CN107366579A - Control method, device and the vehicle of engine system - Google Patents
Control method, device and the vehicle of engine system Download PDFInfo
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- CN107366579A CN107366579A CN201610318706.1A CN201610318706A CN107366579A CN 107366579 A CN107366579 A CN 107366579A CN 201610318706 A CN201610318706 A CN 201610318706A CN 107366579 A CN107366579 A CN 107366579A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D2041/0017—Controlling intake air by simultaneous control of throttle and exhaust gas recirculation
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Abstract
The invention discloses a kind of control method of engine system, device and vehicle, this method includes：Obtain the air inlet relevant parameter of engine system；The equation of gas state established according to air inlet relevant parameter in inlet manifold, the equation of gas state in inlet manifold include the state equation of the temperature of the gas in inlet manifold, pressure and oxygen content；The equation of gas state in egr system is established according to air inlet relevant parameter, the equation of gas state includes the temperature of gas and the state equation of oxygen content in low pressure EGR system in low pressure EGR system；The equation of gas state in the equation of gas state and egr system in inlet manifold is solved；Solving result is brought into default flowing gas state equation to obtain the gas flow rate demand at high pressure EGR valve, low pressure EGR valve and throttler valve, and high pressure EGR valve, low pressure EGR valve and throttler valve are controlled.The control method of the engine system of the embodiment of the present invention can effectively lift the operating efficiency of engine.
Description
Technical field
The present invention relates to automobile technical field, the more particularly to a kind of control method of engine system, device and vehicle.
Background technology
Gas recirculation system (EGR, Exhaust Gas Recirculation) is widely used for reducing the nitrogen of engine
Emissions of oxides and exhaust system temperature., specifically can be by controlling low pressure EGR system and high pressure EGR system in correlation technique
The aperture of middle EGR valve, the oxygen content in inlet manifold is set to maintain in target zone, or control low pressure EGR system and high pressure
The mode of mixing ratio realizes the dilution to air inlet between egr system.
Aforesaid way has the following disadvantages：It is by controlling low pressure EGR system and high pressure EGR system to control in air inlet
Oxygen content.But influence the operating efficiencies such as discharged nitrous oxides and the exhaust system temperature of engine be depend on it is a variety of because
Element, therefore, the mode of the oxygen content in control air inlet is more unilateral, lacks accuracy.
The content of the invention
It is contemplated that at least solves one of technical problem in above-mentioned correlation technique to a certain extent.
Therefore, it is an object of the present invention to propose a kind of control method of engine system, this method can be effective
Lift the operating efficiency of engine.
It is another object of the present invention to provide a kind of control device of engine system.
It is yet a further object of the present invention to provide a kind of vehicle.
To achieve these goals, the first aspect of the present invention discloses a kind of control method of engine system, described
Engine system includes throttler valve, low pressure EGR system and high pressure EGR system, and the low pressure EGR system includes low pressure EGR valve,
The high pressure EGR system includes high pressure EGR valve, and the control method comprises the following steps：Obtain engine system enters gas phase
Related parameter；The equation of gas state established according to the air inlet relevant parameter in inlet manifold, the gas in the inlet manifold
The state equation of temperature of the state equation including the gas in inlet manifold, pressure and oxygen content；Join according to the air inlet is related
Number establishes the equation of gas state in the egr system, and the equation of gas state includes low pressure EGR system in the low pressure EGR system
The temperature of middle gas and the state equation of oxygen content；To in the equation of gas state in the inlet manifold and the egr system
The equation of gas state solves；Solving result is brought into default flowing gas state equation to obtain high pressure EGR valve, low pressure EGR
Gas flow rate demand at valve and throttler valve, and high pressure EGR valve, low pressure EGR valve and the throttler valve are controlled.
The control method of engine system according to embodiments of the present invention, establish intake air temperature in inlet manifold, air inlet
Relation between pressure and oxygen content three and egr system, it is then based on the relation and solves to obtain the gas of throttler valve and EGE valves
Body demand flow velocity, and the aperture of throttler valve and EGE valves is accurately controlled based on gas demand flow velocity, realize to gas in inlet manifold
The accurate control of the temperature of body, pressure and oxygen content, and then effectively lift the operating efficiency of engine.
