CN209976626U - Two-stroke homogeneous charge compression ignition engine - Google Patents
Two-stroke homogeneous charge compression ignition engine Download PDFInfo
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- CN209976626U CN209976626U CN201920841981.0U CN201920841981U CN209976626U CN 209976626 U CN209976626 U CN 209976626U CN 201920841981 U CN201920841981 U CN 201920841981U CN 209976626 U CN209976626 U CN 209976626U
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/12—Engines characterised by fuel-air mixture compression with compression ignition
- F02B1/14—Methods of operating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0203—Variable control of intake and exhaust valves
- F02D13/0207—Variable control of intake and exhaust valves changing valve lift or valve lift and timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3017—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
- F02D41/3035—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the premixed charge compression-ignition mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
- F02M31/042—Combustion air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
- F02M31/06—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air
- F02M31/08—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air the gases being exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/125—Fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/13—Combustion air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/14—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating by using heat from working cylinders or cylinder heads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
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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
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
A two-stroke homogeneous compression ignition engine comprises an air compression mechanism, a heating mechanism, a premixing chamber, a fuel oil supply mechanism, a valve phase lift regulation and control air distribution mechanism, a homogeneous compression ignition internal combustion engine, a cooling water heat exchanger and a control signal circuit, wherein the control signal circuit is respectively connected with the air compression mechanism, the heating mechanism, the fuel oil supply mechanism, the valve phase lift regulation and control air distribution mechanism and the homogeneous compression ignition internal combustion engine, an air outlet of the air compression mechanism is communicated with a hot channel and a cold channel, the hot channel is connected with the premixing chamber through the heating mechanism, the cold channel is connected with the premixing chamber, the premixing chamber is connected with a combustion chamber of the homogeneous compression ignition internal combustion engine, and the valve phase lift regulation and control air distribution mechanism controls the amount of gas entering the premixing chamber and the combustion. The utility model discloses can realize that the cold machine of homogeneous charge compression ignition engine starts rapidly and breaks through the limited upper limit of load.
Description
Technical Field
The utility model relates to an internal-combustion engine field, in particular to two stroke homogeneous charge compression ignition engines.
Background
The traditional combustion mode of the ignition gasoline engine or the compression ignition diesel engine belongs to diffusion combustion, the combustion duration is long, the thermal efficiency is low, the flame front temperature is high, and harmful gases such as NOx and the like are easily generated. The Homogeneous Charge Compression Ignition (HCCI) combustion process is a non-diffusion, homogeneous combustion process that occurs simultaneously throughout the combustion chamber, without flame fronts and localized high temperatures, and can substantially eliminate the generation and emission of harmful gases such as NOx. Because the limit of mixed gas ignition and flame propagation is avoided, the air-fuel ratio which tends to be stable under different working conditions is required, so that the maximum fuel gas temperature is reduced, and the generation and the emission of harmful gases such as NOx and the like are avoided.
HCCI combustion is a combustion phenomenon that occurs when the temperature of a gas mixture in a cylinder approaches an autoignition temperature near compression Top Dead Center (TDC), and has the characteristics of a fast combustion speed and a high isochoric degree. However, all HCCI combustion systems suffer from problems such as limited upper load, difficulty in cold start at room temperature, difficulty in controlling combustion time, etc.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome the above-mentioned defect that prior art exists, provide a two-stroke homogeneous charge compression ignition engine.
The technical scheme that the utility model adopts for solving the technical problem is that, a two-stroke homogeneous compression ignition engine, including air compression mechanism, heating mechanism, premixing chamber, fuel supply mechanism, valve phase lift regulation and control valve mechanism, homogeneous compression ignition internal combustion engine, cooling water heat exchanger and control signal circuit, valve phase lift regulation and control valve mechanism includes hot air admission valve, cold air admission valve, variable lift admission valve and variable lift discharge valve, control signal circuit respectively with air compression mechanism, heating mechanism, fuel supply mechanism, hot air admission valve, cold air admission valve, variable lift discharge valve and homogeneous compression ignition internal combustion engine connection, air compression mechanism's gas outlet intercommunication has a hot passageway and a cold passageway, the hot passageway is connected with premixing chamber through heating mechanism, hot air admission valve, the cold channel is connected with a premixing chamber through a cold air intake valve, and the premixing chamber is connected with a combustion chamber of the homogeneous charge compression ignition internal combustion engine through a variable lift intake valve.
