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A natural gas/diesel dual fuel injector with self-lubricating function

A natural gas and injector technology, which is applied to fuel injection devices, engine lubrication, charging systems, etc., can solve problems such as increased wear and lack of lubrication, and achieve the effect of improving service life, optimizing emission performance, and reducing injection wear.

Inactive Publication Date: 2018-01-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, natural gas and diesel oil reach their respective injection holes through different paths, which is conducive to precise control of injection, but the natural gas valve sleeve of the natural gas pipeline lacks lubrication when it moves, and the wear is intensified

Method used

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  • A natural gas/diesel dual fuel injector with self-lubricating function

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0039] The working principle of a natural gas / diesel dual fuel injector with self-lubricating function provided by the present invention is to inject a small amount of diesel oil (accounting for about 5%-10% of the total fuel) into the cylinder before the engine piston runs to the top dead center , the trace diesel oil is further compressed to be compression-ignited, and then natural gas is injected into the cylinder at a pressure of 15 MPa, forming a concentration-layered mixture around the trace diesel flame, and then burnt to perform work. The lubricating phase is carried out alternately between the diesel injection phase and the natural gas injection phase.

[0040] Therefore, the implementation method can be divided into three stages:

[0041] The first stage, the p...

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Abstract

The invention belongs to the field of natural gas engines and discloses a natural gas / diesel dual fuel injector with a self-lubricating function. The injector of the present invention includes an injector valve body, a natural gas valve sleeve and a needle valve; a spring A is provided on the upper side of the natural gas valve sleeve, and a spring B is provided on the upper side of the needle valve, both of which are vertical under the action of the spring force and the fuel pressure. Up and down movement; the natural gas valve sleeve, spring A, needle valve and spring B work in coordination in the injector valve body to realize the function of high-pressure injection of natural gas / diesel fuel. In particular, a lubricating diesel hole is opened inside the natural gas valve sleeve to penetrate into the joint surface between the natural gas valve sleeve and the natural gas valve seat to form oil film lubrication, which effectively solves the problem of poor lubricating performance of ordinary gas injectors.

Description

technical field [0001] The invention belongs to the field of natural gas engines, in particular to natural gas / diesel dual fuel injectors in natural gas engines. Background technique [0002] The energy crisis and environmental degradation have led to the widespread application of a large number of new alternative fuels in the internal combustion engine industry. Natural gas has the advantages of cleanness, environmental protection and low price, and has been used on a large scale in vehicle and marine engines. Natural gas engines can be divided into two types according to the type of fuel used, one is natural gas single-fuel engine, and the other is dual-fuel engine with natural gas as the main fuel. [0003] The main application areas of single-fuel natural gas engines are taxis and ordinary small and medium-sized ships. Its main working principle is to use low-pressure injection of natural gas in the intake port, mix with air, enter the cylinder, and be ignited by the sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M43/04F01M9/04F02M51/06
Inventor 王谦戴礼明姜鹏何志霞谭小强
Owner JIANGSU UNIV
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