Alcohol fuel alcohol content detection method and module

A technology of ethanol fuel and detection method, which is applied in the direction of fuel oil testing, material inspection products, fuel injection control, etc. It can solve the problems of difficult complete combustion of fuel, changes in alcohol content, unfavorable product costs, etc., and achieve the effect of reducing emissions

CN102877971BActive Publication Date: 2015-04-01ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-04-01

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Abstract

Disclosed are an alcohol fuel alcohol content detection method and module for alcohol fuel automobiles. The method comprises the following steps: collecting oxygen content O(n) of automobile tail gas; acquiring an air-fuel ratio alpha c(n) according to O(n) and the preset alcohol content Ap(n); acquiring oil injection quantity Fc(n) according to alpha c(n) and engine air input G; calculating the fuel deviation Fd(n)=[Fc(n)-Fp(n)] / Fp(n), wherein Fp(n) is the preset oil injection quantity; acquiring the alcohol content deviation Ad(n) according to Fd(n); calculating the current alcohol content Ar(n)=Ad(n)+Ap(n); amending Ap(n+1); acquiring the current oil injection quantity Fr(n) according to Ar(n); amending Fr(n+1); injecting fuel according to Fr(n) and repeating the steps; and stopping repeating when the absolute value of Fd(n) is less than the fuel deviation stabilized value S. The alcohol fuel alcohol content detection method disclosed by the invention can detect the alcohol content in the fuel, and improve the using performance of fuel automobiles.
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Description

Technical field

[0001] The invention relates to the field of flexible fuel vehicles, in particular to a method and module for detecting the alcohol content of ethanol fuel. Background technique

[0002] Fuel ethanol is a renewable energy source, which can be processed from raw materials such as grain and various plant fibers. Ethanol flexible fuel refers to a fuel made by adding a certain proportion of fuel ethanol to gasoline component oil by volume and blending through a specific process. Ethanol flexible fuel is usually called ethanol fuel. As a new type of clean fuel, ethanol fuel is currently the focus of the development of renewable energy in the world. Its advantages are as follows: high octane number, good anti-knock performance; high oxygen content, which is conducive to full combustion; can effectively dredge fuel impurities Precipitation and condensation; can effectively reduce automobile exhaust emissions, improve energy structure; convenient storage and transportati...

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Embodiment Construction

[0033] In order to make the above-mentioned objects, features and advantages of the invention more obvious and understandable, the specific embodiments of the invention will be described in detail below with reference to the accompanying drawings.

[0034] In the following description, many specific details are explained in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the connotation of the present invention. Similar promotion, therefore, the present invention is not limited by the specific embodiments disclosed below.

[0035] See figure 1 , Is a schematic flow chart of a method for detecting alcohol content in ethanol fuel of the present invention, and the steps of the method are as follows:

[0036] The first step: the oxygen content O(n) of automobile exhaust measured by the front oxygen sensor is collected, where n...