Preferably, the fuel supply mechanism comprises a fuel tank, a fuel pipe and an electric control fuel spray nozzle, the fuel tank is connected with one end of the fuel pipe, and the other end of the fuel pipe is connected with the premixing chamber through a cooling water heat exchanger, an electric heater and the electric control fuel spray nozzle.
Preferably, the fuel supply mechanism comprises a fuel tank, a fuel pipe and an electric control fuel injection nozzle, the fuel tank is connected with one end of the fuel pipe, and the other end of the fuel pipe is connected with a combustion chamber of the homogeneous compression ignition internal combustion engine through a cooling water heat exchanger, an electric heating heater and the electric control fuel injection nozzle.
Preferably, the variable lift exhaust valve is connected with an exhaust pipe, the exhaust pipe is connected with an exhaust manifold through an exhaust manifold valve, the exhaust manifold is connected with the premixing chamber, and the exhaust manifold valve is connected with a control signal circuit.
Preferably, the air compression mechanism is a turbocharger or a supercharger.
Preferably, the air compression mechanism is provided with a pressure sensor, and the pressure sensor is connected with the control signal circuit.
Preferably, the heating mechanism comprises an electric heater, a temperature sensor and an external power supply, and the electric heater and the temperature sensor are both connected with the control signal circuit.
Preferably, the variable-lift intake valve and the variable-lift exhaust valve are both provided at the top end of the combustion chamber.
A combustion organizing method of a two-stroke homogeneous charge compression ignition engine,
when the refrigerator is started, an external power supply supplies power to the electric heater, the cylinder body is preheated by heat transfer between the electric heater and the homogeneous compression ignition internal combustion engine, the electric heater preheats compressed air in a hot channel, the control signal circuit controls the lift and the opening duration of a hot air inlet valve, the preheated compressed air enters the premixing chamber, fuel is preheated by the heat transfer between the electric heater and a fuel pipe, the control signal circuit controls the opening duration of an electric control fuel injection nozzle, the preheated fuel is injected into the premixing chamber to be mixed with the preheated compressed air, a piston of the homogeneous compression ignition internal combustion engine runs to a bottom dead center, the control signal circuit controls the lift and the opening duration of a variable lift inlet valve, and the preheated mixed gas of the compressed air and the fuel enters a combustion chamber of the homogeneous compression ignition internal combustion engine, the piston of the homogeneous compression ignition internal combustion engine runs to the top dead center, and the preheated compressed air and the preheated fuel oil are compressed and ignited in the combustion chamber;
when in normal homogeneous compression ignition, a piston of the homogeneous compression ignition internal combustion engine runs towards a lower dead center, high-temperature and high-pressure tail gas in a combustion chamber of the homogeneous compression ignition internal combustion engine is discharged out of the combustion chamber through a variable lift exhaust valve, a control signal circuit controls the lift and the opening duration of the variable lift exhaust valve and controls the allowance of the tail gas in the combustion chamber, the control signal circuit controls the lift and the opening duration of a cold air inlet valve, compressed gas in a cold channel enters a premixing chamber, fuel oil in a fuel oil pipe is preheated by heat transfer with a cooling water heat exchanger and then preheated by heat transfer between the fuel oil pipe and an electric heater, the control signal circuit controls the opening duration of an electric control oil nozzle, the preheated fuel oil is injected into the premixing chamber to be mixed with cold compressed air, and the mixed gas controls the lift and the opening duration of the variable lift inlet valve by the control signal circuit, the mixture is mixed with the rest tail gas in the combustion chamber, a piston of the homogeneous compression ignition internal combustion engine runs to the top dead center, and the mixed gas of the cold compressed air, the preheated fuel oil and the tail gas is compressed and ignited in the combustion chamber;
