-fuel ratio target value and sends the comparison results to the controller module; the controller module outputs the control signals to the execution module; and the execution module regulates the air flow and fuel flow in the main fuel pipe. The device further comprises a methane concentration sensor unit, an exhaust gas oxygen sensor feedback unit and a power feedback unit; wherein, the comparison results of the comparison module are modified by the methane concentration sensor unit, the exhaust gas oxygen sensor feedback unit and the power feedback unit and further sent to the controller module for treatment. The invention has the characteristics of timely detection, accurate control, energy conservation, environment friendliness, high efficiency and the like.

Description

technical field [0001] The invention relates to the field of gas-fired internal combustion engines, in particular to an air-fuel ratio control device for internal combustion engines. Background technique [0002] In the prior art, the air-fuel ratio refers to the weight ratio of the air sucked in during the intake stroke of the engine to the fuel. The air-fuel ratio is an important parameter when the engine is running, and it is a performance parameter that has a great impact on combustion exhaust emissions, engine power and economy. For example, in a gasoline internal combustion engine, when gasoline and air are mixed for combustion, too much or too little air cannot make the gasoline burn effectively, that is, the combustion is not complete. Therefore, the air-fuel ratio control device of modern internal combustion engines is an important part of the internal combustion engine control system. For a long time, in order to further improve the combustion of internal combust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/14
Inventor 王跃峰李顶根邓海军王斌田素恒李久昌
Owner 湖南省力宇燃气动力有限公司
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