CN110195661A - Homogeneity compression-ignition control method and homogeneity compression-ignition engine - Google Patents
Homogeneity compression-ignition control method and homogeneity compression-ignition engine Download PDFInfo
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- CN110195661A CN110195661A CN201910329217.XA CN201910329217A CN110195661A CN 110195661 A CN110195661 A CN 110195661A CN 201910329217 A CN201910329217 A CN 201910329217A CN 110195661 A CN110195661 A CN 110195661A
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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
- F02B69/00—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types
- F02B69/02—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different fuel types, other than engines indifferent to fuel consumed, e.g. convertible from light to heavy fuel
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/081—Adjusting the fuel composition or mixing ratio; Transitioning from one fuel to the other
-
- 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
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
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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
- F02D41/3094—Controlling fuel injection the fuel injection being effected by at least two different injectors, e.g. one in the intake manifold and one in the cylinder
-
- 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
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
-
- 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)
- Oil, Petroleum & Natural Gas (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The present invention provides a kind of homogeneity compression-ignition control method and homogeneity compression-ignition engines, comprising: acquires crankshaft position data, camshaft position data, charge flow rate and the cooling water temperature of engine；Engine speed is calculated according to crankshaft position data and camshaft position data；The tables of data prestored is inquired according to engine speed, charge flow rate and cooling water temperature, obtains the ideal burning parameter of current working；By ideal burning Parameter Switch at engine control amount；Signal is pressed according to the cylinder of cylinder, calculates current Actual combustion parameter；According to Actual combustion parameter and ideal burning parameter, engine control amount is modified.By the time for spraying, injection pulse width and the ratio that optimize intake port injection and direct-injection system, realize the feedback control to combustion phase and burn rate, so that this kind layering lean burn ability that is existing with the comparable minimum discharge of homogeneous charging ignition, and can making engine that there is the work of full load range.
Description
Technical field
The present invention relates to technical field of engines, and in particular, to is based on real-time fuel design and combustion phasing feedback control
The homogeneity compression-ignition control method and homogeneity compression-ignition engine of system.
Background technique
Under the dual-pressure of energy crisis and environmental problem, high efficiency, low emission will become the main of the following internal combustion engine
Research direction.To take into account high thermal efficiency while reaching stringent discharge standard, current most effective method is no more than low
Temperature burning.Homogeneous charge compression ignition hereinafter referred to as homogeneity compression-ignition has always been considered as a kind of typical low temperature combustion mode
It is optimal efficient low-discharging operating mode of internal combustion engine.Homogeneity compression-ignition uses homogeneous mixture, cooperates higher compression ratio, real
The compression ignition for having showed gaseous mixture, since the exothermic reaction of gaseous mixture is in the entire bags while to occur, without fire
Local over-concentration or high temperataure phenomena is also not present in flame communication process, so the thermal efficiency is very high, while nitrogen oxides, soot are arranged
It puts extremely low.
Since the ignition process of the homogeneity compression-ignition chemistry hair that places one's entire reliance upon answers dynamics, temperature, pressure, gaseous mixture are physical and chemical special
Property etc. can all have an impact ignition timing, rate of heat release, thus there is combustion phase, rates to be difficult to control for homogeneity compression-ignition mode
The technical problem of system, Smaller load is easy to catch fire, combustion instability, and big load is then easy to produce pinking, these speciality lead to homogeneous
The operating load range of compression ignition is extremely narrow, limits the practical application of homogeneity compression-ignition, promotes.
In patent CN201010221678.4, describes a kind of composite homogeneity compression-ignitions based on the double injections of air intake duct and start
Machine sprays high cetane number and antiknock gasoline by being respectively arranged nozzle in air intake duct and cylinder respectively, realizes combustion in real time
Expect design function.The invention can greatly widen the condition range of homogeneity compression-ignition, and but there are the following problems: the injection of two kinds of fuel
Ratio needs to demarcate in advance optimal, and staking-out work amount is larger, and can not be adjusted and be sprayed according to actual operating mode Real-time Feedback
Ratio.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of homogeneity compression-ignition control method and homogeneity compression-ignitions
Engine.
