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Fuel injection valve and engine

A technology for fuel injection valves and valve sleeves, which is applied to fuel injection devices, engine components, machines/engines, etc. It can solve the problems of slow oil intake speed, long delay time for closing fuel injection valves, and affecting engine performance, etc., and achieves improvement. Response speed, effect of shortening off delay time

Active Publication Date: 2019-12-03
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there is only one oil inlet hole connected between the control chamber and the high-pressure chamber, resulting in a relatively slow oil inlet speed when the high-pressure oil in the high-pressure chamber enters the control chamber, and the delay time for closing the fuel injection valve is long. The nozzle hole closes slowly, which affects the working performance of the engine

Method used

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  • Fuel injection valve and engine
  • Fuel injection valve and engine
  • Fuel injection valve and engine

Examples

Experimental program
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Embodiment 1

[0043] This embodiment provides an engine. The engine includes a fuel injection valve for injecting fuel into the combustion chamber of each cylinder of the engine.

[0044] See Figure 1-Figure 6 The fuel injection valve provided in this embodiment includes an injection valve body 1, a valve sleeve 2 and a needle valve 3.

[0045] The injection valve body 1 has a high-pressure chamber 11 for containing fuel. An oil inlet 14 communicating with the high-pressure chamber 11 is opened on the side wall of the injection valve body 1. The fuel enters the high-pressure chamber 11 through the oil inlet 14. The two ends of the high-pressure chamber 11 have openings, one end of the high-pressure chamber 11 is blocked by the valve sleeve 2, and the other end is provided with a nozzle 12, and the end of the nozzle 12 is provided with a spray hole 4, which can be selectively opened or closed , Making the fuel injection valve open or closed. When the fuel injection valve is in an open state, i...

Embodiment 2

[0068] See Figure 7 The difference between this embodiment and the first embodiment is that the oblique oil outlet orifice 23 includes a second counterbore 234, a second tapered hole 235, a transition hole 236, and a second orifice 237 that are connected in sequence. The second counterbore 234 directly communicates with the high-pressure chamber 11, the large end opening of the second tapered hole 235 communicates with the second counterbore 234, the small end opening of the second tapered hole 235 is connected to the transition hole 236, and the second throttle The aperture of the hole 237 is smaller than the aperture of the transition hole 236. Specifically, in this embodiment, the second throttle hole 237 communicates with the upper counterbore 71 of the oil outlet hole 7.

[0069] In this embodiment, when the electromagnet 821 is de-energized, the sealing steel ball 81 is pressed against the sealing cone surface of the tapered low-pressure chamber 26 and the upper end of the...

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Abstract

The invention discloses a fuel injection valve and an engine, and belongs to the technical field of engines, and the fuel injection valve comprises an injection valve body which is provided with a high-pressure cavity for accommodating fuel oil; a valve sleeve which is arranged in the high-pressure cavity, wherein a containing cavity is formed in the valve sleeve; and a needle valve which is arranged in the high-pressure cavity, wherein one end is located in the containing cavity and the needle valve is matched with the containing cavity to form a control cavity, and the other end of the needle valve is located at the end, away from the control cavity, of the high-pressure cavity; an oblique oil outlet throttling hole is formed in the valve sleeve; an oil inlet throttling hole is formed inthe other side, opposite to the oblique oil outlet throttling hole, of the valve sleeve, the oblique oil outlet throttling hole and the oil inlet throttling hole enable the high-pressure cavity and the control cavity to be in one-way communication, the hydraulic pressure of the end, located in the control cavity, of the needle valve is increased, and then the needle valve is pushed to move so that the needle valve can close the fuel injection valve. The engine is provided with the fuel injection valve. The fuel injection valve can be quickly closed.

Description

Technical field [0001] The invention relates to the technical field of engine fuel injection, in particular to a fuel injection valve and an engine. Background technique [0002] Generally, fuel injection valves are installed in fuel engines. [0003] The fuel injection valve is used to inject fuel into the combustion chamber of each cylinder of the fuel engine. The fuel injection valve is generally provided with a needle valve, which is located in the high-pressure chamber and can open and close the nozzle hole of the fuel injection valve. Generally, the movement of the needle valve causes the needle valve to open or close the nozzle hole of the fuel injection valve. The needle valve is partly located in the high-pressure cavity of the fuel injection valve and can block the nozzle hole, and the other part is located in the control cavity of the valve sleeve of the fuel injection valve. The needle valve is located at the end of the control cavity and the receiver located at the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/10F02M61/16F02M61/18
CPCF02M61/10F02M61/16F02M61/1886
Inventor 喻鸣显金昱森徐亚磊王凌云顾小磊张建刚王华
Owner FAW JIEFANG AUTOMOTIVE CO
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