CN114738135A - Gas flow reaction time calculation method, device, equipment and readable storage medium - Google Patents
Gas flow reaction time calculation method, device, equipment and readable storage medium Download PDFInfo
- Publication number
- CN114738135A CN114738135A CN202210303455.5A CN202210303455A CN114738135A CN 114738135 A CN114738135 A CN 114738135A CN 202210303455 A CN202210303455 A CN 202210303455A CN 114738135 A CN114738135 A CN 114738135A
- Authority
- CN
- China
- Prior art keywords
- reaction time
- gas flow
- flow reaction
- engine
- working condition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000035484 reaction time Effects 0.000 title claims abstract description 250
- 238000004364 calculation method Methods 0.000 title claims abstract description 82
- 230000001052 transient effect Effects 0.000 claims abstract description 55
- 230000032683 aging Effects 0.000 claims abstract description 47
- 238000012937 correction Methods 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims description 319
- 230000008859 change Effects 0.000 claims description 29
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 25
- 239000001301 oxygen Substances 0.000 claims description 25
- 229910052760 oxygen Inorganic materials 0.000 claims description 25
- 230000003111 delayed effect Effects 0.000 claims description 15
- 230000004044 response Effects 0.000 claims description 15
- 239000000446 fuel Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
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
- F02D41/0002—Controlling intake air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
- F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
-
- 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
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
- F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention provides a method, a device and equipment for calculating gas flow reaction time and a readable storage medium, wherein the method for calculating the gas flow reaction time comprises the following steps: calculating to obtain the gas flow reaction time under the steady-state working condition; calculating to obtain the gas flow reaction time under the transient working condition; if the engine parts are in an aging working condition, obtaining the whole gas flow reaction time through correction calculation; and if the engine parts are not in the aging working condition, summing the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition to obtain the whole gas flow reaction time. According to the method, the whole gas flow reaction time is divided into a steady state working condition and a transient state working condition, whether parts of the engine are in an aging working condition or not is judged, if yes, correction calculation is carried out on the whole gas flow reaction time, and if not, summation calculation is carried out on the two working conditions, so that the calculated whole gas flow reaction time is more accurate.
Description
Technical Field
The invention relates to the field of engine air inlet control, in particular to a method, a device and equipment for calculating gas flow reaction time and a readable storage medium.
Background
The gas flow reaction time is specifically to calculate the flowing time of the gas flow from the throttle valve to the cylinder under different working conditions, the air intake system of the engine transmits the gas of the atmosphere to the cylinder, the bending of the air intake system of the engine is complex, and the running working condition of the engine is instantaneous, so that the gas flow control response of the air intake system of the engine is delayed, the time required by fresh air entering the cylinder through the throttle valve is estimated, the throttle valve is used as a throttle valve body which is closest to the gas flow of the cylinder, so that the throttle valve is an extremely important air flow control actuator of the air intake system, when the gas flow following performance is poor, based on different degrees of errors of the gas flow, in order to accelerate the gas flow following effect and realize accurate output of power, the target position of the throttle valve is required to be controlled according to the gas flow reaction time, so as to realize quick response and stability of the gas flow, the response capability and stability of the gas flow are affected by the too long or too short estimated reaction time, so that the accurate calculation of the gas flow reaction time is particularly important.
In the prior published patent technology, patent application publication No. CN111502846B, "a method for controlling gas circuit torque of engine idling", controls the gas circuit torque of idling based on time constant, and the calculation of gas flow reaction time is not precise.
Disclosure of Invention
The invention mainly aims to provide a method, a device and equipment for calculating gas flow reaction time and a readable storage medium, and aims to solve the technical problem that the calculation of the gas flow reaction time of an air inlet system of an engine at present is not accurate enough.
In a first aspect, the present invention provides a gas flow reaction time calculation method, including:
calculating to obtain the gas flow reaction time under the steady-state working condition;
calculating to obtain the gas flow reaction time under the transient working condition;
judging whether the engine parts are in an aging working condition or not;
if the engine parts are in an aging working condition, the whole gas flow reaction time is obtained through correction calculation based on the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition;
and if the engine parts are not in the aging working condition, summing the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition to obtain the whole gas flow reaction time.
Optionally, the obtaining of the gas flow reaction time under the steady-state condition by calculation includes:
calculating the gas flow reaction time under the steady-state working condition through a first formula, wherein the first formula is as follows:
wherein, tBaseFor the gas flow reaction time under said steady-state operating conditions, VManIs the average gas volume, r, of the intake manifold between the throttle and each cylinderVolEffFor current inflation efficiency, VcylIs the volume of each cylinder, N is the number of engine cylinders, N is the engine speed, rVolEff×VcylXn is the total gas volume entering the cylinder for 2 engine revolutions.
Optionally, the obtaining of the gas flow reaction time under the transient operating condition by calculation includes:
calculating the gas flow reaction time under the transient working condition through a second formula, wherein the second formula is as follows:
wherein, tTransFor the gas flow reaction time under the transient operating conditions, VManThe average gas volume of the intake manifold between the throttle valve and each cylinder,
wherein gamma is the specific heat capacity of air,for the inlet pressure p after the throttleManWith the gas pressure p in front of the throttlepreThrK (n, rho) is a correction factor, dV, determined based on the engine speed n and the density rho of the gas entering the cylinderThrDsrdThe volume flow at the ideal throttle, according to the ideal gas state equation,
wherein p ispreThrIs the gas pressure in front of the throttle valve dmThrThe gas flow before the throttle valve, R is the gas constant, TPortM is the average molar mass of the gas, the gas temperature at the gas inlet.
