CN216381676U

CN216381676U - Fuel injection nozzle for diesel engine capable of improving fuel atomization performance

Info

Publication number: CN216381676U
Application number: CN202122544073.5U
Authority: CN
Inventors: 余守真; 高元煦; 张季任
Original assignee: Nantong Siwei Power Machinery Technology Co ltd
Current assignee: Nantong Siwei Power Machinery Technology Co ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-04-26
Anticipated expiration: 2031-10-22

Abstract

The utility model discloses an oil nozzle for a diesel engine, which can improve the fuel atomization performance and is a needle valve type oil nozzle; when oil injection is stopped, the contact point of the front part of the oil needle and the valve seat forms a sealing structure with the valve seat, and the port of the oil needle is in a flange form. The utility model has good fuel atomization performance and uniform mixing of oil and air.

Description

Fuel injection nozzle for diesel engine capable of improving fuel atomization performance

Technical Field

The utility model relates to an oil nozzle for a diesel engine.

Background

Although the diesel engine has carbon emission (CO) compared with the gasoline engine with the same equivalent weight₂CO) is low, but the emission of NOx and particulate matters is high, so that the increasingly stringent pollutant emission standard of internal combustion engines in countries around the world is difficult to meet. The diesel engine has high pollutant emission, and most of the reasons are that oil atomization is poor during a power stroke, so that diesel oil is incompletely combusted. In order to solve the problem of atomization of the oil nozzle, it is a common practice internationally to use high-pressure injection or fine-hole injection. The high-pressure injection system has high oil injection pressure, fine oil beam and good atomization effect, but has complex structure, difficult maintenance and large energy consumption, is not beneficial to work in severe environment and is sacrificialThe diesel engine has the advantages of simple structure and reliable performance. The multi-pore injection is beneficial to uniformly mixing fuel and air, improves the atomization effect to a certain extent, and solves the problem of pollutant emission of a diesel engine, but the pore diameter is small, so that the penetration distance of an oil beam under high load is small, the pores are easily blocked by carbon deposition, and the negative effect cannot be ignored.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide the oil nozzle for the diesel engine, which has good fuel oil atomization performance and can uniformly mix oil and air and improve the fuel atomization performance.

The technical solution of the utility model is as follows:

a kind of fuel spray nozzle for diesel engine which promotes fuel atomization performance, it is a needle valve type fuel spray nozzle; when stopping oil spout, the contact point of oil needle front portion and disk seat forms seal structure, characterized by with the disk seat: the oil needle port is in the form of a flange.

The flange is an integral ring.

The utility model changes the structure of the end of the oil needle on the basis of the common needle valve type oil nozzle, so that the fuel oil collides with the flange of the port at high pressure and high speed and is atomized intensively. In addition, the annular oil beams are guided to be separated at a certain included angle, so that the problem of uneven air mixing caused by the crossing of the oil beam injection paths is solved. By comprehensively improving the fuel atomization and combustion processes, the fuel efficiency and the engine performance are improved, and the pollutant emission is reduced.

Drawings

The utility model is further illustrated by the following figures and examples.

Fig. 1 is a schematic view of a needle valve type fuel injection nozzle commonly available on the market.

Fig. 2 is a schematic structural diagram of an embodiment of the present invention.

Fig. 3 is a partially enlarged view of fig. 2.

The oil needle comprises an oil needle 1, an oil needle contact point 2, a common oil needle port 3, a flange type oil needle port 4, an oil inlet channel 5 and a valve seat 6.

Detailed Description

Fig. 1 shows a needle valve type fuel injection nozzle which is commonly available on the market. Fuel is injected into the valve seat 6 through the fuel inlet passage 5 and stored in the gap with the oil needle 1. When oil is sprayed, the contact point 2 is lifted, the oil path is smooth, and high-pressure fuel oil is sprayed out from the lower end part of the oil needle 1. When oil injection is stopped, the oil needle contact point 2 and the valve seat 6 form a sealing structure, and fuel oil is stored in a gap between the valve seat 6 and the oil needle 1.

On the basis of fig. 1, the oil needle port is a flange-type oil needle port 4. The fuel is caused to hit the port flange at high pressure and high speed and is atomized intensively. In addition, the annular oil beams are guided to be separated at a certain included angle, so that the problem of uneven air mixing caused by the crossing of the oil beam injection paths is solved.

The flange is in the form of an integral ring or partial flange.

Claims

1. A kind of fuel spray nozzle for diesel engine which promotes fuel atomization performance, it is a needle valve type fuel spray nozzle; when stopping oil spout, the contact point of oil needle front portion and disk seat forms seal structure, characterized by with the disk seat: the oil needle port is in the form of a flange.

2. The fuel injection nozzle for a diesel engine according to claim 1, wherein the fuel injection nozzle comprises: the flange is an integral ring.