CN109826738B - Dual-fuel injector - Google Patents

Dual-fuel injector Download PDF

Info

Publication number
CN109826738B
CN109826738B CN201910140984.6A CN201910140984A CN109826738B CN 109826738 B CN109826738 B CN 109826738B CN 201910140984 A CN201910140984 A CN 201910140984A CN 109826738 B CN109826738 B CN 109826738B
Authority
CN
China
Prior art keywords
oil
nozzle
air
injector
air nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910140984.6A
Other languages
Chinese (zh)
Other versions
CN109826738A (en
Inventor
张礼林
汪祥本
夏少华
杨翔宇
高广新
袁秋玲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FAW Jiefang Automotive Co Ltd
Original Assignee
FAW Jiefang Automotive Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FAW Jiefang Automotive Co Ltd filed Critical FAW Jiefang Automotive Co Ltd
Priority to CN201910140984.6A priority Critical patent/CN109826738B/en
Publication of CN109826738A publication Critical patent/CN109826738A/en
Application granted granted Critical
Publication of CN109826738B publication Critical patent/CN109826738B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Fuel-Injection Apparatus (AREA)

Abstract

The invention relates to an automobile diesel engine ejector, in particular to a dual-fuel ejector, and belongs to the technical field of automobile diesel engine ejectors. The nozzle is arranged at the lower end of the oil injector, the outer ring of the nozzle is provided with the nozzle tightening cap, and the nozzle tightening cap is connected to the lower end of the oil injector body through threads and tightly presses the nozzle on the oil injector; the side surface of the oil sprayer body is provided with an air inlet, the lower end surface of the oil sprayer body is provided with a circle of diffusion grooves along the circumferential direction, and the oil sprayer body is internally provided with an air inlet channel communicated with the air inlet and the diffusion grooves; and a plurality of oil nozzle air passages which are communicated up and down are arranged in the oil nozzle, the upper end of each oil nozzle air passage is communicated with the diffusion groove, and the lower end of each oil nozzle air passage is communicated with the air nozzle air jet. The invention has simple, compact and reasonable structure, can achieve the aim of reducing the emission, can fully combust the diesel oil and reduce the emission of soot; the system can meet the requirements of different areas and different customers according to the conditions of price change, reserve distribution, convenience and the like of oil and gas.