Optionally, the method for determining the correction coefficient k (n, rho) specifically includes:
detecting whether a pressurization control closed loop is in an activated state;
when the boost control closed loop is not in the active state, k (n, rho) ═ k1(n, rho) wherein k is1(n, rho) is determined from a first relational table of the calibrated number of engine revolutions n and the density rho of the gas entering the cylinder;
when the boost control closed loop is in an active state, k (n, rho) ═ k2(n, rho) wherein k is2(n, rho) is determined from a second table of calibrated engine revolutions n versus cylinder entering gas density rho.
Optionally, the determining whether the engine component is in the aging condition includes:
whether preset conditions are met or not is detected, and the preset conditions comprise:
the water temperature of the engine exceeds the preset water temperature;
the running time of the engine exceeds the preset time;
the target air-fuel ratio is fixed;
the ignition efficiency is kept at an optimum level;
the rotating speed of the engine is kept stable;
completing activation of the oxygen sensor in front of the catalyst;
the running mileage of the engine exceeds the preset mileage;
the accelerator pedal opening change rate exceeds a preset change rate;
and when the conditions are met, judging that the engine parts are in an aging working condition, otherwise, judging that the engine parts are not in the aging working condition.
Optionally, if the engine component is in an aging condition, the obtaining of the overall gas flow reaction time through correction calculation based on the gas flow reaction time under the steady-state condition and the gas flow reaction time under the transient condition includes:
obtaining the reaction time of the change of the oxygen concentration by adjusting the target air-fuel ratio;
if the reaction time of the oxygen concentration change is more than T (z) + delta T and the driving cycle number exceeds the preset driving cycle number, the whole gas flow reaction time of the next driving cycle is corrected and calculated, and the calculation formula is as follows: t ═ T (z) + k (n, rho) × Δ T × d1;
If the reaction time of the oxygen concentration change is not more than T (z) + delta T and the driving cycle number exceeds the preset driving cycle number, the whole gas flow reaction time of the next driving cycle is corrected and calculated, and the calculation formula is as follows: t ═ T (z) + k (n, rho) × Δ T × d2;
Where t is the overall gas flow response time, k (n, rho) is a correction factor determined based on the engine speed n and the gas density rho entering the cylinder, d1For a first predetermined correction factor, d2For the second preset correction coefficient, t (z) is the gas flow reaction time after the last self-learning update, and the gas flow reaction time t (0) updated for the first time is tBase+tTrans,tBaseFor the gas flow reaction time under the steady-state working condition,tTransDelta T is the gas flow reaction time under the transient working condition, is the delay response time and is obtained by the calibration of an engine pedestal,cnt is the delayed ignition frequency of the engine, N is the number of cylinders of the engine, N is the rotating speed of the engine, and the delayed ignition frequency Cnt of the engine is determined according to a relation table of the calibrated rotating speed N of the engine and the density rho of gas entering the cylinders.
In a second aspect, the present invention also provides a gas flow reaction time calculation device, including:
the first calculation module is used for calculating and obtaining the gas flow reaction time under the steady-state working condition;
the second calculation module is used for calculating and obtaining the gas flow reaction time under the transient working condition;
the judging module is used for judging whether the engine parts are in an aging working condition or not;
the third calculation module is used for obtaining the whole gas flow reaction time through correction calculation based on the gas flow reaction time under the steady state working condition and the gas flow reaction time under the transient working condition if the engine parts are under the aging working condition;
and the fourth calculation module is used for summing the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition to obtain the whole gas flow reaction time if the engine parts are not in the aging working condition.
Optionally, the third computing module is configured to:
obtaining the reaction time of the change of the oxygen concentration by adjusting the target air-fuel ratio;
if the reaction time of the oxygen concentration change is more than T (z) + delta T, and the driving cycle number exceeds the preset driving cycle number, the whole gas flow reaction time of the next driving cycle is corrected and calculated, and the calculation formula is as follows: t ═ T (z) + k (n, rho) × Δ T × d1;
If soAnd if the reaction time of the oxygen concentration change is not more than T (z) + delta T and the driving cycle number exceeds the preset driving cycle number, correcting and calculating the whole gas flow reaction time of the next driving cycle, wherein the calculation formula is as follows: t ═ T (z) + k (n, rho) × Δ T × d2;
Where t is the overall gas flow response time, k (n, rho) is a correction factor determined based on the engine speed n and the gas density rho entering the cylinder, d1For a first predetermined correction factor, d2For the second preset correction coefficient, t (z) is the gas flow reaction time after the last self-learning update, and the gas flow reaction time t (0) updated for the first time is tBase+tTrans,tBaseIs the gas flow reaction time under the steady state condition, tTransThe gas flow reaction time under the transient working condition is delta T which is the delay response time and is obtained by the calibration of an engine pedestal,cnt is the delayed ignition frequency of the engine, N is the number of cylinders of the engine, N is the rotating speed of the engine, and the delayed ignition frequency Cnt of the engine is determined according to a relation table of the calibrated rotating speed N of the engine and the density rho of gas entering the cylinders.
