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Generation system for adjusting fuel injection pressure in hyperpressure for diesel engine

A fuel injection and generation system technology, applied in the direction of fuel injection pumps, fuel injection devices, charging systems, etc., can solve the problems that the quality of parts is limited by material properties and processing accuracy, etc., to achieve extended service life, flexible control and adjustment, The effect of a reasonable system structure

Inactive Publication Date: 2006-12-06
TIANJIN UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to provide a diesel engine with an adjustable ultra-high pressure fuel injection pressure generation system whose design concept is different from that of the prior art, so that the fuel injection pressure of the fuel supply system can reach an ultra-high pressure of more than 2000 bar on the basis of medium pressure and can Flexible adjustment to solve the problem that the quality of parts in the existing ultra-high pressure technology is limited by material properties and machining accuracy, so as to facilitate the promotion and realization of ultra-high pressure common rail technology in my country

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  • Generation system for adjusting fuel injection pressure in hyperpressure for diesel engine

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] The accompanying drawing shows the principle diagram of the diesel engine adjustable ultra-high pressure fuel injection pressure generating system of the present invention. It can be seen from the figure that the system includes a pressure closed-loop feedback control circuit 5 composed of a low-pressure oil pump 16, an electronically controlled medium-pressure plunger pump 15, an electronic control unit 4, a pressure accumulator 9, a relief valve 8 and a pressure sensor 10, and a pressure closed-loop feedback control circuit 5 composed of a first An ultra-high pressure fuel injection circuit 17 composed of a check valve 3, the first two-position two-way solenoid valve 6, a supercharger 7, an ultra-high pressure oil pipe 2 and a fuel injector 1; The medium-pressure control plunger pump 15 is composed of a plunger coupling 11 and a second two-po...

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Abstract

The present invention discloses a diesel engine adjustable superhigh pressure fuel injection pressure generation system for automobile engine. Said system is composed of superhigh pressure fuel injection loop and pressure closed ring feedback control loop. The described superhigh pressure fuel injection loop includes a non-return valve, first two-position two-way electromagnetic valve, supercharger and injector, and the described pressure closed ring feedback control loop includes low-pressure fuel oil pump, electronically controlled medium-pressure plunger pump, accumulator, overflow valve, pressure sensor and electric control unit. Besides, said invention also provides its working principle and its operation method.

Description

technical field [0001] The invention relates to an ultra-high pressure fuel supply system of an automobile engine. technical background [0002] As we all know, electronically controlled high-pressure common rail technology is one of the advanced electronically controlled technologies for diesel engines. The high-pressure common rail system is mainly composed of an electronically controlled high-pressure plunger pump, a common rail pipe, an electronically controlled fuel injector, and a high-pressure oil pipe connecting the pump, the common rail pipe, and the fuel injector. The generation and adjustment process of the high pressure of the common rail pipe is to dynamically adjust the effective oil pressure stroke of the plunger by electronically controlling the closing time of the pressure control valve (PCV valve) at the oil inlet of the high pressure plunger pump, so as to control the pressure of the high pressure pump. The oil supply of the common rail pipe is realized. ...

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Application Information

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IPC IPC(8): F02M55/00F02M59/10F02M51/06F02M47/00
Inventor 苏万华刘斌裴毅强
Owner TIANJIN UNIV
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