Description

Dual-fuel injector
Technical Field
The invention relates to an automobile diesel engine ejector, in particular to a dual-fuel ejector, and belongs to the technical field of automobile diesel engine ejectors.
Background
In the prior art, a single fuel injection device is generally adopted in an internal combustion engine, and few injectors capable of injecting two or more fuels are available. The injector capable of injecting two or more kinds of fuel is suitable for low-pressure engines only by combining two kinds of fuel injectors with separate structures for injection.
Disclosure of Invention
The invention aims to overcome the defects, and provides a dual-fuel injector which can perform dual-fuel injection under the condition of not changing the structure of a combustion chamber of an internal combustion engine so as to reduce the emission of the engine and meet the requirement of environmental protection.
According to the technical scheme provided by the invention, the dual-fuel injector comprises an oil injector body, an oil injection nozzle, a needle valve and an oil injection nozzle tightening cap, wherein an oil inlet cavity is formed in the center of the oil injector body, and the needle valve capable of sliding up and down is arranged in the oil inlet cavity; the lower extreme of injector is equipped with the fuel sprayer, and the fuel sprayer outer lane is equipped with the tight cap of fuel sprayer, and the tight cap of fuel sprayer passes through threaded connection at injector lower extreme and compresses tightly the fuel sprayer at injector lower extreme, and the needle valve lower extreme stretches into in the fuel sprayer, characterized by: the fuel injector also comprises an air nozzle and an air nozzle tightening cap, wherein the air nozzle is arranged at the lower end of the fuel injector, the air nozzle tightening cap is arranged on the outer ring of the air nozzle, and the air nozzle tightening cap is connected to the lower end of the fuel injector body through threads and tightly presses the air nozzle on the fuel injector; the side surface of the oil sprayer body is provided with an air inlet, the lower end surface of the oil sprayer body is provided with a circle of diffusion grooves along the circumferential direction, and the oil sprayer body is internally provided with an air inlet channel communicated with the air inlet and the diffusion grooves; and a plurality of oil nozzle air passages which are communicated up and down are arranged in the oil nozzle, the upper end of each oil nozzle air passage is communicated with the diffusion groove, and the lower end of each oil nozzle air passage is communicated with the air nozzle air jet.
Furthermore, an oil inlet communicated with the oil inlet cavity is formed in the side face of the oil sprayer body.
Further, an air faucet spring is arranged between the air faucet and the air faucet tightening cap, and the air faucet tightening cap keeps elastic pressing on the air faucet through the air faucet spring.
Further, an air nozzle lining ring is arranged on the outer ring of the air nozzle spring.
Further, a plurality of nozzle tip air flues are evenly distributed along the fuel sprayer circumferencial direction.
Further, the tight cap of fuel sprayer is wrapped inside by the tight cap of fuel sprayer.
Compared with the prior art, the invention has the following advantages:
the invention has simple, compact and reasonable structure, can achieve the aim of reducing the emission, can fully combust the diesel oil and reduce the emission of soot; the system can meet the requirements of different areas and different customers according to the conditions of price change, reserve distribution, convenience and the like of oil and gas.
Drawings
FIG. 1 is a front view of a half-section of the present invention.
Description of reference numerals: 1-oil sprayer body, 2-oil sprayer, 3-needle valve, 4-oil sprayer locking cap, 5-air nozzle, 6-air nozzle spring, 7-air nozzle locking cap, 8-air nozzle lining ring, 9-oil inlet, 10-air inlet, 11-air inlet, 12-diffusion groove and 13-oil sprayer air passage.
Detailed Description
The invention will be further described with reference to examples in the drawings to which:
as shown in figure 1, the invention mainly comprises an oil injector body 1, an oil injector 2, a needle valve 3 and an oil injector locking cap 4, wherein an oil inlet cavity is arranged at the center of the oil injector body 1, and the needle valve 3 capable of sliding up and down is arranged in the oil inlet cavity.
The lower end of the injector body 1 is provided with an oil nozzle 2, the outer ring of the oil nozzle 2 is provided with an oil nozzle tightening cap 4, and the oil nozzle tightening cap 4 is connected to the lower end of the injector body 1 through threads and tightly presses the oil nozzle 2 to the lower end of the injector body 1. The lower end of the needle valve 3 extends into the oil nozzle 2.
The side surface of the oil injector body 1 is provided with an oil inlet 9 communicated with the oil inlet cavity, injected fuel enters the oil inlet cavity through the oil inlet and then enters the oil nozzle along the needle valve, and the fuel is sprayed out of the oil nozzle through the control of the needle valve.
The fuel injector also comprises an air tap 5 and an air tap fastening cap 7, wherein the air tap 5 is arranged at the lower end of the fuel injector 2, the air tap fastening cap 7 is arranged on the outer ring of the air tap 5, and the air tap fastening cap 7 is connected to the lower end of the fuel injector body 1 through threads and tightly presses the air tap 5 on the fuel injector 2. The nozzle tightening cap 7 covers the oil nozzle tightening cap 4.
An air nozzle spring 6 is arranged between the air nozzle 5 and the air nozzle tightening cap 7, and the air nozzle tightening cap 7 keeps elastic compression on the air nozzle 5 through the air nozzle spring 6.
An air nozzle lining ring 8 is arranged on the outer ring of the air nozzle spring 6, and the maximum opening degree of the air nozzle is controlled by the air nozzle lining ring 8.
The side of the oil injector body 1 is provided with an air inlet 10, the lower end face of the oil injector body 1 is provided with a circle of diffusion grooves 12 along the circumferential direction, and an air inlet 11 for communicating the air inlet 10 with the diffusion grooves 12 is arranged in the oil injector body 1. A plurality of vertically-through oil nozzle air passages 13 are arranged in the oil nozzle 2, and the oil nozzle air passages 13 are uniformly distributed along the circumferential direction of the oil nozzle 2. The upper end of the oil nozzle air passage 13 is communicated with the diffusion groove 12, and the lower end of the oil nozzle air passage 13 is communicated with an air nozzle 5.
The injected fuel gas enters an air inlet channel of the fuel injector body through an air inlet, is diffused into each fuel nozzle air passage of the fuel injector through a diffusion groove, and is finally sprayed out from the air nozzle.
The oil nozzle structure of the invention normally injects diesel oil through electromagnet control, namely the electromagnet controls the opening and closing of a needle valve to complete the injection and the closing of the oil nozzle so as to inject fuel oil into a combustion chamber of an engine and carry out compression combustion in the combustion chamber. The structure of the original oil sprayer is improved, a set of air nozzle structure is added, the air nozzle structure is fastened on an oil nozzle fastening cap through an air nozzle fastening cap, fuel gas is controlled to enter through an air inlet channel through another set of electromagnet, an air nozzle spring is jacked open through pressure difference fuel gas, the maximum opening degree of the air nozzle is controlled by an air nozzle lining ring, the fuel gas is sprayed into a combustion chamber after the air nozzle is opened, and the sprayed fuel gas is rapidly ignited by compression ignition diesel oil flame to complete combustion work. The diesel fuel injected at the beginning plays the role of ignition. When the price of diesel on the market is cheaper than that of gas, a pure diesel combustion mode can be selected.
The invention improves the traditional oil sprayer, is additionally provided with a set of air nozzle structure, can realize free control of fuel injection and fuel gas injection under the condition of high pressure, and adopts a reasonable injection strategy according to different working conditions.
The invention has simple, compact and reasonable structure, can achieve the aim of reducing the emission, can fully combust the diesel oil and reduce the emission of soot; the system can meet the requirements of different areas and different customers according to the conditions of price change, reserve distribution, convenience and the like of oil and gas.