when in high-load homogeneous compression ignition, a piston of the homogeneous compression ignition internal combustion engine runs towards a lower dead center, high-temperature and high-pressure tail gas in a combustion chamber of the homogeneous compression ignition internal combustion engine is exhausted out of the combustion chamber through a variable lift exhaust valve, a control signal circuit controls the lift and the opening duration of the variable lift exhaust valve and controls the allowance of the tail gas in the combustion chamber, an electric heater stops working, the control signal circuit controls the lift and the opening duration of a cold air inlet valve, compressed gas in a cold channel enters a premixing chamber, fuel oil in a fuel oil pipe and a cooling water heat exchanger conduct heat transfer preheating, the control signal circuit controls the opening duration of an electric control oil nozzle, the preheated fuel oil is injected into the premixing chamber to be mixed with cold compressed air, and mixed gas controls the lift and the opening duration of the variable lift inlet valve through the control signal circuit to enter the combustion chamber and is mixed with the rest tail gas in, the piston of the homogeneous compression ignition internal combustion engine runs to the top dead center, and the mixed gas of cold compressed air, preheated fuel oil and tail gas is compressed and ignited in the combustion chamber.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the electric heater is adopted to preheat the compressed air in the cylinder body and the hot channel of the homogeneous compression ignition internal combustion engine and the fuel in the fuel pipe, the viscosity of the preheated fuel is reduced to obtain better atomization performance, so that the compressed air and the fuel are uniformly mixed in the premixing chamber, and the quick start of a cold machine of the homogeneous compression ignition internal combustion engine can be realized;
2. the exhaust manifold is communicated with the premixing chamber, and the high-temperature and high-pressure tail gas is introduced into the premixing chamber, so that the temperature and the speed of mixing with fresh air can be increased by using the high temperature of the tail gas, and the emission of pollutants can be reduced by using carbon compounds which are not fully combusted in the tail gas;
3. the air compression mechanism is adopted to compress air, the lift and the opening duration of the variable lift air inlet valve are controlled by matching with the control signal circuit, the amount of pressurized air entering the combustion chamber is adjusted, so that the air-fuel ratio in the combustion chamber is adjusted, the lift and the opening duration of the variable lift exhaust valve are controlled by the control signal circuit according to the engine load condition, so that the waste gas allowance in the combustion chamber is controlled, the temperature of the combustion chamber is adjusted by utilizing the waste heat of waste gas, and high-load homogeneous compression ignition can be realized by adjusting the air-fuel ratio and the temperature in the combustion chamber.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a block diagram of an embodiment of the present invention;
fig. 2 is a block diagram of another embodiment of the present invention.
Description of reference numerals: 1 is an air compression mechanism, 1-1 is a hot channel, 1-2 is a cold channel, and 1-3 is a pressure sensor; 2 is a heating mechanism, 2-1 is an electric heater, 2-2 is a temperature sensor, and 2-3 is an external power supply; 3 is a premixing chamber; 4 is a fuel supply mechanism, 4-1 is a fuel tank, 4-2 is a fuel pipe, and 4-3 is an electric control fuel injection nozzle; 5 is a valve phase lift regulating and controlling air distribution mechanism, 5-1 is a hot air inlet valve, 5-2 is a cold air inlet valve, 5-3 is a variable lift inlet valve, 5-4 is a variable lift exhaust valve, 5-4-1 is an exhaust pipe, 5-4-2 is an exhaust manifold valve, and 5-4-3 is an exhaust manifold; 6 is a homogeneous compression ignition internal combustion engine, and 6-1 is a combustion chamber; 7 is a cooling water heat exchanger, and 8 is a control signal circuit.
