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Research and Development of ECU on Two-Stroke GDI Gasoline Engine

Author: ChenXueFei
Tutor: YangYanXiang
School: Tianjin University
Course: Power Machinery and Engineering
Keywords: Two-stroke gasoline engine Direct injection Electronic control unit Specific fuel consumption The MAP
CLC: TK411
Type: Master's thesis
Year: 2005
Downloads: 275
Quote: 3
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Abstract


Two-stroke gasoline engine liter power , mechanical loss , simple structure , low manufacturing cost and ease of maintenance . However , due to a short circuit caused by fuel mixture scavenging loss high prevalence of excess residual gas in the mixture and low- load , two-stroke gasoline engine fuel consumption emissions fatal shortcomings . Direct injection technology is expected to effectively solve the above problems . Cylinder direct injection technology is theoretically possible to completely eliminate a fresh charge short-circuit the loss , using cylinder direct injection fuel supply , pure air scavenging , and end of the process to be ventilation before injector can be achieved , it can be greatly improve the fuel consumption and emissions of the two-stroke engine . Against the residual gas in the low load may lead to the problem of incomplete combustion , the in-cylinder direct injection combustion system, can be used to increase sweep gas to gas ratio and to reduce the amount of residual gas in the stratified combustion technology . The main work of this paper is the use of pulsed high-pressure injection the FAI injection unit , develop a match of the two-stroke direct injection FAI electronic control unit , and the selection of the transformation of the AX-100 motorcycle engine based engine were two-stroke direct injection engine test bed . Records the engine of the economy, power and emission targets . Based primarily on the specific fuel consumption and emissions , the obtained change trend of the optimal control parameters and these parameters with the working conditions of the various conditions , the the final electrically controlled MAP FIG . Preliminary study of two-stroke direct injection engine control strategy . By statistical analysis of the data obtained by the above tests , we found that the EFI system can be good to improve the work of the two-stroke direct injection engine , reduce fuel consumption and improve emissions .

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CLC: > Industrial Technology > Energy and Power Engineering > Internal combustion engine > Gasoline > Theory
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