A kind of homogeneity compression-ignition control method provided according to the present invention, comprising steps of
S1: crankshaft position data, camshaft position data, charge flow rate and the cooling water temperature of engine are acquired；
S2: engine speed is calculated according to crankshaft position data and camshaft position data；
S3: the tables of data prestored is inquired according to engine speed, charge flow rate and cooling water temperature, obtains current working
Ideal burning parameter；
S4: by ideal burning Parameter Switch at engine control amount；
S5: signal is pressed according to the cylinder of cylinder, calculates current Actual combustion parameter；
S6: according to Actual combustion parameter and ideal burning parameter, engine control amount is modified.
Preferably, the ideal burning parameter and the Actual combustion parameter include: combustion phase and combustion duration.
Preferably, the control amount of the engine includes: that dual fuel injection ratio, dual fuel injection moment, air throttle are opened
Degree and exhaust gas control valve aperture.
Preferably, the engine includes: the first fuel tank, the second fuel tank, in-cylinder direct-jet mechanism, intake port injection machine
Structure and electronic control unit；
First fuel tank connects the cylinder by the in-cylinder direct-jet mechanism, and second fuel tank is logical
Cross the air intake duct that the intake port injection mechanism connects the cylinder；
The electronic control unit connects the in-cylinder direct-jet mechanism and the intake port injection mechanism, and stores the number
According to table.
Preferably, the in-cylinder direct-jet mechanism includes: high pressure fuel pump, direct-jet high pressure fuel rail and direct-injection fuel injector, institute
The both ends for stating direct-jet high pressure fuel rail are separately connected the high pressure fuel pump and the direct-injection fuel injector, the high pressure fuel pump
The other end is connected with first fuel tank, and the direct-injection fuel injector is mounted on cylinder head, the direct-injection fuel injector and institute
The control terminal for stating high pressure fuel pump is connected by conducting wire with the electronic control unit；
The intake port injection mechanism includes: low-pressure fuel pump, intake port injection low-voltage fuel rail and intake port injection spray
Oily device, the both ends of the intake port injection low-voltage fuel rail are separately connected the low-pressure fuel pump and the intake port injection oil spout
Device, the other end of the low-pressure fuel pump are connected with second fuel tank, and the intake port injection fuel injector is mounted on institute
It states in the inlet manifold of cylinder, the inlet valve of cylinder described in face, the intake port injection fuel injector and the low-pressure fuel pump
Control terminal be connected by conducting wire with the electronic control unit.
A kind of homogeneity compression-ignition engine provided according to the present invention, comprising:
Sensor, acquire the crankshaft position data of engine, camshaft position data, charge flow rate, cooling water temperature and
Cylinder presses signal；
Engine speed is calculated according to crankshaft position data and camshaft position data in electronic control unit, according to
Engine speed, charge flow rate and cooling water temperature inquire the tables of data prestored, obtain the ideal burning parameter of current working, will
Ideal burning Parameter Switch presses signal at engine control amount, according to the cylinder of cylinder, calculates current Actual combustion ginseng
Number, according to Actual combustion parameter and ideal burning parameter, is modified engine control amount.
Preferably, the ideal burning parameter and the Actual combustion parameter include: combustion phase and combustion duration.
Preferably, the control amount of the engine includes: that dual fuel injection ratio, dual fuel injection moment, air throttle are opened
Degree and exhaust gas control valve aperture.
Preferably, further include: the first fuel tank, the second fuel tank, in-cylinder direct-jet mechanism, intake port injection mechanism and electronics
Control unit；
First fuel tank connects the cylinder by the in-cylinder direct-jet mechanism, and second fuel tank is logical
Cross the air intake duct that the intake port injection mechanism connects the cylinder；
The electronic control unit connects the in-cylinder direct-jet mechanism and the intake port injection mechanism, and stores the number
According to table.
Preferably, the in-cylinder direct-jet mechanism includes: high pressure fuel pump, direct-jet high pressure fuel rail and direct-injection fuel injector, institute
The both ends for stating direct-jet high pressure fuel rail are separately connected the high pressure fuel pump and the direct-injection fuel injector, the high pressure fuel pump
The other end is connected with first fuel tank, and the direct-injection fuel injector is mounted on cylinder head, the direct-injection fuel injector and institute
The control terminal for stating high pressure fuel pump is connected by conducting wire with the electronic control unit；
The intake port injection mechanism includes: low-pressure fuel pump, intake port injection low-voltage fuel rail and intake port injection spray
Oily device, the both ends of the intake port injection low-voltage fuel rail are separately connected the low-pressure fuel pump and the intake port injection oil spout
Device, the other end of the low-pressure fuel pump are connected with second fuel tank, and the intake port injection fuel injector is mounted on institute
It states in the inlet manifold of cylinder, the inlet valve of cylinder described in face, the intake port injection fuel injector and the low-pressure fuel pump
Control terminal be connected by conducting wire with the electronic control unit.