In a third aspect, the present invention also provides a gas flow reaction time calculation device, which includes a processor, a memory, and a gas flow reaction time calculation program stored on the memory and executable by the processor, wherein when the gas flow reaction time calculation program is executed by the processor, the steps of the gas flow reaction time calculation method as described above are realized.
In a fourth aspect, the present invention further provides a readable storage medium, on which a gas flow reaction time calculation program is stored, wherein when the gas flow reaction time calculation program is executed by a processor, the steps of the gas flow reaction time calculation method as described above are realized.
In the invention, the gas flow reaction time under the steady-state working condition is obtained by calculation; calculating to obtain the gas flow reaction time under the transient working condition; judging whether the engine parts are in an aging working condition or not; if the engine parts are in an aging working condition, the whole gas flow reaction time is obtained through correction calculation based on the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition; and if the engine parts are not in the aging working condition, summing the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition to obtain the whole gas flow reaction time. According to the invention, the whole gas flow reaction time is divided into the gas flow reaction time under the two working conditions of the steady state and the transient state, whether the engine parts are in the aging working condition is further judged, when the engine parts are in the aging working condition, the whole gas flow reaction time is corrected and calculated based on the gas flow reaction time under the two working conditions of the steady state and the transient state, and when the engine parts are not in the aging working condition, the gas flow reaction time under the steady state working condition and the gas flow reaction time under the transient state working condition are summed to obtain the whole gas flow reaction time, so that the calculated whole gas flow reaction time is more accurate.
Drawings
FIG. 1 is a schematic diagram of a hardware configuration of an embodiment of a gas flow reaction time calculation apparatus according to the present invention;
FIG. 2 is a schematic flow chart illustrating a method for calculating a gas flow reaction time according to an embodiment of the present invention;
FIG. 3 is a functional block diagram of an embodiment of a gas flow response time calculation apparatus according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In a first aspect, an embodiment of the present invention provides a gas flow reaction time calculation apparatus.
Referring to fig. 1, fig. 1 is a schematic diagram of a hardware structure of an embodiment of the gas flow reaction time calculation apparatus of the present invention. In this embodiment of the present invention, the gas flow reaction time calculation device may include a processor 1001 (e.g., a Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used for implementing connection communication among the components; the user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WI-FI interface, WI-FI interface); the memory 1005 may be a Random Access Memory (RAM) or a non-volatile memory (non-volatile memory), such as a magnetic disk memory, and the memory 1005 may optionally be a storage device independent of the processor 1001. Those skilled in the art will appreciate that the hardware configuration depicted in FIG. 1 is not intended to be limiting of the present invention, and may include more or less components than those shown, or some components in combination, or a different arrangement of components.
With continued reference to fig. 1, the memory 1005 of fig. 1, which is one type of computer storage medium, may include an operating system, a network communication module, a user interface module, and a gas flow reaction time calculation program therein. The processor 1001 may call a gas flow reaction time calculation program stored in the memory 1005, and execute the gas flow reaction time calculation method provided by the embodiment of the present invention.
In a second aspect, an embodiment of the present invention provides a method for calculating a gas flow reaction time.
In order to more clearly show the gas flow reaction time calculation method provided in the embodiment of the present application, an application scenario of the gas flow reaction time calculation method provided in the embodiment of the present application is first introduced.
The gas flow reaction time calculation method provided by the embodiment of the application is applied to calculation of gas flow reaction time in an air inlet system of an engine, in order to accelerate a gas flow following effect and realize accurate power output, the target position of a throttle valve needs to be controlled according to the gas flow reaction time, and therefore quick response and stability of gas flow are realized.
In an embodiment, referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of a gas flow reaction time calculation method according to the present invention, as shown in fig. 2, the gas flow reaction time calculation method includes:
and step S10, calculating to obtain the gas flow reaction time under the steady-state working condition.
In this embodiment, the overall gas flow reaction time is divided into two parts, namely, the steady-state working condition and the transient working condition, and the gas flow reaction time under the steady-state working condition is calculated as the gas flow reaction time of the substantially stable and unchangeable part.
And step S20, calculating to obtain the gas flow reaction time under the transient working condition.
In this embodiment, the overall gas flow reaction time is divided into two parts, namely, the steady-state working condition and the transient working condition, and the calculated gas flow reaction time under the transient working condition refers to the gas flow reaction time of the changed part.
And step S30, judging whether the engine parts are in the aging working condition.
In this embodiment, as the engine component ages, a certain influence is exerted on the overall gas flow reaction time, and it is determined whether the engine component is in an aging condition.
And step S40, if the engine parts are in an aging working condition, obtaining the whole gas flow reaction time through correction calculation based on the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition.
In this embodiment, the engine components and parts are in the aging condition, and will cause certain influence to the whole gas flow reaction time, so need to carry out correction calculation to the whole gas flow reaction time to make the calculation of whole gas flow reaction time more accurate.
And step S50, if the engine parts are not in the aging working condition, summing the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition to obtain the whole gas flow reaction time.
In this embodiment, if the parts of the engine are not aged, correction calculation is not required, and the gas flow reaction time under the steady-state condition and the gas flow reaction time under the transient condition are summed to obtain the overall gas flow reaction time.
