CN109057980A - Engine control system, engine and its control method - Google Patents
Engine control system, engine and its control method Download PDFInfo
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- CN109057980A CN109057980A CN201810862313.6A CN201810862313A CN109057980A CN 109057980 A CN109057980 A CN 109057980A CN 201810862313 A CN201810862313 A CN 201810862313A CN 109057980 A CN109057980 A CN 109057980A
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- fuel injector
- direct injection
- control
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000446 fuel Substances 0.000 claims abstract description 134
- 238000002347 injection Methods 0.000 claims abstract description 131
- 239000007924 injection Substances 0.000 claims abstract description 131
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 25
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 5
- 239000003502 gasoline Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 230000008450 motivation Effects 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000002789 length control Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention discloses a kind of engine control system, engine and its control methods, belong to automotive field.Described device is used to control while be provided with the engine of air flue fuel injector and direct injection device, and described device comprises determining that module, for determining the load of engine；Control module controls the switch of the air flue fuel injector and the direct injection device for the load according to the engine；It when the load of the engine is less than first threshold, controls the air flue fuel injector and opens, control the direct injection device and close；When the load of the engine is less than or equal to second threshold and is greater than or equal to the first threshold, controls the air flue fuel injector and the direct injection device is opened, the second threshold is greater than the first threshold；It when the load of the engine is greater than the second threshold, controls the direct injection device and opens, control the air flue fuel injector and close.Emission request can be met by making automobile not need installation GPF by the device.
Description
Technical field
The present invention relates to automotive field, in particular to a kind of engine control system, engine and its control method.
Background technique
The amounts of particles (Particulate Number, PN) of engine with supercharger discharge is one for evaluating engine with supercharger
Important indicator.
Engine with supercharger includes gas-duct jetting gasoline engine (Port Fuel Injection, PFI) and directly jetting gasoline engine
(Gasoline Direct Injection, GDI).Different spray regimes are very big on PN discharge influence, for example, PFI is low in
When load, PN discharge is low, but in high load capacity, and PN discharge is higher；And GDI is in senior middle school's low-load, PN is discharged all in centre
It is horizontal.Above situation causes existing engine with supercharger to be difficult the requirement for meeting people for low emission.So in the related technology,
It usually requires to install diesel particulate trap (Gasoline Particulate Filter, GPF) additional on engine with supercharger to drop
The discharge of low PN, to meet emission request.And GPF is set and not only causes vehicle complete vehicle cost increase, and due to space factor
Cause GPF difficult arrangement.
Summary of the invention
The embodiment of the invention provides a kind of engine control system, engine and its control methods, without installing GPF additional i.e.
Low PN discharge can be achieved.The technical solution is as follows:
On the one hand, the embodiment of the invention provides a kind of engine control systems, and described device is for controlling while being arranged
There is the engine of air flue fuel injector and direct injection device, described device includes:
Determining module, for determining the load of engine；
Control module, for controlling the air flue fuel injector and the direct injection device according to the load of the engine
Switch；When the load of the engine is less than first threshold, controls the air flue fuel injector and open, control the direct injection
Device is closed；When the load of the engine is less than or equal to second threshold and is greater than or equal to the first threshold, institute is controlled
It states air flue fuel injector and the direct injection device is opened, the second threshold is greater than the first threshold；When the engine
Load when being greater than the second threshold, control the direct injection device and open, control the air flue fuel injector and close.
In an implementation of the embodiment of the present invention, the determining module includes:
Acquisition unit, for acquiring the inlet condition of the engine, the inlet condition includes admission pressure and air inlet
Temperature；
Determination unit, for determining the load of the engine according to the inlet condition.
In an implementation of the embodiment of the present invention, the determination unit, for the air inlet according to the engine
Pressure and intake air temperature calculate air inflow；The load of the engine is determined according to the corresponding relationship of air inflow and load.
In an implementation of the embodiment of the present invention, the control module, for the load and control according to engine
The corresponding relationship of parameter processed determines that control parameter, the control parameter include the air flue fuel injector and the direct injection device
In at least one opening time；Control signal is generated according to the control parameter, the control signal is used to indicate the gas
The opening time of the opening time of road fuel injector and the direct injection device；The control signal is sent to the air flue oil spout
The control terminal of device and the direct injection device.