Compared with prior art, the present invention have it is following the utility model has the advantages that
The configuration of the present invention is simple can be directly transformed based on directly jetting gasoline engine, intake port injection system need to only be added
And it replaces big compression ratio piston and can realize the homogeneity compression-ignition operating mode of efficient low-discharging.
The present invention is based on real-time fuel design thoughts, by adjusting air intake duct, direct fuel injection injection proportion in real time, in conjunction with spray
Moment, injection pressure control are penetrated, the process for preparation of gaseous mixture is controlled in terms of spatio-temporal distribution two, under each operating condition
The gaseous mixture of best fire behaviour can be prepared, to widening the working range of homogeneity compression-ignition to full load.
The present invention introduces the theory of combustion feedback control on the basis of real-time fuel design, presses signal meter by cylinder
Combustion process parameter is calculated, is compared with required combustion parameter, by adjusting double spray injection proportions, time for spraying, jet pressure
Power corrects combustion process.Combustion feedback controls the anti-interference ability for improving whole system, reduces original calibration full load
Huge workload needed for nozzle parameter MAP, so that the homogeneity compression-ignition process of engine is more stable, controllable.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is work flow diagram of the invention；
Fig. 2 is the structural schematic diagram of the embodiment of the present invention.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
As shown in Figure 1, a kind of homogeneity compression-ignition control method provided by the invention, comprising steps of
S1: crankshaft position data, camshaft position data, charge flow rate and the cooling water temperature of engine are acquired；
S2: engine speed is calculated according to crankshaft position data and camshaft position data；
S3: the tables of data prestored is inquired according to engine speed, charge flow rate and cooling water temperature, obtains current working
Ideal burning parameter；
S4: by ideal burning Parameter Switch at engine control amount；
S5: signal is pressed according to the cylinder of cylinder, calculates current Actual combustion parameter；
S6: according to Actual combustion parameter and ideal burning parameter, engine control amount is modified.
Wherein, ideal burning parameter and Actual combustion parameter include: combustion phase and combustion duration.The control of engine
Amount includes: dual fuel injection ratio, dual fuel injection moment, throttle opening and exhaust gas control valve aperture.
As shown in Fig. 2, the present invention also provides a kind of homogeneity compression-ignition engines, comprising:
High-octane rating fuel tank 1, high cetane number fuel tank 9, in-cylinder direct-jet mechanism, intake port injection mechanism, exhaust gas are again
The circulatory system, air throttle 14, electronic control unit 32, intake flow sensor 11, cooling-water temperature sensor, cylinder pressure sensor
28, crankshaft position sensor.
The in-cylinder direct-jet mechanism includes: high pressure fuel pump 8, direct-jet high pressure fuel rail 7 and direct-injection fuel injector 18,
In: 7 both ends of direct-jet high pressure fuel rail are separately connected high pressure fuel pump 8 and direct-injection fuel injector 18,8 other end of high pressure fuel pump and height
Cetane number fuel tank 9 is connected, and direct-injection fuel injector 18 is mounted in cylinder head, and nozzle is located at cylinder head.Direct-injection spray
The control terminal of oily device 18 and high pressure fuel pump 8 is connected by pilot with electronic control unit 32.
The intake port injection mechanism includes: low-pressure fuel pump 2, intake port injection low-voltage fuel rail 3 and air intake duct spray
Penetrate fuel injector 16, in which: 3 both ends of intake port injection low-voltage fuel rail are separately connected low-pressure fuel pump 2 and intake port injection oil spout
Device 16,2 other end of low-pressure fuel pump is connected with high-octane rating fuel tank 1, and intake port injection fuel injector 16 is mounted on cylinder
Inlet manifold on, nozzle face inlet valve.The control terminal of intake port injection fuel injector 16 and low-pressure fuel pump 2 passes through control
Conducting wire is connected with electronic control unit 32.
The gas recirculation system includes EGR control valve 12,12 both ends of EGR control valve difference
Connect air inlet pipe and exhaust pipe.The control terminal of EGR control valve 12 is connected by pilot with electronic control unit 32
It connects.
The acquisition of electronic control unit 32 is passed from intake flow sensor 11, cooling-water temperature sensor, cylinder pressure
Sensor 28, crankshaft position sensor, CMPS Camshaft Position Sensor and throttle position sensor signal, through calculating, driving
High pressure fuel pump 8, direct-injection fuel injector 18, low-pressure fuel pump 2, intake port injection fuel injector 16, EGR control valve 12 and
Throttle motor executes corresponding movement.
It is fired in the high-octane rating fuel tank 1 filled with gasoline or high-octane rating additive gasoline or other high-octane ratings
Oil.Filled with polyoxy methyl dimethoxy ether or high cetane number additive gasoline or other height in the high cetane number fuel tank 9
Cetane fuels.
The compression ratio of homogeneity compression-ignition engine is 13 to 15.
At work, electronic control unit 32 is sensed homogeneity compression-ignition engine by crankshaft position sensor, camshaft location
Device signal, calculates engine speed, obtains charge flow rate by intake flow sensor 11, is obtained by cooling-water temperature sensor
Cooling water temperature is looked by revolving speed, charge flow rate, cooling water temperature and the tables of data being stored in inside electronic control unit 32 is taken to obtain
These parameters are converted to dual fuel injection ratio, spray by the parameters such as required combustion phase, combustion duration under current working
The control amounts such as moment, throttle angle degree, exhaust gas control valve aperture are penetrated, direct-injection fuel injector 18, intake port injection oil spout are driven
Device 16, high pressure fuel pump 8, low-pressure fuel pump 2, EGR control valve 12 and throttle motor execute corresponding movement,
At the same time, electronic control unit 32 presses signal using the cylinder that cylinder pressure sensor 28 acquires, and calculates current combustion phase, combustion
The duration is burnt, compared with the ideal parameters found, to dual fuel injection ratio, time for spraying, throttle angle degree, exhaust gas
The control amounts such as control valve opening are modified, and realize the closed-loop control of bump combustion chamber process.
Engine fuel supply mode is split into two parts of intake port injection system and in-cylinder direct-jet system by the present invention,
Allow to control under the collective effect of two ways to burning.Pass through optimization intake port injection and direct-injection system
The ratio of time for spraying, the injection pulse width of two sets of spraying systems and two sets of spraying system the amount of injection, realize to combustion phase and
The feedback control of burn rate, so that this kind layering lean burn is existing with the comparable minimum discharge of homogeneous charging ignition,
The ability that can make the engine operated under the combustion mode that there is the work of full load range again, while being easy to implement point of fuel
Layer lean burn, improves its economy.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (10)
1. a kind of homogeneity compression-ignition control method, which is characterized in that comprising steps of
S1: crankshaft position data, camshaft position data, charge flow rate and the cooling water temperature of engine are acquired；
S2: engine speed is calculated according to crankshaft position data and camshaft position data；
S3: the tables of data prestored is inquired according to engine speed, charge flow rate and cooling water temperature, obtains the ideal of current working
Combustion parameter；
S4: by ideal burning Parameter Switch at engine control amount；
S5: signal is pressed according to the cylinder of cylinder, calculates current Actual combustion parameter；
S6: according to Actual combustion parameter and ideal burning parameter, engine control amount is modified.
2. homogeneity compression-ignition control method according to claim 1, which is characterized in that the ideal burning parameter and the reality
Border combustion parameter includes: combustion phase and combustion duration.
3. homogeneity compression-ignition control method according to claim 1, which is characterized in that the control amount of the engine includes:
Dual fuel injection ratio, dual fuel injection moment, throttle opening and exhaust gas control valve aperture.
4. homogeneity compression-ignition control method according to claim 1, which is characterized in that the engine includes: the first fuel oil
Case, the second fuel tank, in-cylinder direct-jet mechanism, intake port injection mechanism and electronic control unit；
First fuel tank connects the cylinder by the in-cylinder direct-jet mechanism, and second fuel tank passes through institute
State the air intake duct that intake port injection mechanism connects the cylinder；
The electronic control unit connects the in-cylinder direct-jet mechanism and the intake port injection mechanism, and stores the data
Table.
5. homogeneity compression-ignition control method according to claim 4, which is characterized in that the in-cylinder direct-jet mechanism includes: height
The both ends of compression ignition oil pump, direct-jet high pressure fuel rail and direct-injection fuel injector, the direct-jet high pressure fuel rail are separately connected the high pressure
Fuel pump and the direct-injection fuel injector, the other end of the high pressure fuel pump are connected with first fuel tank, the direct-injection
Fuel injector is mounted on cylinder head, and the control terminal of the direct-injection fuel injector and the high pressure fuel pump passes through conducting wire and the electronics
Control unit is connected；
The intake port injection mechanism includes: low-pressure fuel pump, intake port injection low-voltage fuel rail and intake port injection fuel injector,
The both ends of the intake port injection low-voltage fuel rail are separately connected the low-pressure fuel pump and the intake port injection fuel injector, institute
The other end for stating low-pressure fuel pump is connected with second fuel tank, and the intake port injection fuel injector is mounted on the cylinder
Inlet manifold on, the inlet valve of cylinder described in face, the control of the intake port injection fuel injector and the low-pressure fuel pump
End is connected by conducting wire with the electronic control unit.
6. a kind of homogeneity compression-ignition engine characterized by comprising
Sensor acquires crankshaft position data, camshaft position data, charge flow rate, cooling water temperature and the cylinder pressure of engine
Signal；
Engine speed is calculated according to crankshaft position data and camshaft position data in electronic control unit, according to starting
Machine revolving speed, charge flow rate and cooling water temperature inquire the tables of data prestored, obtain the ideal burning parameter of current working, it would be desirable to
Combustion parameter is converted into engine control amount, presses signal according to the cylinder of cylinder, calculates current Actual combustion parameter, root
Factually border combustion parameter and ideal burning parameter, are modified engine control amount.
7. homogeneity compression-ignition engine according to claim 6, which is characterized in that the ideal burning parameter and the reality
Combustion parameter includes: combustion phase and combustion duration.
8. homogeneity compression-ignition engine according to claim 6, which is characterized in that the control amount of the engine includes: double
Fuel injection, dual fuel injection moment, throttle opening and exhaust gas control valve aperture.
9. homogeneity compression-ignition engine according to claim 6, which is characterized in that further include: the first fuel tank, the second fuel oil
Case, in-cylinder direct-jet mechanism, intake port injection mechanism and electronic control unit；
First fuel tank connects the cylinder by the in-cylinder direct-jet mechanism, and second fuel tank passes through institute
State the air intake duct that intake port injection mechanism connects the cylinder；
The electronic control unit connects the in-cylinder direct-jet mechanism and the intake port injection mechanism, and stores the data
Table.
10. homogeneity compression-ignition engine according to claim 9, which is characterized in that the in-cylinder direct-jet mechanism includes: high pressure
Fuel pump, direct-jet high pressure fuel rail and direct-injection fuel injector, the both ends of the direct-jet high pressure fuel rail are separately connected the high compression ignition
Oil pump and the direct-injection fuel injector, the other end of the high pressure fuel pump are connected with first fuel tank, the direct-injection spray
Oily device is mounted on cylinder head, and the control terminal of the direct-injection fuel injector and the high pressure fuel pump passes through conducting wire and the electronics control
Unit processed is connected；
The intake port injection mechanism includes: low-pressure fuel pump, intake port injection low-voltage fuel rail and intake port injection fuel injector,
The both ends of the intake port injection low-voltage fuel rail are separately connected the low-pressure fuel pump and the intake port injection fuel injector, institute
The other end for stating low-pressure fuel pump is connected with second fuel tank, and the intake port injection fuel injector is mounted on the cylinder
Inlet manifold on, the inlet valve of cylinder described in face, the control of the intake port injection fuel injector and the low-pressure fuel pump
End is connected by conducting wire with the electronic control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910329217.XA CN110195661A (en) | 2019-04-23 | 2019-04-23 | Homogeneity compression-ignition control method and homogeneity compression-ignition engine |
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