JP2010090865A - Internal combustion engine device, vehicle and execution method for valve inspection - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To execute the inspection of an EGR (exhaust gas recirculation) valve more properly. <P>SOLUTION: When an idle learning history is stored in a RAM, a throttle motor is controlled and the inspection of the EGR valve is executed so that the opening of the throttle valve becomes an opening THidle obtained through idle learning (steps S100-S120). When the idle learning history is not stored in the RAM, the throttle motor is controlled so that the opening of the throttle valve becomes an initial opening THinit which is larger than an opening estimated to be obtained through the idle learning without executing the inspection of the EGR valve (steps S100, S130). Thus, it is possible to avoid inconvenience caused by execution of the inspection of the EGR valve while the learning of an idle control quantity is not completed and the inspection of the valve can be executed more properly as the inspection of the valve is executed after the learning of the idle control quantity is completed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an internal combustion engine device, a vehicle, and a valve inspection execution method.

Conventionally, in this type of internal combustion engine device, when the engine is idling, the amount of air flowing by bypassing the throttle valve is adjusted by an idle speed control valve (hereinafter referred to as ISC valve) and a part of the exhaust gas is taken into the intake side. An exhaust gas recirculation (exhaust gas recirculation, hereinafter referred to as EGR) that adjusts the flow rate of exhaust gas to be recirculated to the intake side using an EGR valve has been proposed (for example, see Patent Document 1). In this apparatus, when the control amount of the ISC valve changes more than a predetermined value while the abnormality determination of the EGR valve is being performed, the abnormality determination of the EGR valve based on the change in the intake air amount in the intake pipe is stopped. It is said that the abnormality determination of the EGR valve can be accurately performed without being affected by the change in the intake air amount accompanying the change in the control amount of the valve.
JP-A-8-158955

  In the above-described internal combustion engine device, the abnormality of the EGR valve is determined based on the change in the intake air amount, but there is also an apparatus that inspects the EGR valve based on the intake pressure that is the pressure of the intake air in the intake pipe. If the EGR valve is inspected based on the intake pressure, the operation of the EGR valve may not be properly inspected. For example, in general, in an internal combustion engine device, idle control amount learning for learning a control amount at the time of idling the engine is performed, but when the history of idle control amount learning is erased by inspection of the internal combustion engine device or the like. Until the next idle control amount learning is completed, a predetermined initial value at which the engine can be stably operated may be set as the idle control amount. In general, these initial values are not considered for EGR valve inspection even if suppression of engine stall is taken into account, and the EGR valve cannot be properly inspected when the initial value is set as the idle control amount. Sometimes. In particular, when the opening of the throttle valve, which is one of the idle control amounts, is set to be relatively large in order to suppress engine stall, the negative pressure in the intake pipe becomes small. Therefore, even if the EGR valve is opened and closed, the intake pressure In some cases, the EGR valve cannot be properly inspected.

  The main object of the internal combustion engine device and the vehicle and the valve inspection execution method of the present invention is to more appropriately perform the inspection of the valve for adjusting the supply amount of the exhaust gas of the internal combustion engine to the intake system.

  The internal combustion engine device and the vehicle and the valve inspection execution method of the present invention employ the following means in order to achieve the main object described above.

The internal combustion engine device of the present invention is
An internal combustion engine;
An exhaust supply means for adjusting a supply amount of exhaust gas of the internal combustion engine to an intake system, and opening the valve to supply the exhaust gas to the intake system;
An intake pressure detecting means for detecting an intake pressure which is a pressure of intake air in the intake system;
Learning that an idle control amount learning for learning an idle control amount that is a control amount for idling the internal combustion engine is stored as a learning history, and the learning history is deleted when a predetermined erasure condition is satisfied History storage means;
When a predetermined valve inspection execution condition for executing a valve inspection for inspecting a normal operation of the valve of the exhaust gas supply unit based on the detected intake pressure is satisfied, a learning history is stored by the learning history storage unit. The valve inspection is performed when the learning history storage means does not store the valve inspection when the learning history storage means is not stored,
It is a summary to provide.

