CN104005862B - Control method, system and the vehicle of internal combustion engine - Google Patents
Control method, system and the vehicle of internal combustion engine Download PDFInfo
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- CN104005862B CN104005862B CN201410240346.9A CN201410240346A CN104005862B CN 104005862 B CN104005862 B CN 104005862B CN 201410240346 A CN201410240346 A CN 201410240346A CN 104005862 B CN104005862 B CN 104005862B
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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
Abstract
The present invention proposes a kind of control method of internal combustion engine, and each working cycles of internal combustion engine include：Air inlet, compression, expansion, recompression, reflation and exhaust stroke, this method include：Gasoline is layered the lean burn stage：In air inlet, compression and expansion stroke process, the injected petrol into the cylinder of internal combustion engine, so that internal combustion engine is done work using gasoline, wherein, the air-fuel ratio of gas mixture is between first threshold and Second Threshold；The diesel oil compression ignition stage：The heat of waste gas is in recompression, reflation and exhaust stroke process after gasoline combustion when being layered the lean burn stage using gasoline, to the vapour cylinder injection diesel oil of internal combustion engine, so that internal combustion engine is done work using diesel oil.Method according to embodiments of the present invention can improve the fuel economy of vehicle, and can effectively reduce the discharge capacity of the exhaust pollutant of vehicle.The invention also provides a kind of control system of internal combustion engine and vehicle.
Description
Technical field
The present invention relates to automobile technical field, the more particularly to a kind of control method of internal combustion engine, system and vehicle.
Background technology
Internal combustion engine (such as engine) plays vital effect as the power source of such as automobile, aircraft.Internal combustion engine work
Non-renewable energy resources such as oil can be consumed when making, and produces tail gas pollution, with increasingly warming for global climate, such as CO2's
Emission problem turns into global human focus of attention.Therefore, how to reduce energy consumption and reduce tail gas pollution and be particularly important.
For traditional four-stroke engine, the thermal efficiency is relatively low, such as the exhaust energy for having 30% wastes, and produces
Raw substantial amounts of exhaust pollutant.
The content of the invention
It is contemplated that at least solves one of above-mentioned technical problem.
Therefore, it is an object of the present invention to propose a kind of control method of internal combustion engine.This method can improve vehicle
Fuel economy, and can effectively reduce the discharge capacity of the exhaust pollutant of vehicle.
It is another object of the present invention to propose a kind of control system of internal combustion engine.
Another object of the present invention is to propose a kind of vehicle.
To achieve these goals, the embodiment of the first aspect of the present invention discloses a kind of control method of internal combustion engine,
Each working cycles of the internal combustion engine include：Induction stroke, compression stroke, expansion stroke, recompression stroke, reflation stroke
And exhaust stroke, it the described method comprises the following steps：Gasoline is layered the lean burn stage：In the induction stroke, compression stroke
With expansion stroke process, the injected petrol into the cylinder of the internal combustion engine, so that the internal combustion engine is done using the gasoline
Work(, wherein, for the air-fuel ratio of the gas mixture between first threshold and Second Threshold, the first threshold is small
In the Second Threshold；The diesel oil compression ignition stage：Utilize the heat of waste gas after gasoline combustion during the gasoline layering lean burn stage
Amount recompresses stroke, reflation stroke and exhaust stroke process described, to the vapour cylinder injection diesel oil of the internal combustion engine, so that
The internal combustion engine is done work using the diesel oil.
The control method of internal combustion engine according to embodiments of the present invention, the two of lean burn and diesel oil compression ignition are layered using gasoline
Section combustion mode, the lean burn stage is layered in gasoline, the pumping loss of engine can be reduced, improves the compression ratio of engine
And the specific heat ratio of combustion product, the thermal efficiency is improved, in the diesel oil compression ignition stage, passes through the control to diesel injection number and oil spout phase
System, multiple or single injection event fuel oil can be carried out in expansion stroke and recompression stroke.It is final to keep mixed by two stage combustion
The air-fuel ratio of compound can solve the problem that engine produces too high NOx (nitrogen oxygen when gasoline is layered lean burn near chemically correct fuel
Compound) the problem of, engine does work(twice in a working cycles, improves power density, and improving power density
While, reduce engine idling speed and output Same Efficieney under engine speed, rubbed so as to reduce engine
Wipe, improve fuel economy.
