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A control body of a cone-surface sealed high-pressure common rail injector

A high-pressure common rail, conical surface sealing technology, applied in the direction of fuel injection device, machine/engine, charging system, etc., can solve the problems of static leakage of oil return hole plane seal, large leakage of control cavity switching, etc., to achieve high-pressure sealing , the effect of reducing switching leakage and reducing power loss

Active Publication Date: 2019-05-14
CHINA NORTH ENGINE INST TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of serious static leakage of the plane seal of the oil return hole of the conventional high-pressure common rail injector and large leakage of the control chamber switching, the present invention proposes a control body of a cone-surface sealed high-pressure common rail injector

Method used

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  • A control body of a cone-surface sealed high-pressure common rail injector
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  • A control body of a cone-surface sealed high-pressure common rail injector

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Embodiment Construction

[0018] like figure 1 As shown, a control body of a cone-surface sealed high-pressure common rail injector includes an adjusting screw 1, a solenoid valve nut 2, a valve core bushing 3, a washer 4, an electromagnet 5, an electromagnet spring seat 6, and an armature 7 , bushing 8, orifice plate 9, control cavity return spring 11, control plunger 12, injector body 16, adjusting pad 18, valve core 19, first O-ring 20, second O-ring 21, The electromagnet spring 22, the third O-ring 23, the injector body 16 is provided with a stepped hole in the axial direction, and the bottom of the large hole of the stepped hole in the injector body 16 is provided with a low-pressure oil chamber 17 and a return valve along the circumference. The oil tank 25, the lower part of the injector body 16 are provided with the main oil passage 13, the oil inlet 14, the oil inlet hole 15 of the control chamber, the main oil passage 13 communicates with the oil inlet 15 of the control chamber through the oil...

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Abstract

The invention relates to a conical surface sealed high pressure common rail fuel injector controller. A low pressure oil cavity (17) and an oil return groove (25) are formed in the bottom of a large hole of a stepped hole in a fuel injector body (16) in the circumferential direction, a main oil duct (13) is communicated with a control cavity oil inlet hole (15) through an oil inlet (14), an adjusting screw (1) is arranged on the upper portion of a through hole of a valve element bush (3), the adjusting screw (1) is connected with the valve element bush (3) through an electromagnetic valve nut (2), one end of the adjusting screw (1) is connected with an electromagnet spring seat (6), an adjusting cushion block (18) is arranged at the lower end of an electromagnet (5), a bush (8) is arranged in a small hole of the stepped hole, a hole plate (9) located above the control cavity oil inlet hole (15) is connected with the lower end of the bush (8), and a control plunger (12) and the hole plate (9) are connected through a control cavity return spring (11). The conical surface sealed high pressure common rail fuel injector controller is small in leakage, the oil supply efficiency of a high pressure common rail oil supply system is improved, and the flexibility of the system is enhanced.

Description

technical field [0001] The invention belongs to the technical field of engine fuel injection systems, and in particular relates to a control body of a cone-surface sealed high-pressure common rail fuel injector. Background technique [0002] In order to meet the requirements of the engine emission regulations and improve the economy and controllability, the requirements for the flexibility of the injection characteristics of the fuel injection system are getting higher and higher. The purpose is to achieve high-efficiency combustion and clean emissions at all operating points of the engine, and a matching fuel system is required. The fuel can be injected into the cylinder of the engine in a fixed and quantitative manner according to the established fuel injection law, and it can be well mixed with the compressed air in the cylinder after being fully atomized. The matching of fuel injection law and ventilation process is the main research approach to improve combustion perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M51/06F02M61/06
Inventor 李汝宁高怡孙勇
Owner CHINA NORTH ENGINE INST TIANJIN
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