Low oil-return type electromagnetic control oil sprayer

An electromagnetic control and fuel injector technology, which is applied in the direction of machines/engines, fuel injection devices, engine components, etc., can solve the problems of reduced pressure relief rate in the control chamber, increased fuel temperature in the fuel tank, and slower needle valve rise rate, etc. , to achieve the effects of saving compression work, speeding up pressure building and pressure relief, and reducing oil return

Inactive Publication Date: 2012-05-02
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still deficiencies in the existing electronically controlled fuel injectors, which need to be further optimized and improved: 1. When the fuel injector injects fuel, the oil inlet hole and the oil drain hole in the control chamber are connected, and the high-pressure oil is directly discharged after entering the control chamber into the low-pressure fuel tank, wasting the compression work of this part of the fuel; 2: The fuel will heat up during the process of being compressed, and the temper

Method used

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  • Low oil-return type electromagnetic control oil sprayer
  • Low oil-return type electromagnetic control oil sprayer
  • Low oil-return type electromagnetic control oil sprayer

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Experimental program
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Effect test

Embodiment approach 1

[0019] combine Figure 1~4 , solenoid valve body 10, electromagnet 11, coil 19, armature 12, stop ring 17, control spool return spring 18, double sealing surface control spool 14, large spring 13, spring seat 16, and control cavity 1 The electromagnetic valve control part 9 of the low oil return electromagnetic control injector is provided. The double sealing surface control spool 14 is clamped on the armature 12 by the stop ring 17 and connected as a whole, and moves together with the armature 12 through the electromagnetic force of the electromagnet 11 on the armature 12 . The control cavity 1 is processed with an oil inlet circuit, a sealed ball valve seat and an oil drain circuit. The oil inlet circuit is connected with the high-pressure oil pipe and the oil inlet hole on the spring seat 13. The road is connected. Injection nozzle 7, needle valve 6, limit orifice plate 20, tight cap 5, needle valve return spring 4, needle valve return spring seat 22, control piston 2 and...

Embodiment approach 2

[0023] Such as Figure 5 As shown, the inlet of the accumulator chamber 23 is connected with the high-pressure oil pipe, and the outlet is connected with the oil tank 21 and the oil inlet passage of the control chamber 15 . Electromagnetic valve body 10, electromagnet 11, coil 19, armature 12, stop ring 17, control spool reset spring 18, double sealing surface control spool 14, large spring 13, spring seat 16, and control cavity 1 jointly constitute The solenoid valve control part 9 of the low oil return accumulator type electromagnetic control injector. The double sealing surface control spool 14 is clamped on the armature 12 by the stop ring 17 and connected as a whole, and moves together with the armature 12 through the electromagnetic force of the electromagnet 11 on the armature 12 . The control cavity 1 is processed with an oil inlet circuit, a sealed ball valve seat and an oil drain circuit. The oil inlet circuit is connected with the outlet of the pressure storage cha...

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Abstract

The invention aims at providing a low oil-return type electromagnetic control oil sprayer, which comprises an electromagnetic valve part, a control piston, a return spring, an oil nozzle part which are installed in an oil sprayer body and connected in sequence. The control piston is installed in a control cavity body, and the electromagnetic valve part comprises a coil, an electromagnet, an armature, a control valve core return spring, a stop ring and a control valve core which are all installed in the electromagnetic valve body. The coil and the control valve core return spring are installed in the electromagnet connected with the armature, the control valve core is clamped on the armature through the stop ring, one end of the control valve core is connected with the control valve core return spring, and the other end of the control valve core is connected with the control cavity body. The low oil-return type electromagnetic control oil sprayer can close an oil inlet way of a control cavity during oil spraying process of the oil sprayer and prevent high pressure fuel oil from entering the control cavity so as to reduce oil return amount, save oil pump compression work of the fuel oil, reduce temperature rising of an oil tank, simultaneously improve oil spraying effect and economical performance and motive power performance of an engine.

Description

technical field [0001] The invention relates to a fuel injector of an engine fuel injection system. Background technique [0002] In recent years, the technology of electronically controlled fuel injectors for diesel engines has developed rapidly, and the application of electronically controlled fuel injectors has become an inevitable trend in the development of diesel engines. Due to the fast response characteristics of the high-speed solenoid valve, it can quickly and accurately control the fuel injection quantity and injection law of the diesel engine, so as to achieve the purpose of improving the economy, power and reducing harmful emissions of the diesel engine. [0003] The currently applied solenoid valve-controlled fuel injector divides the high-pressure fuel from the high-pressure oil pipe into two paths: one path enters the fuel tank below the needle valve of the injector, and the other path enters the control chamber above the control piston. When the solenoid va...

Claims

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Application Information

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IPC IPC(8): F02M51/06F02M61/18
Inventor 田丙奇范立云王昊白云文李明马修真宋恩哲
Owner HARBIN ENG UNIV
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