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Control method and apparatus for gasohol flexible fuel engine

A flexible fuel and control method technology, applied in engine control, combustion engine, fuel injection control, etc., can solve the problems of insoluble alcohol fuel and gasoline, achieve stable performance, low modification cost, and prolong service life

Inactive Publication Date: 2009-08-12
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem that alcohol fuel and gasoline are insoluble, and the ratio of alcohol fuel to gasoline can reach more than 90% when the engine is in flexible fuel mode

Method used

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  • Control method and apparatus for gasohol flexible fuel engine
  • Control method and apparatus for gasohol flexible fuel engine
  • Control method and apparatus for gasohol flexible fuel engine

Examples

Experimental program
Comparison scheme
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Embodiment approach

[0033] The present invention is characterized in that a set of alcohol fuel electronically controlled injection system is added on the basis of the original electronically controlled gasoline engine, or a set of gasoline injection system and alcohol injection are respectively added after the compression ratio is reduced on the basis of ignition engine (CNG) system; the two systems are respectively controlled by two controllers, and the type of fuel is controlled by the fuel selection switch installed on the control panel in the cab. combustion. The utility model has the advantages of low modification cost and stable performance, and is applicable to the modification of gasoline-fueled new vehicles or vehicles in use.

[0034] figure 2 It is the schematic diagram of the fuel supply system and electronic control system of the flexible fuel engine: including two sets of independent fuel supply systems, injection systems and controllers.

[0035] Gasoline controller 11 is conne...

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Abstract

The invention discloses a method and a device for controlling a gasoline alcohol flexible fuel engine, wherein the method comprises supply and injection of gasoline and supply and injection of alcohols; the working mode comprises that the engine is started by using a mode of original vehicle gasoline and a gasoline nozzle injects gasoline to keep the engine working normally; when a select switch of the alcohol fuel is closed, an alcohol controller detects the cooling liquid temperature and the engine oil temperature of the engine: if the cooling liquid temperature and the engine oil temperature reach the evaporation point of the alcohols, the alcohol controller starts to receive an oil injection pulse sent by an gasoline controller and convert the oil injection pulse into the injection pulse width of the alcohol fuel; the alcohol controller converts the oil injection pulse into an alcohol injection pulse and controls an alcohol nozzle to work; the modes that the gasoline controller controls the gasoline injection and the alcohol controller controls the alcohol injection are switched in proportion and are performed alternately; and after the alcohol nozzle finishes 8 to 10 seconds of working cycle of the engine through continuous injection, the gasoline nozzle finishes 1 to 2 seconds of working cycle through injection, and the operations are repeated alternately.

Description

technical field [0001] The invention relates to a gasoline alcohol flexible fuel engine control method and device, which belongs to the mixed combustion technology of gasoline and alcohol fuel. Background technique [0002] With the increasingly serious problems of environmental pollution and energy shortage, countries all over the world are actively looking for clean alternative energy sources, and alcohol, as an oxygen-containing and renewable bioenergy, is considered to be an ideal clean substitute. fuel. At present, alcohols are used as alternative fuels mainly to make alcohol gasoline by adding solvent-promoting additives in a certain proportion of anhydrous alcohols and gasoline. In this method, the proportion of alcohol blended burning is relatively small, and the amount of replacing gasoline is limited. Moreover, the cost of additives is high, and the appropriate alcohol replacement ratio cannot be selected according to the change of working conditions when the eng...

Claims

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Application Information

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IPC IPC(8): F02D19/06F02D41/30
CPCY02T10/36Y02T10/30
Inventor 黄星光刘金春王泓裴泽健周志强
Owner DONGFENG MOTOR CORP HUBEI
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