  In the internal combustion engine device of the present invention, a predetermined valve inspection execution condition for executing a valve inspection for inspecting a normal operation of a valve of the exhaust supply means based on an intake pressure that is a pressure of intake air in an intake system of the internal combustion engine. Is established, the valve check is performed when the learning history is stored as the learning history that the idle control amount learning for learning the idle control amount, which is the control amount for the idling operation of the internal combustion engine, is stored. When it is not stored, valve inspection is not performed. Since the valve inspection is not executed when the learning history is not stored, it is possible to avoid the inconvenience caused by executing the valve inspection in a state where the idle control amount learning is not completed. That is, since the valve inspection is executed in the state where the idle control amount learning is completed, the valve inspection can be performed more appropriately.

  In such an internal combustion engine device of the present invention, the idle control amount may be an idle throttle opening when the internal combustion engine is idling. In this case, when the predetermined valve inspection execution condition is satisfied, the valve inspection execution means determines the throttle opening of the internal combustion engine by the idle control amount learning when the learning history storage means stores the learning history. The valve inspection is executed in the state of the learned idle throttle opening, and when the learning history is not stored by the learning history storage means, the throttle opening of the internal combustion engine is determined in advance without executing the valve inspection. Further, it may be a means for setting a predetermined throttle opening.

  Further, in the internal combustion engine device of the present invention, the valve inspection execution means is configured to detect the detected intake pressure when the valve of the exhaust supply means is closed when the learning history is stored by the learning history storage means. The detected intake pressure when the first predetermined time has elapsed since the valve was opened from the closed state, and the valve closed after the first predetermined time has elapsed. Means for executing the valve inspection by determining whether or not the valve of the exhaust supply means normally operates based on the detected intake pressure when the second predetermined time has passed since It can also be. In this way, the valve inspection can be performed more appropriately.

  The vehicle according to the present invention includes the internal combustion engine device according to any one of the above-described aspects, that is, the internal combustion engine and a valve that adjusts the supply amount of exhaust gas from the internal combustion engine to the intake system. An exhaust supply means for opening the valve and supplying the exhaust gas to the intake system, an intake pressure detection means for detecting an intake pressure that is a pressure of intake air in the intake system, and an idling operation of the internal combustion engine A learning history storage means for storing, as a learning history, completion of idle control amount learning for learning an idle control amount that is a control amount, and for deleting the learning history when a predetermined erasing condition is satisfied, and the detected When a predetermined valve inspection execution condition for executing a valve inspection for inspecting the normal operation of the valve of the exhaust gas supply unit based on the intake pressure is satisfied, a learning history is recorded by the learning history storage unit. An internal combustion engine device comprising: a valve inspection execution unit that executes the valve inspection when the learning history is not stored, and a valve inspection execution unit that does not execute the valve inspection when a learning history is not stored by the learning history storage unit; Connected to three axes of a motor, a drive shaft connected to an axle, an output shaft of the internal combustion engine, and a rotating shaft of the generator, and based on power input / output to / from any two of the three shafts Three-axis power input / output means for inputting / outputting power to / from the remaining shaft, an electric motor for inputting / outputting power to / from the drive shaft, and power storage means for exchanging electric power with the generator and the motor. The gist.

  Since the vehicle according to the present invention is equipped with the internal combustion engine device of the present invention according to any one of the above-described aspects, the effect exhibited by the internal combustion engine device according to the present invention, for example, the effect that the valve inspection can be performed more appropriately, etc. Similar effects can be achieved.