In addition, the control method of internal combustion engine according to the above embodiment of the present invention can also have technology additional as follows special
Sign：
In some instances, it is less than the first preset negative less than the first preset rotation speed and load when the internal combustion engine is in rotating speed
During the operating mode of lotus, secondary injection gasoline mode is used in the gasoline layering lean burn stage, the diesel oil compression ignition stage adopts
Sprayed in advance with diesel oil with main jet pattern, wherein, first time injected petrol phase SOI=(250 °, 350 °) CA BTDC, second sprays
Penetrate gasoline phase EOI=(40 °, 55 °) CA BTDC, the angle of ignition=(25 °, 40 °), first time injected petrol amount：Second of injection
Amount of gasoline=3:2, the λ for closing on spark plug is more than 1；Diesel oil sprays phase EOI in advance1=(2000 °, 250 °) CA ATDC, diesel oil main jet
Phase EOI2=(340 °, 350 °) CA ATDC, diesel oil main jet amount：Pre- discharge rate=2 of diesel oil:1.
In some instances, when the internal combustion engine is in, rotating speed is less than the first preset rotation speed and load is pre- more than described first
If when load and the operating mode less than the second default load, secondary injection gasoline mould is used in the gasoline layering lean burn stage
Formula, the diesel oil compression ignition stage use a diesel injection pattern, wherein, it is default that the described second default load is more than described first
Load, wherein, first time injected petrol phase SOI1=(300 °, 350 °) CA BTDC, second of injected petrol phase SOI2=
(200 °, 150 °) CA BTDC, first time injected petrol amount：Second of injected petrol amount=1：2, close on λ=20 of spark plug；
Diesel injection phase oil spout phase EOI=(320 °, 340 °) CA ATDC.
In some instances, when the internal combustion engine is in, rotating speed is less than the first preset rotation speed and load is pre- more than described second
If during the operating mode of load, carrying out diesel oil compression ignition using multi-injection mode or gasoline being lighted, wherein, when carrying out diesel oil compression ignition,
Main jet oil spout phase SOI be later than or equal to second compression top center before 30 degree, EOI is earlier than or equal to second for main jet oil spout phase
20 degree after second compression top dead centre, when progress gasoline is lighted, λ≤1, and lighted a fire in the recompression stroke, its
In, the described 3rd default load is more than the described second default load.
In some instances, the first threshold is 25, and the Second Threshold is 40.
The embodiment of second aspect of the present invention discloses a kind of control system of internal combustion engine, each work of the internal combustion engine
Circulation includes：Induction stroke, compression stroke, expansion stroke, recompression stroke, reflation stroke and exhaust stroke, the system
Including：Gasoline is layered lean burn control module, in the induction stroke, compression stroke and expansion stroke process, to institute
Injected petrol in the cylinder of internal combustion engine is stated, so that the internal combustion engine is done work using the gasoline, wherein, the gasoline and sky
For the air-fuel ratio of gas mixture between first threshold and Second Threshold, the first threshold is less than the Second Threshold；Diesel oil
Compression ignition control module, for being pressed again described using the heat of waste gas after gasoline combustion during the gasoline layering lean burn stage
Contracting stroke, reflation stroke and exhaust stroke process, to the vapour cylinder injection diesel oil of the internal combustion engine, so that the internal combustion engine is sharp
Done work with the diesel oil.