Detailed Description
The technical solution provided by the embodiments of the present invention is described in detail below with reference to the accompanying drawings.
Example 1
Referring to fig. 1, the present embodiment includes an air compression mechanism 1, a heating mechanism 2, a pre-mixing chamber 3, a fuel supply mechanism 4, a valve phase lift regulating and controlling valve mechanism 5, a homogeneous compression ignition internal combustion engine 6, a cooling water heat exchanger 7 and a control signal circuit 8, the valve phase lift regulating and controlling valve mechanism 5 includes a hot air intake valve 5-1, a cold air intake valve 5-2, a variable lift intake valve 5-3 and a variable lift exhaust valve 5-4, the control signal circuit 8 is respectively connected with the air compression mechanism 1, the heating mechanism 2, the fuel supply mechanism 4, the hot air intake valve 5-1, the cold air intake valve 5-2, the variable lift intake valve 5-3, the variable lift exhaust valve 5-4 and the homogeneous compression ignition internal combustion engine 6, an air outlet of the air compression mechanism 1 is communicated with a hot channel 1-1 and a cold channel 1-2, the hot channel 1-1 is connected with the premixing chamber 3 through the heating mechanism 2 and the hot air inlet valve 5-1, the cold channel 1-2 is connected with the premixing chamber 3 through the cold air inlet valve 5-2, the fuel supply mechanism 4 comprises a fuel tank 4-1, a fuel pipe 4-2 and an electric control fuel injection nozzle 4-3, the fuel tank 4-1 is connected with one end of the fuel pipe 4-2, the other end of the fuel pipe 4-2 is connected with the premixing chamber 3 through the cooling water heat exchanger 7, the electric heating heater 2 and the electric control fuel injection nozzle 4-3, and the premixing chamber 3 is connected with the combustion chamber 6-1 of the homogeneous compression ignition internal combustion engine 6 through the variable lift inlet valve 5-3.
The air compression mechanism 1 is a turbocharger or a supercharger.
The air compression mechanism 1 is provided with pressure sensors 1-3, and the pressure sensors 1-3 are connected with a control signal circuit 8.
The heating mechanism 2 comprises an electric heater 2-1, a temperature sensor 2-2 and an external power supply 2-3, wherein the electric heater 2-1 and the temperature sensor 2-2 are connected with a control signal circuit 8.
The variable-lift intake valve 5-3 and the variable-lift exhaust valve 5-4 are both provided at the top end of the combustion chamber 6-1.
A two-stroke homogeneous charge compression ignition engine,
when the refrigerator is started, the external power supply 2-3 supplies power to the electric heating heater 2-1, the cylinder body is preheated by heat transfer between the electric heating heater 2-1 and the homogeneous compression ignition engine 6, the electric heating heater 2-1 preheats compressed air in the hot channel 1-1, the lift and the opening duration of the hot air intake valve 5-1 are controlled by the control signal circuit 8, the preheated compressed air enters the premixing chamber 3, fuel is preheated by the heat transfer between the electric heating heater 2-1 and the fuel pipe 4-2, the opening duration of the electric control fuel injection nozzle 4-3 is controlled by the control signal circuit 8, the preheated fuel is injected into the premixing chamber 3 to be mixed with the preheated compressed air, the piston of the homogeneous compression ignition engine 6 runs to the bottom dead center, and the lift and the opening duration of the variable lift intake valve 5-3 are controlled by the control signal circuit 8, the preheated mixed gas of the compressed air and the fuel oil enters a combustion chamber 6-1 of the homogeneous compression ignition internal combustion engine 6, a piston of the homogeneous compression ignition internal combustion engine 6 runs to a top dead center, and the preheated compressed air and the preheated fuel oil are compressed and ignited in the combustion chamber 6-1;
