WO2013005303A1 - 過給機付き内燃機関の制御装置 - Google Patents
過給機付き内燃機関の制御装置 Download PDFInfo
- Publication number
- WO2013005303A1 WO2013005303A1 PCT/JP2011/065372 JP2011065372W WO2013005303A1 WO 2013005303 A1 WO2013005303 A1 WO 2013005303A1 JP 2011065372 W JP2011065372 W JP 2011065372W WO 2013005303 A1 WO2013005303 A1 WO 2013005303A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- torque
- target
- internal combustion
- combustion engine
- throttle
- Prior art date
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D23/00—Controlling engines characterised by their being supercharged
- F02D23/02—Controlling engines characterised by their being supercharged the engines being of fuel-injection type
-
- 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
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0223—Variable control of the intake valves only
- F02D13/0234—Variable control of the intake valves only changing the valve timing only
-
- 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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1433—Introducing closed-loop corrections characterised by the control or regulation method using a model or simulation of the system
- F02D2041/1434—Inverse model
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0402—Engine intake system parameters the parameter being determined by using a model of the engine intake or its components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
- F02D2250/21—Control of the engine output torque during a transition between engine operation modes or states
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a control device for an internal combustion engine with a supercharger having a throttle, and more particularly, to a control device for an internal combustion engine with a supercharger that calculates a target throttle opening using an air inverse model based on a target air amount.
- the air inverse model is an inverse model of an air model, that is, a model of a response of the intake air amount to the operation of the throttle, which is expressed by a mathematical expression.
- the calculation of the target throttle opening using the air inverse model can be applied not only to a naturally aspirated internal combustion engine but also to a control of an internal combustion engine with a supercharger. However, in that case, the following problem peculiar to the internal combustion engine with a supercharger occurs.
- the target throttle opening is calculated so that the current air amount reaches the target air amount at the fastest speed. For this reason, in a situation where the actual torque is insufficient with respect to the required torque, the throttle is opened to the maximum opening so as to increase the air amount quickly.
- the required torque includes the torque requested by the driver through the accelerator pedal operation and the torque requested by the vehicle control device such as ECT (Electronic Controlled Transmission) and TRC (Traction Control System) for vehicle control. It is. For this reason, the temporary decrease in the required torque during acceleration may be caused not only by a temporary return operation of the accelerator pedal but also by a torque down request from the vehicle control device. However, when the difference between the required torque and the current torque is large, the target throttle opening calculated by the air inverse model remains at the maximum opening, and the torque down request from the vehicle control device is not reflected in the throttle opening. there is a possibility.
- the present invention is in a situation where the required torque and the current torque are different due to the supercharging delay of the supercharger. It is an object to improve the controllability of torque. And in order to achieve such a subject, this invention provides the control apparatus of the internal combustion engine with a supercharger as follows.
- the control device receives a requested torque requested by the driver or the vehicle control device to the internal combustion engine, and determines a target torque to be output to the internal combustion engine with reference to the requested torque. Then, a target air amount is calculated from the target torque, and a target throttle opening is calculated using an air inverse model based on the target air amount.
- the control device determines the required torque as the target torque except for a specific situation described later, that is, in a normal situation. This is for calculating a target throttle opening for realizing the required torque at the highest speed.
- the controller will decide. In this case, the present control device determines a value lower than the current torque as the target torque.
- the required torque is used as the target torque as it is, the decrease in the required torque in a region higher than the current torque is not reflected in the throttle opening. .
- the target torque is determined as described above, the torque output from the internal combustion engine can be reduced in accordance with the reduction in the required torque. For this reason, when the decrease in the required torque is due to the driver's accelerator pedal operation, an expected deceleration feeling can be given to the driver. Further, when the decrease in the required torque is due to a torque down request from the vehicle control device, the required vehicle control can be accurately executed.
- the target torque is preferably determined by the following method.
- a target torque decrease amount is determined according to the decrease amount of the request torque.
- a specific calculation method of the target torque reduction amount for example, a ratio between the current torque and the required torque before the reduction is calculated, and a value obtained by correcting the reduction amount of the required torque using the ratio as a correction coefficient is a target torque reduction. It can be an amount. A value obtained by subtracting the target torque reduction amount from the current torque is determined as the target torque.
- the actual reduction amount of the torque output from the internal combustion engine is adjusted according to the reduction amount of the required torque. For this reason, when the decrease in the required torque is due to the driver's accelerator pedal operation, the vehicle can generate a deceleration that matches the driver's expectation. Further, when the decrease in the required torque is due to a torque down request from the vehicle control device, the required vehicle control can be executed more accurately.
- an internal combustion engine with a supercharger is provided with one or more actuators related to the air amount in addition to the throttle.
- actuators related to the air amount in addition to the throttle.
- a variable valve timing device that changes the valve timing
- wastegate valve or a variable nozzle that changes the supercharging pressure
- actuators cooperate with the throttle to adjust the amount of air.
- these actuators are characterized by low air volume responsiveness to their operation when compared to a throttle.
- the present control device determines a target actuator value based on the required torque, and operates the actuator according to the target actuator value.
- the operation based on the target torque determined as described above is performed only for the throttle, and for other actuators that adjust the air amount in cooperation with the throttle, the target torque is not based on the target torque but the target torque itself. Determine the value.