In this embodiment, the overall gas flow reaction time is divided into two parts, namely a steady-state working condition and a transient working condition, and the part of the gas flow reaction time which changes in a transient state is also concerned besides the basically stable steady-state gas flow reaction time, the gas flow reaction time of the two parts is respectively calculated, further considering that the whole gas flow reaction time can be influenced to a certain extent along with the aging of the parts of the engine, therefore, whether the engine parts are in the aging working condition or not is judged, if yes, the whole gas flow reaction time is corrected and calculated based on the gas flow reaction time under the two working conditions of the steady state and the transient state, and if not, the gas flow reaction time under the steady state working condition and the gas flow reaction time under the transient state working condition are summed and calculated to obtain the whole gas flow reaction time, so that the calculated whole gas flow reaction time is more accurate.
Further, in one embodiment, step S10 includes:
calculating the gas flow reaction time under the steady-state working condition through a first formula, wherein the first formula is as follows:
wherein, tBaseFor the gas flow reaction time under said steady-state operating conditions, VManIs the average gas volume, r, of the intake manifold between the throttle and each cylinderVolEffFor current inflation efficiency, VcylIs the volume of each cylinder, N is the number of engine cylinders, N is the engine speed, rVolEff×VcylXn is the total gas volume entering the cylinder for 2 engine revolutions.
In this embodiment, the gas flow reaction time under the steady-state condition is the substantially stable gas flow reaction time, and the volume of the gas flowing through the gas intake system under this condition is consistent with the volume of the gas entering the cylinder. Each time the engine rotates for 2 circles, all cylinders complete one air intake, so r is providedVolEff×VcylXn is the total gas volume entering the cylinder for 2 engine revolutions,for a gas volume entering the cylinder per 1 revolution of the engine,for the volume of gas entering the cylinder per second, there areThe time required for the gas to enter the cylinder from the throttle valve.
Further, in one embodiment, step S20 includes:
calculating the gas flow reaction time under the transient working condition through a second formula, wherein the second formula is as follows:
wherein, tTransFor the gas flow reaction time under the transient operating conditions, VManThe average gas volume of the intake manifold between the throttle valve and each cylinder,
wherein gamma is the specific heat capacity of air,is a section ofIntake pressure p behind the valveManWith the gas pressure p in front of the throttlepreThrK (n, rho) is a correction coefficient determined based on the engine speed n and the density rho of the gas entering the cylinder, dVThrDsrdThe volume flow at the ideal throttle, according to the ideal gas state equation,
wherein p ispreThrIs the gas pressure in front of the throttle valve dmThrThe gas flow before the throttle valve, R is the gas constant, TPortM is the average molar mass of the gas, the gas temperature at the gas inlet.
In this embodiment, the volume flow at the ideal throttle valve is first calculated according to the ideal gas state equation, then the corrected volume flow at the throttle valve is obtained through correction calculation, and the gas flow reaction time under the transient operating condition is obtained based on the ratio of the average gas volume of the intake manifold between the throttle valve and each cylinder to the corrected volume flow at the throttle valve.
Further, in an embodiment, the determining method of the correction coefficient k (n, rho) in step S20 specifically includes:
detecting whether a pressurization control closed loop is in an activated state;
when the boost control closed loop is not in the active state, k (n, rho) ═ k1(n, rho) wherein k is1(n, rho) is determined from a first relational table of the calibrated number of engine revolutions n and the density rho of the gas entering the cylinder;
when the boost control closed loop is in an active state, k (n, rho) ═ k2(n, rho) wherein k2(n, rho) is determined from a second table of calibrated engine revolutions n versus density of gas entering the cylinder rho.
In the embodiment, experiments show that when the supercharging control closed loop is activated rather than the supercharging control is not activated, the gas reaction time is relatively quick, which is caused by the better gas quantity following effect caused by the supercharging closed loop adjustment, the correction coefficient k (n, rho) of the supercharging control closed loop in the activated and inactivated states is calibrated according to tests to be used for calculating the gas flow reaction time under the transient working condition, the first relation table of the calibrated engine revolution number n and the gas density rho entering the cylinder is shown in table 1, and the table 1 is the first calibration relation table of the engine revolution number n and the gas density rho entering the cylinder.
Table 1.
A second table of the calibrated engine revolution n and the density rho of the gas entering the cylinder is shown in table 2, and table 2 is a second table of the calibrated engine revolution n and the density rho of the gas entering the cylinder.
Table 2.
Further, in one embodiment, step S30 includes:
whether preset conditions are met or not is detected, and the preset conditions comprise:
the water temperature of the engine exceeds the preset water temperature;
the running time of the engine exceeds the preset time;
the target air-fuel ratio is fixed;
the ignition efficiency is kept at an optimum level;
the rotating speed of the engine is kept stable;
completing the activation of the oxygen sensor in front of the catalytic converter;
the running mileage of the engine exceeds the preset mileage;
the accelerator pedal opening change rate exceeds a preset change rate;
and when the conditions are met, judging that the engine parts are in an aging working condition, otherwise, judging that the engine parts are not in the aging working condition.
In the embodiment, the data information of each relevant parameter in the above determination conditions is acquired, and whether the engine component is in the aging working condition is determined, in the embodiment, the preset water temperature is 50 ℃, the preset time is 80S, the ignition efficiency is 1, the determination criterion for keeping the engine rotation speed stable is that the fluctuation range of the engine rotation speed does not exceed ± 10rpm, the preset mileage is set for optimizing the gas flow reaction time in the embodiment, the condition that the running mileage exceeds the preset mileage again after the running mileage is cleared after the preset mileage is reached is included, and the preset change rate is 20%/0.1S in the embodiment.
Further, in one embodiment, step S40 includes:
obtaining the reaction time of the change of the oxygen concentration by adjusting the target air-fuel ratio;
if the reaction time of the oxygen concentration change is more than T (z) + delta T and the driving cycle number exceeds the preset driving cycle number, the whole gas flow reaction time of the next driving cycle is corrected and calculated, and the calculation formula is as follows: t ═ T (z) + k (n, rho) × Δ T × d1;
If the reaction time of the oxygen concentration change is not more than T (z) + delta T and the driving cycle number exceeds the preset driving cycle number, the whole gas flow reaction time of the next driving cycle is corrected and calculated, and the calculation formula is as follows: t ═ T (z) + k (n, rho) ×. DELTA.T × d2;
Where t is the overall gas flow reaction time, k (n, rho) is a correction factor determined based on engine speed n and gas density rho entering the cylinder, d1For a first predetermined correction factor, d2For the second preset correction coefficient, t (z) is the gas flow reaction time after the last self-learning update, and the gas flow reaction time t (0) updated for the first time is tBase+tTrans,tBaseIs the gas flow reaction time under the steady state condition, tTransThe gas flow reaction time under the transient working condition is delta T which is the delay response time and is obtained by the calibration of an engine pedestal,cnt is the delayed ignition frequency of the engine, N is the number of cylinders of the engine, N is the rotating speed of the engine, and the delayed ignition frequency Cnt of the engine is determined according to a relation table of the calibrated rotating speed N of the engine and the density rho of gas entering the cylinders.
In this embodiment, the target air-fuel ratio is adjusted to obtain the reaction time of the change in the oxygen concentration, and the preset driving cycle number takes a value of 100 times. In the embodiment, the whole gas flow reaction time is corrected and calculated according to the aging working condition of the engine parts under two conditions, when the reaction time of oxygen concentration change is greater than T (z) + delta T, a first preset correction coefficient is used for correction and calculation, the value is 1.02, the problem that the whole gas flow reaction time is prolonged due to part aging is solved, when the reaction time of oxygen concentration change is not greater than T (z) + delta T, a second preset correction coefficient is used for correction and calculation, the value is 0.97, and the problem that the whole gas flow reaction time is shortened due to part aging is solved.
In this embodiment, the engine delayed ignition times Cnt refer to table 3 according to a relationship table of the calibrated engine speed n and the gas density rho entering the cylinder, and table 3 is a calibration relationship table of the engine delayed ignition times Cnt, the engine speed n and the gas density rho entering the cylinder.
Table 3.
In a third aspect, an embodiment of the present invention further provides a gas flow reaction time calculation apparatus.
Referring to fig. 3, fig. 3 is a functional module schematic diagram of a gas flow reaction time calculation apparatus according to an embodiment of the present invention.
In this embodiment, the gas flow reaction time calculation device includes:
the first calculation module 10 is used for calculating and obtaining the gas flow reaction time under the steady-state working condition;
the second calculation module 20 is used for calculating and obtaining the gas flow reaction time under the transient working condition;
the judging module 30 is used for judging whether the engine parts are in an aging working condition or not;
the third calculation module 40 is configured to obtain an overall gas flow reaction time through correction calculation based on the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition if the engine component is in the aging working condition;
and the fourth calculation module 50 is configured to sum the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition to obtain an overall gas flow reaction time if the engine component is not in the aging working condition.
Further, in an embodiment, the first calculating module 10 is configured to:
calculating the gas flow reaction time under the steady-state working condition through a first formula, wherein the first formula is as follows:
wherein, tBaseFor the gas flow reaction time under said steady-state operating conditions, VManIs the average gas volume, r, of the intake manifold between the throttle and each cylinderVolEffFor current inflation efficiency, VcylIs the volume of each cylinder, N is the number of engine cylinders, N is the engine speed, rVolEff×VcylXn is the total gas volume entering the cylinder for 2 engine revolutions.
Further, in an embodiment, the second calculating module 20 is configured to:
calculating the gas flow reaction time under the transient working condition through a second formula, wherein the second formula is as follows:
wherein, tTransFor the gas flow reaction time under the transient operating conditions, VManIs a section ofThe average gas volume from the valve to the intake manifold between the respective cylinders,
wherein gamma is the specific heat capacity of air,for the inlet pressure p after the throttleManWith the gas pressure p in front of the throttlepreThrK (n, rho) is a correction coefficient determined based on the engine speed n and the density rho of the gas entering the cylinder, dVThrDsrdThe volume flow at the ideal throttle, according to the ideal gas state equation,
wherein p ispreThrIs the gas pressure in front of the throttle valve dmThrThe gas flow before the throttle valve, R is the gas constant, TPortM is the average molar mass of the gas, the gas temperature at the gas inlet.
Further, in an embodiment, the second calculating module 20 further includes a determining module 201, configured to:
detecting whether a pressurization control closed loop is in an activated state;
when the closed loop of the boost control is not in the active state, k (n, rho) is equal to k1(n, rho) wherein k is1(n, rho) is determined from a first relational table of the calibrated number of engine revolutions n and the density rho of the gas entering the cylinder;
when the boost control closed loop is in an active state, k (n, rho) ═ k2(n, rho) wherein k is2(n, rho) is determined from a second table of calibrated engine revolutions n versus cylinder entering gas density rho.
Further, in an embodiment, the determining module 30 is configured to:
whether preset conditions are met or not is detected, and the preset conditions comprise:
the water temperature of the engine exceeds the preset water temperature;
the running time of the engine exceeds the preset time;
the target air-fuel ratio is fixed and unchanged;
the ignition efficiency is kept at an optimum level;
the rotating speed of the engine is kept stable;
completing activation of the oxygen sensor in front of the catalyst;
the running mileage of the engine exceeds the preset mileage;
the accelerator pedal opening change rate exceeds a preset change rate;
and when the conditions are met, judging that the engine parts are in an aging working condition, otherwise, judging that the engine parts are not in the aging working condition.
Further, in an embodiment, the third calculating module 40 is configured to:
obtaining the reaction time of the change of the oxygen concentration by adjusting the target air-fuel ratio;
if the reaction time of the oxygen concentration change is more than T (z) + delta T and the driving cycle number exceeds the preset driving cycle number, the whole gas flow reaction time of the next driving cycle is corrected and calculated, and the calculation formula is as follows: t ═ T (z) + k (n, rho) × Δ T × d1;
If the reaction time of the oxygen concentration change is not more than T (z) + delta T, and the driving cycle number exceeds the preset driving cycle number, the whole gas flow reaction time of the next driving cycle is corrected and calculated, and the calculation formula is as follows: t ═ T (z) + k (n, rho) × Δ T × d2;
Where t is the overall gas flow reaction time, k (n, rho) is a correction factor determined based on engine speed n and gas density rho entering the cylinder, d1For a first predetermined correction factor, d2For the second preset correction coefficient, t (z) is the gas flow reaction time after the last self-learning update, and the gas flow reaction time t (0) updated for the first time is tBase+tTrans,tBaseIs the gas flow reaction time under the steady state condition, tTransFor gas flow reaction time, Δ T, under said transient conditionsThe time delay response time is obtained by the calibration of an engine pedestal,cnt is the delayed ignition frequency of the engine, N is the number of cylinders of the engine, N is the rotating speed of the engine, and the delayed ignition frequency Cnt of the engine is determined according to a relation table of the calibrated rotating speed N of the engine and the density rho of gas entering the cylinders.
The function implementation of each module in the gas flow reaction time calculation apparatus corresponds to each step in the gas flow reaction time calculation method embodiment, and the function and implementation process thereof are not described in detail here.
In a fourth aspect, the embodiment of the present invention further provides a readable storage medium.
The readable storage medium of the present invention stores a gas flow reaction time calculation program, wherein the gas flow reaction time calculation program, when executed by a processor, implements the steps of the gas flow reaction time calculation method as described above.
The method implemented when the gas flow reaction time calculation program is executed may refer to various embodiments of the gas flow reaction time calculation method of the present invention, and details thereof are not repeated herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for causing a terminal device to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.
Claims (10)
1. A gas flow reaction time calculation method is characterized by comprising the following steps:
calculating to obtain the gas flow reaction time under the steady-state working condition;
calculating to obtain the gas flow reaction time under the transient working condition;
judging whether the engine parts are in an aging working condition or not;
if the engine parts are in an aging working condition, the whole gas flow reaction time is obtained through correction calculation based on the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition;
and if the engine parts are not in the aging working condition, summing the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition to obtain the whole gas flow reaction time.
2. The method of claim 1, wherein the calculating the gas flow reaction time under the steady state condition comprises:
calculating the gas flow reaction time under the steady-state working condition through a first formula, wherein the first formula is as follows:
wherein, tBaseFor the gas flow reaction time, V, under the steady-state operating conditionsManIs the average gas volume, r, of the intake manifold between the throttle and each cylinderVolEffFor current inflation efficiency, VcylIs the volume of each cylinder, N is the number of engine cylinders, N is the engine speed, rVolEff×VcylXn is the total gas volume entering the cylinder for 2 engine revolutions.
3. The method of claim 1, wherein the calculating the gas flow reaction time under the transient operating condition comprises:
calculating the gas flow reaction time under the transient working condition through a second formula, wherein the second formula is as follows:
wherein, tTransFor the gas flow reaction time under the transient operating conditions, VManThe average gas volume of the intake manifold between the throttle valve and each cylinder,
wherein gamma is the specific heat capacity of air,for the inlet pressure p after the throttleManWith the gas pressure p in front of the throttlepreThrK (n, rho) is based on engine speed n and intake airCorrection factor, dV, determined for the gas density rho of the cylinderThrDsrdThe volume flow at the ideal throttle, according to the ideal gas state equation,
wherein p ispreThrIs the gas pressure in front of the throttle valve dmThrThe gas flow rate before the throttle valve, R is the gas constant, TPortM is the average molar mass of the gas, the gas temperature at the gas inlet.
4. The method for calculating gas flow reaction time according to claim 3, wherein the determination method of the correction coefficient k (n, rho) is specifically:
detecting whether a pressurization control closed loop is in an activated state;
when the boost control closed loop is not in the active state, k (n, rho) ═ k1(n, rho) wherein k is1(n, rho) is determined from a first relational table of the calibrated number of engine revolutions n and the density rho of the gas entering the cylinder;
when the boost control closed loop is in an active state, k (n, rho) ═ k2(n, rho) wherein k is2(n, rho) is determined from a second table of calibrated engine revolutions n versus cylinder entering gas density rho.
