A large flow high pressure variable pump oil inlet valve

An oil inlet valve, variable pump technology, applied in the direction of fuel injection pump, charging system, fuel injection device, etc., can solve problems such as pressure fluctuation and hydraulic shock, and achieve the effect of satisfying demand, easy implementation and reasonable design

Active Publication Date: 2019-06-11
CHINA NORTH ENGINE INST TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2) Due to the increase of the fuel injection volume per cycle, large pressure fluctuations and hydraulic shocks will be caused, so the high-flow high-pressure common rail system needs to realize precise control of the fuel injection process and ensure the stability of the entire system pressure;

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  • A large flow high pressure variable pump oil inlet valve
  • A large flow high pressure variable pump oil inlet valve
  • A large flow high pressure variable pump oil inlet valve

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Embodiment Construction

[0028] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0030] In the embodiment of the present invention, the oil inlet valve of the large flow and high pressure variable pump, such as Figures 1 to 6 shown, including base 1, spring 2, valve block 3, O-ring 4 and inlet valve body 5,

[0031] The oil inlet valve body 5 is provided with the oil inlet valve upper chamber 6 and the oil inlet valve lower chamber 9, the valve block 3 is arranged in the oil inlet valve lower chamber 9, and the upper surface of the valve block 3 is connected to the oil inlet valve. The valve block sealing surface 8 is formed where the top surface of the lower chamber 9 contacts; the bottom surface of the valve block 3 is gap-fitted ...

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Abstract

The invention provides an oil inlet valve of a high-compactness, large-flow and high-pressure variable pump. The oil inlet valve comprises a base, a spring, a valve block and an oil inlet valve body. An oil inlet valve upper cavity and an oil inlet valve lower cavity which communicate are formed in the oil inlet valve body. The valve block is arranged in the oil inlet valve lower cavity. A valve block sealing face is formed at the contact position of the upper surface of the valve block and the top face of the oil inlet valve lower cavity. The bottom face of the valve block is in clearance fit with the base through the spring. A base sealing face is formed at the contact position of the outer edge of the upper surface of the base and the bottom of the oil inlet valve body. An oil inlet communicating with the oil inlet valve upper cavity is formed in the oil inlet valve body. An oil outlet hole communicating with the oil inlet valve lower cavity is formed in the base. Compared with the prior art, the oil inlet valve has the following beneficial effects that by means of the oil inlet valve, the low-pressure fuel oil inlet efficiency of the oil inlet valve can be improved under the condition that the size of the oil inlet valve is not changed, and the requirement of the large-flow variable pump for the instant large-flow low-pressure fuel oil is met.

Description

technical field [0001] The invention belongs to the technical field of engine fuel injection systems, and in particular relates to an oil inlet valve of a large flow and high pressure variable pump. Background technique [0002] Compared with the high pressure common rail fuel injection system for medium and small power diesel engines, the high flow high pressure common rail system for high power diesel engines with a cylinder diameter of ≥ 150mm faces new features: [0003] 1) With the increase of power, the demand of high-power diesel engine for the fuel supply of high-pressure common rail system is much greater than that of medium and small power diesel engines; [0004] 2) Due to the increase of the fuel injection volume per cycle, large pressure fluctuations and hydraulic shocks will be caused, so the high-flow high-pressure common rail system needs to achieve precise control of the fuel injection process and ensure the stability of the entire system pressure; [0005]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M59/46
CPCF02M59/464
Inventor 李汝宁高怡吕帆李华乐徐春龙赵中余
Owner CHINA NORTH ENGINE INST TIANJIN
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