Claims (5)

1. A dual-fuel injector comprises an oil injector body (1), an oil injection nozzle (2), a needle valve (3) and an oil injection nozzle tightening cap (4), wherein an oil inlet cavity is formed in the center of the oil injector body (1), and the needle valve (3) capable of sliding up and down is arranged in the oil inlet cavity; injector (1) lower extreme is equipped with fuel sprayer (2), and fuel sprayer (2) outer lane is equipped with the tight cap of fuel sprayer (4), and the tight cap of fuel sprayer (4) compresses tightly injector (2) lower extreme at injector (1) through threaded connection at injector (1) lower extreme and with fuel sprayer (2), and needle valve (3) lower extreme stretches into in injector (2), characterized by: the oil nozzle device further comprises an air nozzle (5) and an air nozzle tightening cap (7), wherein the air nozzle (5) is arranged at the lower end of the oil nozzle (2), the air nozzle tightening cap (7) is arranged on the outer ring of the air nozzle (5), and the air nozzle tightening cap (7) is connected to the lower end of the oil injector body (1) through threads and tightly presses the air nozzle (5) on the oil nozzle (2); the side surface of the oil sprayer body (1) is provided with an air inlet (10), the lower end surface of the oil sprayer body (1) is provided with a circle of diffusion grooves (12) along the circumferential direction, and an air inlet channel (11) communicated with the air inlet (10) and the diffusion grooves (12) is arranged in the oil sprayer body (1); a plurality of vertically-through oil nozzle air passages (13) are arranged in the oil nozzle (2), the upper end of each oil nozzle air passage (13) is communicated with the diffusion groove (12), and the lower end of each oil nozzle air passage (13) is communicated with an air nozzle (5) air nozzle; an air nozzle spring (6) is arranged between the air nozzle (5) and the air nozzle tightening cap (7), and the air nozzle tightening cap (7) keeps elastic compression on the air nozzle (5) through the air nozzle spring (6).
2. A dual fuel injector as claimed in claim 1 wherein: and an oil inlet (9) communicated with the oil inlet cavity is formed in the side surface of the oil sprayer body (1).
3. A dual fuel injector as claimed in claim 1 wherein: and an air nozzle lining ring (8) is arranged on the outer ring of the air nozzle spring (6).
4. A dual fuel injector as claimed in claim 1 wherein: the plurality of oil nozzle air passages (13) are uniformly distributed along the circumferential direction of the oil nozzle (2).
5. A dual fuel injector as claimed in claim 1 wherein: the nozzle tightening cap (7) covers the oil nozzle tightening cap (4).
CN201910140984.6A 2019-02-26 2019-02-26 Dual-fuel injector Active CN109826738B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910140984.6A CN109826738B (en) 2019-02-26 2019-02-26 Dual-fuel injector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910140984.6A CN109826738B (en) 2019-02-26 2019-02-26 Dual-fuel injector

Publications (2)

Publication Number Publication Date
CN109826738A CN109826738A (en) 2019-05-31
CN109826738B true CN109826738B (en) 2020-10-23