5. The gas flow reaction time calculation method of claim 1, wherein said determining whether an engine component is in an aging condition comprises:
whether preset conditions are met or not is detected, and the preset conditions comprise:
the water temperature of the engine exceeds the preset water temperature;
the running time of the engine exceeds the preset time;
the target air-fuel ratio is fixed;
the ignition efficiency is kept at an optimum level;
the rotating speed of the engine is kept stable;
completing activation of the oxygen sensor in front of the catalyst;
the running mileage of the engine exceeds the preset mileage;
the accelerator pedal opening change rate exceeds a preset change rate;
and when the conditions are met, judging that the engine parts are in an aging working condition, otherwise, judging that the engine parts are not in the aging working condition.
6. The method for calculating the gas flow reaction time according to claim 1, wherein if the engine component is in an aging condition, obtaining the overall gas flow reaction time by correction calculation based on the gas flow reaction time under the steady-state condition and the gas flow reaction time under the transient condition comprises:
obtaining the reaction time of the change of the oxygen concentration by adjusting the target air-fuel ratio;
if the reaction time of the oxygen concentration change is more than T (z) + delta T and the driving cycle number exceeds the preset driving cycle number, the whole gas flow reaction time of the next driving cycle is corrected and calculated, and the calculation formula is as follows: t ═ T (z) + k (n, rho) × Δ T × d1;
If the reaction time of the oxygen concentration change is not more than T (z) + delta T and the driving cycle number exceeds the preset driving cycle number, the whole gas flow reaction time of the next driving cycle is corrected and calculated, and the calculation formula is as follows: t ═ T (z) + k (n, rho) × Δ T × d2;
Where t is the overall gas flow response time, k (n, rho) is a correction factor determined based on the engine speed n and the gas density rho entering the cylinder, d1For a first predetermined correction factor, d2For the second preset correction coefficient, t (z) is the gas flow reaction time after the last self-learning update, and the gas flow reaction time t (0) updated for the first time is tBase+tTrans,tBaseIs the gas flow reaction time under the steady state condition, tTransThe gas flow reaction time under the transient working condition is delta T which is the delay response time and is obtained by the calibration of an engine pedestal,cnt is the delayed ignition frequency of the engine, N is the number of cylinders of the engine, N is the rotating speed of the engine, and the delayed ignition frequency Cnt of the engine is determined according to a relation table of the calibrated rotating speed N of the engine and the density rho of gas entering the cylinders.
7. A gas flow reaction time calculation device, characterized by comprising:
the first calculation module is used for calculating and obtaining the gas flow reaction time under the steady-state working condition;
the second calculation module is used for calculating the gas flow reaction time under the transient working condition;
the judging module is used for judging whether the engine parts are in an aging working condition or not;
the third calculation module is used for obtaining the whole gas flow reaction time through correction calculation based on the gas flow reaction time under the steady state working condition and the gas flow reaction time under the transient working condition if the engine parts are under the aging working condition;
and the fourth calculation module is used for summing the gas flow reaction time under the steady-state working condition and the gas flow reaction time under the transient working condition to obtain the whole gas flow reaction time if the engine parts are not in the aging working condition.
8. The gas flow reaction time calculation apparatus of claim 7, wherein the third calculation module is to:
obtaining the reaction time of the change of the oxygen concentration by adjusting the target air-fuel ratio;
if the reaction time of the oxygen concentration change is more than T (z) + delta T, and the driving cycle number exceeds the preset driving cycle number, the whole gas flow reaction time of the next driving cycle is corrected and calculated, and the calculation formula is as follows: t ═ T (z) + k (n, rho) × Δ T × d1;
Reaction if the oxygen concentration changesIf the time is not more than T (z) + delta T and the driving cycle number exceeds the preset driving cycle number, the whole gas flow reaction time of the next driving cycle is corrected and calculated, and the calculation formula is as follows: t ═ T (z) + k (n, rho) ×. DELTA.T × d2;
Where t is the overall gas flow response time, k (n, rho) is a correction factor determined based on the engine speed n and the gas density rho entering the cylinder, d1For a first predetermined correction factor, d2For the second preset correction coefficient, t (z) is the gas flow reaction time after the last self-learning update, and the gas flow reaction time t (0) updated for the first time is tBase+tTrans,tBaseIs the gas flow reaction time under the steady state condition, tTransDelta T is the gas flow reaction time under the transient working condition, is the delay response time and is obtained by the calibration of an engine pedestal,cnt is the delayed ignition frequency of the engine, N is the number of cylinders of the engine, N is the rotating speed of the engine, and the delayed ignition frequency Cnt of the engine is determined according to a relation table of the calibrated rotating speed N of the engine and the density rho of gas entering the cylinders.
9. A gas flow reaction time calculation apparatus comprising a processor, a memory, and a gas flow reaction time calculation program stored on the memory and executable by the processor, wherein the gas flow reaction time calculation program when executed by the processor implements the steps of the gas flow reaction time calculation method according to any one of claims 1 to 6.