In an implementation of the embodiment of the present invention, the control module is small for the load when the engine
It when first threshold, controls the air flue fuel injector and opens, control the direct injection device and close；When the load of the engine
When less than or equal to second threshold and being greater than or equal to the first threshold, the air flue fuel injector and the direct injection are controlled
Device is opened, and the second threshold is greater than the first threshold；When the load of the engine is greater than the second threshold, control
It makes the direct injection device to open, controls the air flue fuel injector and close.
On the other hand, the embodiment of the invention also provides a kind of engine, the engine includes combustion chamber, air inlet
Road, exhaust duct, air flue fuel injector, direct injection device and engine control system；
The outlet of the air intake duct and the entrance of the exhaust duct are connect with the combustion chamber, and the air intake duct
Outlet is provided with air intake valve, and the entrance of the exhaust duct is provided with drain tap；
The output end of the air flue fuel injector is connected to the air intake duct, the output end of the direct injection device and the combustion
Burn chamber；
The engine control system is connect with the control terminal of the air flue fuel injector and the direct injection device, the hair
Motivation control device is used to determine the load of the engine；According to the load of the engine control the air flue fuel injector and
The switch of the direct injection device；When the load of the engine is less than first threshold, controls the air flue fuel injector and opens,
The direct injection device is controlled to close；When the load of the engine is less than or equal to second threshold and is greater than or equal to described the
It when one threshold value, controls the air flue fuel injector and the direct injection device is opened, the second threshold is greater than first threshold
Value；It when the load of the engine is greater than the second threshold, controls the direct injection device and opens, control the air flue spray
Oily device is closed.
On the other hand, the embodiment of the invention provides a kind of engine controls, and the method is for controlling such as preceding institute
The engine stated, which comprises
Determine the load of engine；
The switch of the air flue fuel injector and the direct injection device is controlled according to the load of the engine；When the hair
It when the load of motivation is less than first threshold, controls the air flue fuel injector and opens, control the direct injection device and close；When described
The load of engine be less than or equal to second threshold and be greater than or equal to the first threshold when, control the air flue fuel injector and
The direct injection device is opened, and the second threshold is greater than the first threshold；Described in being greater than when the load of the engine
It when second threshold, controls the direct injection device and opens, control the air flue fuel injector and close.
In an implementation of the embodiment of the present invention, the load of the determining engine, comprising:
The inlet condition of the engine is acquired, the inlet condition includes admission pressure and intake air temperature；
The load of the engine is determined according to the inlet condition.
In an implementation of the embodiment of the present invention, described that the negative of the engine is determined according to the inlet condition
It carries, comprising:
Air inflow is calculated according to the admission pressure of the engine and intake air temperature；
The load of the engine is determined according to the corresponding relationship of air inflow and load.
In an implementation of the embodiment of the present invention, described that the air flue spray is controlled according to the load of the engine
The switch of oily device and the direct injection device, comprising:
According to the corresponding relationship of the load of engine and control parameter, determine that control parameter, the control parameter include institute
State the opening time of at least one in air flue fuel injector and the direct injection device；
Control signal is generated according to the control parameter, the control signal is used to indicate the opening of the air flue fuel injector
The opening time of time and the direct injection device；
The control signal is sent to the control terminal of the air flue fuel injector and the direct injection device.
In an implementation of the embodiment of the present invention, described when the load of the engine is less than first threshold
Air flue fuel injector is opened, and the direct injection device is closed；
When the load of the engine is less than or equal to second threshold and is greater than or equal to the first threshold, the gas
Road fuel injector and the direct injection device are opened, and the second threshold is greater than the first threshold；
When the load of the engine is greater than the second threshold, the direct injection device is opened, the air flue oil spout
Device is closed.
