Alcohol active mixed fuel jetting method and appts. thereof

Abstract

The present invention relates to a fuel supply system for engine, in particular it relates to an automobile flexible fuel injection method and device adopting methyl alcohol fuel or ethyl alcohol fuel. It is characterized by that on the basis of existent gasoline fuel injection system an alcohol fuel injection system is added, a flexible mixed fuel controller is used for controlling gasoline fuel injection system and alcohol fuel injection system, and a change-over switch is utilized to control the alcohol fuel nozzle and gasoline nozzle, so that the fuel fed into the engine can be gasoline, alcohol fuel or mixed fuel of them according to a certain mixing ratio.

Description

(1) Technical field [0001] The invention relates to an engine fuel supply system, in particular to an automobile flexible fuel injection method and device using methanol fuel or ethanol fuel. (2) Background technology [0002] Existing automotive fuel injection systems generally use electronically controlled single-point injection and electronically controlled multi-point continuous injection systems, such as gasoline or diesel injection systems, and petroleum liquefied gas injection systems. Although electronically controlled single-point injection and electronically controlled multi-point continuous injection systems have the characteristics of low price and convenient installation and use, gasoline or diesel injection systems and petroleum liquefied gas injection systems can only be used separately. Existing automotive flexible fuel injection systems combine gasoline or diesel injection systems with alcohol fuel injection systems, mainly using gasoline fuel, supplemented ...

AI Technical Summary

Problems solved by technology

There are two main types of existing flexible fuel systems. One is a flexible fuel system represented by Ford Motor Company of the United States that uses a fuel composition sensor to identify fuel composition and adjusts the working state of the engine control system based on the signal. The engine of this flexible fuel system The requirements are very high; the other is a flexible fuel system that uses the output voltage signal of an oxygen sensor to distinguish and identify fuel components represented by Chery Automobile Company of China, but the oxygen sensor is in an inactive state during the initial period of engine startup. Fuel composition can't play any role, and the exhaust emission control in the engine start-up stage is becoming more and more important. Under this working condition, the inability to effectively identify the fuel composition will inevitably affect the accuracy of fuel supply, causing a series of problems such as start-up and emissions.

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