Family

ID=66864506

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910140984.6A Active CN109826738B (en) 2019-02-26 2019-02-26 Dual-fuel injector

Country Status (1)

Country Link
CN (1) CN109826738B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110344976B (en) * 2019-07-29 2021-03-26 大连民族大学 Working method of diesel oil and natural gas dual-fuel engine nozzle
CN110905703A (en) * 2019-11-25 2020-03-24 一汽解放汽车有限公司 Dual-fuel injector
CN111535957B (en) * 2020-05-29 2021-04-20 一汽解放汽车有限公司 Integrated dual-fuel injector and injection method thereof
CN111535955B (en) * 2020-05-29 2021-04-27 一汽解放汽车有限公司 Quick-response dual-fuel injection valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0874698A (en) * 1994-09-12 1996-03-19 Mitsubishi Heavy Ind Ltd Binary injection valve of diesel engine
CN103168163A (en) * 2010-08-11 2013-06-19 现代重工业株式会社 Two-stage fuel injection valve
CN103967674A (en) * 2014-04-24 2014-08-06 中国北方发动机研究所(天津) Diesel premixing natural gas nozzle and working method thereof
CN106704067A (en) * 2017-01-25 2017-05-24 中国第汽车股份有限公司 Weak leakage oil return preventing fuel injection device
CN106795839A (en) * 2014-07-19 2017-05-31 莱奥林奇有限责任公司 Double fuel-fuel injector

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015149039A2 (en) * 2014-03-28 2015-10-01 Quantlogic Corporation A fuel injector flexible for single and dual fuel injection
JP2016017514A (en) * 2014-07-11 2016-02-01 株式会社デンソー Fuel injector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0874698A (en) * 1994-09-12 1996-03-19 Mitsubishi Heavy Ind Ltd Binary injection valve of diesel engine
CN103168163A (en) * 2010-08-11 2013-06-19 现代重工业株式会社 Two-stage fuel injection valve
CN103967674A (en) * 2014-04-24 2014-08-06 中国北方发动机研究所(天津) Diesel premixing natural gas nozzle and working method thereof
CN106795839A (en) * 2014-07-19 2017-05-31 莱奥林奇有限责任公司 Double fuel-fuel injector
CN106704067A (en) * 2017-01-25 2017-05-24 中国第汽车股份有限公司 Weak leakage oil return preventing fuel injection device

Also Published As

Publication number Publication date
CN109826738A (en) 2019-05-31

Similar Documents

Publication Publication Date Title
CN109826738B (en) Dual-fuel injector
US4266727A (en) Double-needle injection-valve
US6845746B2 (en) Internal combustion engine with injection of gaseous fuel
CN109209655B (en) Dual-fuel engine combustion system and combustion method
EP3122468B1 (en) A fuel injector flexible for single and dual fuel injection
CN111120166A (en) Integrated direct-injection dual-fuel injector with check valve
WO2013086427A1 (en) A fuel injector for multi-fuel injection with pressure intensification and a variable orifice
RU2748171C2 (en) Internal combustion engine with fuel injection nozzle with additional supply of combustion-supporting medium to the combustion chamber
US11661885B2 (en) Air-assisted jet flame ignition device and ignition method thereof
US11225933B2 (en) Twin outlet check liquid fuel injector for dual fuel system
CN1323239C (en) Fuel injection nozzle
CN110118138A (en) A kind of gaseous-fuel injector
CN114233465A (en) Ammonia fuel combustion system, engine and combustion control method
US20230026883A1 (en) Fuel injector adaptive for single and dual fuel injection
CN209925136U (en) Novel direct injection injector in dual-fuel cylinder
CN216518261U (en) Ammonia fuel combustion system and engine
CN216894617U (en) Combustion system and engine
CN215408942U (en) Stroke adjustable is nozzle structure for dual fuel injector
US8651082B2 (en) Premixed compression ignition diesel engine
CN111577497A (en) Dual-fuel injector
CN220227058U (en) Dual fuel injector
CN205315109U (en) High cetane number fuel sprayer assembly of dual -fuel engine
CN115750071B (en) Gasoline engine combustion system, engine and vehicle
CN210509448U (en) Engine connecting structure of dual-fuel injector
CN215408892U (en) Novel cylinder sleeve for DF dual-fuel host

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant