CN105422344A - Air inlet fuel injection system, turbo supercharged engine and control method of turbo supercharged engine - Google Patents

Air inlet fuel injection system, turbo supercharged engine and control method of turbo supercharged engine Download PDF

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Publication number
CN105422344A
CN105422344A CN201510851710.XA CN201510851710A CN105422344A CN 105422344 A CN105422344 A CN 105422344A CN 201510851710 A CN201510851710 A CN 201510851710A CN 105422344 A CN105422344 A CN 105422344A
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CN
China
Prior art keywords
oil
intake duct
engine
fuel
oil sprayer
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.)
Pending
Application number
CN201510851710.XA
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Chinese (zh)
Inventor
金智涛
邓大伟
开进彬
郑有能
陈俊
李健
王立新
尹建民
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.)
SAIC General Motors Corp Ltd
Pan Asia Technical Automotive Center Co Ltd
Original Assignee
SAIC General Motors Corp Ltd
Pan Asia Technical Automotive Center 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 SAIC General Motors Corp Ltd, Pan Asia Technical Automotive Center Co Ltd filed Critical SAIC General Motors Corp Ltd
Priority to CN201510851710.XA priority Critical patent/CN105422344A/en
Publication of CN105422344A publication Critical patent/CN105422344A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M39/00Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/30Controlling fuel injection

Abstract

The invention discloses an air inlet fuel injection turbo supercharged engine. The air inlet fuel injection turbo supercharged engine comprises a deflation valve assembly and an air inlet fuel injection system. The deflation valve assembly comprises a deflation valve. The air inlet fuel injection system comprises fuel injectors, air inlets, air inlet valves and an engine cylinder. The fuel injectors are communicated with the air inlets. Fuel is injected into the air inlets through the fuel injectors. The air inlets are communicated with the engine cylinder. The air inlet valves are located between the air inlets and the engine cylinder. Each fuel injector corresponds to one air inlet. The two fuel injectors and the two air inlets correspond to one engine cylinder. The invention further discloses the air inlet fuel injection system and a control method of the turbo supercharged engine. The air inlet fuel injection turbo supercharged engine has the beneficial effects of being high in combustion efficiency and low in cost.

Description

The controlling method of port-Fuel-Injected system, turbosupercharged engine and turbosupercharged engine
Technical field
The present invention relates to automotive engine applications, particularly relate to the controlling method of a kind of port-Fuel-Injected system, turbosupercharged engine and turbosupercharged engine.
Background technique
At present, country to the fuel consume Limited Doses of passenger car and emission request more and more higher; The year two thousand twenty enterprise average fuel consumption target will reach 5.0L/100km.Each main engine factory are all being optimized design for reduction fuel consume and emissions reduction to motor.Exploitation high energy efficiency, the small displacement engine of low oil consumption seems particularly important.
In the supercharged engine of traditional port-Fuel-Injected, corresponding two intake ducts of oil sprayer, a more corresponding engine cylinder.When oil bundle is sprayed into two intake ducts by oil sprayer, due to oil sprayer need with intake duct at an angle, more oil bundle has been sprayed on the tube wall of intake duct, cause intake duct to wet wall phenomenon, reduce the atomizing effect of oil spout, have impact on the effect that oil mixes with air, reduce combustion efficiency.
In-cylinder direct injection supercharged engine, as a kind of developing direction of motor, in the batch application of many main engine factory, this system has changed conventional port-Fuel-Injected mode, directly to firing chamber oil spout, effective raising combustion efficiency, reducing the combustion temperature of supercharged engine, simultaneously by increasing oil pressure, improving the atomizing effect of oil spout, make the fuel particles of atomization less, burning response is rapider.But in-cylinder direct injection oil-fired system is high to oil supply system part requirements, also high to the requirement of engine combustion exploitation, development cost is large.
Therefore, the controlling method designing a kind of combustion efficiency is high, cost is low port-Fuel-Injected system, turbosupercharged engine and turbosupercharged engine is necessary.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, the controlling method of port-Fuel-Injected system, turbosupercharged engine and the turbosupercharged engine that a kind of combustion efficiency is high, cost is low is provided.
The invention provides a kind of port-Fuel-Injected system, comprise oil sprayer, intake duct, suction valve and engine cylinder, described oil sprayer is communicated with described intake duct, oil sprays in described intake duct by described oil sprayer, described intake duct is communicated with described engine cylinder, described suction valve between described intake duct and described engine cylinder, the corresponding described intake duct of each described oil sprayer, two described oil sprayers and two corresponding described engine cylinders of described intake duct.
Further, oil, when described INO, is directly injected in described engine cylinder through described intake duct by described oil sprayer.
The present invention also provides a kind of turbosupercharged engine of port-Fuel-Injected, comprise bleed valve assembly and port-Fuel-Injected system, described bleed valve assembly comprises bleed valve, described port-Fuel-Injected system comprises oil sprayer, intake duct, suction valve and engine cylinder, described oil sprayer is communicated with described intake duct, oil sprays in described intake duct by described oil sprayer, described intake duct is communicated with described engine cylinder, described suction valve is between described intake duct and described engine cylinder, the corresponding described intake duct of each described oil sprayer, two described oil sprayers and two corresponding described engine cylinders of described intake duct.
Further, oil, when described INO, is directly injected in described engine cylinder through described intake duct by described oil sprayer.
Further, when described suction valve and described bleed valve are opened simultaneously, scavenging is carried out to described engine cylinder.
Further, described bleed valve assembly also comprises electric actuator, final controlling element push rod and rocking arm, and described electric actuator controls described final controlling element push rod and drives described rocking arm to rotate, and described rocking arm drives described bleed valve opening and closing.
The present invention also provides a kind of controlling method of turbosupercharged engine, comprises the following steps:
Described INO;
Before described suction valve cuts out, described oil sprayer oil spout;
End of injection, described suction valve cuts out.
Further, further comprising the steps of:
Described bleed valve is opened to a half, described INO;
Before described oil sprayer oil spout, scavenging is carried out to described engine cylinder;
During oil spout, described bleed valve cuts out;
After oil spout, described suction valve cuts out, and described bleed valve is opened simultaneously.
Further, the time difference that described oil sprayer commencement of fuel injection starts to close to described suction valve is crank angle 100 °.
After adopting technique scheme, there is following beneficial effect:
The present invention respectively arranges an oil sprayer due to two intake ducts on each engine cylinder, by improving fuel-oil atmozation ability, improving combustion stability, reducing engine consumption;
Oil is directly injected in engine cylinder through intake duct by oil sprayer, reduce the combustion temperature in supercharged engine cylinder, tendency to detonate reduces, existing compression ratio has the space up carried, thus realizes supercharged engine high compression ratio, reduces engine consumption, and reach the oil spout effect of in-cylinder direct injection supercharged engine, low to part requirements compared to in-cylinder direct injection supercharged engine, also low to the requirement of engine combustion exploitation, development cost is little;
By carrying out scavenging to engine cylinder, the residual gas in engine cylinder being swept to venting side, being all just incoming mixture in next cycle engine cylinder, having improved moment of torsion and export;
The scavenging function of supercharged engine, in conjunction with the larger ouput force of electric actuator, realizes the lifting of low engine speed moment of torsion and booster response, reaches the performance requirement close to in-cylinder direct fuel-injection engine;
By electric actuator, control aperture and the boost pressure of bleed valve more accurately, reduce sub load oil consumption and cold start emission.
Accompanying drawing explanation
Fig. 1 is the structural representation of oil sprayer in one embodiment of the invention;
Fig. 2 is the structural representation of port-Fuel-Injected system in one embodiment of the invention;
Fig. 3 is the sectional view of intake duct and oil sprayer in one embodiment of the invention;
Fig. 4 is the structural representation of bleed valve assembly in one embodiment of the invention;
Fig. 5 is the structural representation of turbosupercharged engine in one embodiment of the invention;
Fig. 6 is the flow chart of the controlling method of turbosupercharged engine in one embodiment of the invention;
Fig. 7 is the flow chart of the controlling method of turbosupercharged engine in most preferred embodiment of the present invention.
The reference character table of comparisons:
10-port-Fuel-Injected system 20-bleed valve assembly
11-oil sprayer 12-intake duct 13-suction valve
14-bleed valve assembly 111-oil bundle 112-stainless steel fuel dispensing tube
The electronic 22-electric actuator of 113-stainless steel clip 21-bleed valve
23-final controlling element push rod 24-rocking arm
Embodiment
The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.
As Figure 1-3, port-Fuel-Injected system 10 in the present invention comprises oil sprayer 11, intake duct 12, suction valve 13 and engine cylinder (not shown), oil sprayer 11 is communicated with intake duct 12, oil sprays in intake duct 12 by oil sprayer 11, intake duct 12 is communicated with engine cylinder, suction valve 13 between intake duct 12 and engine cylinder, a corresponding intake duct 12, two oil sprayers 11 of each oil sprayer 11 and two corresponding engine cylinders of intake duct 12.
Wherein, as shown in Figure 1, the length direction along stainless steel fuel dispensing tube 112 is furnished with row's oil sprayer 11, and oil sprayer 11 is arranged on stainless steel fuel dispensing tube 112 by stainless steel clip 113.Every two oil sprayers 11 are one group, a corresponding engine cylinder.
As shown in Figure 2, the corresponding intake duct 12 of each oil sprayer 11, the oil bundle 111 that oil sprayer 11 sprays enters into respective intake duct 12.
Corresponding two intake ducts of a traditional oil sprayer, a more corresponding engine cylinder.When oil bundle is sprayed into two intake ducts by traditional oil sprayer, due to oil sprayer need with intake duct at an angle, more oil bundle has been sprayed on the tube wall of intake duct, causes intake duct and to wet wall phenomenon, reduce the atomizing effect of oil spout, have impact on the effect that oil mixes with air.Invention increases an oil sprayer 1, make all corresponding intake duct 12 of each oil sprayer 11.The oil bundle 111 of oil sprayer 11 is directly injected in a corresponding intake duct 12, decreases intake duct and to wet wall phenomenon, improve the atomizing effect of oil spout, optimize oil and air mixed effect, improve combustion efficiency.
In the present embodiment, as shown in Figure 3, oil, when suction valve 13 is opened, is directly injected in engine cylinder through intake duct 12 by oil sprayer 11.
Wherein, the front end layout in a certain angle of oil sprayer 11 and intake duct 12, pass into pressurized gas in intake duct 12, oil sprayer 11 is connected with the tail end of intake duct 12, and the bearing of trend of the direction of the oil bundle 111 that oil sprayer 11 sprays into and the tail end of intake duct 12 is basically identical.When suction valve 13 is opened, the oil bundle 111 of ejection is injected in engine cylinder through intake duct 12.A part for oil bundle 111 mixes with air in the tail end of intake duct 12, another part of oil bundle 111 enters in engine cylinder, for reducing the temperature in engine cylinder, the oil bundle 111 entered in engine cylinder also can mix with air in cylinder in cylinder.Its working principle and Incylinder direct injection similar, by directly to firing chamber (i.e. engine cylinder) oil spout, significantly reduce the combustion temperature of supercharged engine, simultaneously by increasing oil pressure, improve the atomizing effect of oil spout, make the fuel particles of atomization less, burning response is rapider.Further, the direction of oil bundle 111 sprayed into due to oil sprayer 11 and the bearing of trend of the tail end of intake duct 12 basically identical, improve accuracy of spray, reduce in course of injection the intake duct produced and to wet wall phenomenon, improve fuel efficiency.The mode of the port-Fuel-Injected in the present invention is low to part requirements compared to in-cylinder direct injection supercharged engine, and also low to the requirement of engine combustion exploitation, development cost is little.
As illustrated in figures 4-5, the present invention also provides a kind of turbosupercharged engine of port-Fuel-Injected, comprise bleed valve assembly 20 and port-Fuel-Injected system 10, bleed valve assembly 20 comprises bleed valve 21, port-Fuel-Injected system 10 comprises oil sprayer 11, intake duct 12, suction valve 13 and engine cylinder, oil sprayer 11 is communicated with intake duct 12, oil sprays in intake duct 12 by oil sprayer 11, intake duct 12 is communicated with engine cylinder, suction valve 13 is between intake duct 12 and engine cylinder, the corresponding intake duct 12 of each oil sprayer 11, two oil sprayers 11 and two corresponding engine cylinders of intake duct 12.Oil, when suction valve 13 is opened, is directly injected in engine cylinder through intake duct 12 by oil sprayer 11.
Wherein, the supercharged engine in inventor is small displacement, 1.5L and following discharge capacity.
In the present embodiment, when suction valve 13 and bleed valve 21 are opened simultaneously, scavenging is carried out to engine cylinder.By carrying out scavenging to engine cylinder, the residual gas in engine cylinder being swept to venting side, being all just incoming mixture in next cycle engine cylinder, having improved moment of torsion and export.
In the present embodiment, as shown in Figure 4, bleed valve assembly 20 also comprises electric actuator 22, final controlling element push rod 23 and rocking arm 24, and electric actuator 22 controls final controlling element push rod 23 and drives rocking arm 24 to rotate, and rocking arm 24 drives bleed valve 21 to close or open.
In the present invention, the scavenging function of supercharged engine is in conjunction with the larger ouput force of electric actuator, realizes the lifting of low engine speed moment of torsion and booster response, reaches the performance requirement close to in-cylinder direct fuel-injection engine; By electric actuator, control aperture and the boost pressure of bleed valve more accurately, reduce sub load oil consumption and cold start emission.
As shown in Figure 6, the present invention also provides a kind of controlling method of turbosupercharged engine, comprises the following steps:
Step S601: INO;
Step S602: before suction valve cuts out, oil sprayer oil spout;
Step S603: end of injection, suction valve cuts out.
After traditional suction valve cuts out, oil sprayer is commencement of fuel injection, and after oil bundle fully mixes with air in intake duct, next time during INO, mixed oil and gas enters in engine cylinder and burns.The present invention, in operating modes such as the large load of motor and full load, by the time advance of oil sprayer 11 oil spout, close the oil spout of advance row soon at suction valve 13, oil bundle 111 directly sprays in engine cylinder, is conducive to reducing the temperature in engine cylinder, tendency to detonate reduces, existing compression ratio has the space up carried, thus realizes supercharged engine high compression ratio, reduces engine consumption.After end of injection, suction valve 13 cuts out again.
As shown in Figure 7, the most preferred embodiment of the controlling method of turbosupercharged engine, comprises the following steps:
Step S701: bleed valve is opened;
Step S702: bleed valve is opened to a half, INO;
Step S703: before oil sprayer oil spout, carries out scavenging to engine cylinder;
Step S704: oil sprayer oil spout;
Step S705: during oil spout, bleed valve cuts out;
Step S706: after oil spout, suction valve cuts out, and bleed valve is opened simultaneously.
Wherein, between engine speed 1000rpm to 2500rpm, in the time period that bleed valve 21 and suction valve 13 are opened simultaneously, by the pressure reduction of air inlet side higher than venting side, residual gas in engine cylinder is swept to venting side, be all just incoming mixture in next cycle engine cylinder, improved moment of torsion and export.After scavenging, oil sprayer 11 carries out oil spout, and oil bundle 111 mixes with the fresh air in engine cylinder, improves combustion efficiency.
When traditional bleed valve is opened, suction valve is cut out; During INO, abandoning valve is close.During due to traditional INO, just commencement of fuel injection, if now bleed valve is opened, the temperature of mixed oil and gas burning at bleed valve place is very high, easily burns out the part of bleed valve.And the present invention, be before oil sprayer 1 oil spout, bleed valve 21 and suction valve 13 are opened simultaneously, and the oil now in intake duct 12 is less, and oil less during scavenging enters in engine cylinder, can not produce higher temperature at bleed valve 21 place.And during oil spout, bleed valve 21 has cut out, also higher temperature can not be produced at bleed valve 21 place.
Preferably, the time difference that oil sprayer 11 commencement of fuel injection starts to close to suction valve 13 is crank angle 100 °.The injection time length of crank angle 100 ° of expression oil sprayers 11.Because motor is under different power requirementss, rotating speed is different, also different according to the injection time length that the corresponding crank angle 100 ° of different rotating speeds calculates.When the power needed for motor is large, the injection time of needs is long; When the power needed for motor is little, the injection time of needs is short.
The present invention has the following advantages:
1, the fuel injection quantity of a single cylinder oil sprayer of routine is assigned on two oil sprayers of single cylinder, reduce the flow of single oil sprayer, reduce the size that oil sprayer sprays oil mist particles, reduce residual fuel oil on intake duct, the amount of fuel be swept out when reducing scavenging, reach and realize scavenging under the condition of the protection catalyst temperature limit, improve part load engine combustion stability simultaneously, reduce oil consumption and discharge;
2, oil is directly injected in engine cylinder through intake duct by oil sprayer, reduce the combustion temperature in supercharged engine cylinder, tendency to detonate reduces, existing compression ratio has the space up carried, thus realizes supercharged engine high compression ratio, reduces engine consumption, and reach the oil spout effect of in-cylinder direct injection supercharged engine, low to part requirements compared to in-cylinder direct injection supercharged engine, also low to the requirement of engine combustion exploitation, development cost is little;
3, by carrying out scavenging to engine cylinder, the residual gas in engine cylinder being swept to venting side, being all just incoming mixture in next cycle engine cylinder, having improved moment of torsion and export;
4, the scavenging function of supercharged engine is in conjunction with the larger ouput force of electric actuator, realizes the lifting of low engine speed moment of torsion and booster response, reaches the performance requirement close to in-cylinder direct fuel-injection engine;
5, by electric actuator, control aperture and the boost pressure of bleed valve more accurately, reduce sub load oil consumption and cold start emission.
Above-described is only principle of the present invention and preferred embodiment.It should be pointed out that for the person of ordinary skill of the art, on the basis of the principle of the invention, other modification some can also be made, also should be considered as protection scope of the present invention.

Claims (9)

1. a port-Fuel-Injected system, comprise oil sprayer, intake duct, suction valve and engine cylinder, described oil sprayer is communicated with described intake duct, oil sprays in described intake duct by described oil sprayer, described intake duct is communicated with described engine cylinder, and described suction valve, between described intake duct and described engine cylinder, is characterized in that, the corresponding described intake duct of each described oil sprayer, two described oil sprayers and two corresponding described engine cylinders of described intake duct.
2. port-Fuel-Injected system according to claim 1, is characterized in that, oil, when described INO, is directly injected in described engine cylinder through described intake duct by described oil sprayer.
3. the turbosupercharged engine of a port-Fuel-Injected, comprise bleed valve assembly and port-Fuel-Injected system, described bleed valve assembly comprises bleed valve, described port-Fuel-Injected system comprises oil sprayer, intake duct, suction valve and engine cylinder, described oil sprayer is communicated with described intake duct, oil sprays in described intake duct by described oil sprayer, described intake duct is communicated with described engine cylinder, described suction valve is between described intake duct and described engine cylinder, it is characterized in that, the corresponding described intake duct of each described oil sprayer, two described oil sprayers and two corresponding described engine cylinders of described intake duct.
4. turbosupercharged engine according to claim 3, is characterized in that, oil, when described INO, is directly injected in described engine cylinder through described intake duct by described oil sprayer.
5. turbosupercharged engine according to claim 4, is characterized in that, when described suction valve and described bleed valve are opened simultaneously, carries out scavenging to described engine cylinder.
6. turbosupercharged engine according to claim 5, it is characterized in that, described bleed valve assembly also comprises electric actuator, final controlling element push rod and rocking arm, and described electric actuator controls described final controlling element push rod and drives described rocking arm to rotate, and described rocking arm drives described bleed valve opening and closing.
7., for a controlling method for the turbosupercharged engine of the turbosupercharged engine of port-Fuel-Injected described in any one of claim 3-6, it is characterized in that, comprise the following steps:
Described INO;
Before described suction valve cuts out, described oil sprayer oil spout;
End of injection, described suction valve cuts out.
8. the controlling method of turbosupercharged engine according to claim 7, is characterized in that, further comprising the steps of:
Described bleed valve is opened to a half, described INO;
Before described oil sprayer oil spout, scavenging is carried out to described engine cylinder;
During oil spout, described bleed valve cuts out;
After oil spout, described suction valve cuts out, and described bleed valve is opened simultaneously.
9. the controlling method of turbosupercharged engine according to claim 7, is characterized in that, the time difference that described oil sprayer commencement of fuel injection starts to close to described suction valve is crank angle 100 °.
CN201510851710.XA 2015-11-27 2015-11-27 Air inlet fuel injection system, turbo supercharged engine and control method of turbo supercharged engine Pending CN105422344A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1253235A (en) * 1998-11-11 2000-05-17 王实 Out-of-cylinder spray type fuel-adjustable gasoline engine
US20050098157A1 (en) * 2003-11-11 2005-05-12 Motoki Ohtani Fuel injection control apparatus and fuel injection control method for internal combustion engine
CN1975135A (en) * 2005-11-30 2007-06-06 福特环球技术公司 Engine with two port fuel injectors
US20140026860A1 (en) * 2012-07-24 2014-01-30 Hitachi Automotive Systems, Ltd. Apparatus and Method for Controlling Internal-Combustion Engine
CN204344295U (en) * 2014-11-27 2015-05-20 上海通用汽车有限公司 Port fuel injection system, motor and automobile
CN204402641U (en) * 2014-11-26 2015-06-17 上海通用汽车有限公司 Automobile-used turbosupercharged engine assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1253235A (en) * 1998-11-11 2000-05-17 王实 Out-of-cylinder spray type fuel-adjustable gasoline engine
US20050098157A1 (en) * 2003-11-11 2005-05-12 Motoki Ohtani Fuel injection control apparatus and fuel injection control method for internal combustion engine
CN1975135A (en) * 2005-11-30 2007-06-06 福特环球技术公司 Engine with two port fuel injectors
US20140026860A1 (en) * 2012-07-24 2014-01-30 Hitachi Automotive Systems, Ltd. Apparatus and Method for Controlling Internal-Combustion Engine
CN204402641U (en) * 2014-11-26 2015-06-17 上海通用汽车有限公司 Automobile-used turbosupercharged engine assembly
CN204344295U (en) * 2014-11-27 2015-05-20 上海通用汽车有限公司 Port fuel injection system, motor and automobile

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Application publication date: 20160323