- the actuator According to the operation of the actuator based on the required torque, in a situation where the required torque and the current torque are deviated due to the supercharging delay, the actuator continues to operate in the direction of increasing the air amount even if the required torque is slightly reduced. . According to this, it is possible to prevent a delay in the response of the air amount when the required torque that has once decreased starts to increase again.
- the throttle is more responsive to the amount of air than other actuators, operating the throttle based on the target torque determined as described above allows the amount of air to be quickly adjusted as the required torque decreases. Can be reduced. Furthermore, when the required torque starts to increase again, the amount of air can be quickly increased.
- the present control device determines a target actuator value based on a torque obtained by subtracting the torque required by the vehicle control device from the required torque, and operates the actuator according to the target actuator value.
- the actuator since the torque-down request by the vehicle control device is not reflected in the operation of the actuator, the actuator continues to operate in the direction of increasing the air amount during acceleration. For this reason, as in the case of the first method, it is possible to prevent a delay in the response of the air amount when the required torque once decreased starts increasing again.
- the torque reduction request by the vehicle control device is reflected in the operation of the throttle. Since the throttle has a high responsiveness of the air amount to the operation, the air amount can be quickly reduced according to the torque down request. Furthermore, the amount of air can be quickly increased in accordance with the torque increase request after the torque reduction request.
- the control device is provided with a function of adjusting the torque output from the internal combustion engine to the target torque by retarding the ignition timing from the optimal ignition timing.
- the control device determines a target torque to be output to the internal combustion engine with reference to an operation amount of the accelerator pedal by the driver. Then, a target air amount is calculated from the target torque, and a target throttle opening is calculated using an air inverse model based on the target air amount.
- This control apparatus is based on determining the target torque according to the amount of operation of the accelerator pedal by the driver. That is, in a normal situation excluding a specific situation described later, the target torque is determined according to the operation amount of the accelerator pedal. This is because the target throttle opening for realizing the acceleration request by the driver at the highest speed is calculated.
- the present control device determines the target torque by a method different from usual. In this case, the present control device determines a value lower than the current torque as the target torque.
- the torque output from the internal combustion engine can be reduced in accordance with the accelerator pedal return operation by the driver.
- the driver can achieve a torque reduction required for the internal combustion engine through the operation of the accelerator pedal, and can give the driver a sense of deceleration that is expected.
- a target torque decrease amount is determined according to the return amount of the accelerator pedal, and a value obtained by subtracting the target torque decrease amount from the current torque is determined as the target torque.
- the actual reduction amount of the torque output from the internal combustion engine is adjusted according to the reduction amount of the required torque, so that it is possible to cause the vehicle to generate a deceleration that matches the driver's expectation.
- Embodiment 1 FIG.
- Embodiment 1 of the present invention will be described with reference to the drawings.
- the internal combustion engine to which the control device of the present embodiment is applied is an internal combustion engine with a supercharger for automobiles, more specifically, a spark ignition type 4-cycle reciprocating engine equipped with a turbocharger. More specifically, an electronically controlled throttle (hereinafter simply referred to as throttle), a variable valve timing device (hereinafter referred to as IN-VVT) that changes the valve timing of the intake valve, and a wastegate valve (hereinafter referred to as WGV).
- This control device is realized as one function of an ECU (Electronic control unit) provided in the internal combustion engine. Specifically, the ECU functions as a control device when a program stored in the memory is executed by the CPU. When the ECU functions as a control device, the ECU controls the operation of each actuator including the throttle according to a programmed actuator control logic.
- FIG. 1 is a functional block showing the configuration of a control device realized by the ECU functioning according to the actuator control logic.
- the control device acquires the required torque, and determines the target torque with reference to the required torque.
- the required torque includes a driver required torque calculated from an operation amount of an accelerator pedal by the driver and a device required torque generated from a vehicle control device such as ECT or TRC.
- a method for determining the target torque from the required torque will be described in detail later.
- the present control device calculates the target actuator values of the throttle 2, WGV4, IN-VVT6 and ignition device 8 based on the target torque.
- a method for calculating the target actuator value of each actuator by the control apparatus will be described.
- the actuator value of the throttle 2 is the throttle opening.
- This control device calculates a target throttle opening (denoted as a target TA in the figure) from the target torque using the air amount conversion map 10 and the air inverse model 12.
- the air amount conversion map 10 is based on the various engine state quantities including the engine speed, ignition timing, and air-fuel ratio based on the torque and the in-cylinder intake air amount (or the non-dimensional charging efficiency or load factor). Are associated maps.
- the in-cylinder intake air amount necessary for realizing the target torque based on the current engine state amount is calculated as the target air amount (denoted as target KL in the drawing).
- the air reverse model 12 includes an intake valve reverse model M1, an intake pipe reverse model M2, a throttle reverse model M3, a throttle operation reverse model M4, a throttle operation model M5, a throttle model M6, an intake pipe model M7, and an intake valve model M8. It is configured by combining.
- the throttle model M6, the intake pipe model M7, and the intake valve model M8 constitute a simple air model.
- the intake valve reverse model M1 is an experiment-based model created by examining the relationship between the in-cylinder intake air amount and the intake pipe pressure. According to empirical rules obtained through experiments, in the intake valve inverse model M1, the relationship between the in-cylinder intake air amount and the intake pipe pressure is approximated by a straight line or a broken line. By inputting the target air amount into the intake valve inverse model M1, a target intake pipe pressure (denoted as target Pm in the drawing) for realizing the target air amount is calculated.