when in normal homogeneous compression ignition, a piston of the homogeneous compression ignition internal combustion engine 6 runs towards a lower dead center, high-temperature and high-pressure tail gas in a combustion chamber 6-1 of the homogeneous compression ignition internal combustion engine 6 is exhausted out of the combustion chamber 6-1 through a variable lift exhaust valve 5-4, a control signal circuit 8 controls the lift and the opening duration of the variable lift exhaust valve 5-4 and controls the residual amount of the tail gas in the combustion chamber 6-1, the control signal circuit 8 controls the lift and the opening duration of a cold air inlet valve 5-2, compressed gas in a cold channel 1-2 enters a premixing chamber 3, fuel oil in a fuel oil pipe 4-2 is preheated by heat transfer with a cooling water heat exchanger 7 and then is preheated by heat transfer with an electric heating heater 2-1, the control signal circuit 8 controls the opening duration of an electric control oil nozzle 4-3, the preheated fuel oil is injected into the premixing chamber 3 to be mixed with cold compressed air, the mixed gas enters the combustion chamber 6-1 by controlling the lift and the opening duration of the variable lift air inlet valve 5-3 through the control signal circuit 8 and is mixed with the rest tail gas in the combustion chamber 6-1, the piston of the homogeneous compression ignition internal combustion engine 6 runs to the top dead center, and the mixed gas of cold compressed air, preheated fuel oil and the tail gas is compressed and ignited in the combustion chamber 6-1;
when the high-load homogeneous compression ignition is carried out, a piston of a homogeneous compression ignition internal combustion engine 6 runs towards a lower dead center, high-temperature and high-pressure tail gas in a combustion chamber 6-1 of the homogeneous compression ignition internal combustion engine 6 is exhausted out of the combustion chamber 5-4 through a variable lift exhaust valve, a control signal circuit 8 controls the lift and the opening duration of the variable lift exhaust valve 5-4, the allowance of the tail gas in the combustion chamber 6-1 is controlled, an electric heater 2-1 stops working, a control signal circuit 8 controls the lift and the opening duration of a cold air intake valve 5-2, compressed gas in a cold channel 1-2 enters a premixing chamber 3, fuel oil in a fuel oil pipe 4-2 and a cooling water heat exchanger 7 carry out heat transfer preheating, the opening duration of an electric control fuel injection nozzle 4-3 is controlled by the control signal circuit 8, the preheated fuel oil is injected into the premixing chamber 3 to be mixed with cold, the mixed gas enters the combustion chamber 6-1 through controlling the lift and the opening duration of the variable lift air inlet valve 5-3 by the control signal circuit 8 and is mixed with the rest tail gas in the combustion chamber 6-1, the piston of the homogeneous compression ignition internal combustion engine 6 runs to the top dead center, and the mixed gas of cold compressed air, preheated fuel oil and the tail gas is compressed and ignited in the combustion chamber 6-1.
In order to realize homogeneous compression ignition when the piston runs to the vicinity of the top dead center, under the condition of a certain air-fuel ratio, the control signal circuit 8 controls cold compressed air and fuel oil entering the combustion chamber 6-1 to be correspondingly increased along with the increase of the load of the homogeneous compression ignition internal combustion engine 6, and the surplus of exhaust gas in the combustion chamber 6-1 is correspondingly reduced.
The air compression mechanism 1 compresses air, the electric control oil injection nozzle 4-3 is controlled by matching with the control signal circuit 8 to inject the fuel oil into the premixing chamber 3, the control signal circuit 8 controls the lift and opening duration of the variable lift air inlet valve 5-3 and controls the amount of mixed gas entering the combustion chamber 6-1 so as to adjust the air-fuel ratio in the combustion chamber 6-1, the control signal circuit 8 controls the lift and opening duration of the variable lift exhaust valve 5-4 according to the load condition of the homogeneous compression ignition internal combustion engine 6 so as to control the residual amount of waste gas in the combustion chamber 6-1, the temperature of the mixed gas of the waste gas in the combustion chamber 6-1 and the newly-entered mixed air is adjusted by utilizing the waste heat of the waste gas, and high-load homogeneous compression ignition is realized by adjusting the air-fuel ratio and the temperature in the combustion chamber 6-1.
