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Low-pressure electric controlled dimethyl ether fuel injection system

A technology of dimethyl ether and fuel tanks, applied in the field of internal combustion engine research, can solve the problems of many parts, unfavorable popularization and application, and high processing costs

Inactive Publication Date: 2003-05-14
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantage of this system is that the control process is more complicated, there are too many components, a variety of booster pumps are required, and the processing cost is high, which is not conducive to mass promotion and application.

Method used

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  • Low-pressure electric controlled dimethyl ether fuel injection system
  • Low-pressure electric controlled dimethyl ether fuel injection system

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specific Embodiment approach

[0007] The present invention will be further described below in conjunction with accompanying drawing:

[0008] figure 1 It is the composition principle diagram of the system of the present invention

[0009] like figure 1 As shown, the present invention mainly includes a nozzle 5, an electronic control unit 6, a solenoid valve 7, a pressure gauge 8, a pressure regulating valve 9, a high-pressure nitrogen cylinder 10, a dimethyl ether fuel tank 11, a one-way valve 13, and a fuel tank switch valve 12 and piping etc. The upper end of the high-pressure nitrogen cylinder 10 is connected to the upper part of the dimethyl ether fuel tank 11 through a pipeline, and the outlet of the lower part of the dimethyl ether fuel tank 11 is connected to one end of the solenoid valve 7 through a pipeline, and the other end of the solenoid valve 7 is connected to the single end through a pipeline. The front end of the check valve 13 is connected, and the rear end of the check valve 13 is conn...

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Abstract

The present invention is mainly formed from fuel injector, electric control unit, electromagnetic valve, pressure gauge, pressure-regulating valve, high-pressure nitrogen gas cylinder, dimethyl ether fuel tank, non-return valve and fuel tank opening and closing valve. The regulation of pressure-regulating valve can stabilize pressure at about 3.p MPa in the dimethyl ether fuel tank, this moment said dimethyl ether fuel is in liquid state favourable for injecting. The electromagnetic valve and one-way valve are mounted in connecting pipeline between fuel tank and injector, and the electric control unit is used to control opening time of the electromagnetic valve and inject the dimethyl fuel into the engine at proper moment for a certain time so as to implement optimum control of system.

Description

Technical field: [0001] The invention relates to a dimethyl ether fuel injection system, in particular to a low-pressure electronically controlled dimethyl ether fuel injection system, which belongs to the field of internal combustion engine research. Background technique: [0002] Due to the low boiling point (-24.9°C), high vapor pressure (about 0.5MPa at room temperature) and low viscosity of dimethyl ether, to spray it directly into the engine cylinder requires liquefaction treatment and another series of special measures. measure. Therefore, the traditional fuel injection system cannot be applied to DME fuel. [0003] In the prior art, the conception of the DME engine fuel supply system mainly includes a high-pressure common rail fuel injection system and a pump-pipe-nozzle fuel injection system. The pump-pipe-nozzle fuel injection system is obtained by modifying the traditional diesel engine pump-pipe-nozzle fuel injection system. This system is difficult to effectiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/36F02M21/02
CPCY02T10/32Y02T10/30
Inventor 黄震张光德乔信起王学合杨莫
Owner SHANGHAI JIAO TONG UNIV