- the intake pipe inverse model M2 is a physical model constructed based on a conservation law regarding air in the intake pipe, specifically, an energy conservation law and a flow rate conservation law.
- the intake pipe inverse model M2 includes a pressure difference (denoted as ⁇ Pm in the figure) between the target intake pipe pressure and the current virtual intake pipe pressure (denoted as virtual Pm in the figure), and the current virtual air amount (indicated as ⁇ Pm in the figure).
- ⁇ Pm in the figure the current virtual intake pipe pressure
- the intake pipe inverse model M2 calculates a target throttle passage flow rate (denoted as target mt in the figure) for realizing the target intake pipe pressure based on the input information.
- the throttle inverse model M3 is a model that expresses the relationship between the throttle passage flow rate and the throttle opening by a mathematical expression. Specifically, the throttle model equation expresses the throttle flow rate as a function of the flow path area determined by the throttle opening and the pressure ratio before and after the throttle, and the equation is transformed into the throttle opening equation. It is an equation of an inverse throttle model. The pressure ratio used in this equation may be a measured value or a calculated value by a model. By inputting the target throttle passage flow rate into the throttle inverse model M3, the throttle opening for realizing the target throttle passage flow rate is calculated.
- the throttle operation inverse model M4 is a model that approximates the relationship between the operation of the throttle 2 and the input signal that causes the operation with mathematical formulas or the like. By inputting the throttle opening calculated by the throttle inverse model M3 into the throttle operation inverse model M4, an input signal for realizing it, that is, the target throttle opening is calculated.
- the throttle operation model M5, the throttle model M6, the intake pipe model M7 and the intake valve model M8 are provided for calculating the virtual intake pipe pressure and the virtual air amount used in the above calculation process.
- the throttle operation model M5 is a forward model corresponding to the throttle operation inverse model M4 described above. By inputting the target throttle opening to the throttle operation model M5, the virtual actual throttle opening at the present time is calculated.
- the throttle model M6 is a forward model corresponding to the throttle inverse model M3 described above, and calculates the current virtual throttle passage flow rate (denoted as virtual mt in the figure) by inputting the virtual throttle opening.
- the intake pipe model M7 is a forward model corresponding to the above-described intake pipe inverse model M2, and calculates a virtual intake pipe pressure by inputting a virtual throttle passage flow rate.
- the intake valve model M8 is a forward model corresponding to the above-described intake valve inverse model M1, and calculates a virtual air amount by inputting a virtual intake pipe pressure.
- the virtual intake pipe pressure is used to calculate the pressure difference ( ⁇ Pm), and the virtual air amount is input to the intake pipe inverse model M2 together with the pressure difference.
- This control device operates the throttle 2 according to the target throttle opening calculated by the air inverse model 12 described above.
- the opening of the throttle 2 actually realized by the operation is measured by a throttle opening sensor (not shown).
- the actuator value of WGV4 is the duty of the solenoid that opens and closes WGV4.
- the present control device calculates a target duty of WGV 4 (represented as a target WGV duty in the figure) from the target intake pipe pressure using the boost pressure calculation map 14 and the duty calculation map 16.
- the supercharging pressure calculation map 14 is a map in which the intake pipe pressure and the supercharging pressure necessary to realize the supercharging pressure are associated with various engine state quantities as keys.
- the present control device calculates the target boost pressure using the boost pressure calculation map 14 based on the target intake pipe pressure.
- the duty calculation map 16 is a map in which a supercharging pressure and a duty necessary for realizing the supercharging pressure are associated with various engine state quantities as keys.
- the present control device calculates the target WGV duty using the duty calculation map 16 based on the target boost pressure, and operates the WGV 4 according to the target WGV duty.
- the actuator value of IN-VVT6 is the displacement angle of IN-VVT6.
- This control device calculates a target displacement angle of IN-VVT 6 (indicated as a target VVT displacement angle in the drawing) from the target air amount using the VVT inverse model 18.
- the VVT inverse model 18 is an inverse model of the VVT model in which the response characteristic of the air amount with respect to the displacement angle of the IN-VVT 6 is modeled. According to the VVT inverse model 18, the displacement angle for realizing the target air amount at the highest speed is calculated as the target displacement angle.
- the present control device operates the IN-VVT 6 according to the target displacement angle calculated using the VVT inverse model 18.
- the actuator value of the ignition device 8 is a retard amount with respect to the ignition timing, specifically, the optimum ignition timing (ignition timing on the more retarded side of the MBT and the trace knock ignition timing) determined from the engine state.
- This control device controls the torque by using both the air amount control by the cooperation of the throttle 2, the WGV 4 and the IN-VVT 6 and the ignition timing control by the ignition device 8.
- torque control based on the air amount is the main control, and torque control based on the ignition timing is performed for the purpose of interpolating the torque control based on the air amount.
- the ignition timing is basically set to the optimum ignition timing, and the ignition timing is retarded only when the actual torque is excessive with respect to the target torque by only the torque control based on the air amount.
- the control device calculates the target ignition timing using the ignition timing calculation unit 20.
- an engine state quantity indicating the current engine state is input to the ignition timing calculation unit 20.
- the ignition timing calculation unit 20 calculates an estimated torque obtained if the ignition timing is set to the optimal ignition timing based on these engine state quantities.
