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Rail pressure regulating valve for common-rail system

A common rail system and regulating valve technology, applied in the field of rail pressure regulating valve, can solve the problems of poor transient response, complex control algorithm, large energy loss, etc. Effect

Inactive Publication Date: 2016-11-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of poor transient response, large energy loss and complicated control algorithm in the prior art, and provide a rail pressure regulating valve for common rail system, which can increase the rail pressure of common rail system. Adjusted transient response speed, reduced energy loss, simplified rail pressure control algorithm

Method used

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  • Rail pressure regulating valve for common-rail system

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Embodiment Construction

[0023] In order to better illustrate the purpose and advantages of the present invention, the content of the invention will be further described below in conjunction with the accompanying drawings and examples.

[0024] A rail pressure regulating valve 13 for a common rail system includes: a metering valve 11 and a feedback valve 12 .

[0025] The metering valve 11 is composed of a valve body 3, a spring 4, a valve core 5, a metering valve housing 6, an excitation coil 7 and a disc-shaped armature 8; Hole 3.2, oil inlet hole 3.1 is opened on the side wall; spring 4 is placed between valve body 3 and valve core 5, and is initially pre-compressed by valve core 5; valve core 5 is placed inside valve body 3, and can be rotated The valve core 5 is provided with a throttling hole 5.1, which matches the oil inlet hole 3.1, and the axial movement of the valve core 5 will change the through area between the oil inlet hole 3.1 and the throttle hole 5.1, thereby The opening of the valve...

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Abstract

The invention relates to a rail pressure regulating valve, in particular to a rail pressure regulating valve for a common-rail system, and belongs to the field of fuel injection systems of internal combustion engines. The rail pressure regulating valve comprises a metering valve and a feedback valve, wherein the metering valve is mounted between the outlet of a low-pressure oil pump and the inlet of a high-pressure oil pump; the feedback valve is connected with a common-rail pipe through a high-pressure oil pipe; the metering valve and the feedback valve are linked through screw threads on a metering valve shell and a feedback valve shell; the upper end of a valve core of the metering valve and the lower end of a valve rod of the feedback valve are rigidly connected together through interference fit; and a disc-type armature of the metering valve and the valve rod of the feedback valve are linked through the screw threads or rigidly connected together through interference fit. The rail pressure regulating valve provided by the invention is served as a feedback rail pressure regulating valve, and has the characteristics that the transient response is quick, the energy loss is low, and the rail pressure control algorithm is greatly simplified.

Description

technical field [0001] The invention relates to a rail pressure regulating valve, in particular to a rail pressure regulating valve used in a common rail system, and belongs to the field of fuel injection systems of internal combustion engines. Background technique [0002] "Energy saving and emission reduction, increasing power density" is the goal that the field of internal combustion engines has been pursuing. The electronically controlled high-pressure common rail fuel injection system (common rail system for short) is the most potential technology in the internal combustion engine industry to achieve this goal. Its biggest feature is that the fuel injection pressure, fuel injection volume, and fuel injection timing can be precisely adjusted and controlled. The essence of the control and adjustment of fuel injection pressure is the control of rail pressure. The rail pressure needs to change according to the operating conditions of the engine, and also needs to be relati...

Claims

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Application Information

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IPC IPC(8): F02M63/00F02M59/34
CPCF02M59/34F02M63/0017F02M63/0049F02M63/0061
Inventor 钱德省廖日东王尚勇向建华
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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