Example 2
Referring to fig. 2, the present embodiment includes an air compression mechanism 1, a heating mechanism 2, a pre-mixing chamber 3, a fuel supply mechanism 4, a valve phase lift regulating and controlling valve mechanism 5, a homogeneous compression ignition internal combustion engine 6, a cooling water heat exchanger 7 and a control signal circuit 8, the valve phase lift regulating and controlling valve mechanism 5 includes a hot air intake valve 5-1, a cold air intake valve 5-2, a variable lift intake valve 5-3 and a variable lift exhaust valve 5-4, the control signal circuit 8 is respectively connected with the air compression mechanism 1, the heating mechanism 2, the fuel supply mechanism 4, the hot air intake valve 5-1, the cold air intake valve 5-2, the variable lift intake valve 5-3, the variable lift exhaust valve 5-4 and the homogeneous compression ignition internal combustion engine 6, an air outlet of the air compression mechanism 1 is communicated with a hot channel 1-1 and a cold channel 1-2, the hot channel 1-1 is connected with the premixing chamber 3 through the heating mechanism 2 and the hot air inlet valve 5-1, the cold channel 1-2 is connected with the premixing chamber 3 through the cold air inlet valve 5-2, the premixing chamber 3 is connected with the combustion chamber 6-1 of the homogeneous compression ignition internal combustion engine 6 through the variable lift inlet valve 5-3, the fuel supply mechanism 4 comprises a fuel tank 4-1, a fuel pipe 4-2 and an electric control fuel injection nozzle 4-3, the fuel tank 4-1 is connected with one end of the fuel pipe 4-2, and the other end of the fuel pipe 4-2 is connected with the combustion chamber 6-1 of the homogeneous compression ignition internal combustion engine 6 through the cooling water heat exchanger 7, the electric heating heater 2 and the electric control fuel injection nozzle 4-3.
The air compression mechanism 1 is a turbocharger or a supercharger.
The air compression mechanism 1 is provided with pressure sensors 1-3, and the pressure sensors 1-3 are connected with a control signal circuit 8.
The heating mechanism 2 comprises an electric heater 2-1, a temperature sensor 2-2 and an external power supply 2-3, wherein the electric heater 2-1 and the temperature sensor 2-2 are connected with a control signal circuit 8.
The variable-lift intake valve 5-3 and the variable-lift exhaust valve 5-4 are both provided at the top end of the combustion chamber 6-1.
The variable lift exhaust valve 5-4 is connected with the exhaust pipe 5-4-1, the exhaust pipe 5-4-1 is connected with the exhaust manifold 5-4-3 through the exhaust manifold valve 5-4-2, the exhaust manifold 5-4-3 is connected with the premixing chamber 3, and the exhaust manifold valve 5-4-2 is connected with the control signal circuit 8 and is used for introducing high-temperature and high-pressure tail gas into the premixing chamber 3, so that the temperature of the tail gas can be utilized to be mixed with fresh air, carbon compounds which are not fully combusted in the tail gas can be utilized, and the emission of pollutants is reduced.
The above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. A two-stroke homogeneous charge compression ignition engine, characterized by: the device comprises an air compression mechanism (1), a heating mechanism (2), a premixing chamber (3), a fuel supply mechanism (4), a valve phase lift regulation and control air distribution mechanism (5), a homogeneous compression ignition internal combustion engine (6), a cooling water heat exchanger (7) and a control signal circuit (8), wherein the valve phase lift regulation and control air distribution mechanism (5) comprises a hot air inlet valve (5-1), a cold air inlet valve (5-2), a variable lift inlet valve (5-3) and a variable lift exhaust valve (5-4), and the control signal circuit (8) is respectively connected with the air compression mechanism (1), the heating mechanism (2), the fuel supply mechanism (4), the hot air inlet valve (5-1), the cold air inlet valve (5-2), the variable lift inlet valve (5-3), the variable lift exhaust valve (5-4) and the homogeneous compression ignition internal combustion engine (6), the air outlet of the air compression mechanism (1) is communicated with a hot channel (1-1) and a cold channel (1-2), the hot channel (1-1) is connected with the premixing chamber (3) through the heating mechanism (2) and the hot air inlet valve (5-1), the cold channel (1-2) is connected with the premixing chamber (3) through the cold air inlet valve (5-2), and the premixing chamber (3) is connected with a combustion chamber (6-1) of the homogeneous compression ignition internal combustion engine (6) through the variable lift inlet valve (5-3).
