CN101985906B - Fuel injection mechanism for natural gas single-fuel engine - Google Patents
Fuel injection mechanism for natural gas single-fuel engine Download PDFInfo
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- CN101985906B CN101985906B CN2010105238412A CN201010523841A CN101985906B CN 101985906 B CN101985906 B CN 101985906B CN 2010105238412 A CN2010105238412 A CN 2010105238412A CN 201010523841 A CN201010523841 A CN 201010523841A CN 101985906 B CN101985906 B CN 101985906B
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- gas nozzle
- gas
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- nozzle
- valve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The invention provides a fuel injection mechanism for a natural gas single-fuel engine, comprising an engine intake manifold body and a gas nozzle. The mechanism is characterized in that the position of an intake gate close to a mounting base of the engine intake manifold is provided with a gas nozzle which is contributive to sufficient mixing of mixed gas; the gas nozzle comprises a gas nozzle shell, wherein a needle valve with a valve seat is arranged at the front end of the gas nozzle shell; a spring is arranged at the rear end of the needle valve; and the gas nozzle shell corresponding to the spring is provided with an armature and an electromagnetic coil. An electric control unit of the gas nozzle controls the oil injection parameter by monitoring signals of various sensors of the engine and driver operation commands through singlechip operation, and ensures that the vehicle has good exhaust and gas consumption while excellent start and driving performance are provided. The gas nozzle is arranged at the position of the injection nozzle of a gasoline engine, and is closer to an intake gate of the engine to ensure that the injection efficiency is remarkably improved, sufficient mixing of the mixed gas is facilitated, and the combustion efficiency is improved.
Description
Technical field
The invention belongs to the gas as single fuel technical field of engines, specifically a kind of fuel injection mechanism of gas as single fuel motor.
Background technique
Serious year by year along with the exhausted day by day and environmental pollution problem of the energy, countries in the world are more and more paid attention to the energy-conserving and environment-protective problem.Automotive industry in more than 100 year of its development, though energy-conservation, pollute, discharging and have all obtained significant improvement and significant progress aspect some other, the pollutant that its tail gas is discharged is still the primary pollution source of current earth atmosphere.Automobile industry has consumed a big chunk of world oil output; Countries in the world are also more and more paid attention to the PHEV Study on Technology under this overall background; Each big auto vendor drops into the exploitation that substantial contribution carries out various alternative fuel cars one after another, and the car that acts as a fuel with rock gas arises at the historic moment.Rock gas becomes the whole world and increases one of the swiftest and the most violent energy industry with the rapid growth in every year about 12%, will become the popular energy commodity of oil next afterwards whole world contention.For guaranteeing the energy supply diversification and improve energy consumption structure, country more and more payes attention to the exploitation of rock gas car, and natural gas engine receives especially and paying close attention to widely and attention highly as the core technology of rock gas car.
Summary of the invention
The objective of the invention is on traditional single-fuel engine basis, to provide a kind of fuel injection mechanism of gas as single fuel motor.
The objective of the invention is to realize like this: it includes the engine intake manifold body; Gas nozzle; The intake manifold mounting hole is characterized in that: be provided with near the intake valve position of engine intake manifold fitting seat and help the well-mixed gas nozzle of mixed gas; Described gas nozzle includes a gas nozzle shell, the front end of gas nozzle shell be provided with one have a valve seat needle-valve, be provided with spring in the needle-valve rear end, the gas nozzle shell corresponding with spring is provided with armature and electromagnetic coil.
Described gas nozzle is installed on the position of petrol engine oil nozzle.
Be in series with a low-side switch and high-side switch respectively at the two ends of electromagnetic coil as stated.
With respect to the fuel injection mode of the right gas single-fuel engine of routine, this present invention has the following advantages:
1, nozzle has very high speed of response, opens total reponse time and is merely 0.8ms.The demand that is fit to very much the control of high speed engine and highi degree of accuracy gas quantity.The ECU of nozzle is through the signal of the various sensors of monitoring motor; And from the driver's operation instruction of efp position transducer output; After the computing of control core single-chip microcomputer, the oil spout key parameter is controlled, when guaranteeing better discharging of vehicle and gas consumption, good starting and cornering ability is provided.
2, this structure is different with its traditional natural gas motor, has cancelled the rock gas inlet hole of motor, adopts the special-purpose blast nozzle of rock gas; The position of installing is not also on intake manifold but the position of petrol engine oil nozzle.
3. the blast nozzle mounting point makes jet efficient obviously improve more near engine intake valve, helps the abundant mixing of mixed gas, improves combustion efficiency.
Description of drawings
Fig. 1 is a three-dimensional deployed configuration simplified schematic diagram of the present invention;
Fig. 2 is a gas spraying gas nozzle structure simplified schematic diagram of the present invention;
Fig. 3 is a rock gas nozzle mode of operation theory diagram of the present invention;
Fig. 4 is a rock gas nozzle electronic pulse width signal driving mode principle sketch of the present invention.
To do further explain to the present invention through instance below, but following instance only is the present invention's example wherein, the rights protection scope of not representing the present invention and being limited, rights protection scope of the present invention is as the criterion with claims.