- the ignition timing calculation unit 20 calculates the optimal ignition timing as the target ignition timing.
- the ignition timing calculation unit 20 determines the retard amount of the ignition timing necessary for realizing the target torque based on the difference or ratio between the estimated torque and the target torque. Then, the ignition timing retarded by the retard amount from the optimal ignition timing is calculated as the target ignition timing.
- the present control device operates the ignition device 8 in accordance with the target ignition timing calculated by the ignition timing calculation unit 20.
- the present control device uses the target torque, not the required torque, as the base information for calculating the target actuator value of each actuator.
- the target torque is determined with reference to the required torque as described above.
- the present control device includes a target torque determination unit 24 and a current torque calculation unit 26 as elements for determining the target torque from the required torque.
- the current torque calculation unit 26 is an element that calculates the current torque output from the internal combustion engine.
- the current torque calculation unit 26 receives engine state quantities indicating the current engine state such as the engine speed, the current air amount (current KL), and the target air-fuel ratio (target A / F). These engine state quantities may be measured values by sensors or calculated values.
- the current torque calculation unit 26 calculates the current torque output from the internal combustion engine using these engine state quantities.
- the target torque determination unit 24 receives the requested torque and the current torque calculated by the current torque calculation unit 26. Calculation of the required torque is performed by a powertrain manager (not shown).
- the powertrain manager is a control device that performs integrated control of the entire vehicle, and is implemented as a function of the ECU, similar to the control device.
- the calculation of the required torque by the powertrain manager and the calculation of the current torque by the present control device are performed at a certain time step corresponding to the calculation cycle of the ECU.
- the target torque determination unit 24 determines a target torque based on the input requested torque and the current torque.
- FIG. 2 is a flowchart showing a target torque determination method by the target torque determination unit 24.
- the function of the target torque determination unit 24 will be described with reference to the flowchart of FIG.
- the target torque determination unit 24 first performs the determination in step S1.
- the target torque determination unit 24 calculates the difference between the required torque and the current torque, and determines whether the difference is greater than a predetermined threshold value.
- the throttle 2 is an actuator that has a higher response of the air amount to the operation than the WGV 4 or the like, but a slight response delay occurs between the target air amount and the actual air amount. For this reason, the temporary difference between the required torque and the current torque is a phenomenon that occurs not only in a supercharged internal combustion engine but also in a naturally aspirated internal combustion engine.
- the threshold value used in the determination in step S1 is set to a level at which a deviation between the required torque and the current torque accompanying supercharging delay can be detected.
- the target torque determination unit 24 When the difference between the required torque and the current torque exceeds the threshold value, the target torque determination unit 24 next performs the determination in step S2.
- the target torque determination unit 24 determines whether or not the decrease amount of the required torque, specifically, the decrease amount of the current value with respect to the previous value of the request torque is greater than a predetermined threshold value.
- the threshold value used in the determination in step S2 is set to a level at which a torque down request from a driver or the like and a noise component included in the required torque can be distinguished.
- the target torque determination unit 24 executes the process of step S4 as the process for determining the target torque when the determination result of step S1 is negative. Moreover, although the determination result of step S1 is affirmative, the process of step S4 is also performed when the determination result of step S2 is negative.
- the target torque determination unit 24 determines the current value of the required torque (denoted as TRQrq (k) in the drawing) as the current value of the target torque (denoted as TRQtg (k) in the drawing). .
- the target torque determination unit 24 performs the process of step S5. In step S5, the current value of the required torque is stored as the previous value.
- step S3 the target torque determination unit 24 determines a target torque decrease amount according to the decrease amount of the required torque, and determines a value lower than the current torque by the target torque decrease amount as the target torque.
- the target torque is determined as follows. First, the target torque determination unit 24 calculates a decrease amount of the current value with respect to the previous value of the required torque (denoted as ⁇ TRQ in the drawing).
- a ratio between the previous value of the current torque (denoted as TRQcr (k-1) in the figure) and the previous value of the required torque (denoted as TRQrq (k-1) in the figure) is calculated.
- the target torque reduction amount is calculated by correcting the reduction amount of the required torque using the ratio as a correction coefficient.
- the target torque determination unit 24 determines a value obtained by subtracting the target torque decrease amount from the previous value of the required torque as the current value of the target torque (denoted as TRQtg (k) in the drawing). After the target torque is determined, the target torque determination unit 24 performs the process of step S5.
- the required torque is determined as it is as the target torque so that the target throttle opening for realizing the required torque at the highest speed is calculated.
- the necessary torque reduction amount can be obtained.
- a target torque is calculated based on the current torque.
- FIG. 3 is a diagram showing a specific example of target torque calculation by the above method.
- the required torque of the last time is 100 Nm
- the current torque is 80 Nm.
- the required torque has increased to 110 Nm at the time of the previous calculation, and the current torque has increased to 88 Nm. Then, in this situation where the required torque and the current torque are both increasing while deviating from each other, the required torque has been reduced to 95 Nm this time.
- the target torque is determined by the normal method according to the processing of step S4 until the previous calculation time. That is, the previous target torque is determined to be 100 Nm, and the previous target torque is determined to be 110 Nm. However, for the current time when the required torque has decreased, the target torque is calculated according to the processing of step S3. According to the calculation formula used in step S3, the reduction amount of the required torque is 15 Nm, and the ratio between the previous value of the current torque and the previous value of the required torque is 0.8. Is 12 Nm obtained by multiplying 15 Nm by the correction coefficient of 0.8. Then, 76Nm obtained by subtracting 12Nm of the target torque reduction amount from 88Nm, which is the previous value of the current torque, is determined as the current value of the target torque.