The control system of internal combustion engine according to embodiments of the present invention, the two of lean burn and diesel oil compression ignition are layered using gasoline
Section combustion mode, the lean burn stage is layered in gasoline, the pumping loss of engine can be reduced, improves the compression ratio of engine
And the specific heat ratio of combustion product, the thermal efficiency is improved, in the diesel oil compression ignition stage, passes through the control to diesel injection number and oil spout phase
System, multiple or single injection event fuel oil can be carried out in expansion stroke and recompression stroke.It is final to keep mixed by two stage combustion
The air-fuel ratio of compound can solve the problem that engine produces asking for too high NOx when gasoline is layered lean burn near chemically correct fuel
Topic, engine do work(twice in a working cycles, improve power density, and while power density is improved, drop
Engine speed under the idling speed and output Same Efficieney of low engine, so as to reduce engine friction, is improved
Fuel economy.
In addition, the control system of internal combustion engine according to the above embodiment of the present invention can also have technology additional as follows special
Sign：
In some instances, it is less than the first preset negative less than the first preset rotation speed and load when the internal combustion engine is in rotating speed
During the operating mode of lotus, the gasoline layering lean burn control module uses secondary injection gasoline mode, the diesel oil compression ignition control
Module is sprayed in advance using diesel oil and main jet pattern, wherein, first time injected petrol phase SOI=(250 °, 350 °) CA BTDC, the
Secondary injection gasoline phase EOI=(40 °, 55 °) CA BTDC, the angle of ignition=(25 °, 40 °), first time injected petrol amount：Second
Secondary injected petrol amount=3:2, the λ for closing on spark plug is more than 1；Diesel oil sprays phase EOI in advance1=(2000 °, 250 °) CA ATDC, bavin
Oily main jet phase EOI2=(340 °, 350 °) CA ATDC, diesel oil main jet amount：Pre- discharge rate=2 of diesel oil:1.
In some instances, when the internal combustion engine is in, rotating speed is less than the first preset rotation speed and load is pre- more than described first
If when load and the operating mode less than the second default load, the gasoline layering lean burn control module uses secondary injection gasoline
Pattern, the diesel oil compression ignition control module use a diesel injection pattern, wherein, the described second default load is more than described the
One default load, wherein, first time injected petrol phase SOI1=(300 °, 350 °) CA BTDC, second of injected petrol phase
SOI2=(200 °, 150 °) CA BTDC, first time injected petrol amount：Second of injected petrol amount=1：2, close on the λ of spark plug
=20；Diesel injection phase oil spout phase EOI=(320 °, 340 °) CA ATDC.
In some instances, when the internal combustion engine is in, rotating speed is less than the first preset rotation speed and load is pre- more than described second
If during the operating mode of load, the diesel oil compression ignition control module carries out diesel oil compression ignition using multi-injection mode or the gasoline is layered
Lean burn control module carries out gasoline using multi-injection mode and lighted, wherein, when carrying out diesel oil compression ignition, main jet oil spout phase
Position SOI be later than or equal to second compression top center before 30 degree, main jet oil spout phase EOI earlier than or equal on the second second compression stop
20 degree after point, when progress gasoline is lighted, λ≤1, and lighted a fire in the recompression stroke, wherein, the described 3rd
Default load is more than the described second default load.
The embodiment of third aspect present invention discloses a kind of vehicle, including：Internal combustion engine；With as described in above-mentioned embodiment
The control system of internal combustion engine.The vehicle can improve fuel economy, and can effectively reduce the discharge capacity of exhaust pollutant.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 be internal combustion engine according to an embodiment of the invention control method in internal combustion engine a working cycles work
Make schematic diagram；
Fig. 2 is the flow chart of the control method of internal combustion engine according to an embodiment of the invention；And
Fig. 3 is the structured flowchart of the control system of internal combustion engine according to an embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint are relative
Importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
The control method, system and vehicle of internal combustion engine according to embodiments of the present invention are described below in conjunction with accompanying drawing.
In the description of the invention, term internal combustion engine refers to dual fuel engine, such as gasoline premixes diesel oil ignited engine,
The internal combustion engine is used as fuel using gasoline and diesel oil.The internal combustion engine is 6-stroke IC engine, as shown in figure 1, being the embodiment of the present invention
In internal combustion engine a working cycles fundamental diagram.As shown in Figure 1, each working cycles of internal combustion engine include following six
Individual stroke, i.e.,：Induction stroke, compression stroke, expansion stroke, recompression stroke, reflation stroke and exhaust stroke.
As shown in Fig. 2 the control method of internal combustion engine according to an embodiment of the invention, including：Gasoline is layered thin combustion
Burn and two stages of diesel oil compression ignition, i.e. each working cycles of internal combustion engine include two stage combustion, first paragraph is that gasoline layering is thin
Burning, second segment is diesel oil compression ignition.
Wherein, the lean burn stage is layered in gasoline, including：In induction stroke, compression stroke and expansion stroke process, to
Injected petrol in the cylinder of internal combustion engine, so that internal combustion engine is done work using gasoline, wherein, the air-fuel of gas mixture
Than between first threshold and Second Threshold, first threshold is less than the Second Threshold.In one embodiment of the invention,
First threshold is but is not limited to 25, and Second Threshold is but is not limited to 40.
Specifically, including：Step S201, i.e. the first stage in gasoline layering lean burn, gasoline and air are mixed
The air-fuel ratio requirement of compound：25 ＜ air-fuel ratios ＜ 40.Using layering lean burn, without pumping loss, (i.e. air throttle can be kept
100% aperture), can be using the piston of high compression ratio, in order to improve the thermal efficiency, using the compression higher than the engine of routine
Than, such as compression ratio is more than 11, using the operation principle of Miller cycle, controls the opening and closing moment of inlet and exhaust valve, increase
Expansion ratio, the product specific heat ratio of gasoline layering lean burn are high, it is possible to increase the thermal efficiency.
Step S202, the i.e. second stage in diesel oil compression ignition, when being layered the lean burn stage using gasoline after gasoline combustion
The heat of waste gas is recompressing stroke, reflation stroke and exhaust stroke process, to the vapour cylinder injection diesel oil of internal combustion engine, so that
Internal combustion engine is done work using diesel oil.
Specifically, the principle of second segment injection diesel oil is as follows, after the completion of the first stage of gasoline layering lean burn
Recompression stroke in, to waste gas (i.e. gasoline be layered the lean burn stage when gasoline combustion after waste gas) be compressed, can produce
The compressed gas of HTHP, compression pressure can reach more than 60bar, if in second stage injected petrol, injection back pressure is very
Greatly, fuel oil spray-cone angle very little, and fuel-injected runs through away from diminishing, and leads to not spray accurate distributive value, first stage
Carrying out gasoline injection pressure can not match with second stage gasoline injection pressure, i.e. the injection pressure and first of second segment injection
The injection pressure of section can not effectively be adjusted in the working cycles that engine is run.And in the case where height sprays back pressure,
Gasoline can not be scattered, and fuel oil can not be mixed uniformly with air, lead to not burn.Therefore, the method for the embodiment of the present invention
Diesel oil compression ignition is used in second stage, the diesel injection mode of high-pressure common rail can be used, by spraying high pressure bavin in second stage
Oil, because diesel injection pressures are high, angle of apray is big, can solve the problem that the injection of second stage gasoline can not scatter, fuel-oil atmozation it is poor
The problem of.And it can effectively solve the problem that fuel combustion of the engine two stages to the demand of injection pressure.
Diesel oil is sprayed in second stage, can accelerate diesel oil molecules and air in cylinder using first stage high-temp waste gas
Mixing, increase burn rate.By making full use of the energy of waste gas caused by the first stage, can solve diesel engine low-temperature starting
It is dynamic slow or can not starting problem.
By using gasoline to be layered lean-burn in the first stage, (i.e. gasoline is layered lean burn rank to the method for the embodiment of the present invention
Section) and in second stage use diesel oil compression ignition so that engine does work twice in a working cycles, drastically increases hair
The power density of motivation, by making full use of the energy of waste gas caused by the first stage, make second stage diesel oil compression ignition can be abundant
Burning, improve the thermal efficiency of engine.
It should be noted that gasoline layering lean burn and second stage progress diesel oil compression ignition are carried out in the first stage,
The air-fuel ratio of final gaseous mixture is asked to be not more than homogeneous charge air-fuel ratio.
Certainly, when engine is in different operating modes, gasoline layering two stage injected petrols of lean burn and diesel oil compression ignition
Had differences with the number etc. of injection diesel oil.
Such as：It is less than when internal combustion engine is in rotating speed less than the first preset rotation speed (middle and slow speed of revolution on ordinary meaning) and load
During the operating mode of the first default load (underload on ordinary meaning), gasoline uses secondary injection vapour in the layering lean burn stage
Oily pattern, the diesel oil compression ignition stage is sprayed in advance using diesel oil and main jet pattern, wherein, first time injected petrol phase SOI=(250 °,
350 °) CA BTDC, second of injected petrol phase EOI=(40 °, 55 °) CA BTDC, the angle of ignition=(25 °, 40 °), for the first time
Injected petrol amount：Second of injected petrol amount=3:2, the λ for closing on spark plug is more than 1, meets that gaseous mixture can be stablized and burns；Bavin
Oily pre- spray phase EOI1=(2000 °, 250 °) CA ATDC, diesel oil main jet phase EOI2=(340 °, 350 °) CA ATDC, diesel oil
Main jet amount：Pre- discharge rate=2 of diesel oil:1, i.e., it is for the first time pre- spray, second is main jet, and requires second of emitted dose：For the first time
Emitted dose=2:1.Injection is mainly cracked using cylinder temperature to diesel oil for the first time, while reduces cylinder temperature, and second
Secondary injection can not exceed defined oil spout phase, otherwise cause to compress negative work increase.
That is, in middle and slow speed of revolution, running on the lower load, the sky of lean burn is layered to first stage gasoline for engine
Combustion requires than existing, specifically, to meet engine in the requirement of middle and slow speed of revolution, underload to fuel economy, it is necessary to：25 ＜
Air-fuel ratio ＜ 40, so, the potentiality of layering lean burn drop oil consumption can be made full use of, after gasoline air mixture ratio ＞ 40, can be made
Engine power output reduces, cyclical variations increase rapidly in cylinder, and fuel oil consumption sharply increases.
In addition, it is more than the first default load and less than second less than the first preset rotation speed and load when internal combustion engine is in rotating speed
During the operating mode of default load (moderate duty on ordinary meaning), gasoline uses secondary injection gasoline in the layering lean burn stage
Pattern, diesel oil compression ignition stage use a diesel injection pattern, wherein, the second default load is more than the first default load, wherein,
First time injected petrol phase SOI1=(300 °, 350 °) CA BTDC, second of injected petrol phase SOI2=(200 °, 150 °)
CA BTDC, first time injected petrol amount：Second of injected petrol amount=1：2, close on λ=20 of spark plug；Diesel injection phase
Oil spout phase EOI=(320 °, 340 °) CA ATDC.To complete to the excessive of high load working condition, simultaneously because fresh charge subtracts
Few, diesel oil only can spray once.
That is, engine is in middle and slow speed of revolution, moderate duty operating mode, it is desirable to λ=20, with carrying for engine load
Height, the detonation tendency of engine is larger, is the excessive offer condition of engine load.
For another example：It is more than the second default load (ordinary meaning less than the first preset rotation speed and load when internal combustion engine is in rotating speed
On big load) operating mode when, diesel oil compression ignition is carried out using multi-injection mode or gasoline is lighted, wherein, when carry out diesel oil pressure
During combustion, main jet oil spout phase SOI be later than or equal to second compression top center before 30 degree, main jet oil spout phase EOI earlier than or wait
20 degree after second of compression top center, when progress gasoline is lighted, λ≤1, and lighted a fire when recompressing stroke,
Wherein, the 3rd default load is more than the described second default load.
That is, within the engine the slow-speed of revolution, high load working condition when, can only carry out diesel oil compression ignition or gasoline and light, just
Can meet the needs of engine is to torque output.Certainly, multi-injection can be carried out.Such as：If carry out diesel oil compression ignition, it is desirable to start
Owner sprays oil spout phase SOI must not be 30 degree before earlier than second compression top center, after EOI must not be later than second of compression top center
20 degree.If carry out gasoline to light, it is desirable to gaseous mixture λ≤1, and can only be lighted a fire near second compression stroke.
In the foregoing description, term specific heat ratio：Internal combustion engine isentropic index, SOI：Fuel injection beginning moment, EOI：End of injection
Moment, BTDC：Before compression top center, ATDC：After compression top center, injection back pressure：Spray the in-cylinder pressure, thin at fuel oil moment
Burning：The air-fuel ratio of the gaseous mixture of fuel and air is more than the burning of chemically correct fuel, pumping loss：Engine is in intake process
In, pressure in air inlet pipe be less than restriction loss caused by atmospheric pressure, through away from：When fuel oil sprays, oil spout oil droplet is away from spray
The distance of mouth.
The control method of internal combustion engine according to embodiments of the present invention, the two of lean burn and diesel oil compression ignition are layered using gasoline
Section combustion mode, the lean burn stage is layered in gasoline, the pumping loss of engine can be reduced, improves the compression ratio of engine
And the specific heat ratio of combustion product, the thermal efficiency is improved, in the diesel oil compression ignition stage, passes through the control to diesel injection number and oil spout phase
System, multiple or single injection event fuel oil can be carried out in expansion stroke and recompression stroke.It is final to keep mixed by two stage combustion
The air-fuel ratio of compound can solve the problem that engine produces asking for too high NOx when gasoline is layered lean burn near chemically correct fuel
Topic, engine do work(twice in a working cycles, improve power density, and while power density is improved, drop
Engine speed under the idling speed and output Same Efficieney of low engine, so as to reduce engine friction, is improved
Fuel economy.
As shown in figure 3, according to the control system 300 of the internal combustion engine of invention one embodiment, including：Gasoline is layered thin combustion
Burn control module 310 and diesel oil compression ignition control module 320.
Wherein, gasoline layering lean burn control module 310 is used in induction stroke, compression stroke and expansion stroke mistake
Journey, the injected petrol into the cylinder of internal combustion engine, so that internal combustion engine is done work using gasoline, wherein, gas mixture
Air-fuel ratio between first threshold and Second Threshold, first threshold is less than Second Threshold.Diesel oil compression ignition control module 320 is used
The heat of waste gas is recompressing stroke, reflation stroke and exhaust after gasoline combustion when using the gasoline layering lean burn stage
Stroke procedure, to the vapour cylinder injection diesel oil of internal combustion engine, so that internal combustion engine is done work using diesel oil.
As a specific example, it is less than first less than the first preset rotation speed and load when internal combustion engine is in rotating speed and presets
During the operating mode of load, gasoline layering lean burn control module 310 uses secondary injection gasoline mode, diesel oil compression ignition control module
320 using diesel oil spray and main jet pattern in advance, wherein, first time injected petrol phase SOI=(250 °, 350 °) CA BTDC, second
Secondary injected petrol phase EOI=(40 °, 55 °) CA BTDC, the angle of ignition=(25 °, 40 °), first time injected petrol amount：Second
Injected petrol amount=3:2, the λ for closing on spark plug is more than 1；Diesel oil sprays phase EOI in advance1=(2000 °, 250 °) CAATDC, diesel oil
Main jet phase EOI2=(340 °, 350 °) CA ATDC, diesel oil main jet amount：Pre- discharge rate=2 of diesel oil:1.
In addition, it is more than the first default load and less than second less than the first preset rotation speed and load when internal combustion engine is in rotating speed
During the operating mode of default load, gasoline layering lean burn control module 310 uses secondary injection gasoline mode, the control of diesel oil compression ignition
Module 320 uses a diesel injection pattern, wherein, the second default load is more than the described first default load, wherein, for the first time
Injected petrol phase SOI1=(300 °, 350 °) CA BTDC, second of injected petrol phase SOI2=(200 °, 150 °) CA
BTDC, first time injected petrol amount：Second of injected petrol amount=1：2, close on λ=20 of spark plug；Diesel injection phase is sprayed
Oil phase position EOI=(320 °, 340 °) CA ATDC.
For another example, when internal combustion engine, which is in rotating speed, is more than the operating mode of the second default load less than the first preset rotation speed and load,
Diesel oil compression ignition control module 320 carries out diesel oil compression ignition or gasoline layering lean burn control module 310 using multi-injection mode
Gasoline is carried out using multi-injection mode to light, wherein, when carrying out diesel oil compression ignition, main jet oil spout phase SOI is later than or is equal to
30 degree before second of compression top center, main jet oil spout phase EOI works as progress earlier than or equal to 20 degree after second of compression top center
When gasoline is lighted, λ≤1, and lighted a fire when recompressing stroke, wherein, the 3rd default load is more than the second default load.
The control system of internal combustion engine according to embodiments of the present invention, the two of lean burn and diesel oil compression ignition are layered using gasoline
Section combustion mode, the lean burn stage is layered in gasoline, the pumping loss of engine can be reduced, improves the compression ratio of engine
And the specific heat ratio of combustion product, the thermal efficiency is improved, in the diesel oil compression ignition stage, passes through the control to diesel injection number and oil spout phase
System, multiple or single injection event fuel oil can be carried out in expansion stroke and recompression stroke.It is final to keep mixed by two stage combustion
The air-fuel ratio of compound can solve the problem that engine produces asking for too high NOx when gasoline is layered lean burn near chemically correct fuel
Topic, engine do work(twice in a working cycles, improve power density, and while power density is improved, drop
Engine speed under the idling speed and output Same Efficieney of low engine, so as to reduce engine friction, is improved
Fuel economy.
It is understood that the specific implementation of the system of the embodiment of the present invention and the specific implementation of method part
Similar, the specific implementation of components of system as directed refers to the description of method part, and in order to reduce redundancy, number does not repeat.
Further embodiment of the present invention provides a kind of vehicle, including：Internal combustion described in internal combustion engine and above-described embodiment
The control system of machine.The vehicle can improve fuel economy, and can effectively reduce the discharge capacity of exhaust pollutant.
In addition, other compositions of vehicle according to embodiments of the present invention and effect are to those skilled in the art all
It is known, in order to reduce redundancy, does not repeat herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is by claim and its equivalent limits.
Claims (4)
1. a kind of control method of internal combustion engine, it is characterised in that each working cycles of the internal combustion engine include：Induction stroke,
Compression stroke, expansion stroke, recompression stroke, reflation stroke and exhaust stroke, the described method comprises the following steps：
Gasoline is layered the lean burn stage：In the induction stroke, compression stroke and expansion stroke process, to the internal combustion engine
Injected petrol in cylinder, so that the internal combustion engine is done work using the gasoline, wherein, the gas mixture
For air-fuel ratio between first threshold and Second Threshold, the first threshold is less than the Second Threshold；
The diesel oil compression ignition stage：The heat of waste gas is pressed again described after gasoline combustion when being layered the lean burn stage using the gasoline
Contracting stroke, reflation stroke and exhaust stroke process, to the vapour cylinder injection diesel oil of the internal combustion engine, so that the internal combustion engine is sharp
Done work with the diesel oil, wherein,
When the internal combustion engine, which is in rotating speed, is less than the operating mode of the first default load less than the first preset rotation speed and load, the vapour
Secondary injection gasoline mode is used in the oil layer lean burn stage, the diesel oil compression ignition stage is sprayed in advance using diesel oil and main jet mould
Formula；It is more than the described first default load and pre- less than second less than the first preset rotation speed and load when the internal combustion engine is in rotating speed
If during the operating mode of load, secondary injection gasoline mode, the diesel oil compression ignition rank are used in the gasoline layering lean burn stage
Diesel injection pattern of Duan Caiyong, wherein, the described second default load is more than the described first default load；When the internal combustion engine
When being less than the first preset rotation speed and load in rotating speed and being more than the operating mode of the described second default load, entered using multi-injection mode
Row diesel oil compression ignition and gasoline are lighted.
2. according to the method for claim 1, it is characterised in that the first threshold is 25, and the Second Threshold is 40.
3. a kind of control system of internal combustion engine, it is characterised in that each working cycles of the internal combustion engine include：Induction stroke,
Compression stroke, expansion stroke, recompression stroke, reflation stroke and exhaust stroke, the system include：
Gasoline is layered lean burn control module, in the induction stroke, compression stroke and expansion stroke process, to described
Injected petrol in the cylinder of internal combustion engine, so that the internal combustion engine is done work using the gasoline, wherein, the gasoline and air
For the air-fuel ratio of mixture between first threshold and Second Threshold, the first threshold is less than the Second Threshold；
Diesel oil compression ignition control module, for being existed using the heat of waste gas after gasoline combustion during the gasoline layering lean burn stage
Recompression stroke, reflation stroke and the exhaust stroke process, to the vapour cylinder injection diesel oil of the internal combustion engine, so that described
Internal combustion engine is done work using the diesel oil, wherein, when the internal combustion engine is in, rotating speed is less than the first preset rotation speed and load is small
When the operating mode of the first default load, secondary injection gasoline mode, the bavin are used in the gasoline layering lean burn stage
The oil pressure combustion stage is sprayed in advance using diesel oil and main jet pattern；When the internal combustion engine is in, rotating speed is less than the first preset rotation speed and load is big
When the described first default load and the operating mode less than the second default load, two are used in the gasoline layering lean burn stage
Secondary injected petrol pattern, the diesel oil compression ignition stage use a diesel injection pattern, wherein, the described second default load is more than
Described first default load；It is more than second preset negative less than the first preset rotation speed and load when the internal combustion engine is in rotating speed
During the operating mode of lotus, diesel oil compression ignition is carried out using multi-injection mode and gasoline is lighted.
A kind of 4. vehicle, it is characterised in that including：
Internal combustion engine；With
The control system of internal combustion engine as claimed in claim 3.
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| CN104533643B (en) * | 2014-12-19 | 2017-02-01 | 河南柴油机重工有限责任公司 | Gas engine lean combustion control method and system |
| CN104612846A (en) * | 2015-01-29 | 2015-05-13 | 长城汽车股份有限公司 | Dual-fuel engine oil injection method and system and automobile with system |
| CN106150737B (en) * | 2015-04-28 | 2019-08-16 | 长城汽车股份有限公司 | A kind of multi-injection oil mass compensation method and device |
| CN106930852B (en) * | 2015-12-29 | 2021-07-20 | 长城汽车股份有限公司 | Control method and system of multi-stroke cycle dual-fuel engine and vehicle |
| WO2017152997A1 (en) * | 2016-03-11 | 2017-09-14 | Volvo Truck Corporation | A method for operating an internal combustion piston engine |
| CN115030831B (en) * | 2021-03-03 | 2023-10-03 | 北汽福田汽车股份有限公司 | Engine control method, computer-readable storage medium, and vehicle |
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| AT5937U1 (en) * | 2001-12-27 | 2003-01-27 | Avl List Gmbh | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE |
| US9127615B2 (en) * | 2008-12-22 | 2015-09-08 | Caterpillar Inc. | Engine control system implementing lean burn 6-stroke cycle |
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