Embodiment
Instance 1
Shown in Fig. 1-2,4 among the figure is engine intake manifold, on the position near intake valve, is provided with gas nozzle fitting seat 2, is provided with near the intake valve position of engine intake manifold fitting seat 2 and helps the well-mixed gas nozzle 1 of mixed gas; Described gas nozzle 1 includes a gas nozzle shell 109; The front end of gas nozzle shell 109 be provided with one have a valve seat 103 needle-valve 102; Be provided with return spring 101 in needle-valve 102 rear ends, embedding on the embedding gas nozzle shell 109 corresponding with return spring 101 has armature 107 and electromagnetic coil 108.Not, 104 among the figure is the needle-valve spray orifice, and 105 is the sheath of valve seat, and 106 is the block of needle-valve 102 spacing needle-valves 102 and return spring 101.Among Fig. 13 is the intake manifold mounting hole.The blast nozzle mounting point of this structure promptly in conventional gasoline engin oil nozzle position, more near engine intake valve, makes jet efficient obviously improve like Fig. 1, shown in 2, helps the abundant mixing of mixed gas, improves combustion efficiency.
The mode of operation of rock gas nozzle is as shown in Figure 3, and this is the control system of a closed loop.The working state and the driver command of sensor acquisition motor send feedback signal; ECU receives the feedback signal of sensor, according to the control logic of motor itself, sends instruction, and promptly electrical pulse drives (PWM) signal; Electromagnetic coil 108 receives and produces electromagnetic force after electrical pulses drive (PWM) signals, electromagnetic force control armature 107 and make needle-valve 102 overcome spring 101 elastic force to move, thus open the hole of 103 of needle-valve 102 and valve seats, the rock gas ejection; According to the variation of pwm signal, the opening and closing moment that the control gas nozzle is different, thus obtain different fuel injection times and emitted dose; Whole process provides power supply by the power module unit.
As shown in Figure 4: the rock gas nozzle adopts electrical pulse (PWM) drive signal mode, and the high-order pulsewidth of pwm pulse has directly reflected the emitted dose of rock gas, and effective pulsewidth of natural gas injection is considered the lag time that solenoid valve opens, cuts out.Nozzle drives the driving mode that adopts high-order and low-side switch, and what nozzle was opened keeps electric current by the decision of low-side switch endurance, and high-side switch control nozzle is opened the greatest measure of electric current, and the nozzle driving current is 4A, is 1A and keep electric current.Nozzle drive circuit and waveform are as shown in the figure, and this kind driving mode can reduce the power consumption of gas nozzle to greatest extent, increase the life-span and the reliability of nozzle.
Claims (2)
1. the fuel injection mechanism of a gas as single fuel motor; It includes the engine intake manifold body; Gas nozzle; The intake manifold mounting hole is characterized in that: be provided with near the intake valve position of engine intake manifold fitting seat and help the well-mixed gas nozzle of mixed gas, this gas nozzle is installed on the position of petrol engine oil nozzle; Described gas nozzle includes a gas nozzle shell, the front end of gas nozzle shell be provided with one have a valve seat needle-valve, be provided with spring in the needle-valve rear end, the gas nozzle shell corresponding with spring is provided with armature and electromagnetic coil.
2. the fuel injection mechanism of gas as single fuel motor according to claim 1 is characterized in that: the two ends at said electromagnetic coil are in series with a low-side switch and high-side switch respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105238412A CN101985906B (en) | 2010-10-29 | 2010-10-29 | Fuel injection mechanism for natural gas single-fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105238412A CN101985906B (en) | 2010-10-29 | 2010-10-29 | Fuel injection mechanism for natural gas single-fuel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101985906A CN101985906A (en) | 2011-03-16 |
| CN101985906B true CN101985906B (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105238412A Expired - Fee Related CN101985906B (en) | 2010-10-29 | 2010-10-29 | Fuel injection mechanism for natural gas single-fuel engine |
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| CN (1) | CN101985906B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456858B (en) * | 2020-02-18 | 2022-03-18 | 哈尔滨工程大学 | Natural gas engine fuel gas injection method based on' previous cycle effect |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545418A (en) * | 2009-05-07 | 2009-09-30 | 哈尔滨工程大学 | Gas jet device of electric control jet lean-burn natural gas engine and jet control method |
| CN201351550Y (en) * | 2008-12-25 | 2009-11-25 | 浙江吉利汽车研究院有限公司 | Air intake branch pipe on engine |
| CN201363211Y (en) * | 2008-12-08 | 2009-12-16 | 上海华普汽车有限公司 | Dual fuel air intake manifold |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4634765B2 (en) * | 2004-09-16 | 2011-02-16 | 日産自動車株式会社 | Fuel injection valve mounting structure |
| CN1728497A (en) * | 2005-07-20 | 2006-02-01 | 镇江江奎科技有限公司 | Drive circuit of high and low level switch combination with voltage boost circuit |
| CN101413422A (en) * | 2008-11-28 | 2009-04-22 | 江苏大学 | Direct spraying natural gas two-air valve engine underpressure layered combustion chamber structure in cylinder |
| CN101749136A (en) * | 2008-12-19 | 2010-06-23 | 天津内燃机研究所 | Direct injection engine in electric control gas cylinder |
| CN201826977U (en) * | 2010-10-29 | 2011-05-11 | 华晨汽车集团控股有限公司 | Fuel injection mechanism of single-fuel natural gas engine |
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2010
- 2010-10-29 CN CN2010105238412A patent/CN101985906B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201363211Y (en) * | 2008-12-08 | 2009-12-16 | 上海华普汽车有限公司 | Dual fuel air intake manifold |
| CN201351550Y (en) * | 2008-12-25 | 2009-11-25 | 浙江吉利汽车研究院有限公司 | Air intake branch pipe on engine |
| CN101545418A (en) * | 2009-05-07 | 2009-09-30 | 哈尔滨工程大学 | Gas jet device of electric control jet lean-burn natural gas engine and jet control method |
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| CN101985906A (en) | 2011-03-16 |
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Granted publication date: 20120704 Termination date: 20211029 |