- the current torque at the time of acceleration is the maximum torque that the internal combustion engine can generate at the present time
- the required torque is used as the target torque as it is, the decrease in the required torque in a region higher than the current torque is not reflected in the throttle opening.
- the current value of the target torque is determined based on the previous value of the current torque as described above, the torque output from the internal combustion engine can be reduced in accordance with the reduction of the required torque.
- the current torque can be reduced from the previous value of 88 Nm to the current value of 76 Nm.
- the current torque decreases as the required torque decreases.
- the target torque is calculated so that the amount of decrease also increases.
- FIG. 4 is a time chart showing an operation image at the time of acceleration of the internal combustion engine with a supercharger controlled by the present control device compared with an operation image according to a comparative example.
- a device that uses the required torque as it is as the target torque that is, a device that excludes the target torque determination unit 24 and the current torque calculation unit 26 from the configuration shown in FIG. 1 is used.
- FIG. 4 shows the control result when the accelerator pedal is temporarily returned to a small extent after the accelerator pedal is fully depressed.
- the time change of the opening degree of the accelerator pedal is shown.
- the change over time of the target torque by the present control device is shown by a solid line
- the change over time of the target torque by the comparative example that is, the required torque is shown by a dotted line.
- the time change of the actual torque by the present control device is indicated by a solid line
- the time change of the actual torque by the comparative example is indicated by a dotted line.
- the time change of the throttle opening by the present control device is shown by a solid line
- the time change of the throttle opening by the comparative example is shown by a dotted line.
- the time variation of the in-cylinder intake air amount by the present control device is indicated by a solid line
- the time change of the in-cylinder intake air amount by the comparative example is indicated by a dotted line.
- the time change of the throttle upstream pressure by the present control device is indicated by a solid line
- the time change of the throttle upstream pressure by the comparative example is indicated by a dotted line.
- the required torque calculated from the opening of the accelerator pedal is used as the target torque as it is, and the throttle is operated according to the target torque that is the required torque itself.
- the accelerator pedal is depressed, the air amount rises rapidly for a moment by opening the throttle to the maximum opening.
- the increase rate of the air amount becomes slow due to the supercharging delay, that is, the increase in the throttle upstream pressure.
- the maximum throttle opening is calculated as the target throttle opening so that the current torque reaches the target torque at the maximum speed.
- the target torque which is the required torque itself, decreases by an amount corresponding to the return amount of the accelerator pedal.
- the amount of air continues to increase monotonically without decreasing, and the torque output by the internal combustion engine continues to increase monotonously accordingly. That is, according to the comparative example, the accelerator pedal return operation by the driver is not reflected in the throttle operation, and as a result, is not reflected in the torque output from the internal combustion engine.
- the required torque calculated from the accelerator pedal opening is set as the target torque as it is, and the throttle is operated according to the target torque.
- the current torque that is, the maximum torque that the internal combustion engine can output at the current time
- the target torque is determined based on the above.
- the target torque determined here is set to a value lower than the current torque by the target torque reduction amount determined according to the reduction amount of the required torque.
- the target throttle opening is changed from the maximum opening to the opening corresponding to the target torque so as to lower the current torque to a lower target torque. It is made smaller.
- the throttle is temporarily operated to the closing side, whereby the amount of air temporarily decreases, so that the torque output from the internal combustion engine also temporarily decreases. That is, according to this control apparatus, the return operation of the accelerator pedal by the driver can be reflected in the operation of the throttle, and in turn can be reflected in the torque output from the internal combustion engine.
- the reason why the rise of the throttle upstream pressure is slightly slower in the present control device than in the comparative example is that the throttle is temporarily closed as described above.
- the air amount is once reduced in this control device, the state where the target torque and the current torque deviate from each other lasts slightly longer than in the comparative example, and accordingly, the throttle opening sticks to the maximum opening. The time spent is getting longer.
- Embodiment 2 of the present invention will be described with reference to the drawings.
- FIG. 5 is a functional block diagram showing the configuration of the control device according to the second embodiment of the present invention.
- the present control device corresponds to a partly modified configuration of the control device of the first embodiment.
- elements that are common in function to the control apparatus of the first embodiment are denoted by the same reference numerals in the drawing.
- description of functions common to the first embodiment will be omitted or simplified, and the configuration of the present control device will be described focusing on functions different from the first embodiment.
- the difference of the present control device from the control device of the first embodiment is in the torque values used for determining the target actuator values of WGV4 and IN-VVT6.
- the present control device determines the target actuator values of WGV4 and IN-VVT6 based on the required torque, not the target torque determined by the target torque determination unit 24.
- the target throttle opening is determined based on the target torque determined by the target torque determination unit 24 as in the control device of the first embodiment.
- the present control device is provided with an air amount conversion map 30 for converting the required torque into the air amount separately from the air amount conversion map 10.
- the air amount conversion map 30 the in-cylinder intake air amount necessary for realizing the required torque under the current engine state amount is calculated as the target air amount (denoted as target KL2 in the drawing).
- the target air amount converted from the required torque is input to the VVT inverse model 18, and the target displacement angle of IN-VVT 6 is calculated based on the target air amount.
