CN106812615A - The control method of engine, system and vehicle - Google Patents
The control method of engine, system and vehicle Download PDFInfo
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- CN106812615A CN106812615A CN201510859172.9A CN201510859172A CN106812615A CN 106812615 A CN106812615 A CN 106812615A CN 201510859172 A CN201510859172 A CN 201510859172A CN 106812615 A CN106812615 A CN 106812615A
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- egr
- engine
- pressure
- gas storage
- storage tanks
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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
- F02D41/0025—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]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0052—Feedback control of engine parameters, e.g. for control of air/fuel ratio or intake air amount
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
-
- 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]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
-
- 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]
- F02D41/0065—Specific aspects of external EGR control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
- F02D2021/083—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine controlling exhaust gas recirculation electronically
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention provides a kind of control method of engine, system and vehicle, the method is comprised the following steps：Concentration according to oxygen in engine exhaust judges whether excess air coefficient is located in preset range；If excess air coefficient is not in preset range, determine whether whether the pressure of the EGR gases in EGR gas storage tanks is more than the first predetermined pressure；If the pressure of the EGR gases in EGR gas storage tanks is more than predetermined load more than the load of the first predetermined pressure and engine, carry out filling into EGR gases to the cylinder of engine；If the pressure of the EGR gases in EGR gas storage tanks is not more than predetermined electricity more than the dump energy of the first predetermined pressure and battery, to being filled with EGR gases in EGR gas storage tanks.The method of the present invention can effectively reduce or even avoid the generation of pinking and avoid excessive discharge temperature, and effectively reduce the discharge of the energy consumption and exhaust pollutant of engine.
Description
Technical field
The present invention relates to automobile technical field, more particularly to a kind of control method of engine, system and vehicle.
Background technology
As adding for oil consumption standard is tight, the oil consumption of gasoline engine and discharge pressure are increasing.Gasoline engine work in correlation technique is deposited
In following shortcoming：
When gasoline engine is when compared with large load operation, such as gasoline engine is susceptible to pinking under middle rotating speed high load working condition high, or even
The strong pinking of generation, delivery temperature are higher therewith, cause oil consumption higher, and discharge is severe, such as exist largely not in tail gas
The dusty gas such as the hydrocarbon HC and carbon monoxide CO of burning.
In correlation technique, EGR gases are carried out using exhaust gas recycling system EGR (Exhaust Gas Recirculation)
Burning again, with reducing energy consumption and discharge, but, current exhaust gas recycling system EGR is in big load in engine
In the case of EGR rate it is relatively low, the flame propagation velocity in influence cylinder, and then influence the discharge of delivery temperature and exhaust pollutant.
The content of the invention
In view of this, the present invention is directed to propose a kind of engine control, the method can effectively be reduced or even avoid pinking
There is and avoid excessive discharge temperature, and effectively reduce the discharge of the energy consumption and exhaust pollutant of engine.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of control method of engine, comprises the following steps：S1：Concentration according to oxygen in engine exhaust judges excess air
Whether coefficient is located in preset range；S2：If the excess air coefficient is not in the preset range, further
Judge whether the pressure of the EGR gases in EGR gas storage tanks is more than the first predetermined pressure；S3：If the EGR gases storage
The pressure of the EGR gases in gas tank is more than predetermined load more than the load of first predetermined pressure and the engine, then to institute
Stating the cylinder of engine carries out filling into the EGR gases；S4：If the pressure of the EGR gases in the EGR gas storage tanks
The dump energy more than first predetermined pressure and battery is more than predetermined electricity, then to being filled in the EGR gas storage tanks
Enter the EGR gases.
Further, the control method of the engine also includes：If the pressure of the EGR gases in the EGR gas storage tanks
Power is not more than the predetermined electricity more than the dump energy of first predetermined pressure and battery, then determine whether that vehicle is
It is no in slow down or on-position；If it is, slowed down or braking energy recovery, and using reclaim energy be described
Battery charges.
Further, the S3, further includes：If the pressure of the EGR gases in the EGR gas storage tanks is more than institute
The load of the first predetermined pressure and the engine is stated more than predetermined load, then according to the crank position and camshaft location of engine
Judge cylinder state；Moment and the amount of filling into are filled into according to what the cylinder state obtained EGR gases；According to the EGR gases
Fill into moment and the amount of filling into carries out tonifying Qi to the cylinder of the engine.
Further, the control method of the engine also includes：If the excess air coefficient is located in the preset range,
Then determine whether whether the pressure of the EGR gases in the EGR gas storage tanks is more than the second predetermined pressure, wherein, it is described
Second predetermined pressure is more than first predetermined pressure；If it is, the crank position and camshaft location according to engine judge
Cylinder state, and moment and the amount of filling into are filled into according to what the cylinder state obtained EGR gases, and according to the EGR gases
Fill into the moment and the amount of filling into carries out tonifying Qi to the cylinder of the engine.
Further, the preset range is [0.99,1.01].
Relative to prior art, the control method of engine of the present invention has the advantage that：
The control method of engine of the present invention, excess air coefficient is carried out according to the oxygen concentration that lambda sensor in system is detected
Judgement, if it is judged that excess air coefficient is not in predetermined scope, further to the air pressure in EGR gas storage tanks
Judged, if it is determined that the air pressure of EGR gas storage tanks is more than the first predetermined pressure, and engine load more than predetermined
Load, then just fill into EGR gases to the cylinder of engine, can effectively reduce or even avoid generation and the row of avoiding of pinking
Temperature spends height, and effectively reduces the discharge of the energy consumption and exhaust pollutant of engine.If it is determined that in EGR gas storage tanks
Air pressure be not greater than the first predetermined pressure, and the dump energy of battery is more than predetermined electricity, then stored up by EGR gases
Gas tank collects EGR gases, so as to realize effective recovery of energy.
It is another object of the present invention to propose a kind of control system of engine, the system can effectively be reduced or even avoided quick-fried
The generation of shake and excessive discharge temperature is avoided, and effectively reduce the discharge of the energy consumption and exhaust pollutant of engine.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of control system of engine, including：First judge module, for being judged according to the concentration of oxygen in engine exhaust
Whether amount air coefficient is located in preset range；Second judge module, it is described pre- for being not in the excess air coefficient
Determine when in scope, judge whether the pressure of the EGR gases in EGR gas storage tanks is more than the first predetermined pressure；Controller, institute
State controller and more than first predetermined pressure and described start for the pressure of EGR gases in the EGR gas storage tanks
When the load of machine is more than predetermined load, carry out filling into the EGR gases to the cylinder of the engine, and in the EGR gases
When dump energy of the pressure of the EGR gases in air accumulator not more than first predetermined pressure and battery is more than predetermined electricity,
To being filled with the EGR gases in the EGR gas storage tanks.
Further, the control system of the engine also includes：Energy recycle device, wherein, the controller is additionally operable to：
The pressure of the EGR gases in the EGR gas storage tanks more than first predetermined pressure and battery dump energy not
During more than the predetermined electricity, whether vehicle is determined whether in deceleration or on-position, if it is, controlling the energy
Retracting device slowed down or braking energy recovery, and using reclaim energy for the battery charging.
Further, the controller is additionally operable to：If the pressure of the EGR gases in the EGR gas storage tanks is more than described
The load of the first predetermined pressure and the engine is more than predetermined load, then the crank position and camshaft location according to engine are sentenced
Cut steam cylinder state；Moment and the amount of filling into are filled into according to what the cylinder state obtained EGR gases；According to the benefit of the EGR gases
Enter moment and the amount of filling into carries out tonifying Qi to the cylinder of the engine.
Further, the control system of the engine also includes：3rd judge module, in excess air coefficient position
When in the preset range, judge whether the pressure of the EGR gases in the EGR gas storage tanks is more than the second predetermined pressure,
Wherein, second predetermined pressure is more than first predetermined pressure, and the controller is additionally operable to sentence in the 3rd judge module
When the pressure of the EGR gases in the disconnected EGR gas storage tanks is more than second predetermined pressure, the bent axle position according to engine
Put and judge cylinder state with camshaft location, and moment and the amount of filling into are filled into according to what the cylinder state obtained EGR gases, with
And tonifying Qi is carried out to the cylinder of the engine according to the fill into moment and the amount of filling into of the EGR gases.
The control system of described engine has the advantage that phase with the control method of above-mentioned engine relative to prior art
Together, will not be repeated here.
It is another object of the present invention to propose a kind of vehicle, the vehicle can effectively reduce or even avoid pinking generation and
Excessive discharge temperature is avoided, and effectively reduces the discharge of the energy consumption and exhaust pollutant of engine.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of vehicle, the control system of the engine being provided with as described in above-mentioned embodiment.
Described vehicle had the advantage that relative to prior art with the control system of above-mentioned engine it is identical, herein no longer go to live in the household of one's in-laws on getting married
State.
Brief description of the drawings
The accompanying drawing for constituting a part of the invention is used for providing a further understanding of the present invention, illustrative examples of the invention and
It illustrates, for explaining the present invention, not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of the control method of the engine described in the embodiment of the present invention；
Fig. 2 is the flow chart of the engine control according to another embodiment of the present invention；
Fig. 3 is the structured flowchart of the control system of the engine described in the embodiment of the present invention；
Fig. 4 is the control system of engine another structured flowchart described in the embodiment of the present invention；And
Fig. 5 is the schematic diagram of the control system of the engine described in one embodiment of the invention.
Description of reference numerals：
The control system of 100- engines, the first judge module 10, the second judge module 20, controller 30, energy regenerating dress
Put the 40, the 3rd judge module 50,1- air filters, 2- turbocharger, 3- charge air coolers, 4- inlet manifold, 5- exhausts
Manifold, 6- condensers, 7- filters, 8- driers, 9/11/13- control valve, 10- electric compressors, 12-EGR air accumulators,
14-EGR nozzles, 15-EGR jet pipes, 16- lambda sensors.
Specific embodiment
It should be noted that in the case where not conflicting, the embodiment in the present invention and the feature in embodiment can be mutually combined.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Fig. 1 is the flow chart of the control method of engine according to an embodiment of the invention.
As shown in figure 1, the control method of engine according to an embodiment of the invention, comprises the following steps：
S101：Concentration according to oxygen in engine exhaust judges whether excess air coefficient is located in preset range.
Specifically, judgement excess air coefficient is carried out using the concentration of oxygen, excessive sky is judged by carrying out contrast with preset range
Whether whether gas coefficient is located at preset range, that is, judge excess coefficient less than 0.99 or more than 1.01, and then takes different answering
To measure.Wherein, the concentration of oxygen can be detected by corresponding sensor, when excess air coefficient is exactly fuel combustion,
The ratio of actual air quantity delivered and theoretical air demand amount, wherein, in specific example of the invention, preset range for [0.99,
1.01]。
S102：If excess air coefficient is not in preset range, the EGR in EGR gas storage tanks is determined whether
Whether the pressure of gas is more than the first predetermined pressure.
Specifically, when excess air coefficient is not at preset range, i.e., excess air coefficient is less than 0.99 or more than 1.01,
EGR gas storage tanks are carried out to judge whether to be more than by ECU (Electronic Control Unit, electronic control unit)
First predetermined pressure.Wherein, the first predetermined pressure can be pre-set pressure limit, for weighing EGR gas gas storage
Air pressure size in tank, to determine the need for carrying out corresponding tonifying Qi etc. to it.
S103：If the pressure of the EGR gases in EGR gas storage tanks is more than more than the load of the first predetermined pressure and engine
Predetermined load, then carry out filling into EGR gases to the cylinder of engine.
Specifically, if the pressure of the EGR gases in EGR gas storage tanks is big more than the load of the first predetermined pressure and engine
In predetermined load, then the crank position and camshaft location according to engine judge cylinder state；EGR is obtained according to cylinder state
Gas fills into moment and the amount of filling into；Fill into moment and the amount of filling into according to EGR gases carry out tonifying Qi to the cylinder of engine.
That is, when the load of the pressure more than the first predetermined pressure and engine of the EGR gases in EGR gas storage tanks is more than predetermined
During load, ECU triggering EGR nozzles, and carry out sentencing cylinder, export EGR moment and pulsewidth.Carrying out regulation and control by ECU can have
Effect makes excess air coefficient be close to toward 1, reduces engine consumption and discharge.
S104：If the pressure of the EGR gases in EGR gas storage tanks is not more than the first predetermined pressure and the residue electricity of battery
Amount is more than predetermined electricity, then to being filled with EGR gases in EGR gas storage tanks.
Specifically, when the pressure of the EGR gases in EGR gas storage tanks is not more than the first predetermined pressure and the residue electricity of battery
When amount is more than predetermined electricity, electric compressor will start working and EGR gas storage tanks are inflated.Wherein, pass through first
After crossing condensation, filtering, drying, can be compressed for gas by electric compressor, and then the high pressure exhaust gas of compression are stored in into EGR
In gas storage tank.
It is appreciated that storing waste gas by EGR air accumulators can reduce the waste of fuel, the recovery of the energy is carried out, and reduce
The discharge of air pollutants.
According to the control method of engine of the present invention, excess air is carried out according to the oxygen concentration that lambda sensor in system is detected
The judgement of coefficient, if it is judged that excess air coefficient is not in predetermined scope, further in EGR gas storage tanks
Air pressure is judged, if it is determined that the air pressure of EGR gas storage tanks is more than the first predetermined pressure, and the load of engine is more than
Predetermined load, then just fill into EGR gases to the cylinder of engine, can effectively reduce or even avoid the generation of pinking and keep away
Exempt from excessive discharge temperature, and effectively reduce the discharge of the energy consumption and exhaust pollutant of engine.If it is determined that EGR gas gas storage
Air pressure in tank is not greater than the first predetermined pressure, and the dump energy of battery is more than predetermined electricity, then by EGR gas
Body air accumulator collects EGR gases, so as to realize effective recovery of energy.
As shown in Fig. 2 the control method of the engine is further comprising the steps of：
If the pressure of the EGR gases in the EGR gas storage tanks is not more than first predetermined pressure and the residue of battery
Whether electricity is not more than the predetermined electricity, then determine whether vehicle in deceleration or on-position；If it is, being subtracted
The recovery of speed or braking energy, and using the energy for reclaiming for the battery charges.
That is, when the air pressure that judge in EGR gas storage tanks is not above the first predetermined pressure, and battery is surplus
Remaining electricity is also not above predetermined electricity, it is necessary to which ECU judged the working condition of vehicle, if vehicle be in slow down or
During on-position, battery is charged using brake power recovering device；Otherwise, do not charged.By to EGR gas
The pressure and battery dump energy of body air accumulator judged, and then made corresponding operation and (for example charged or do not fill
Electricity), this makes it possible to effectively carry out energy regenerating, the loss of reducing energy consumption.
If the excess air coefficient is located in the preset range, in determining whether the EGR gas storage tanks
Whether the pressure of EGR gases is more than the second predetermined pressure, wherein, second predetermined pressure is more than first predetermined pressure；
If it is, the crank position and camshaft location according to engine judge cylinder state, and EGR is obtained according to the cylinder state
Gas fills into moment and the amount of filling into, and fills into the cylinder of moment and the amount of filling into the engine according to the EGR gases
Carry out tonifying Qi.
That is, when judging that excess air coefficient is in preset range, then needing to determine whether EGR gas gas storage
Air pressure in tank whether more than the second predetermined pressure, when the air pressure in judging EGR gas storage tanks is higher than the second predetermined pressure,
ECU will trigger tonifying Qi nozzle and carry out sentencing cylinder, and export EGR moment and pulsewidth, carry out tonifying Qi operation；Otherwise, do not carry out
The tonifying Qi operation of EGR.Carrying out judgement by the air pressure to EGR gas storage tanks can effectively determine whether to store up EGR gases
Gas tank carries out tonifying Qi operation, can be prevented effectively from the waste of energy, improves the rate of recovery of energy.
The method can improve the flowing velocity of mixed gas in cylinder, mix air oil more uniform, effectively reduce oil consumption.
With reference to shown in Fig. 2, the control method of the engine can have following steps：
S201：The signals such as ECU collections gas pedal, camshaft, bent axle, gas tank pressure, engine speed and battery tension.
S202：Judge excess air coefficient whether less than 0.99 or more than 1.01；If it is, performing step S203；Otherwise,
Then perform step S208.
S203：Judge whether EGR reservoir pressures are sufficient；If it is, performing step 204；Otherwise, then S210 is performed.
S204：Judge whether in high load working condition；If it is, performing step S205；Otherwise, then step S209 is performed.
S205：EGR nozzles, control valve triggering；Further perform step S206.
S206：Carry out sentencing cylinder according to camshaft, crankshaft signal；Further perform step S207.
S207：EGR moment, pulsewidth are mended in ECU outputs.
S208：ECU to the pressure of EGR air accumulators judge whether mending EGR limit values higher than middle Smaller load；If it is, performing
Step S205；Otherwise, then step S209 is performed.
S209：Do not mend EGR.
S210：To accumulator electric-quantity, whether abundance judges ECU；If it is, performing step S211；Otherwise, then step is performed
Rapid S212.
S211：Air compressor machine unlatching work, is inflated to EGR air accumulators.
S212：Whether ECU judges vehicle in deceleration, braking state；If it is, performing step S213；Otherwise,
Then perform step S214.
S213：Battery is charged using brake energy recovering system.
S214：Battery does not charge.
According to the control method of engine of the present invention, excess air is carried out according to the oxygen concentration that lambda sensor in system is detected
The judgement of coefficient, if it is judged that excess air coefficient is not in predetermined scope, further in EGR gas storage tanks
Air pressure is judged, if it is determined that the air pressure of EGR gas storage tanks is more than the first predetermined pressure, and the load of engine is more than
Predetermined load, then just fill into EGR gases to the cylinder of engine, can effectively reduce or even avoid the generation of pinking and keep away
Exempt from excessive discharge temperature, and effectively reduce the discharge of the energy consumption and exhaust pollutant of engine.If it is determined that EGR gas gas storage
Air pressure in tank is not greater than the first predetermined pressure, and the dump energy of battery is more than predetermined electricity, then by EGR gas
Body air accumulator collects EGR gases, so as to realize effective recovery of energy.
Further, as shown in figure 3, embodiment of the invention discloses that a kind of control system 100 of engine, including：The
One judge module 10, the second judge module 20 and controller 30.
Specifically, with reference to shown in Fig. 3, the first judge module 10 is used to judge excessive according to the concentration of oxygen in engine exhaust
Whether air coefficient is located in preset range；Second judge module 20 is described pre- for being not in the excess air coefficient
Determine when in scope, judge whether the pressure of the EGR gases in EGR gas storage tanks is more than the first predetermined pressure；Controller 30
Pressure for the EGR gases in the EGR gas storage tanks is more than the load of first predetermined pressure and the engine
During more than predetermined load, carry out filling into the EGR gases to the cylinder of the engine, and in the EGR gas storage tanks
The dump energy of the pressure more than first predetermined pressure and battery of EGR gases when being more than predetermined electricity, to described
The EGR gases are filled with EGR gas storage tanks.
Wherein, the first judge module 10 carries out judgement excess air coefficient using the concentration of oxygen, right by carrying out with preset range
Than judging whether whether excess air coefficient be located at preset range, i.e. excess coefficient less than 0.99 or more than 1.01, and then adopt
Take different counter-measures.Wherein, the concentration of oxygen can be detected that excess air coefficient is exactly to fire by corresponding sensor
During material burning, the ratio of actual air quantity delivered and theoretical air demand amount, wherein, in a particular embodiment of the present invention, in advance
Scope is determined for [0.99,1.01].
When excess air coefficient is not at preset range, i.e., excess air coefficient is less than 0.99 or big for second judge module 20
In 1.01, EGR gas storage tanks are carried out by ECU judging whether more than the first predetermined pressure.Wherein, the first predetermined pressure
Can be pre-set pressure limit, for weighing air pressure size in EGR gas storage tanks, to determine the need for it
Carry out corresponding tonifying Qi treatment operation.
The pressure of EGR gas of the controller 30 in EGR gas storage tanks is big more than the load of the first predetermined pressure and engine
When predetermined load, crank position and camshaft location according to engine judge cylinder state；EGR is obtained according to cylinder state
Gas fills into moment and the amount of filling into；Fill into moment and the amount of filling into according to EGR gases carry out tonifying Qi to the cylinder of engine.
That is, when the load of the pressure more than the first predetermined pressure and engine of the EGR gases in EGR gas storage tanks is more than predetermined
During load, ECU triggering EGR nozzles, and carry out sentencing cylinder, export EGR moment and pulsewidth.Carrying out regulation and control by ECU can have
Effect makes excess air coefficient be close to toward 1, reduces engine consumption and discharge.
When the pressure of the EGR gases in EGR gas storage tanks is not more than in advance more than the dump energy of the first predetermined pressure and battery
When determining electricity, electric compressor will start working and EGR gas storage tanks are inflated.Wherein, first pass around condensation,
After filtering, drying, can be compressed for gas by electric compressor, and then the high pressure exhaust gas of compression are stored in into the storage of EGR gases
In gas tank.It is appreciated that storing waste gas by EGR holding vessels can reduce the waste of fuel, air pollutants are reduced
Discharge.
The control system of the engine, as shown in Figure 4：
If the pressure of the EGR gases in the EGR gas storage tanks is not more than first predetermined pressure and the residue of battery
Whether electricity is not more than the predetermined electricity, then determine whether vehicle in deceleration or on-position；If it is, being subtracted
The recovery of speed or braking energy, and using the energy for reclaiming for the battery charges.
That is, when the air pressure that judge in EGR gas storage tanks is not above the first predetermined pressure, and battery is surplus
Remaining electricity is also not above predetermined electricity, it is necessary to which ECU judged the working condition of vehicle, if vehicle be in slow down or
During on-position, battery is charged using brake power recovering device；Otherwise, do not charged.By to EGR gas
The pressure and battery dump energy of body air accumulator judged, and then made corresponding operation and (for example charged or do not fill
Electricity), this makes it possible to effectively carry out energy regenerating, the loss of reducing energy consumption.
Further, the control system of the engine also includes：3rd judge module (50), in the excess air system
Numerical digit judges whether the pressure of the EGR gases in the EGR gas storage tanks makes a reservation for more than second when in the preset range
Pressure, wherein, second predetermined pressure is more than first predetermined pressure, and the controller (30) is additionally operable to described the
When three judge modules (50) judge that the pressure of the EGR gases in the EGR gas storage tanks is more than second predetermined pressure,
Crank position and camshaft location according to engine judge cylinder state, and the benefit of EGR gases is obtained according to the cylinder state
Enter moment and the amount of filling into, and tonifying Qi is carried out to the cylinder of the engine according to the fill into moment and the amount of filling into of the EGR gases.
That is, when judging that excess air coefficient is in preset range, then needing to determine whether EGR gas gas storage
Air pressure in tank whether more than the second predetermined pressure, when the air pressure in judging EGR gas storage tanks is higher than the second predetermined pressure,
ECU will trigger tonifying Qi nozzle and carry out sentencing cylinder, and export EGR moment and pulsewidth, carry out tonifying Qi operation；Otherwise, do not carry out
The tonifying Qi operation of EGR.Carrying out judgement by the air pressure to EGR gas storage tanks can effectively determine whether to store up EGR gases
Gas tank carries out tonifying Qi operation, can be prevented effectively from the waste of energy, improves the rate of recovery of energy.
It follows that the control of EGR flexibly, can realize that EGR is layered, while increased air inlet Tumble and swirl, cylinder is effectively improved
The flowing velocity of interior mixed gas, mixes air oil more uniform, effectively reduces the use of oil consumption.
For example, as shown in figure 5, specifically.The control system of the engine, including：1- air filters, 2- turbines
Booster, 3- charge air coolers, 4- inlet manifold, 5- exhaust manifolds, 6- condensers, 7- filters, 8- driers, 9/11/13-
Control valve, 10- electric compressors, 12-EGR air accumulators, 14-EGR nozzles, 15-EGR jet pipes, 16- lambda sensors.
By band control valve 9 pipeline, from the house steward of exhaust manifold 5 outlet or catalyst converter after place collection excess air coefficient be less than
0.99 or the waste gas more than 1.01 operating modes, by after condenser 6, filter 7, drier 8, being pressed by electric compressor 10
Contracting, by high pressure exhaust gas after controlling valve 11, is stored into EGR air accumulators 12.In big load and middle small load condition, lead to
ECU is crossed to open the control valve 13 and EGR nozzles 14 in the downstream of EGR air accumulators 12 (EGR nozzles are fixed by EGR guide rails, and figure is not
Show), high pressure exhaust gas are evenly distributed to EGR jet pipes 15 by EGR guide rails.
Gasoline engine excess air coefficient is collected less than 0.99 or more than the waste gas under 1.01 operating modes by electric compressor 10,
It is stored in EGR air accumulators 12, reduces gasoline engine HC, CO discharge, while by forcing EGR technology under the operating mode such as big load,
HC, CO second-time burning, reduce further engine consumption.By the control system of the engine, EGR rate control can be made
Flexibly, while increased air inlet Tumble and swirl, the flowing velocity of gaseous mixture in cylinder is improved, mixes air oil more uniform,
Oil consumption can be reduced.EGR does not pollute to turbocharger 2, charge air cooler 3, inlet manifold 4, improve turbocharger 2,
The service life of charge air cooler 3, inlet manifold 4.
Under vehicle brake and deceleration regime, battery is charged using brake power recovering device, improve and start function
Amount utilization rate.
The control system of engine of the present invention, excess air coefficient is carried out according to the oxygen concentration that lambda sensor in system is detected
Judgement, if it is judged that excess air coefficient is not in predetermined scope, further to the air pressure in EGR gas storage tanks
Judged, if it is determined that the air pressure of EGR gas storage tanks is more than the first predetermined pressure, and engine load more than predetermined
Load, then just fill into EGR gases to the cylinder of engine, can effectively reduce or even avoid generation and the row of avoiding of pinking
Temperature spends height, and effectively reduces the discharge of the energy consumption and exhaust pollutant of engine.If it is determined that in EGR gas storage tanks
Air pressure be not greater than the first predetermined pressure, and the dump energy of battery is more than predetermined electricity, then stored up by EGR gases
Gas tank collects EGR gases, so as to realize effective recovery of energy.
It should be noted that the hair of the specific implementation of the control system of the engine of the embodiment of the present invention and the embodiment of the present invention
The specific implementation of the control method of motivation is similar to, and specifically refers to the description of method part, in order to reduce redundancy, does not do superfluous
State.
Further, embodiment of the invention discloses that a kind of vehicle, the vehicle is provided with the engine described in above-described embodiment
Control system.The vehicle carries out the judgement of excess air coefficient according to the oxygen concentration that lambda sensor in system is detected, if it is judged that
Excess air coefficient further judged the air pressure in EGR gas storage tanks not in predetermined scope, if it is determined that
The air pressure of EGR gas storage tanks is more than the first predetermined pressure, and the load of engine is more than predetermined load, then just to starting
The cylinder of machine fills into EGR gases, can effectively reduce or even avoid the generation of pinking and avoid excessive discharge temperature, and effectively
Reduce the discharge of the energy consumption and exhaust pollutant of engine.If it is determined that the air pressure in EGR gas storage tanks is not greater than first
Predetermined pressure, and the dump energy of battery is more than predetermined electricity, then EGR gases are collected by EGR gas storage tanks,
So as to realize effective recovery of energy.
In addition, other of vehicle according to embodiments of the present invention constitute and effect for the ordinary skill in the art all
It is known, in order to reduce redundancy, does not repeat.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in spirit of the invention and former
Within then, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of control method of engine, it is characterised in that comprise the following steps：
S1：Concentration according to oxygen in engine exhaust judges whether excess air coefficient is located in preset range；
S2：If the excess air coefficient is not in the preset range, in determining whether EGR gas storage tanks
EGR gases pressure whether be more than the first predetermined pressure；
S3：If the pressure of the EGR gases in the EGR gas storage tanks is more than first predetermined pressure and the engine
Load be more than predetermined load, then carry out filling into the EGR gases to the cylinder of the engine；
S4：If the pressure of the EGR gases in the EGR gas storage tanks is more than first predetermined pressure and battery
Dump energy is more than predetermined electricity, then to being filled with the EGR gases in the EGR gas storage tanks.
2. the control method of engine according to claim 1, it is characterised in that also include：
If the pressure of the EGR gases in the EGR gas storage tanks is not more than first predetermined pressure and the residue of battery
Whether electricity is not more than the predetermined electricity, then determine whether vehicle in deceleration or on-position；
If it is, slowed down or braking energy recovery, and using reclaim energy for the battery charging.
3. the control method of engine according to claim 1, it is characterised in that the S3, further includes：
If the pressure of the EGR gases in the EGR gas storage tanks is negative more than first predetermined pressure and the engine
Lotus is more than predetermined load, then the crank position and camshaft location according to engine judge cylinder state；
Moment and the amount of filling into are filled into according to what the cylinder state obtained EGR gases；
Fill into moment and the amount of filling into according to the EGR gases carry out tonifying Qi to the cylinder of the engine.
4. the control method of engine according to claim 1, it is characterised in that also include：
If the excess air coefficient is located in the preset range, in determining whether the EGR gas storage tanks
Whether the pressure of EGR gases is more than the second predetermined pressure, wherein, second predetermined pressure is more than first predetermined pressure；
If it is, the crank position and camshaft location according to engine judge cylinder state, and obtained according to the cylinder state
Moment and the amount of filling into are filled into EGR gases, and moment and the amount of filling into are filled into the engine according to the EGR gases
Cylinder carry out tonifying Qi.
5. the control method of the engine according to claim any one of 1-4, it is characterised in that the preset range is
[0.99,1.01].
6. a kind of control system of engine, it is characterised in that including：
First judge module (10), it is predetermined for judging whether excess air coefficient is located at according to the concentration of oxygen in engine exhaust
In the range of；
Second judge module (20), for when the excess air coefficient is not in the preset range, judging EGR
Whether the pressure of the EGR gases in gas storage tank is more than the first predetermined pressure；
Controller (30), the controller (30) is more than for the pressure of the EGR gases in the EGR gas storage tanks
When the load of first predetermined pressure and the engine is more than predetermined load, filled into the cylinder of the engine described in
EGR gases, and the pressure of the EGR gases in the EGR gas storage tanks is not more than first predetermined pressure and battery
Dump energy when being more than predetermined electricity, to being filled with the EGR gases in the EGR gas storage tanks.
7. the control system of engine according to claim 6, it is characterised in that also include：
Energy recycle device (40), wherein, the controller (30) is additionally operable to：EGR in the EGR gas storage tanks
When dump energy of the pressure of gas not more than first predetermined pressure and battery is not more than the predetermined electricity, further sentence
Disconnected vehicle whether in slowing down or on-position, if it is, controlling the energy recycle device to be slowed down or braking energy
Reclaim, and using the energy for reclaiming for the battery charges.
8. the control system of engine according to claim 6, it is characterised in that the controller (30) is additionally operable to：
If the pressure of the EGR gases in the EGR gas storage tanks is negative more than first predetermined pressure and the engine
Lotus is more than predetermined load, then the crank position and camshaft location according to engine judge cylinder state；
Moment and the amount of filling into are filled into according to what the cylinder state obtained EGR gases；
Fill into moment and the amount of filling into according to the EGR gases carry out tonifying Qi to the cylinder of the engine.
9. the control system of engine according to claim 6, it is characterised in that also include：3rd judge module (50),
For when the excess air coefficient is located in the preset range, judging the EGR gases in the EGR gas storage tanks
Whether pressure is more than the second predetermined pressure, wherein, second predetermined pressure is more than first predetermined pressure,
The controller (30) is additionally operable to the EGR in the 3rd judge module (50) judges the EGR gas storage tanks
When the pressure of gas is more than second predetermined pressure, crank position and camshaft location according to engine judge cylinder state,
And moment and the amount of filling into are filled into according to what the cylinder state obtained EGR gases, and the moment is filled into according to the EGR gases
With the amount of filling into tonifying Qi is carried out to the cylinder of the engine.
10. a kind of vehicle, it is characterised in that the control system just like the engine described in claim any one of 6-9 is set.
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| CN201510859172.9A CN106812615A (en) | 2015-11-30 | 2015-11-30 | The control method of engine, system and vehicle |
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| CN201510859172.9A CN106812615A (en) | 2015-11-30 | 2015-11-30 | The control method of engine, system and vehicle |
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