2. A two-stroke homogeneous charge compression ignition engine as claimed in claim 1 wherein: the fuel supply mechanism (4) comprises a fuel tank (4-1), a fuel pipe (4-2) and an electric control fuel injection nozzle (4-3), the fuel tank (4-1) is connected with one end of the fuel pipe (4-2), and the other end of the fuel pipe (4-2) is connected with the premixing chamber (3) through a cooling water heat exchanger (7), an electric heating heater (2) and the electric control fuel injection nozzle (4-3).
3. A two-stroke homogeneous charge compression ignition engine as claimed in claim 1 wherein: the fuel supply mechanism (4) comprises a fuel tank (4-1), a fuel pipe (4-2) and an electric control fuel injection nozzle (4-3), the fuel tank (4-1) is connected with one end of the fuel pipe (4-2), and the other end of the fuel pipe (4-2) is connected with a combustion chamber (6-1) of the homogeneous compression ignition internal combustion engine (6) through a cooling water heat exchanger (7), an electric heating heater (2) and the electric control fuel injection nozzle (4-3).
4. A two-stroke homogeneous charge compression ignition engine as claimed in claim 3, wherein: the variable lift exhaust valve (5-4) is connected with an exhaust pipe (5-4-1), the exhaust pipe (5-4-1) is connected with an exhaust manifold (5-4-3) through an exhaust manifold valve (5-4-2), the exhaust manifold (5-4-3) is connected with the premixing chamber (3), and the exhaust manifold valve (5-4-2) is connected with a control signal circuit (8).
5. A two-stroke homogeneous charge compression ignition engine as claimed in claim 1 wherein: the air compression mechanism (1) is a turbocharger or a supercharger.
6. A two-stroke homogeneous charge compression ignition engine as claimed in claim 5, wherein: the air compression mechanism (1) is provided with a pressure sensor (1-3), and the pressure sensor (1-3) is connected with a control signal circuit (8).
7. A two-stroke homogeneous charge compression ignition engine as claimed in claim 1 wherein: the heating mechanism (2) comprises an electric heater (2-1), a temperature sensor (2-2) and an external power supply (2-3), and the electric heater (2-1) and the temperature sensor (2-2) are connected with a control signal circuit (8).
8. A two-stroke homogeneous charge compression ignition engine as claimed in claim 1 wherein: the variable lift intake valve (5-3) and the variable lift exhaust valve (5-4) are both arranged at the top end of the combustion chamber (6-1).
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| JP2005320948A (en) * | 2004-04-08 | 2005-11-17 | Toyota Industries Corp | Premixed compression self-ignition engine and its operating method |
| CN102444507B (en) * | 2010-10-15 | 2013-12-18 | 上海汽车集团股份有限公司 | Gas inlet and outlet system for homogeneous charge compression ignition (HCCI) engine, gas inlet control method and engine |
| CN104005871A (en) * | 2014-05-29 | 2014-08-27 | 天津大学 | Ignition and combustion control method of lean or diluted combustion of engine |
| CN104879251A (en) * | 2015-05-22 | 2015-09-02 | 南京航空航天大学 | Two-stroke homogeneity compression ignition multi-fuel engine and working method thereof |
| CN110219729A (en) * | 2019-05-30 | 2019-09-10 | 张宏杰 | A kind of two-stroke homogeneity compression-ignition engine and burning tissues method |
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