- the present control device further includes an intake valve reverse model 32 having the same contents as the intake valve reverse model M1 of the air reverse model 12.
- the target air amount converted from the required torque by the air amount conversion map 30 is input to the intake valve inverse model 32.
- the target intake pipe pressure (denoted as target Pm2 in the figure) calculated by the intake valve inverse model 32 is converted into the target boost pressure using the boost pressure calculation map 14, and further the duty calculation map 16 is used. Is converted into the target WGV duty of WGV4.
- FIG. 6 is a time chart showing an operation image during acceleration of the internal combustion engine with a supercharger controlled by the present control device.
- the time chart of FIG. 6 corresponds to the time chart of FIG. 4 in which a chart showing the change over time of the displacement angle of the IN-VVT 6 and the chart showing the change over time of the opening of the WGV 4 by this control apparatus are added.
- WGV4 and IN-VVT6 are actuators that adjust the air volume in cooperation with the throttle 2. However, these are less responsive to the amount of air in operation than the throttle 2. For this reason, when the WGV4 or IN-VVT6 is operated to reduce the air amount in response to a torque reduction request during acceleration, the response to the air amount is slightly increased when the reduced required torque once again increases. Will be delayed. However, according to the present control device, in a situation where the required torque and the current torque are different due to the supercharging delay, it is assumed that the required torque is reduced by the torque down request as shown in the respective charts of WGV4 and IN-VVT6. However, WGV4 and IN-VVT6 continue to operate in the direction of increasing the air amount.
- Embodiment 3 FIG. Next, Embodiment 3 of the present invention will be described with reference to the drawings.
- FIG. 7 is a functional block diagram showing the configuration of the control device according to the third embodiment of the present invention.
- This control device corresponds to a partly modified configuration of the control device of the second embodiment.
- elements that are common in function to the control apparatus of the second embodiment are denoted by the same reference numerals in the drawing.
- description of functions common to the second embodiment will be omitted or simplified, and the configuration of the present control device will be described focusing on functions different from the second embodiment.
- the difference of the present control device from the control device in the second embodiment is in the torque values used for determining the target actuator values of WGV4 and IN-VVT6.
- the present control device determines the target actuator values of WGV4 and IN-VVT6 not based on the required torque but only on the driver required torque included in the required torque, that is, the required torque calculated from the accelerator pedal opening.
- the target torque is determined by the target torque determination unit 24 with reference to the request torque including not only the driver request torque but also the request torque of the vehicle control device such as ECT, A target throttle opening is determined based on the target torque.
- the driver required torque is converted into a target air amount (indicated as target KL2 in the figure) by the air amount conversion map 30. Then, the target air amount converted from the driver request torque is input to the VVT inverse model 18, and the target displacement angle of IN-VVT 6 is calculated based on the target air amount.
- the target air amount converted from the driver request torque by the air amount conversion map 30 is input to the intake valve inverse model 32. Then, the target intake pipe pressure (denoted as target Pm2 in the figure) calculated by the intake valve inverse model 32 is converted into the target boost pressure using the boost pressure calculation map 14, and further the duty calculation map 16 is used. Is converted into the target WGV duty of WGV4.
- the torque reduction request by the vehicle control device such as ECT is not reflected in the operation of the WGV4 or IN-VVT6, and the torque reduction by the vehicle control device is performed.
- the request is reflected only in the operation of the throttle 2.
- the WGV 4 and the IN-VVT 6 are not operated unnecessarily, and it is possible to prevent a delay in the response of the air amount when the requested torque once decreased due to the torque reduction request is increased again. it can.
- WGV and IN-VVT are not essential for the first embodiment.
- the control device of the first embodiment can also be applied to an internal combustion engine with a supercharger that does not have WGV or IN-VVT but has only a throttle.
- WGV and IN-VVT are exemplified as actuators that adjust the air amount in cooperation with the throttle.