In addition, the control method of engine system according to the above embodiment of the present invention can also have skill additional as follows
Art feature：
In some instances, the air inlet relevant parameter includes gas flow rate at high pressure EGR valve, at low pressure EGR valve
Gas flow rate, ideal gas constant, inlet manifold, exhaust manifold, high pressure EGR system and section at gas flow rate, throttler valve
Gas temperature, predetermined thermal ratio, the gas pressure in inlet manifold and the inlet manifold volume of air valve upstream, gas are from air inlet
Manifold flows into the induction air flow ratio in cylinder, the oxygen content of gas, the oxygen content of throttler valve upstream gas, exhaust in inlet manifold
The oxygen content of gas, the gas pressure of throttler valve upstream, the gas body between low pressure EGR valve to throttler valve in manifold
At gas flow rate and air inlet mouth of pipe at product, low pressure EGR valve in the flow velocity of fresh air, the temperature and fresh air of fresh air
Oxygen content.
In some instances, the equation of gas state in the inlet manifold is：
Wherein, R is ideal gas constant, Tjq、Tpq、Thegr、TjqfInlet manifold, exhaust manifold, high pressure EGR are represented respectively
The gas temperature of system and throttler valve upstream, γ are predetermined thermal ratio, PjqAnd VjqThe gas pressure in inlet manifold is represented respectively
Power and inlet manifold volume, WinRepresent induction air flow ratio, F that gas is flowed into cylinder from inlet manifoldjq、FjqfAnd FpqRepresent respectively
The oxygen content of gas in inlet manifold, throttler valve upstream and exhaust manifold.
In some instances, the equation of gas state is in the egr system：
Wherein, PjqfRepresent gas pressure, the V of throttle valve body upstreamjqfRepresent from low pressure EGR valve to throttle valve body it
Between gas volume, WlegrAnd WxinRepresent flow velocity, the T of fresh air at gas flow rate and the air inlet mouth of pipe at low pressure EGR valvexin
Represent the temperature of fresh air, the oxygen content of gas is related to the oxygen content of waste gas in exhaust manifold at low pressure EGR valve, be expressed as
Fpq(t), t is the time related to engine aftertreatment system design, FxinRepresent the oxygen content in fresh air.
In some instances, before solving result to be brought into default flowing gas state equation, in addition to：Establish institute
Default flowing gas state equation is stated, the default flowing gas state equation is：
Whegr=Whegr 1+Whegr 2,
Wlegr=Wlegr 2,
Wjqf=Wjqf 1+Wjqf 2；
Wherein, Whegr、Wlegr、WjqfGas flow rate respectively at high pressure EGR valve, low pressure EGR valve and throttler valve, its
In, subscript " 1 " represents fast change, and subscript " 2 " represents slow change.
The embodiment of second aspect of the present invention discloses a kind of control device of engine system, the engine system bag
Throttler valve, low pressure EGR system and high pressure EGR system are included, the low pressure EGR system includes low pressure EGR valve, the high pressure EGR
System includes high pressure EGR valve, and the control device includes：Acquisition module, for obtaining the air inlet relevant parameter of engine system；
Module is established, for the equation of gas state established according to the air inlet relevant parameter in inlet manifold, in the inlet manifold
The equation of gas state include the state equation of the temperature of gas in inlet manifold, pressure and oxygen content, and according to it is described enter
Gas phase related parameter establishes the equation of gas state in the egr system, and the equation of gas state includes low pressure in the low pressure EGR system
The state equation of the temperature of gas and oxygen content in egr system；Control module, for the gaseous state in the inlet manifold
In equation and the egr system equation of gas state solve, and by solving result bring into default flowing gas state equation with
The gas flow rate demand at high pressure EGR valve, low pressure EGR valve and throttler valve is obtained, and to the high pressure EGR valve, low pressure EGR valve
It is controlled with throttler valve.
The control device of engine system according to embodiments of the present invention, establish intake air temperature in inlet manifold, air inlet
Relation between pressure and oxygen content three and egr system, it is then based on the relation and solves to obtain the gas of throttler valve and EGE valves
Body demand flow velocity, and the aperture of throttler valve and EGE valves is accurately controlled based on gas demand flow velocity, realize to gas in inlet manifold
The accurate control of the temperature of body, pressure and oxygen content, and then effectively lift the operating efficiency of engine.
In addition, the control device of engine system according to the above embodiment of the present invention can also have skill additional as follows
Art feature：
In some instances, the equation of gas state in the inlet manifold is：
Wherein, R is ideal gas constant, Tjq、Tpq、Thegr、TjqfInlet manifold, exhaust manifold, high pressure EGR are represented respectively
The gas temperature of system and throttler valve upstream, γ are predetermined thermal ratio, PjqAnd VjqThe gas pressure in inlet manifold is represented respectively
Power and inlet manifold volume, WinRepresent induction air flow ratio, F that gas is flowed into cylinder from inlet manifoldjq、FjqfAnd FpqRepresent respectively
The oxygen content of gas in inlet manifold, throttler valve upstream and exhaust manifold.
In some instances, the equation of gas state is in the egr system：
Wherein, PjqfRepresent gas pressure, the V of throttle valve body upstreamjqfRepresent from low pressure EGR valve to throttle valve body it
Between gas volume, WlegrAnd WxinRepresent flow velocity, the T of fresh air at gas flow rate and the air inlet mouth of pipe at low pressure EGR valvexin
Represent the temperature of fresh air, the oxygen content of gas is related to the oxygen content of waste gas in exhaust manifold at low pressure EGR valve, be expressed as
Fpq(t), t is the time related to engine aftertreatment system design, FxinRepresent the oxygen content in fresh air.
In some instances, before the control module brings solving result into default flowing gas state equation,
The module of establishing is additionally operable to establish the default flowing gas state equation, the default flowing gas state equation
For：
Whegr=Whegr 1+Whegr 2,
Wlegr=Wlegr 2,
Wjqf=Wjqf 1+Wjqf 2；
Wherein, Whegr、Wlegr、WjqfGas flow rate respectively at high pressure EGR valve, low pressure EGR valve and throttler valve, its
In, subscript " 1 " represents fast change, and subscript " 2 " represents slow change.
The embodiment of third aspect present invention discloses a kind of vehicle, including：According to above-mentioned second aspect embodiment
Engine system control device.The vehicle can establish intake air temperature in inlet manifold, admission pressure and oxygen content three
Relation between person and egr system, it is then based on the relation and solves to obtain the gas demand flow velocity of throttler valve and EGE valves, and
The aperture of throttler valve and EGE valves is accurately controlled based on gas demand flow velocity, is realized to the temperature of gas, pressure in inlet manifold
With the accurate control of oxygen content, and then effectively lifted engine operating efficiency.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the flow chart of the control method of engine system according to an embodiment of the invention；
Fig. 2 is the structured flowchart of the control device of engine system according to an embodiment of the invention；
Fig. 3 be engine system according to an embodiment of the invention control method in engine system schematic diagram.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
Control method, device and the vehicle of engine system according to embodiments of the present invention are described below in conjunction with accompanying drawing.
Before the control method of engine system according to embodiments of the present invention is described, first with reference to accompanying drawing 3 to this hair
Engine system in the control method of the engine system of bright embodiment is described.
As shown in figure 3, engine system includes EGR control system, EGR control system (is not shown including controller in Fig. 3
Go out), high pressure EGR system and low pressure EGR system.Gas into inlet manifold is made up of three parts, from external engine
Fresh air, the high-temp waste gas from high pressure EGR system and the waste gas after cooling from low pressure EGR system.Fresh air
The pumping chamber of booster is flowed into by air inlet pipe, cooler 1 is flowed into along air inlet pipe after being pressurized in pumping chamber, flows after cooling
Enter in inlet manifold；Portion in exhaust manifold flows into the pipeline being connected with high pressure EGR valve, when high pressure EGR valve is opened,
Waste gas flows through valve body and enters inlet manifold；Portion in blast pipe is flowed at low pressure EGR valve after the cooling of cooler 2,
When low pressure EGR valve is opened, exhaust enters air inlet pipe, and the fresh air with flowing into air inlet pipe mixes.
As shown in figure 1, the control method of engine system according to an embodiment of the invention, comprises the following steps：
S101：Obtain the air inlet relevant parameter of engine system.
With reference to shown in Fig. 3, the air inlet relevant parameter of engine system includes but is not limited to：Gas stream at high pressure EGR valve
Speed, the gas flow rate at low pressure EGR valve, the gas flow rate at throttler valve, ideal gas constant, inlet manifold, exhaust manifold,
High pressure EGR system and the gas temperature of throttler valve upstream, predetermined thermal ratio, the gas pressure in inlet manifold and inlet manifold
Volume, gas flow into the oxygen content of gas, throttler valve upstream gas in the induction air flow ratio in cylinder, inlet manifold from inlet manifold
The oxygen content of gas, the gas pressure of throttler valve upstream in the oxygen content of body, exhaust manifold, from low pressure EGR valve to air throttle
The flow velocity of fresh air, the temperature of fresh air at gas flow rate at gas volume, low pressure EGR valve and air inlet mouth of pipe between valve
Oxygen content in degree and fresh air.
S102：The equation of gas state established according to air inlet relevant parameter in inlet manifold, the gas shape in inlet manifold
The state equation of temperature of the state equation including the gas in inlet manifold, pressure and oxygen content.
The equation of gas state in inlet manifold is, for example,：
Wherein, R is ideal gas constant, Tjq、Tpq、Thegr、TjqfInlet manifold, exhaust manifold, high pressure EGR are represented respectively
The gas temperature of system and throttler valve upstream, γ are predetermined thermal ratio, PjqAnd VjqThe gas pressure in inlet manifold is represented respectively
Power and inlet manifold volume, WinRepresent induction air flow ratio, F that gas is flowed into cylinder from inlet manifoldjq、FjqfAnd FpqRepresent respectively
The oxygen content of gas in inlet manifold, throttler valve upstream and exhaust manifold.
S103：The equation of gas state in egr system is established according to air inlet relevant parameter, gaseous state in low pressure EGR system
Equation includes the temperature of gas and the state equation of oxygen content in low pressure EGR system.
The equation of gas state is, for example, in egr system：
Wherein, PjqfRepresent gas pressure, the V of throttle valve body upstreamjqfRepresent from low pressure EGR valve to throttle valve body it
Between gas volume, WlegrAnd WxinRepresent flow velocity, the T of fresh air at gas flow rate and the air inlet mouth of pipe at low pressure EGR valvexin
Represent the temperature of fresh air, the oxygen content of gas is related to the oxygen content of waste gas in exhaust manifold at low pressure EGR valve, be expressed as
Fpq(t), t is the time related to engine aftertreatment system design, FxinRepresent the oxygen content in fresh air.
S104：The equation of gas state in the equation of gas state and egr system in inlet manifold is solved.
Specifically, according to the operating condition of engine, with reference to singular perturbation theory, respectively to the gas shape in inlet manifold
The equation of gas state is solved in state equation and egr system, and the equation of gas state out of inlet manifold can obtain high pressure
The gas at the gas flow rate slowly varying component and throttler valve at gas flow rate slowly varying component, low pressure EGR valve at EGR valve
Flow velocity slowly varying component；The equation of gas state can obtain the fast change component of gas flow rate at high pressure EGR valve from egr system
With the fast change component of gas flow rate at throttler valve.
S105：Bring solving result into default flowing gas state equation with obtain high pressure EGR valve, low pressure EGR valve and
Gas flow rate demand at throttler valve, and high pressure EGR valve, low pressure EGR valve and throttler valve are controlled.That is,
Bringing the fast change component of gas flow rate and gas flow rate slowly varying component into default flowing gas state equation can be with solution
Obtain the gas flow rate demand at current high pressure EGR valve, the gas flow rate demand at low pressure EGR valve and the gas at throttler valve
Rate of flow of fluid demand, and then, can be corresponding with aperture according to the flow velocity for solving obtained each gas flow rate demand and each valve
Relation property, the aperture of each valve is adjusted, so as to realize the accurate control to the temperature of gas, pressure and oxygen content in inlet manifold
System.
Further, before solving result to be brought into default flowing gas state equation, this method also includes：Establish
Default flowing gas state equation, default flowing gas state equation are：
Whegr=Whegr 1+Whegr 2,
Wlegr=Wlegr 2,
Wjqf=Wjqf 1+Wjqf 2；
Wherein, Whegr、Wlegr、WjqfRespectively the gas flow rate at high pressure EGR valve, the gas flow rate at low pressure EGR valve and
Gas flow rate at throttler valve, wherein, subscript " 1 " represents fast change, and subscript " 2 " represents slow change.
Specifically, high pressure EGR system and low pressure EGR system have different response characteristics, vaporous to entering in order to realize
The accurate control of state (such as intake air temperature, admission pressure and oxygen content), high pressure EGR system and gas in inlet manifold are established respectively
The relation and low pressure EGR system of body state and the relation of gaseous state in inlet manifold, wherein, high pressure EGR system has quick
The feature of response, intake air temperature and admission pressure are mainly influenceed during its work；Low pressure EGR system is due to volume relatively high pressure EGR
System is larger, therefore the response time is longer, and the oxygen content in intake air temperature and air inlet is mainly influenceed during its work.Based on this, adopt
With singular perturbation theory, the flowing gas state control established at above-mentioned high pressure EGR valve, low pressure EGR valve and throttle valve body
Equation.
The control method of engine system according to embodiments of the present invention, establish intake air temperature in inlet manifold, air inlet
Relation between pressure and oxygen content three and egr system, it is then based on the relation and solves to obtain the gas of throttler valve and EGE valves
Body demand flow velocity, and the aperture of throttler valve and EGE valves is accurately controlled based on gas demand flow velocity, realize to gas in inlet manifold
The accurate control of the temperature of body, pressure and oxygen content, and then effectively lift the operating efficiency of engine.
Fig. 2 is the structured flowchart of the control device of engine system according to an embodiment of the invention.As shown in Fig. 2
The control device 200 of engine system according to an embodiment of the invention, including：Acquisition module 210, establish the and of module 220
Control module 230.
Wherein, acquisition module 210 is used for the air inlet relevant parameter for obtaining engine system.Establish module 220 and be used for basis
The equation of gas state that air inlet relevant parameter is established in inlet manifold, the equation of gas state in inlet manifold include inlet manifold
The state equation of the temperature of interior gas, pressure and oxygen content, and gas in the egr system is established according to air inlet relevant parameter
State equation, the equation of gas state includes the temperature of gas and the state side of oxygen content in low pressure EGR system in low pressure EGR system
Journey.Control module 230 is used to solve the equation of gas state in the equation of gas state and egr system in inlet manifold, and will
Solving result brings default flowing gas state equation into obtain the gas at high pressure EGR valve, low pressure EGR valve and throttler valve
Flow rate requirement, and high pressure EGR valve, low pressure EGR valve and throttler valve are controlled.
Further, the equation of gas state in inlet manifold is：
Wherein, R is ideal gas constant, Tjq、Tpq、Thegr、TjqfInlet manifold, exhaust manifold, high pressure EGR are represented respectively
The gas temperature of system and throttler valve upstream, γ are predetermined thermal ratio, PjqAnd VjqThe gas pressure in inlet manifold is represented respectively
Power and inlet manifold volume, WinRepresent induction air flow ratio, F that gas is flowed into cylinder from inlet manifoldjq、FjqfAnd FpqRepresent respectively
The oxygen content of gas in inlet manifold, throttler valve upstream and exhaust manifold.
Further, the equation of gas state is in egr system：
Wherein, PjqfRepresent gas pressure, the V of throttle valve body upstreamjqfRepresent from low pressure EGR valve to throttle valve body it
Between gas volume, WlegrAnd WxinRepresent flow velocity, the T of fresh air at gas flow rate and the air inlet mouth of pipe at low pressure EGR valvexin
Represent the temperature of fresh air, the oxygen content of gas is related to the oxygen content of waste gas in exhaust manifold at low pressure EGR valve, be expressed as
Fpq(t), t is the time related to engine aftertreatment system design, FxinRepresent the oxygen content in fresh air.
In one embodiment of the invention, solving result is brought into default flowing gas state in control module 230
Before equation, establish module 220 and be additionally operable to establish default flowing gas state equation, default flowing gas state equation
For：
Whegr=Whegr 1+Whegr 2,
Wlegr=Wlegr 2,
Wjqf=Wjqf 1+Wjqf 2；
Wherein, Whegr、Wlegr、WjqfGas flow rate respectively at high pressure EGR valve, low pressure EGR valve and throttler valve, its
In, subscript " 1 " represents fast change, and subscript " 2 " represents slow change.
The control device of engine system according to embodiments of the present invention, establish intake air temperature in inlet manifold, air inlet
Relation between pressure and oxygen content three and egr system, it is then based on the relation and solves to obtain the gas of throttler valve and EGE valves
Body demand flow velocity, and the aperture of throttler valve and EGE valves is accurately controlled based on gas demand flow velocity, realize to gas in inlet manifold
The accurate control of the temperature of body, pressure and oxygen content, and then effectively lift the operating efficiency of engine.
It should be noted that the specific implementation of the control device of the engine system of the embodiment of the present invention and the present invention
The specific implementation of the control method of the engine system of embodiment is similar, specifically refers to the description of method part, herein
Do not repeat.
Embodiment of the invention discloses that a kind of vehicle, including：According to the engine described in any one above-mentioned embodiment
The control device of system.The vehicle can effectively lift the operating efficiency of engine.
In addition, other compositions of vehicle according to embodiments of the present invention and effect are for one of ordinary skill in the art
For be all known, in order to reduce redundancy, do not repeat.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
It is that must be directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff can be carried out the different embodiments or example and the feature of different embodiments or example described in this specification
With reference to and combination.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
1. a kind of control method of engine system, it is characterised in that the engine system includes throttler valve, low pressure EGR
System and high pressure EGR system, the low pressure EGR system include low pressure EGR valve, and the high pressure EGR system includes high pressure EGR valve,
The control method comprises the following steps：
Obtain the air inlet relevant parameter of engine system；
The equation of gas state established according to the air inlet relevant parameter in inlet manifold, the gaseous state in the inlet manifold
The state equation of temperature of the equation including the gas in inlet manifold, pressure and oxygen content；
The equation of gas state in the egr system is established according to the air inlet relevant parameter, gas shape in the low pressure EGR system
State equation includes the temperature of gas and the state equation of oxygen content in low pressure EGR system；
The equation of gas state in the equation of gas state in the inlet manifold and the egr system is solved；
Solving result is brought into default flowing gas state equation to obtain at high pressure EGR valve, low pressure EGR valve and throttler valve
Gas flow rate demand, and high pressure EGR valve, low pressure EGR valve and the throttler valve are controlled.
2. the control method of engine system according to claim 1, it is characterised in that the air inlet relevant parameter includes
The gas flow rate at gas flow rate, low pressure EGR valve, the gas flow rate at throttler valve, perfect gas at high pressure EGR valve is normal
Number, inlet manifold, exhaust manifold, high pressure EGR system and the gas temperature of throttler valve upstream, predetermined thermal ratio, inlet manifold
Interior gas pressure and inlet manifold volume, gas flow into gas in the induction air flow ratio in cylinder, inlet manifold from inlet manifold
Oxygen content, the oxygen content of throttler valve upstream gas, in exhaust manifold gas oxygen content, the gas pressure of throttler valve upstream
Power, from low pressure EGR valve to the gas volume throttler valve, it is fresh at the gas flow rate at low pressure EGR valve and air inlet mouth of pipe
Oxygen content in the flow velocity of air, the temperature and fresh air of fresh air.
3. the control method of engine system according to claim 1 or 2, it is characterised in that in the inlet manifold
The equation of gas state is：
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<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
</mrow>
<msub>
<mi>V</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
</mfrac>
<mrow>
<mo>(</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>h</mi>
<mi>e</mi>
<mi>g</mi>
<mi>r</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>,</mo>
</mrow>
<mrow>
<msub>
<mover>
<mi>F</mi>
<mo>&CenterDot;</mo>
</mover>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>RT</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
</mrow>
<mrow>
<msub>
<mi>P</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<msub>
<mi>V</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
</mrow>
</mfrac>
<mo>&lsqb;</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>h</mi>
<mi>e</mi>
<mi>g</mi>
<mi>r</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>p</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>;</mo>
</mrow>
Wherein, R is ideal gas constant, Tjq、Tpq、Thegr、TjqfInlet manifold, exhaust manifold, high pressure EGR system are represented respectively
Gas temperature, γ with throttler valve upstream are predetermined thermal ratio, PjqAnd VjqRespectively represent inlet manifold in gas pressure and
Inlet manifold volume, WinRepresent induction air flow ratio, F that gas is flowed into cylinder from inlet manifoldjq、FjqfAnd FpqAir inlet is represented respectively
The oxygen content of gas in manifold, throttler valve upstream and exhaust manifold.
4. the control method of engine system according to claim 1 or 2, it is characterised in that gas in the egr system
State equation is：
<mrow>
<msub>
<mover>
<mi>T</mi>
<mo>&CenterDot;</mo>
</mover>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>RT</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
</mrow>
<mrow>
<msub>
<mi>P</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<msub>
<mi>V</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
</mrow>
</mfrac>
<mo>&lsqb;</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>l</mi>
<mi>e</mi>
<mi>g</mi>
<mi>r</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>&gamma;T</mi>
<mrow>
<mi>l</mi>
<mi>e</mi>
<mi>g</mi>
<mi>r</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>T</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>x</mi>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>&gamma;T</mi>
<mrow>
<mi>x</mi>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>T</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>T</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>&gamma;T</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>,</mo>
</mrow>
<mrow>
<msub>
<mover>
<mi>F</mi>
<mo>&CenterDot;</mo>
</mover>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>RT</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
</mrow>
<mrow>
<msub>
<mi>P</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<msub>
<mi>V</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
</mrow>
</mfrac>
<mo>&lsqb;</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>l</mi>
<mi>e</mi>
<mi>g</mi>
<mi>r</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>p</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
<mo>-</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>x</mi>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>x</mi>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>;</mo>
</mrow>
Wherein, PjqfRepresent gas pressure, the V of throttle valve body upstreamjqfRepresent between low pressure EGR valve to throttle valve body
Gas volume, WlegrAnd WxinRepresent flow velocity, the T of fresh air at gas flow rate and the air inlet mouth of pipe at low pressure EGR valvexinRepresent
The oxygen content of gas is related to the oxygen content of waste gas in exhaust manifold at the temperature of fresh air, low pressure EGR valve, is expressed as Fpq
(t), t is the time related to engine aftertreatment system design, FxinRepresent the oxygen content in fresh air.
5. the control method of engine system according to claim 1 or 2, it is characterised in that brought into by solving result
Before default flowing gas state equation, in addition to：Establish the default flowing gas state equation, the default gas
Body flow regime equation is：
Whegr=Whegr 1+Whegr 2,
Wlegr=Wlegr 2,
Wjqf=Wjqf 1+Wjqf 2；
Wherein, Whegr、Wlegr、WjqfGas flow rate respectively at high pressure EGR valve, low pressure EGR valve and throttler valve, wherein, on
Mark " 1 " and represent fast change, subscript " 2 " represents slow change.
6. a kind of control device of engine system, it is characterised in that the engine system includes throttler valve, low pressure EGR
System and high pressure EGR system, the low pressure EGR system include low pressure EGR valve, and the high pressure EGR system includes high pressure EGR valve,
The control device includes：
Acquisition module, for obtaining the air inlet relevant parameter of engine system；
Module is established, for the equation of gas state established according to the air inlet relevant parameter in inlet manifold, the air inlet discrimination
The state equation of temperature of the equation of gas state including the gas in inlet manifold, pressure and oxygen content in pipe, and according to institute
State air inlet relevant parameter and establish the equation of gas state in the egr system, the equation of gas state includes in the low pressure EGR system
The state equation of the temperature of gas and oxygen content in low pressure EGR system；
Control module, for asking the equation of gas state in the equation of gas state in the inlet manifold and the egr system
Solution, and solving result is brought into default flowing gas state equation to obtain high pressure EGR valve, low pressure EGR valve and throttler valve
The gas flow rate demand at place, and high pressure EGR valve, low pressure EGR valve and the throttler valve are controlled.
7. the control device of engine system according to claim 6, it is characterised in that the gas in the inlet manifold
State equation is：
<mrow>
<msub>
<mover>
<mi>T</mi>
<mo>&CenterDot;</mo>
</mover>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>RT</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
</mrow>
<mrow>
<msub>
<mi>P</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<msub>
<mi>V</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
</mrow>
</mfrac>
<mo>&lsqb;</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>&gamma;T</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>T</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>h</mi>
<mi>e</mi>
<mi>g</mi>
<mi>r</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>&gamma;T</mi>
<mrow>
<mi>h</mi>
<mi>e</mi>
<mi>g</mi>
<mi>r</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>T</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>T</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>&gamma;T</mi>
<mrow>
<mi>p</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>,</mo>
</mrow>
<mrow>
<msub>
<mover>
<mi>P</mi>
<mo>&CenterDot;</mo>
</mover>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>RT</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
</mrow>
<msub>
<mi>V</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
</mfrac>
<mrow>
<mo>(</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>h</mi>
<mi>e</mi>
<mi>g</mi>
<mi>r</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>,</mo>
</mrow>
<mrow>
<msub>
<mover>
<mi>F</mi>
<mo>&CenterDot;</mo>
</mover>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>RT</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
</mrow>
<mrow>
<msub>
<mi>P</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<msub>
<mi>V</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
</mrow>
</mfrac>
<mo>&lsqb;</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>h</mi>
<mi>e</mi>
<mi>g</mi>
<mi>r</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>p</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>;</mo>
</mrow>
Wherein, R is ideal gas constant, Tjq、Tpq、Thegr、TjqfInlet manifold, exhaust manifold, high pressure EGR system are represented respectively
Gas temperature, γ with throttler valve upstream are predetermined thermal ratio, PjqAnd VjqRespectively represent inlet manifold in gas pressure and
Inlet manifold volume, WinRepresent induction air flow ratio, F that gas is flowed into cylinder from inlet manifoldjq、FjqfAnd FpqAir inlet is represented respectively
The oxygen content of gas in manifold, throttler valve upstream and exhaust manifold.
8. the control device of engine system according to claim 6, it is characterised in that gas shape in the egr system
State equation is：
<mrow>
<msub>
<mover>
<mi>T</mi>
<mo>&CenterDot;</mo>
</mover>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>RT</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
</mrow>
<mrow>
<msub>
<mi>P</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<msub>
<mi>V</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
</mrow>
</mfrac>
<mo>&lsqb;</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>l</mi>
<mi>e</mi>
<mi>g</mi>
<mi>r</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>&gamma;T</mi>
<mrow>
<mi>l</mi>
<mi>e</mi>
<mi>g</mi>
<mi>r</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>T</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>x</mi>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>&gamma;T</mi>
<mrow>
<mi>x</mi>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>T</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>T</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>&gamma;T</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>,</mo>
</mrow>
<mrow>
<msub>
<mover>
<mi>F</mi>
<mo>&CenterDot;</mo>
</mover>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>RT</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
</mrow>
<mrow>
<msub>
<mi>P</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<msub>
<mi>V</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
</mrow>
</mfrac>
<mo>&lsqb;</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>l</mi>
<mi>e</mi>
<mi>g</mi>
<mi>r</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>p</mi>
<mi>q</mi>
</mrow>
</msub>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
<mo>-</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>W</mi>
<mrow>
<mi>x</mi>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>x</mi>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>j</mi>
<mi>q</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>;</mo>
</mrow>
Wherein, PjqfRepresent gas pressure, the V of throttle valve body upstreamjqfRepresent between low pressure EGR valve to throttle valve body
Gas volume, WlegrAnd WxinRepresent flow velocity, the T of fresh air at gas flow rate and the air inlet mouth of pipe at low pressure EGR valvexinRepresent
The oxygen content of gas is related to the oxygen content of waste gas in exhaust manifold at the temperature of fresh air, low pressure EGR valve, is expressed as Fpq
(t), t is the time related to engine aftertreatment system design, FxinRepresent the oxygen content in fresh air.
9. the control device of engine system according to claim 6, it is characterised in that will be solved in the control module
As a result bring into before default flowing gas state equation, the module of establishing is additionally operable to establish the default gas flowing shape
State equation, the default flowing gas state equation are：
Whegr=Whegr 1+Whegr 2,
Wlegr=Wlegr 2,
Wjqf=Wjqf 1+Wjqf 2；
Wherein, Whegr、Wlegr、WjqfGas flow rate respectively at high pressure EGR valve, low pressure EGR valve and throttler valve, wherein, on
Mark " 1 " and represent fast change, subscript " 2 " represents slow change.
A kind of 10. vehicle, it is characterised in that including：The control dress of engine system according to claim any one of 6-9
Put.
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