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In-cylinder direct-spray high-pressure pump

A technology of direct injection and high-pressure pump in the cylinder, which is applied in the direction of fuel injection pump, fuel injection device, charging system, etc., to reduce the pressure bearing area, facilitate installation, and increase the oil intake.

Pending Publication Date: 2019-08-30
JIANGSU BATON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pressure relief valve structure of this patent still needs to be further improved to improve the sealing effect

Method used

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  • In-cylinder direct-spray high-pressure pump
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Embodiment Construction

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

[0030] as attached figure 1 to attach Figure 5 As shown, an in-cylinder direct-injection high-pressure pump of the present invention includes a pump body 1, and the pump body 1 is provided with an oil inlet and an oil outlet. An oil inlet 10 is provided at the oil inlet, and in order to prevent impurities from entering the engine, a filter screen 11 is provided in the oil inlet 10 .

[0031] The pump body 1 is provided with a pressure stabilizing chamber 4, a low pressure chamber 5, a high pressure chamber 6, a first connecting oil passage 7, a second connecting oil passage 8, a diaphragm assembly 9 is arranged in the stabilizing chamber 4, and the oil inlet and the stabilizing chamber The top of the pressure chamber 4 is connected, the inlet of the first connecting oil passage 7 is connected to the bottom of the pressure stabilizing chamber 4, and t...

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Abstract

The invention relates to an in-cylinder direct-spray high-pressure pump. The in-cylinder direct-spray high-pressure pump comprises a pump body, wherein an oil inlet and an oil outlet are formed in thepump body; a stable-pressure cavity, a low-pressure cavity, a high-pressure cavity, a first connecting oil path and a second connecting oil path are arranged in the pump body; the oil inlet communicates with the first connecting oil path through the stable-pressure cavity; the first connecting oil path communicates with the second connecting oil path through the low-pressure cavity and the high-pressure cavity in sequence; the second connecting oil path communicates with the oil outlet; a solenoid valve is arranged in the low-pressure cavity; a plunger piston device is arranged in the high-pressure cavity; the oil outlet is equipped with a pressure release valve; the pressure release cavity communicates with the low-pressure cavity or the high-pressure cavity; the pressure release valve comprises a sealing base with a through hole therein, a stud and a ball body arranged between the sealing base and the stud; the ball body and the sealing base can be connected in a sealing mode; the ball body is linked and matched with the stud; and a pressure release valve spring is arranged between the stud and the inner wall of the pressure release cavity. The pressure release valve structure is changed into spherical surface seal from plane seal, so that sealing effect is good, a sealing form is more stable, the closing effect is quicker, and oil supply efficiency of the high-pressure pumpis improved.

Description

technical field [0001] The invention belongs to the technical field of automobile engines, and in particular relates to an in-cylinder direct-injection high-pressure pump. Background technique [0002] An existing in-cylinder direct-injection high-pressure fuel injection pump includes a pump body. The pump body is provided with an oil inlet and an oil outlet. The pump body is provided with a pressure stabilizing chamber and a first connecting oil passage. , the second connecting oil passage, the oil inlet, the first connecting oil passage are connected to the pressure stabilizing chamber, the second connecting oil passage is connected to the oil outlet, and a diaphragm assembly is arranged in the pressure stabilizing chamber , also includes a solenoid valve for controlling the opening and closing of the first connecting oil passage and the second connecting oil passage, and the pump body is also provided with a valve for hydraulically entering and discharging the oil in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M59/46F02M59/48F02M59/02
CPCF02M59/466F02M59/48F02M59/462F02M59/02
Inventor 袁亚飞赵典秋吴振刘新冬刘劝汤丽
Owner JIANGSU BATON TECH CO LTD
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