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Hydraulic amplifying type ultrahigh-pressure fuel supply device

A technology of fuel supply and hydraulic amplification, which is applied in the direction of fuel injection device, measuring device, charging system, etc. It can solve the problems of low fuel supply efficiency of fuel supply device, difficulty in increasing fuel injection pressure, and easy overheating of fuel, so as to improve the fuel supply. Oil efficiency and waste reduction effects

Inactive Publication Date: 2015-09-02
CHINA NORTH ENGINE INST TIANJIN
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] In order to solve the problems of low fuel supply efficiency of the fuel supply device, easy overheating of fuel oil, and difficulty in increasing fuel injection pressure in the above-mentioned fuel spray characteristic test, the present invention proposes a hydraulically amplified ultra-high pressure fuel supply device, which can realize ultra-high spray oil pressure (300MPa), and can better adapt to the test conditions of low injection interval

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Embodiment Construction

[0025] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] The present invention is a hydraulic amplification type ultra-high pressure fuel supply device, such as figure 1 As shown, it includes a hydraulic oil pump 2, a hydraulic oil tank 15, a pressure regulating valve 13, a fuel oil tank 7, an electronically controlled valve 8, a pressure amplification chamber 9, an electronically controlled three-way valve 10 and a controller 3,

[0027] like figure 2 As shown, there is a T-shaped piston 17 in the pressure amplification chamber 9, the upper part is the small piston head, and the lower part is the large piston head; The side of the small head of the piston can form several times the liquid pressure on the side of the large head of the piston; the side wall surfaces at both ends of the piston 17 are in contact with the inner wall surfaces of the T-shaped cavity in the pressure amplificatio...

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Abstract

The invention provides a hydraulic amplifying type ultrahigh-pressure fuel supply device. The hydraulic amplifying type ultrahigh-pressure fuel supply device comprises a hydraulic oil tank, a fuel oil tank, an electric control valve, a pressure amplifying cavity and an electric control three-way valve. A T-shaped piston is arranged in the pressure amplifying cavity, a return spring is arranged in the pressure amplifying cavity, and the pressure amplifying cavity is provided with a hydraulic oil inlet and outlet, a high-pressure oil outlet, a fuel oil inlet and an oil discharge outlet. the fuel oil inlet is communicated with the fuel oil tank via the electric control valve, the hydraulic oil inlet and outlet is communicated with the oil supply pipeline of the hydraulic oil tank via the electric control three-way valve, and the oil discharge outlet is communicated with an oil return pipeline of the hydraulic oil tank, and the high-pressure oil outlet is communicated with an oil injector. The hydraulic amplifying type ultrahigh-pressure fuel supply device has the advantages that by changing pressure in a low-pressure cavity, fuel oil pressure in the high-pressure cavity is adjustable continuously, and pressure value is not over 300 MPa. In addition, the hydraulic amplifying type ultrahigh-pressure fuel supply device can supply fuel oil according to needs without continuous operation when used for atomizing characteristic test with low injection intervals, waste of high-pressure fuel oil is reduced and oil supply efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of engine fuel supply, and in particular relates to a hydraulic amplification type ultra-high pressure fuel supply device. Background technique [0002] Reducing pollutant emissions and improving fuel economy are two major challenges facing the field of internal combustion engines. Among the many solutions, the use of high-pressure common rail to supply fuel and increase fuel injection pressure is an important technical route. Higher injection pressure helps the crushing process of fuel, which can improve the atomization quality of fuel, promote the full mixing of fuel and air, and improve the combustion effect in the engine cylinder, which can significantly improve the power, economy and emission of the engine. sex. Especially for diesel engines, in order to meet the increasingly stringent emission regulations, the fuel injection pressure of the high-pressure common rail fuel injection system has been incr...

Claims

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Application Information

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IPC IPC(8): F02M65/00F02M63/00
Inventor 白洪林王丽康强永平于波李云广刘玮檀丽宏尹艳君樊巨廷蔡忠周
Owner CHINA NORTH ENGINE INST TIANJIN
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