10. A readable storage medium, characterized in that a gas flow reaction time calculation program is stored thereon, wherein the gas flow reaction time calculation program, when executed by a processor, implements the steps of the gas flow reaction time calculation method according to any one of claims 1 to 6.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210303455.5A CN114738135B (en) | 2022-03-24 | 2022-03-24 | Gas flow reaction time calculation method, device, equipment and readable storage medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210303455.5A CN114738135B (en) | 2022-03-24 | 2022-03-24 | Gas flow reaction time calculation method, device, equipment and readable storage medium |
Publications (2)
Publication Number | Publication Date |
---|---|
CN114738135A true CN114738135A (en) | 2022-07-12 |
CN114738135B CN114738135B (en) | 2023-01-20 |
Family
ID=82276217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210303455.5A Active CN114738135B (en) | 2022-03-24 | 2022-03-24 | Gas flow reaction time calculation method, device, equipment and readable storage medium |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114738135B (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10184438A (en) * | 1996-12-25 | 1998-07-14 | Nissan Motor Co Ltd | Air amount detecting device for engine |
CN1214104A (en) * | 1996-03-15 | 1999-04-14 | 西门子公司 | Process for model-assisted determination of fresh air mass flowing into cylinder of I. C. engine with external exhaust-gas recycling |
JPH11315737A (en) * | 1998-04-30 | 1999-11-16 | Nissan Motor Co Ltd | Engine control unit |
EP1429012A1 (en) * | 2002-12-09 | 2004-06-16 | Ford Global Technologies, Inc. | Method and system for estimation of air charge of an engine |
US20120232772A1 (en) * | 2011-03-07 | 2012-09-13 | Toyota Motor Engineering & Manufacturing North America, Inc. | Adaptive air charge estimation based on support vector regression |
CN103775225A (en) * | 2012-10-25 | 2014-05-07 | 三菱电机株式会社 | Estimation device for cylinder intake air amount in internal combustion engine |
CN111075584A (en) * | 2019-12-31 | 2020-04-28 | 潍柴动力股份有限公司 | Method and device for determining air inflow of engine, storage medium and electronic equipment |
CN112228234A (en) * | 2020-09-29 | 2021-01-15 | 广西玉柴机器股份有限公司 | Transient fuel control method and system of gas engine for power generation |
-
2022
- 2022-03-24 CN CN202210303455.5A patent/CN114738135B/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1214104A (en) * | 1996-03-15 | 1999-04-14 | 西门子公司 | Process for model-assisted determination of fresh air mass flowing into cylinder of I. C. engine with external exhaust-gas recycling |
JPH10184438A (en) * | 1996-12-25 | 1998-07-14 | Nissan Motor Co Ltd | Air amount detecting device for engine |
JPH11315737A (en) * | 1998-04-30 | 1999-11-16 | Nissan Motor Co Ltd | Engine control unit |
EP1429012A1 (en) * | 2002-12-09 | 2004-06-16 | Ford Global Technologies, Inc. | Method and system for estimation of air charge of an engine |
US20120232772A1 (en) * | 2011-03-07 | 2012-09-13 | Toyota Motor Engineering & Manufacturing North America, Inc. | Adaptive air charge estimation based on support vector regression |
CN103775225A (en) * | 2012-10-25 | 2014-05-07 | 三菱电机株式会社 | Estimation device for cylinder intake air amount in internal combustion engine |
CN111075584A (en) * | 2019-12-31 | 2020-04-28 | 潍柴动力股份有限公司 | Method and device for determining air inflow of engine, storage medium and electronic equipment |
CN112228234A (en) * | 2020-09-29 | 2021-01-15 | 广西玉柴机器股份有限公司 | Transient fuel control method and system of gas engine for power generation |
Also Published As
Publication number | Publication date |
---|---|
CN114738135B (en) | 2023-01-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20100211294A1 (en) | Control device for internal combustion engine | |
US6760656B2 (en) | Airflow estimation for engines with displacement on demand | |
US6840215B1 (en) | Engine torque control with desired state estimation | |
US10941717B2 (en) | Throttle controller and throttle controlling method | |
JP5968504B1 (en) | Control device for an internal combustion engine with a supercharger | |
JP2002206456A (en) | Method and system for adapting engine control parameter | |
CN113006952B (en) | Method and device for calculating dynamic delay time of exhaust gas recirculation system | |
CN113107691A (en) | Engine control method, controller and automobile | |
CN101382090A (en) | Air fuel ratio control system for internal combustion engines | |
JP2007113467A (en) | Exhaust emission control device for internal combustion engine | |
CN114738135B (en) | Gas flow reaction time calculation method, device, equipment and readable storage medium | |
JPH1054285A (en) | Degradation judging device for air-fuel ratio sensor | |
JP2008106703A (en) | Control device for internal combustion engine with turbocharger | |
JP2019116871A (en) | Control device for internal combustion engine | |
CN114439629B (en) | Method, device and equipment for adjusting opening degree of supercharger and storage medium | |
JP2006057573A (en) | Intake control device for internal combustion engine | |
US7010413B2 (en) | Cylinder mass air flow prediction model | |
JP2009197720A (en) | Control device for vehicle internal combustion engine | |
JP2615811B2 (en) | Fuel injection amount control device for internal combustion engine | |
CN112780454B (en) | Target compressor ratio and combustion gas ratio generation in diesel engine air boost multivariable control | |
JP2009085114A (en) | Idle speed controlling method of engine equipped with variable valve, and fuel control device equipped with the method | |
JP4025977B2 (en) | Engine intake air amount calculation device | |
JP4123340B2 (en) | Engine intake air amount calculation device | |
JP2002221068A (en) | Torque control device of internal combustion engine | |
CN114704389B (en) | Target intake air density control method, device, equipment and readable storage medium |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |