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Fuel return-flow system

A technology of fuel oil and fuel injection pump, which is applied in the direction of charging system, condensed fuel collection/return, fuel supply device, etc., and can solve the problem of high gas phase components in the oil storage tank, etc.

Inactive Publication Date: 2008-12-31
SHANGHAI ZHONGYOU ENTERPRISE GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current dimethyl ether fuel system, the dimethyl ether returned by the fuel pump and the nozzle is not pre-cooled, resulting in excessive gas phase components in the oil storage tank

Method used

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  • Fuel return-flow system

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Embodiment Construction

[0013] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0014] see figure 1 , a dimethyl ether city bus fuel return system, comprising a nozzle return branch 1 and a fuel injection pump return branch 2, the nozzle return branch 1 and the fuel injection pump return branch 2 are connected through a return tee 3, and the return The tee 3 is also connected to the oil storage group through a condenser 4 . The nozzle return branch 1 includes a return solenoid valve 11 and a one-way valve 12 . The fuel injection pump return branch 2 includes an injection pump return solenoid valve 21 and a leakage valve 22 .

[0015] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is n...

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Abstract

Disclosed is a dimethyl ether city bus fuel-oil reflow system which comprises a nozzle reflow branch and a fuel-oil injection pump reflow branch; the nozzle reflow branch is connected with the fuel-oil injection pump reflow branch through a reflow three-way valve; the reflow three-way valve is connected with an oil storage group through a condenser. The nozzle reflow branch comprises a reflow electromagnetic valve and a check valve. The fuel-oil injection pump reflow branch comprises an injection pump reflow electromagnetic valve and a leak valve. In the dimethyl ether city bus fuel-oil reflow system, the condenser is additionally arranged between the oil reflow three-way and the oil storage group for condensing the reflow dimethyl ether from the fuel-oil pump and the nozzle so that the reflow fluid is ensured to be liquefied rapidly and the pressure of the oil storage tank is reduced.

Description

technical field [0001] The invention relates to the technical field of automobiles, internal fuel oil and power machinery, relates to a supply system for dimethyl ether used in compression ignition engines, and in particular to a dimethyl ether urban bus fuel return system. Background technique [0002] The oil resources in the world can still be exploited for 40 years, but in our country it is only 15-20 years. The research and application of petroleum alternative fuels is imminent. [0003] DME has a high cetane number and contains 34.8% oxygen. When used as an alternative fuel, NO X The emission is only about 30% of that of diesel fuel, and it can realize smokeless combustion in the full range of speed and load, and can meet Euro III and U.S. ultra-low emission (ULEV) standards, so it is an excellent environmentally friendly alternative fuel. DME can be directly synthesized by one-step method from coal vaporization, and has a wide range of sources. The cost of mass produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M21/10F02M33/08F02M37/00
CPCY02T10/30
Inventor 杨增清
Owner SHANGHAI ZHONGYOU ENTERPRISE GRP CO LTD