- a variable valve timing device for a turbocharger with a variable nozzle or an exhaust valve is used. May be considered to be included in such an actuator.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
以下、本発明の実施の形態1について図を用いて説明する。
次に、本発明の実施の形態2について図を用いて説明する。
次に、本発明の実施の形態3について図を用いて説明する。
以上、本発明の実施の形態について説明したが、本発明は上述の実施の形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲で種々変形して実施することができる。例えば、実施の形態1に関してはWGVやIN-VVTは必須ではない。実施の形態1の制御装置は、WGVやIN-VVTを有さずスロットルのみを有する過給機付き内燃機関にも応用することができる。また、上述の実施の形態ではスロットルと協働して空気量を調整するアクチュエータとしてWGVとIN-VVTを例に挙げたが、可変ノズル付きのターボ過給機や排気バルブ用の可変バルブタイミング装置もそのようなアクチュエータに含まれると考えてよい。
4 ウエストゲートバルブ
6 可変バルブタイミング装置
8 点火装置
10 空気量変換マップ
12 エア逆モデル
14 過給圧算出マップ
16 デューティ算出マップ
18 VVT逆モデル
20 点火時期算出部
24 目標トルク決定部
26 現在トルク算出部
M1 吸気弁逆モデル
M2 吸気管逆モデル
M3 スロットル逆モデル
M4 スロットル動作逆モデル
M5 スロットル動作モデル
M6 スロットルモデル
M7 吸気管モデル
M8 吸気弁モデル
Claims (8)
- スロットルを有する過給機付き内燃機関の制御装置において、
目標トルクから目標空気量を計算する手段と、
前記目標空気量に基づきエア逆モデルを用いて目標スロットル開度を計算する手段と、
前記目標スロットル開度に従って前記スロットルを操作する手段と、
前記内燃機関に対する要求トルクを取得する手段と、
前記内燃機関が出力している現在トルクを計算する手段と、
前記要求トルクと前記現在トルクとが乖離していない場合は前記要求トルクを前記目標トルクとして決定するが、前記要求トルクと前記現在トルクとが乖離している状況で前記要求トルクに減少方向の変化が生じた場合は、前記現在トルクよりも低い値を前記目標トルクとして決定する目標トルク決定手段と、
を備えることを特徴とする過給機付き内燃機関の制御装置。 - 前記目標トルク決定手段は、前記要求トルクと前記現在トルクとが乖離している状況で前記要求トルクに減少方向の変化が生じた場合、前記要求トルクの減少量に応じて目標とするトルク減少量を決定し、前記現在トルクから前記目標トルク減少量を差し引いた値を前記目標トルクとして決定することを特徴とする請求項1に記載の過給機付き内燃機関の制御装置。
- 前記目標トルク決定手段は、前記要求トルクの減少量を前記現在トルクと減少前の前記要求トルクとの比によって補正した値を前記目標トルク減少量として決定することを特徴とする請求項2に記載の過給機付き内燃機関の制御装置。
- 前記内燃機関は、前記スロットルと協働して空気量を調整するアクチュエータであって前記スロットルに比較して動作に対する空気量の応答性が低いアクチュエータを有し、
前記制御装置は、
前記要求トルクに基づいて目標アクチュエータ値を決定する手段と、
前記目標アクチュエータ値に従って前記アクチュエータを操作する手段と、
を備えることを特徴とする請求項1乃至3の何れか1項に記載の過給機付き内燃機関の制御装置。 - 前記内燃機関は、前記スロットルと協働して空気量を調整するアクチュエータであって前記スロットルに比較して動作に対する空気量の応答性が低いアクチュエータを有し、
前記制御装置は、
前記要求トルクから車両制御デバイスが要求するトルクを除いたトルクに基づいて目標アクチュエータ値を決定する手段と、
前記目標アクチュエータ値に従って前記アクチュエータを操作する手段と、
を備えることを特徴とする請求項1乃至3の何れか1項に記載の過給機付き内燃機関の制御装置。 - 前記スロットルを前記目標スロットル開度に従い操作することで得られる空気量が前記目標トルクの実現のために必要な空気量に対して過剰になる場合に、点火時期を最適点火時期よりも遅角することによって前記内燃機関が出力するトルクを前記目標トルクに調整する手段をさらに備えることを特徴とする請求項1乃至5の何れか1項に記載の過給機付き内燃機関の制御装置。
- スロットルを備える過給機付き内燃機関の制御装置において、
目標トルクから目標空気量を計算する手段と、
前記目標空気量に基づきエア逆モデルを用いて目標スロットル開度を計算する手段と、
前記目標スロットル開度に従って前記スロットルを操作する手段と、
ドライバによるアクセルペダルの操作量を取得する手段と、
前記内燃機関が出力している現在トルクを計算する手段と、
ドライバによる前記アクセルペダルの操作量に応じて前記目標トルクを決定することを基本とするが、ドライバにより前記アクセルペダルが踏み込まれ、それに伴う加速の途中で前記アクセルペダルが戻された場合は、前記現在トルクよりも低い値を前記目標トルクとして決定する目標トルク決定手段と、
を備えることを特徴とする過給機付き内燃機関の制御装置。 - 前記目標トルク決定手段は、ドライバにより前記アクセルペダルが踏み込まれ、それに伴う加速の途中で前記アクセルペダルが戻された場合、前記アクセルペダルの戻し量に応じて目標とするトルク減少量を決定し、前記現在トルクから前記目標トルク減少量を差し引いた値を前記目標トルクとして決定することを特徴とする請求項7に記載の過給機付き内燃機関の制御装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2011/065372 WO2013005303A1 (ja) | 2011-07-05 | 2011-07-05 | 過給機付き内燃機関の制御装置 |
US14/122,471 US20140224227A1 (en) | 2011-07-05 | 2011-07-05 | Control unit of internal combustion engine equipped with supercharger |
DE112011105409.2T DE112011105409T5 (de) | 2011-07-05 | 2011-07-05 | Steuereinheit für eine mit einem Aufladegerät ausgerüstete Brennkraftmaschine |
CN201180071658.6A CN103620200A (zh) | 2011-07-05 | 2011-07-05 | 带增压器内燃机的控制装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2011/065372 WO2013005303A1 (ja) | 2011-07-05 | 2011-07-05 | 過給機付き内燃機関の制御装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013005303A1 true WO2013005303A1 (ja) | 2013-01-10 |
Family
ID=47436676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/065372 WO2013005303A1 (ja) | 2011-07-05 | 2011-07-05 | 過給機付き内燃機関の制御装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20140224227A1 (ja) |
CN (1) | CN103620200A (ja) |
DE (1) | DE112011105409T5 (ja) |
WO (1) | WO2013005303A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016098824A (ja) * | 2014-11-18 | 2016-05-30 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングRobert Bosch Gmbh | 内燃機関の弁制御時間を調整する方法 |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103732878A (zh) * | 2011-08-23 | 2014-04-16 | 丰田自动车株式会社 | 带涡轮增压器的内燃机的控制装置 |
