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Oil inlet valve for high pressure oil pump and corresponding high pressure oil pump

A high-pressure oil pump and oil inlet valve technology, applied in fuel injection pumps, charging systems, fuel injection devices, etc., can solve problems such as damage to the oil inlet valve core, oil inlet valve seat, impact on fuel delivery flow, and long fuel flow path , to achieve the effect of reducing throttling, improving suction efficiency and reducing damage

Active Publication Date: 2022-08-05
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the fuel flow path is longer, which has a greater throttling effect and affects the fuel delivery flow
When the oil inlet valve is closed, the oil inlet valve core 2 is not cushioned, so its closing speed is very high, which may damage the oil inlet valve core 2 and even the oil inlet valve seat 4

Method used

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  • Oil inlet valve for high pressure oil pump and corresponding high pressure oil pump
  • Oil inlet valve for high pressure oil pump and corresponding high pressure oil pump
  • Oil inlet valve for high pressure oil pump and corresponding high pressure oil pump

Examples

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Embodiment Construction

[0015] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and multiple embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the protection scope of the present invention.

[0016] figure 2 A side sectional view of a high pressure oil pump according to a preferred exemplary embodiment of the present invention is shown.

[0017] like figure 2 As shown, the high-pressure oil pump includes a cam drive mechanism 11 and a plunger pump 12 driven by the cam drive mechanism 11 . The plunger pump 12 includes a plunger sleeve 13 and a plunger 14 that reciprocates in the plunger sleeve 13 . The oil inlet valve 15 is provided above the plunger 14 in the plunger sleeve 13 to draw the fuel to b...

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PUM

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Abstract

An oil inlet valve for high -pressure oil pump is disclosed, including: oil inlet valve core, which includes contacting the shoulder;At the edge of the oil inlet valve seat, the shoulder -to -shoulder can seal and contact or stay away from the oil inlet valve to achieve the closure or opening of the oil inlet valve. Among themThe fuel in the oil pores is connected to the oil inlet valve seat when the oil inlet valve is opened when the oil inlet valve is opened to the oil inlet valve seat;The hydraulic buffer structure of the off -time movement contains at least the dead area between the bottom of the oil inlet valve core and the bottom of the receiving cavity. There is a buffer fluid in the dead area.A high -pressure oil pump including this oil -in -in -law was also disclosed.According to the present invention, the length of the flowing path of the fuel in the oil inlet valve is reduced, and the closed speed of the oil -entering valve core through the hydraulic buffer structure can be reduced.

Description

technical field [0001] The invention relates to an oil inlet valve for a high pressure oil pump and a corresponding high pressure oil pump. Background technique [0002] The high-pressure fuel pump of the engine is used to pressurize the fuel from low pressure to high pressure and then deliver it to the common rail. At present, high-pressure oil pumps are widely used in the form of plunger pumps. The plunger pump relies on the reciprocating motion of the plunger in the plunger sleeve to make the volume of the sealed working chamber change periodically to achieve oil absorption and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment. [0003] In the current high-pressure oil pump, the oil inlet valve and the oil outlet valve are also arranged in the plunger sleeve. The oil inlet valve includes an oil inlet valve body and an oil inlet valve core that can move relative to the oil inlet va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M59/46
CPCF02M59/46
Inventor 张建新成小磊周奇
Owner ROBERT BOSCH GMBH
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