Technical solution provided in an embodiment of the present invention has the benefit that
In embodiments of the present invention, air flue fuel injector and direct injection device are provided on engine, due to air flue fuel injector
Different with the PN emission behaviour of direct injection device under different loads, in middle low-load, the PN discharge of air flue fuel injector is low,
When high load capacity, the PN discharge of air flue fuel injector is higher；And in senior middle school's low-load, the PN of direct injection device is discharged all in centre
Level, since in different loads, the PN discharge height of different fuel injectors is different, it is possible to by different loads
Under, it controls different fuel injectors openings or two fuel injectors of control opens simultaneously, can be realized under different loads to realize
Relatively low PN discharge.Emission request can be met by not needing installation GPF, reduce vehicle complete vehicle cost, and avoid sky
Between factor the problem of causing GPF difficult arrangement.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of engine provided in an embodiment of the present invention；
Fig. 2 is the structural block diagram of engine control system provided in an embodiment of the present invention；
Fig. 3 is a kind of load partition schematic diagram provided in an embodiment of the present invention；
Fig. 4 is air flue fuel injector and the respective PN discharge amount schematic diagram of direct injection device；
Fig. 5 is engine PN discharge amount schematic diagram provided in an embodiment of the present invention；
Fig. 6 is a kind of flow chart of engine control provided in an embodiment of the present invention；
Fig. 7 is the flow chart of another engine control provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of structural schematic diagram of engine provided in an embodiment of the present invention.Referring to Fig. 1, the engine includes
Combustion chamber 101, air intake duct 102, exhaust duct 103, air flue fuel injector 104 and direct injection device 105.
Wherein, the entrance of the outlet of air intake duct 102 and exhaust duct 103 is connect with combustion chamber 101, and air intake duct 102
Outlet be provided with air intake valve 120, the entrance of exhaust duct 103 is provided with drain tap 130.
The output end of air flue fuel injector 104 is connected to air intake duct 102, the output end and combustion chamber of direct injection device 105
101 connections.
The embodiment of the present invention describes only the structure of the parts such as engine oil spout, air inlet, is readily apparent that engine further includes
The other structures such as piston.It when the engine is working, will by least one of direct injection device 105 and air flue fuel injector 104
Fuel oil sprays into combustion chamber 101, and air is passed through combustion chamber 101 by air intake duct 102, sprays into the combustion in combustion chamber 101
After mist of oil and air is mixed to form fuel gas, and the energy that fuel gas generates after being ignited drives the piston of engine to do
Function is converted to mechanical energy.
Fig. 2 is the structural block diagram of engine control system provided in an embodiment of the present invention.Referring to fig. 2, which controls
Device 106 is connect with the control terminal of air flue fuel injector 104 and direct injection device 105, and engine control system 106 includes determining mould
Block 161 and control module 162.
Wherein it is determined that module 161 is used to determine the load of engine；Control module 162 is used for the load according to engine
Control the switch of air flue fuel injector 104 and direct injection device 105, and the opening time of air flue fuel injector 104 and direct injection device
105 opening time is corresponding with the load of engine.The load of engine namely the average effective in-cylinder pressure of engine
(BMEP)。
Control module 162 is used for when the load of engine is less than first threshold, and control air flue fuel injector 104 is opened, control
Direct injection device 105 processed is closed；When the load of engine is less than or equal to second threshold and is greater than or equal to first threshold, control
Air flue fuel injector 104 and direct injection device 105 processed are opened, and second threshold is greater than first threshold；When the load of engine is greater than
When second threshold, control direct injection device 105 is opened, and control air flue fuel injector 104 is closed.
In embodiments of the present invention, air flue fuel injector and direct injection device are provided on engine, due to air flue fuel injector
Different with the PN emission behaviour of direct injection device under different loads, in middle low-load, the PN discharge of air flue fuel injector is low,
When high load capacity, the PN discharge of air flue fuel injector is higher；And in senior middle school's low-load, the PN of direct injection device is discharged all in centre
Level, since in different loads, the PN discharge height of different fuel injectors is different, it is possible to by different loads
Under, it controls different fuel injectors openings or two fuel injectors of control opens simultaneously, can be realized under different loads to realize
Relatively low PN discharge.Do not need install additional GPF can meet emission request (6 emission regulation of state), reduce vehicle complete vehicle at
This, and avoid the problem of space factor causes GPF difficult arrangement.In addition, by by the vehicle motor of a geographic area
It is changed to the engine of above structure, can be realized the low emission in entire geographic area.
In embodiments of the present invention, which is engine with supercharger, and the loading range of engine with supercharger is big, using this Shen
The scheme that please be provided can guarantee to realize low emission under various loads.
In embodiments of the present invention, combustion chamber 101 can be pitched roof formula combustion chamber.
Referring to fig. 2, which may include acquisition unit 1611 and determination unit 1612.
Wherein, acquisition unit 1611 is used to acquire the inlet condition of engine, inlet condition may include admission pressure and
Intake air temperature；Determination unit 1612 is used to determine the load of engine according to inlet condition.
In embodiments of the present invention, acquisition unit 1611 may include: pressure sensor and temperature sensor, pressure sensing
Device is used to acquire the admission pressure of engine, and temperature sensor is used to acquire the intake air temperature of engine.
Wherein, the entrance in air intake duct 102 can be set in pressure sensor and temperature sensor, passes through acquisition engine
Admission pressure and intake air temperature determine the load of engine, are easy to implement.
Wherein, pressure sensor and temperature sensor also can integrate as a device, i.e. pressure and temperature sensor.
In embodiments of the present invention, determination unit 1612, for being calculated according to the admission pressure and intake air temperature of engine
Air inflow；The load of engine is determined according to the corresponding relationship of air inflow and load.
In embodiments of the present invention, control module 162, for being closed according to the load of engine and the corresponding of control parameter
System, determines that control parameter, control parameter include the opening time of at least one in air flue fuel injector 104 and direct injection device 105；
Control signal is generated according to control parameter, control signal is used to indicate the opening time and direct injection device of air flue fuel injector 104
105 opening time；Send control signals to the control terminal of air flue fuel injector 104 and direct injection device 105.
In embodiments of the present invention, the inlet condition of engine can be acquired by acquisition unit to determine the negative of engine
It carries, the control signal that control air flue fuel injector 104 and direct injection device 105 work then is generated according to load, signal will be controlled
It is sent to the control terminal of air flue fuel injector 104 and direct injection device 105, to complete under different loads to air flue fuel injector
Low PN discharge is realized in the control of the opening time of 104 opening time and direct injection device 105.
Wherein, the switch that the control terminal of air flue fuel injector 104 controls air flue fuel injector 104 by executing control signal moves
Make.The control terminal of direct injection device 105 controls the switch motion of direct injection device 105 by executing control signal.For example, control
Molding block 162 can control unlatching and the pass of air flue fuel injector 104 and direct injection device 105 by controlling the level height of signal
It closes, and passes through the length control air flue fuel injector 104 for the level high duration for controlling signal and beating for direct injection device 105
ETAD expected time of arrival and departure length.Control module 162 can be to the control terminal of air flue fuel injector 104 and the control terminal difference of direct injection device 105
Transmission controls signal all the way, to control air flue fuel injector 104 and the work of direct injection device 105.
In embodiments of the present invention, air inflow and the corresponding relationship of load can by advance by experiment etc. in a manner of determine, and
It is stored in engine control system.
In embodiments of the present invention, when the load of engine is less than first threshold, different loads respectively corresponds one
Air flue fuel injector opening time, and as load increases, air flue fuel injector opening time gradually increases；When the load of engine is small
In or when being equal to second threshold and being greater than or equal to first threshold, different loads respectively corresponds air flue fuel injector when opening
Between and a direct injection device opening time, and as load increases, air flue fuel injector opening time is gradually shortened, direct injection
Device opening time gradually increases；When the load of engine is greater than second threshold, different loads respectively corresponds a directly spray
Oily device opening time, and as load increases, direct injection device opening time gradually increases.
Wherein, first threshold can be 8bar, and second threshold can be 16bar.When load is less than 8bar, only with gas
Road fuel injector oil spout, the PN discharge of air flue fuel injector is lower at this time, can guarantee the low emission of entire engine；It is being supported on 8
When between~16bar, the PN discharge of air flue fuel injector is gradually increased, and needs to keep away using direct injection device spray a part oil at this time
Exempt from all using maximum discharge caused by air flue fuel injector oil spout, to guarantee the low emission of entire engine；It is greater than in load
When 16bar, only with direct injection device oil spout, the PN discharge of air flue fuel injector is higher at this time, selects the oil spout of direct injection device, energy
Enough guarantee the opposite low emission of entire engine.
Further, control module 162 can be used for controlling direct injection device and carry out oil spout in the way of multi-injection.
Specifically, the opening time of direct injection device is divided into multistage, direct injection device is then controlled according to more by control module 162
Section time interval oil spout, to improve efficiency of combustion.For example, when oil spout total time (opening time of direct injection device) is 3
Between unit, 3 progress oil spouts can be divided into, and one time of interval is sprayed next time again after one chronomere of oil spout every time
Oil.Control module 162 can control direct injection device by the control signal of pulsed when controlling direct injection device
System, to realize multi-injection.
In embodiments of the present invention, the control module 162 in engine control system 106 and determination unit 1612 can adopt
It is realized with electronic control unit (Electronic Control Unit, ECU).
Fig. 3 is that a kind of load (also referred to as average effective in-cylinder pressure BMEP) provided in an embodiment of the present invention divides schematic diagram.
Referring to Fig. 3, when load is 0~8bar (being free of 8bar), adopted using air flue fuel injector oil spout when load is 8~16bar
It is sprayed when load is 16~20bar (being free of 16bar) using direct injection device with air flue fuel injector and direct injection device oil spout
Oil.Wherein 20bar is the upper loading limit of the engine, and 20bar only illustrates here certainly, not as limitation of the present invention.
Abscissa is revolving speed (SPEED, unit r/min) in Fig. 3, and Fig. 3 shows the maximum value loaded under various revolving speeds, such as 1000r/
When min, the maximum value of load is 16bar.
Fig. 4 is air flue fuel injector and the respective PN discharge amount schematic diagram of direct injection device.Referring to fig. 4, in load < 12bar
When, the PN (unit/cm of air flue fuel injector3) discharge is lower, in load >=12bar, the PN of air flue fuel injector discharge is higher.
As shown in figure 4, the PN discharge of air flue fuel injector is sharply increased with the increase of engine load (BMEP), when from BMEP=3bar
104A/cm310 when increasing to BMEP=18bar7A/cm3.And the PN of direct injection device is emitted under various loads more surely
It is fixed, as shown in figure 4, the PN of direct injection device is discharged always 105A/cm3Left and right fluctuation.It is tested on this basis, first really
The total amount of oil spout is needed under fixed each loading condition, then the total amount of oil spout will be needed to be respectively classified into various differences under every kind of load
Proportion distribute to air flue fuel injector and direct injection device and carry out oil spout, then measure the smallest proportion of PN discharge amount, as
Proportion under the load, and match with this opening time of determining air flue fuel injector and direct injection device.
For example, the total amount of oil spout is respectively classified into following proportion: 0:1,0.1:0.9,0.2 when load is 3bar:
Then 0.8 ..., 0.9:0.1,1:0 measure PN discharge amount under various proportions respectively, as a result, it has been found that working as the oil spout of air flue fuel injector
Amount is 1, and when direct injection device distributive value is 0, PN discharge amount is minimum, so air flue fuel injector is only opened when load is 3bar,
Direct injection device is not opened, and the opening time of air flue fuel injector can be determined according to the total amount of oil spout.
Fig. 5 is engine PN discharge amount schematic diagram provided in an embodiment of the present invention.Referring to fig. 4 and Fig. 5, it can be seen that
When low-load (0~8bar), the discharge amount of entire engine uses the discharge amount of single air flue fuel injector identical with Fig. 4, and
It is significantly less than the discharge amount using single direct injection device；At intermediate loads (8~16bar), the discharge amount of entire engine
It is slowly increased as load increases, and lower compared with single air flue fuel injector or direct injection device；At high load (> 16bar)
When, the discharge amount of entire engine uses the discharge amount of single direct injection device identical with Fig. 4, and is significantly less than using single
The discharge amount of air flue fuel injector.To sum up, discharge amount of the entire engine under various loads is compared to using single air flue oil spout
The discharge amount of device or direct injection device, is at reduced levels.
The embodiment of the invention also provides a kind of engine, which includes engine control system as shown in Figure 2.
Fig. 6 is a kind of flow chart of engine control provided in an embodiment of the present invention, and this method is for controlling such as Fig. 1
Shown in engine, referring to Fig. 6, this method comprises:
Step 201: determining the load of engine.
Wherein, the average effective in-cylinder pressure (BMEP) of the load of engine namely engine.
Step 202: the switch of air flue fuel injector and direct injection device, and air flue fuel injector are controlled according to the load of engine
Opening time and the opening time of direct injection device and the load of engine it is corresponding.
When the load of engine is less than first threshold, control air flue fuel injector is opened, and control direct injection device is closed；When
When the load of engine is less than or equal to second threshold and is greater than or equal to first threshold, air flue fuel injector and direct injection are controlled
Device is opened, and second threshold is greater than first threshold；When the load of engine is greater than second threshold, control direct injection device is beaten
It opens, control air flue fuel injector is closed.
The step determines whether air flue fuel injector and direct injection device are opened and respective by the load of engine
Opening time.
In embodiments of the present invention, air flue fuel injector and direct injection device are provided on engine, due to air flue fuel injector
Different with the PN emission behaviour of direct injection device under different loads, in middle low-load, the PN discharge of air flue fuel injector is low,
When high load capacity, the PN discharge of air flue fuel injector is higher；And in senior middle school's low-load, the PN of direct injection device is discharged all in centre
It is horizontal, it is possible to be opened simultaneously, be come by under different loads, controlling different fuel injectors openings or two fuel injectors of control
Relatively low PN discharge can be realized under different loads by realizing.Emission request can be met by not needing installation GPF, be reduced
Vehicle complete vehicle cost, and avoid the problem of space factor causes GPF difficult arrangement.
Fig. 7 is the flow chart of another engine control provided in an embodiment of the present invention, and this method is for controlling such as
Engine shown in FIG. 1, referring to Fig. 7, this method comprises:
Step 301: acquiring the inlet condition of engine, inlet condition includes admission pressure and intake air temperature.
Wherein, the admission pressure of engine and intake air temperature can be carried out by pressure sensor and temperature sensor respectively
Measurement.
Step 302: the load of engine is determined according to inlet condition.
In embodiments of the present invention, step 302 may include: according to the admission pressure and intake air temperature of engine calculate into
Tolerance；The load of engine is determined according to the corresponding relationship of air inflow and load.
Wherein, air inflow and the corresponding relationship of load can by advance by experiment etc. in a manner of determine, and be stored in engine
In control device.
The determination of the load to engine is realized by step 301 and 302.
Step 303: according to the corresponding relationship of the load of engine and control parameter, determining control parameter, control parameter packet
Include the opening time of at least one in air flue fuel injector and direct injection device.
When the load of engine is less than first threshold, control air flue fuel injector is opened, and control direct injection device is closed；When
When the load of engine is less than or equal to second threshold and is greater than or equal to first threshold, air flue fuel injector and direct injection are controlled
Device is opened, and second threshold is greater than first threshold；When the load of engine is greater than second threshold, control direct injection device is beaten
It opens, control air flue fuel injector is closed.
Further, when the load of engine is less than first threshold, different loads respectively corresponds an air flue oil spout
Device opening time；When the load of engine is less than or equal to second threshold and is greater than or equal to first threshold, different loads
Respectively correspond an air flue fuel injector opening time and a direct injection device opening time；When the load of engine is greater than second
When threshold value, different loads respectively corresponds a direct injection device opening time.
Wherein, first threshold can be 8bar, and second threshold can be 16bar.
Step 304: control signal being generated according to control parameter, control signal is used to indicate the opening time of air flue fuel injector
With the opening time of direct injection device.
Step 305: sending control signals to the control terminal of air flue fuel injector and direct injection device.
The switch control to air flue fuel injector and direct injection device is realized by step 303-305.
It should be understood that engine provided by the above embodiment control fuel injector work when, only with above-mentioned each function
The division progress of module can according to need and for example, in practical application by above-mentioned function distribution by different function moulds
Block is completed, i.e., the internal structure of equipment is divided into different functional modules, to complete all or part of function described above
Energy.In addition, engine provided by the above embodiment and engine control embodiment belong to same design, implemented
Journey is detailed in embodiment of the method, and which is not described herein again.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of engine control system, which is characterized in that described device for control and meanwhile be provided with air flue fuel injector and directly
The engine of fuel injector is connect, described device includes:
Determining module, for determining the load of engine；
Control module, for according to the load control air flue fuel injector of the engine and opening for the direct injection device
It closes；When the load of the engine is less than first threshold, controls the air flue fuel injector and open, control the direct injection device
It closes；When the load of the engine is less than or equal to second threshold and is greater than or equal to the first threshold, described in control
Air flue fuel injector and the direct injection device are opened, and the second threshold is greater than the first threshold；When the engine
It when load is greater than the second threshold, controls the direct injection device and opens, control the air flue fuel injector and close.
2. the apparatus according to claim 1, which is characterized in that the determining module includes:
Acquisition unit, for acquiring the inlet condition of the engine, the inlet condition includes admission pressure and intake air temperature；
Determination unit, for determining the load of the engine according to the inlet condition.
3. the apparatus of claim 2, which is characterized in that the determination unit, for according to the engine into
Atmospheric pressure and intake air temperature calculate air inflow；The load of the engine is determined according to the corresponding relationship of air inflow and load.
4. device according to claim 3, which is characterized in that the control module, for according to the load of engine and
The corresponding relationship of control parameter determines that control parameter, the control parameter include the air flue fuel injector and the direct injection
The opening time of at least one in device；Control signal is generated according to the control parameter, the control signal is used to indicate described
The opening time of the opening time of air flue fuel injector and the direct injection device；The control signal is sent to the air flue spray
The control terminal of oily device and the direct injection device.
5. device according to claim 1-4, which is characterized in that the first threshold be 8bar, described second
Threshold value is 16bar.
6. a kind of engine, which is characterized in that the engine include combustion chamber, air intake duct, exhaust duct, air flue fuel injector,
Direct injection device and engine control system；
The outlet of the air intake duct and the entrance of the exhaust duct are connect with the combustion chamber, and the outlet of the air intake duct
It is provided with air intake valve, the entrance of the exhaust duct is provided with drain tap；
The output end of the air flue fuel injector is connected to the air intake duct, the output end and the combustion chamber of the direct injection device
Room connection；
The engine control system is connect with the control terminal of the air flue fuel injector and the direct injection device, the engine
Control device is used to determine the load of the engine；The air flue fuel injector and described is controlled according to the load of the engine
The switch of direct injection device；When the load of the engine is less than first threshold, controls the air flue fuel injector and open, control
The direct injection device is closed；When the load of the engine is less than or equal to second threshold and is greater than or equal to first threshold
It when value, controls the air flue fuel injector and the direct injection device is opened, the second threshold is greater than the first threshold；When
When the load of the engine is greater than the second threshold, controls the direct injection device and open, control the air flue fuel injector
It closes.
7. a kind of engine control, which is characterized in that the method is used to control engine as claimed in claim 6,
The described method includes:
Determine the load of engine；
The switch of the air flue fuel injector and the direct injection device is controlled according to the load of the engine；When the engine
Load when being less than first threshold, control the air flue fuel injector and open, control the direct injection device and close；Start when described
When the load of machine is less than or equal to second threshold and is greater than or equal to the first threshold, the air flue fuel injector and described is controlled
Direct injection device is opened, and the second threshold is greater than the first threshold；When the load of the engine is greater than described second
It when threshold value, controls the direct injection device and opens, control the air flue fuel injector and close.
8. the method according to the description of claim 7 is characterized in that the load of the determining engine, comprising:
The inlet condition of the engine is acquired, the inlet condition includes admission pressure and intake air temperature；
The load of the engine is determined according to the inlet condition.
9. according to the method described in claim 8, it is characterized in that, described determine the engine according to the inlet condition
Load, comprising:
Air inflow is calculated according to the admission pressure of the engine and intake air temperature；
The load of the engine is determined according to the corresponding relationship of air inflow and load.
10. according to the method described in claim 9, it is characterized in that, described control the gas according to the load of the engine
The switch of road fuel injector and the direct injection device, comprising:
According to the corresponding relationship of the load of engine and control parameter, determine that control parameter, the control parameter include the gas
The opening time of at least one in road fuel injector and the direct injection device；
Control signal is generated according to the control parameter, the control signal is used to indicate the opening time of the air flue fuel injector
With the opening time of the direct injection device；
The control signal is sent to the control terminal of the air flue fuel injector and the direct injection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810862313.6A CN109057980A (en) | 2018-08-01 | 2018-08-01 | Engine control system, engine and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810862313.6A CN109057980A (en) | 2018-08-01 | 2018-08-01 | Engine control system, engine and its control method |
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| CN109057980A true CN109057980A (en) | 2018-12-21 |
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| CN201810862313.6A Pending CN109057980A (en) | 2018-08-01 | 2018-08-01 | Engine control system, engine and its control method |
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