JP5935817B2 (ja) * | 2014-01-17 | 2016-06-15 | 株式会社デンソー | 内燃機関の過給制御装置 |
JP6156429B2 (ja) * | 2014-05-26 | 2017-07-05 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
CN105201639B (zh) * | 2014-06-30 | 2019-01-11 | 日立汽车系统株式会社 | 内燃机的控制装置以及控制方法 |
KR20170041321A (ko) * | 2015-10-06 | 2017-04-17 | 현대자동차주식회사 | 수퍼차저의 제어방법 |
JP6296425B2 (ja) * | 2016-02-15 | 2018-03-20 | マツダ株式会社 | ターボ過給機付きエンジンの制御装置 |
US10233855B2 (en) * | 2016-04-15 | 2019-03-19 | Toyota Jidosha Kabushiki Kaisha | Failure diagnosis apparatus for diagnosing an insufficient output of an internal combustion engine |
JP6923005B2 (ja) * | 2018-01-23 | 2021-08-18 | 日産自動車株式会社 | 内燃機関の制御方法及び内燃機関の制御装置 |
CN111720204B (zh) * | 2019-03-21 | 2021-08-17 | 上海汽车集团股份有限公司 | 一种发动机的控制方法及其装置 |
CN113464291B (zh) * | 2021-06-30 | 2022-10-04 | 东风汽车集团股份有限公司 | 一种串联模式燃烧判断的方法及使用该方法的混动汽车 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11351030A (ja) * | 1998-06-11 | 1999-12-21 | Fuji Heavy Ind Ltd | 過給機付き内燃機関 |
JP2002327643A (ja) * | 2001-02-28 | 2002-11-15 | Denso Corp | ディーゼルエンジンの制御装置 |
JP2010174696A (ja) * | 2009-01-28 | 2010-08-12 | Toyota Motor Corp | 内燃機関の制御装置 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004060555A (ja) * | 2002-07-30 | 2004-02-26 | Keihin Corp | 内燃エンジンの始動時空気量制御装置 |
-
2011
- 2011-07-05 US US14/122,471 patent/US20140224227A1/en not_active Abandoned
- 2011-07-05 WO PCT/JP2011/065372 patent/WO2013005303A1/ja active Application Filing
- 2011-07-05 CN CN201180071658.6A patent/CN103620200A/zh active Pending
- 2011-07-05 DE DE112011105409.2T patent/DE112011105409T5/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11351030A (ja) * | 1998-06-11 | 1999-12-21 | Fuji Heavy Ind Ltd | 過給機付き内燃機関 |
JP2002327643A (ja) * | 2001-02-28 | 2002-11-15 | Denso Corp | ディーゼルエンジンの制御装置 |
JP2010174696A (ja) * | 2009-01-28 | 2010-08-12 | Toyota Motor Corp | 内燃機関の制御装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016098824A (ja) * | 2014-11-18 | 2016-05-30 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングRobert Bosch Gmbh | 内燃機関の弁制御時間を調整する方法 |
Also Published As
Publication number | Publication date |
---|---|
CN103620200A (zh) | 2014-03-05 |
US20140224227A1 (en) | 2014-08-14 |
DE112011105409T5 (de) | 2014-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2013005303A1 (ja) | 過給機付き内燃機関の制御装置 | |
JP4464924B2 (ja) | エンジンの制御装置および制御方法 | |
JP5195064B2 (ja) | 内燃機関の制御装置 | |
JP2009019504A (ja) | エンジンの制御方法並びに制御装置 | |
WO2011135681A1 (ja) | 内燃機関の制御装置 | |
JP2009133276A (ja) | 内燃機関の制御装置 | |
WO2014010067A1 (ja) | ターボ過給機付き内燃機関の制御装置 | |
JP5263455B2 (ja) | 過給機付き内燃機関の制御装置 | |
JP4816813B2 (ja) | 内燃機関の制御装置 | |
JP5273295B2 (ja) | 内燃機関の制御装置 | |
CN108571389B (zh) | 内燃机的控制装置 | |
JP5472537B2 (ja) | 過給機付き内燃機関の制御装置 | |
JP6511102B2 (ja) | 内燃機関の制御装置 | |
JP2016205282A (ja) | 車両統合制御装置 | |
JP4609279B2 (ja) | 内燃機関の制御装置 | |
JP5920176B2 (ja) | 内燃機関の制御装置 | |
JP5598374B2 (ja) | エンジンの制御装置 | |
JP5664463B2 (ja) | 内燃機関の制御装置 | |
JP2004360562A (ja) | 内燃機関の制御装置 | |
JPWO2013005303A1 (ja) | 過給機付き内燃機関の制御装置 | |
JP5751344B2 (ja) | 内燃機関の制御装置 | |
JP5472165B2 (ja) | エンジンの制御装置 | |
JP5376171B2 (ja) | 車両の出力制御装置 | |
JP2009228481A (ja) | エンジンの制御装置 | |
JP5085597B2 (ja) | エンジンの制御装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11868911 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2013522641 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1120111054092 Country of ref document: DE Ref document number: 112011105409 Country of ref document: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14122471 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11868911 Country of ref document: EP Kind code of ref document: A1 |