The valve inspection execution method of the present invention includes:
An internal combustion engine, an exhaust supply means having a valve for adjusting the supply amount of exhaust gas from the internal combustion engine to the intake system, and opening the valve to supply the exhaust gas to the intake system; and when the internal combustion engine is idling An internal combustion engine comprising: learning history storage means for storing, as a learning history, completion of idle control amount learning for learning an idle control amount, which is a control amount of the control amount, and erasing the learning history when a predetermined erasure condition is satisfied An execution method of valve inspection for inspecting normal operation of a valve of the exhaust supply means in an engine device,
The learning history storage means when a predetermined valve inspection execution condition for executing a valve inspection for inspecting a normal operation of a valve of the exhaust supply means based on an intake pressure which is a pressure of intake air in the intake system is satisfied. When the learning history is stored, the valve inspection is executed, and when the learning history is not stored by the learning history storage means, the valve inspection is not executed.

  In this valve inspection execution method of the present invention, a predetermined valve inspection for executing a valve inspection for inspecting the normal operation of the valve of the exhaust gas supply means based on the intake pressure which is the pressure of the intake air in the intake system of the internal combustion engine. When the execution condition is satisfied, when the learning history is stored that the idle control amount learning that learns the idle control amount that is the control amount when the internal combustion engine is idling is performed, the valve inspection is performed, and the learning history When no is stored, the valve inspection is not executed. Since the valve inspection is not executed when the learning history is not stored, it is possible to avoid the inconvenience caused by executing the valve inspection in a state where the idle control amount learning is not completed. That is, since the valve inspection is executed in the state where the idle control amount learning is completed, the valve inspection can be performed more appropriately. Here, the “idle control amount” may be a throttle opening when the internal combustion engine is idling.

  Next, the best mode for carrying out the present invention will be described using examples.

  FIG. 1 is a configuration diagram showing an outline of the configuration of a hybrid vehicle 20 equipped with an internal combustion engine device according to an embodiment of the present invention. As illustrated, the hybrid vehicle 20 of the embodiment includes an engine 22, a planetary gear mechanism 30 in which a carrier 34 is connected to a crankshaft 26 as an output shaft of the engine 22 via a damper 28, and a planetary gear mechanism 30. A motor MG1 capable of generating electricity with a rotor connected to the sun gear 31, and a ring gear connected to the drive wheels 63a and 63b of the vehicle via the gear mechanism 60 and the differential gear 62 and to the ring gear 32 of the planetary gear mechanism 30. Motor MG2 having a rotor connected to shaft 32a via reduction gear 35, battery 50 for exchanging electric power with motors MG1 and MG2 via inverters 41 and 42, and hybrid electronic control unit 70 for controlling the entire vehicle. With. The motors MG1 and MG2 are both driven and controlled by a motor electronic control unit (hereinafter referred to as motor ECU) 40, and the motor ECU 40 has signals necessary for driving and controlling the motors MG1 and MG2, for example, Signals from rotational position detection sensors 43 and 44 that detect the rotational positions of the rotors of the motors MG1 and MG2 are input. The motor ECU 40 outputs switching control signals to the inverters 41 and 42. Further, the motor ECU 40 outputs data related to the states of the motors MG1, MG2 to the hybrid electronic control unit 70 by communication as necessary. Further, the battery 50 is managed by a battery electronic control unit (hereinafter referred to as a battery ECU) 52, and the battery ECU 52 has a signal necessary for managing the battery 50, for example, installed between terminals of the battery 50. Terminal voltage from the voltage sensor (not shown), charge / discharge current from a current sensor (not shown) attached to the power line 54 connected to the output terminal of the battery 50, battery from the temperature sensor 51 attached to the battery 50 The temperature Tb or the like is input, and data relating to the state of the battery 50 is output to the hybrid electronic control unit 70 by communication as necessary.

  The engine 22 is configured as an internal combustion engine capable of outputting power using a hydrocarbon-based fuel such as gasoline or light oil, and the air purified by an air cleaner 122 is passed through a throttle valve 124 as shown in FIG. Inhalation and gasoline are injected from the fuel injection valve 126 to mix the sucked air and gasoline, and this mixture is sucked into the combustion chamber through the intake valve 128 and explosively burned by an electric spark from the spark plug 130. Thus, the reciprocating motion of the piston 132 pushed down by the energy is converted into the rotational motion of the crankshaft 26. The exhaust from the engine 22 is purified by having a purification catalyst (three-way catalyst) 134a that purifies harmful components such as carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx) by opening an exhaust valve 129. The air is discharged to the outside air via the device 134 and supplied to the intake side via the EGR system 160. The EGR system 160 includes an EGR pipe 162 that is connected to the rear stage of the purification device 134 and supplies exhaust gas to a surge tank on the intake side, and an EGR valve 164 that is disposed in the EGR pipe 162 and is driven by a stepping motor 163. Then, by adjusting the opening degree of the EGR valve 164, the supply amount of exhaust gas as non-combustion gas is adjusted and supplied to the intake side. In this way, the engine 22 can suck a mixture of air, exhaust, and gasoline into the combustion chamber.

  The engine 22 is controlled by an engine electronic control unit (hereinafter referred to as engine ECU) 24. The engine ECU 24 is configured as a microprocessor centered on the CPU 24a, and includes a ROM 24b that stores a processing program, a RAM 24c that temporarily stores data, an input / output port and a communication port (not shown), in addition to the CPU 24a. . The engine ECU 24 receives signals from various sensors that detect the state of the engine 22, for example, a crank position from the crank position sensor 140 that detects the rotational position of the crankshaft 26, and a water temperature that detects the temperature of cooling water in the engine 22. Cooling water temperature Tw from sensor 142, in-cylinder pressure from a pressure sensor (not shown) installed in the combustion chamber, and a cam that detects the rotational position of a camshaft that opens and closes intake valve 128 and intake valve 129 for intake and exhaust to the combustion chamber A cam position from the position sensor 144; a throttle position from the throttle valve position sensor 146 that detects the position of the throttle valve 124; an intake air amount GA from an air flow meter 148 that is attached to the intake pipe and detects the mass flow rate of the intake air; the same The intake air temperature from the temperature sensor 149 attached to the intake pipe, the intake pressure Pin from the intake pressure sensor 158 that detects the pressure in the intake pipe, the air-fuel ratio from the air-fuel ratio sensor 135a, the oxygen signal from the oxygen sensor 135b, etc. are input. Is entered through the port. The engine ECU 24 also integrates various control signals for driving the engine 22, such as a drive signal to the fuel injection valve 126, a drive signal to the throttle motor 136 that adjusts the position of the throttle valve 124, and an igniter. The control signal to the ignition coil 138, the control signal to the variable valve timing mechanism 150 that can change the opening / closing timing of the intake valve 128, the drive signal to the stepping motor 163 that adjusts the opening of the EGR valve 164, and the like are output. It is output through the port. When the learning condition such as the condition that the cooling water temperature Tw of the engine 22 is equal to or higher than a predetermined temperature (for example, 75 ° C., 80 ° C., 85 ° C.) or the condition that the engine 22 is idling is established. The opening degree of the throttle valve 124, the fuel injection amount from the fuel injection valve 126, the ignition timing by the ignition plug 130, etc. necessary for setting the engine speed Ne to the idling engine speed Nidl (for example, 900 rpm, 1000 rpm, etc.) Idle learning for learning a control amount for idle operation (hereinafter referred to as idle control amount) is executed, and the learned value is stored in the RAM 24c and used for the next idle control of the engine 22. The engine ECU 24 also stores information on whether or not such idle learning is completed (hereinafter referred to as idle learning history) in the RAM 24c. The stored learning value and idle learning history are not erased when the ignition is turned off, but are erased when the power supply to the engine ECU 24 is stopped by removing the battery 50 or checking the engine 22, etc. When the idle learning history is deleted, the engine ECU 24 uses the initial value stored in the ROM 24b for the control during the idle operation of the engine 22 until the next idle learning is completed. Further, the engine ECU 24 is in communication with the hybrid electronic control unit 70, controls the operation of the engine 22 by a control signal from the hybrid electronic control unit 70, and outputs data related to the operation state of the engine 22 as necessary. . The engine ECU 24 also calculates the rotational speed of the crankshaft 26, that is, the rotational speed Ne of the engine 22 based on the crank position from the crank position sensor 140.

  The hybrid electronic control unit 70 is configured as a microprocessor centered on the CPU 72, and in addition to the CPU 72, a ROM 74 for storing processing programs, a RAM 76 for temporarily storing data, an input / output port and communication not shown. And a port. The hybrid electronic control unit 70 includes an ignition signal from an ignition switch 80, a shift position SP from a shift position sensor 82 that detects the operation position of the shift lever 81, and an accelerator pedal position sensor 84 that detects the amount of depression of the accelerator pedal 83. The accelerator pedal opening Acc from the vehicle, the brake pedal position BP from the brake pedal position sensor 86 for detecting the depression amount of the brake pedal 85, the vehicle speed V from the vehicle speed sensor 88, and the like are input via the input port. As described above, the hybrid electronic control unit 70 is connected to the engine ECU 24, the motor ECU 40, and the battery ECU 52 via the communication port, and exchanges various control signals and data with the engine ECU 24, the motor ECU 40, and the battery ECU 52. ing.

  The hybrid vehicle 20 of the embodiment thus configured calculates the required torque to be output to the ring gear shaft 32a as the drive shaft based on the accelerator opening Acc and the vehicle speed V corresponding to the depression amount of the accelerator pedal 83 by the driver. Then, the operation of the engine 22, the motor MG1, and the motor MG2 is controlled so that the required power corresponding to the required torque is output to the ring gear shaft 32a. As operation control of the engine 22, the motor MG1, and the motor MG2, the operation of the engine 22 is controlled so that power corresponding to the required power is output from the engine 22, and all of the power output from the engine 22 is transmitted to the planetary gear mechanism 30. Torque conversion is performed by the motor MG1 and the motor MG2, and the torque conversion operation mode for driving and controlling the motor MG1 and the motor MG2 so as to be output to the ring gear shaft 32a and the power required for charging and discharging the battery 50 are met. Operation of the engine 22 is controlled so that power is output from the engine 22, and all or part of the power output from the engine 22 with charge / discharge of the battery 50 is transmitted to the planetary gear mechanism 30, the motor MG1, and the motor MG2. The required power is output to the ring gear shaft 32a with torque conversion by A charge / discharge operation mode for driving and controlling the motor MG1 and the motor MG2 and a motor operation mode for controlling the operation so that the operation of the engine 22 is stopped and power corresponding to the required power from the motor MG2 is output to the ring gear shaft 32a. .

  Next, the operation of the internal combustion engine device mounted on the hybrid vehicle 20 of the embodiment thus configured, particularly the operation when inspecting the EGR valve 164 will be described. Here, the internal combustion engine device of the embodiment mainly corresponds to the engine 22, the EGR system 160, and the engine ECU 24. FIG. 3 is a flowchart showing an example of a control routine executed when the inspection condition is satisfied, which is executed by the engine ECU 24. The control routine when the inspection condition is satisfied is executed when a valve inspection execution condition for executing the inspection of the EGR valve 164 is satisfied after the accelerator is turned off and the EGR valve 164 is fully closed. Here, the valve inspection execution condition is that a predetermined time (for example, 0.8 seconds, 1.0 seconds, 1.2 seconds, etc.) has elapsed since the accelerator was turned off and the fuel injection to the engine 22 was stopped. Or a predetermined time during which it can be determined that the intake air amount is stable in a state where the intake air change amount is less than a threshold value where it can be determined that the intake air amount of the engine 22 is stable. (E.g., 0.8 seconds, 1.0 seconds, 1.2 seconds, etc.) has elapsed, and it is necessary to stabilize the pressure in the intake pipe after the accelerator is turned off and the EGR valve 164 is fully closed. A predetermined time (for example, 0.8 seconds, 1.0 seconds, 1.2 seconds, etc.) has passed, and the cooling water temperature Tw of the engine 22 from the water temperature sensor 142 indicates that the engine 22 has been warmed up. A predetermined temperature (for example, 65 ° C. or 70 ° C. 75 It ℃ is higher etc.), and as the amount of change in rotation speed Ne of the engine 22 is satisfied when filled all that is less than the predetermined amount of change.

  When the control routine when the inspection condition is satisfied is executed, the CPU 24a of the engine ECU 24 checks whether or not the idle learning history is stored in the RAM 24c (step S100), and when the idle learning history is stored, the throttle valve 124 is stored. The throttle motor 136 is driven so that the opening degree becomes the learning opening degree THidl which is the learning value stored in the RAM 24c (step S110), and the EGR valve inspection routine of FIG. 4 is executed to inspect the EGR valve 164. (Step S120), the control routine when the inspection condition is satisfied is terminated. Here, the inspection of the EGR valve 164 will be described.

  FIG. 4 is a flowchart showing an example of an EGR valve inspection routine. When the EGR valve inspection routine of FIG. 4 is executed, the CPU 24a of the engine ECU 24 first executes a process of inputting the intake pressure Pin from the intake pressure sensor 158 and storing it as a start closing closing intake pressure Psta in a predetermined area of the RAM 24c. (Step S200). Subsequently, the stepping motor 163 is driven so that the opening degree of the EGR valve 164 becomes a predetermined opening degree EBref (for example, an opening degree corresponding to 80 degrees or fully open) (step S210), and thus the stepping motor 163 is driven. Until a predetermined time t1 (for example, 1 second, 1.2 seconds, 1.4 seconds, etc.) determined by experiments or the like has elapsed as a time required for the pressure in the intake pipe of the engine 22 to stabilize. (Step S220), the intake pressure Pin is input from the intake pressure sensor 158, and stored in a predetermined area of the RAM 24c as the opening intake pressure Popn (Step S230). When the execution of this routine is started, since the EGR valve 164 is fully closed, the process of step S210 is a process of opening the opening of the EGR valve 164 from the value 0 to a predetermined opening EBref. Next, the stepping motor 163 is driven so that the EGR valve 164 is fully closed (step S240), and an experiment or the like is performed as the time required for the pressure in the intake pipe of the engine 22 to stabilize after the stepping motor 163 is driven in this way. (Step S250), the intake pressure Pin from the intake pressure sensor 158 is input, and the RAM 24c is input to wait for a predetermined time t2 (for example, 1 second, 1.2 seconds, 1.4 seconds, etc.) to elapse. Is stored as the end-close intake pressure Pend (step S260), and is determined by the following expression (1) based on the stored start-close intake pressure Psta, open-end intake pressure Popn, and end-close intake pressure Pend. A value Pdec is calculated (step S270). When the calculated determination value Pdec is larger than the threshold value Pref, it is determined that the EGR valve 164 operates normally (steps S280, 290). When the calculated determination value Pdec is less than the threshold value Pref, the EGR valve 164 does not operate normally. Is determined (steps S280, 300), and the EGR valve inspection routine is terminated. Here, the threshold value Pref is used to determine an abnormality such as an open sticking that the EGR valve 164 is not closed from the open state, a closed sticking that the EGR valve 164 is not opened from the closed state, or a failure of the stepping motor 163. What was found was used. Thus, the normal operation of the EGR valve 164 can be inspected by using the intake pressure Pin when the EGR valve 164 is opened and closed. The inspection of the EGR valve 164 has been described above. As described above, when the idle learning history is stored, the EGR valve 164 can be inspected with the opening of the throttle valve 124 set to the learning opening THidl that is the learning value stored in the RAM 24c. .

  Pdec = Popn- (Psta + Pend) / 2 (1)

  When the learning of the idle control amount is not completed and the idle learning history is not stored (eg, immediately after the battery 50 is removed or the engine 22 is inspected) (step S100), the opening of the throttle valve 124 stabilizes the engine 22. The throttle motor 136 is driven so that the initial opening THinit determined by an experiment or the like is set in advance as an opening capable of idling operation (step S130), and the control routine when the inspection condition is satisfied is terminated without executing the inspection of the EGR valve 164 To do. Here, in the embodiment, the initial opening THinit is determined by considering engine stall suppression and engine 22 startability so that the engine 22 can be stably operated even when idle learning of the engine 22 is not completed. The opening is set to be larger than the opening that is assumed to be set as the idle control amount when learning is completed. As described above, the inspection of the EGR valve 164 is not performed when the idle learning history is not stored based on the following reason. When the idle learning history is not stored, the opening of the throttle valve 124 is set to a relatively large initial opening THinit, so the intake air amount of the engine 22 becomes larger than when the idle learning history is stored, The negative pressure in the intake pipe is smaller than when the idle learning history is stored (the pressure is close to atmospheric pressure). The inspection of the EGR valve 164 is performed using the intake pressure Pin detected when the EGR valve 164 is opened and closed as described above. However, when the negative pressure in the intake pipe is reduced, the intake when the EGR valve 164 is opened and closed is checked. The fluctuation of the atmospheric pressure Pin is reduced, and it is easier to erroneously determine the normal operation of the EGR valve 164 than when the idle learning history is stored. In order to avoid such an erroneous determination, the EGR valve 164 is not inspected when the idle learning history is not stored. In this way, since the inspection of the EGR valve 164 is not performed when the idle learning history is not stored, the inconvenience due to the absence of the idle learning history can be avoided, and the normal operation of the EGR valve 164 can be further improved. It can be properly inspected.

  According to the hybrid vehicle of the embodiment described above, the EGR valve 164 is inspected when the idle learning history is stored in the RAM 24c, and the EGR valve 164 is inspected when the idle learning history is not stored in the RAM 24c. Therefore, it is possible to avoid the inconvenience caused by the inspection of the EGR valve 164 being executed when the learning of the idle control amount is not completed, that is, the valve inspection is executed when the idle control amount learning is completed. Therefore, the valve inspection can be performed more appropriately. In addition, when the idle learning history is stored in the RAM 24c, the predetermined time t1 has elapsed after the intake pressure Psta when the EGR valve 164 is closed and the opening operation of the EGR valve 164 when the EGR valve 164 is closed. Whether or not the EGR valve 164 operates normally based on the intake pressure opn at the time and the intake pressure end when the predetermined time t2 has elapsed after the closing operation of the EGR valve 164 after the predetermined time t1 has elapsed. As a result, the valve inspection of the EGR valve 164 is executed, so that the valve inspection can be performed more appropriately.

  In the hybrid vehicle 20 of the embodiment, the start-close intake pressure Psta and the EGR valve 164 that are the intake pressure Pin from the intake pressure sensor 158 when the EGR valve 164 is fully closed when the execution of the EGR valve inspection is started. The stepping motor 163 is fully closed so that the opening-time intake pressure Popn and the EGR valve 164 are fully closed when the predetermined time t1 has passed after the stepping motor 163 is driven so that the opening degree of the opening EBref becomes the predetermined opening degree EBref. It is determined whether or not the EGR valve 164 normally operates based on the intake air pressure Pin at the end closing time, which is the intake air pressure Pin when a predetermined time t2 has elapsed since the drive of the engine. As long as the EGR valve inspection is executed based on the intake pressure Pin from 158, for example, the intake air at the time of opening It is determined whether the EGR valve 164 operates normally by using only the Popn and the start / close intake pressure Psta based on whether the difference is greater than or less than the threshold value, or the open intake pressure Popn and the end close intake pressure. Whether or not the EGR valve 164 operates normally may be determined based on whether these differences are equal to or greater than a threshold value or less than the threshold value using only the atmospheric pressure Pend.

  In the hybrid vehicle 20 of the embodiment, the power of the motor MG2 is shifted by the reduction gear 35 and output to the ring gear shaft 32a. However, as illustrated in the hybrid vehicle 120 of the modified example of FIG. May be output to an axle (an axle connected to the wheels 64a and 64b in FIG. 5) different from an axle to which the ring gear shaft 32a is connected (an axle to which the drive wheels 63a and 63b are connected).

  In the embodiment, the hybrid vehicle that travels using the power from the engine and the power from the motor has been described. However, the present invention may be applied to a vehicle that travels using only the power from the engine.

  In addition, if an internal combustion engine device mainly including the engine 22, the EGR system 160, and the engine ECU 24 is provided, the same control as in the embodiment can be performed, so that a moving body such as an automobile, a vehicle, a ship, an aircraft, etc. It is good also as a form of the internal-combustion engine apparatus mounted in the thing of the form of the internal-combustion engine apparatus mounted in, or a construction machine etc. which does not move. In addition, a valve inspection execution method for inspecting the normal operation of a valve that adjusts the supply amount of the exhaust gas supplied from the exhaust gas supply device to the intake system in the internal combustion engine device may be employed.

  Here, the correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the engine 22 corresponds to the “internal combustion engine”, the EGR system 160 corresponds to the “exhaust supply unit”, the intake pressure sensor 158 corresponds to the “intake pressure detection unit”, and learning of the idle control amount is completed. The RAM 24c is stored as an idle learning history and the learning memory is erased when the power supply to the engine ECU 24 is stopped. The RAM 24c corresponds to a “learning history storage unit”, and the EGR valve 164 is executed based on the intake pressure Pin. When the execution condition for performing is satisfied, when the idle learning history is stored in the RAM 24c, the processing of the control routine when the inspection condition is satisfied in FIG. When the EGR valve inspection routine is executed or the idle learning history is not stored in the RAM 24c The engine ECU24 for executing the processing of steps S100, S130 of the test condition is satisfied when the control routine of FIG. 3 is not executed valve inspection corresponds to the "valve test execution unit". Further, the motor MG1 corresponds to a “generator”, the planetary gear mechanism 30 corresponds to a “triaxial power input / output unit”, the motor MG2 corresponds to a “motor”, and the battery 50 corresponds to a “power storage unit”. To do.

  Here, the “internal combustion engine” is not limited to an internal combustion engine that outputs power using a hydrocarbon fuel such as gasoline or light oil, and may be any type of internal combustion engine such as a hydrogen engine. The “exhaust supply means” is not limited to the EGR system 160, and has a valve for adjusting the supply amount of the exhaust gas of the internal combustion engine to the intake system, and opens the valve to supply the exhaust gas to the intake system. Anything can be used. The “intake pressure detecting means” is not limited to the intake pressure sensor 158, and any means may be used as long as it detects the intake pressure that is the pressure of the intake air in the intake system. The learning history storage means is not limited to the RAM 24c. The learning history storage means stores, as a learning history, the completion of idle control amount learning for learning an idle control amount that is a control amount for idling the internal combustion engine. Any learning history can be used as long as the learning history is erased when the erasure condition is satisfied. The “valve inspection execution means” is not limited to a single electronic control unit, and may be constituted by a plurality of electronic control units. The “valve inspection execution means” executes the inspection of the EGR valve 164 when the execution condition for executing the EGR valve 164 is established based on the intake pressure Pin, and when the idle learning history is stored in the RAM 24c. When the idle learning history is not stored in the RAM 24c, the valve inspection is not limited to that in which the valve inspection is not performed, but the valve inspection for inspecting the normal operation of the valve of the exhaust supply means is performed based on the detected intake pressure. When a predetermined valve inspection execution condition is established, the valve inspection is executed when the learning history is stored by the learning history storage means, and the valve inspection is not executed when the learning history is not stored by the learning history storage means. Any object can be used. The “generator” is not limited to the motor MG1 configured as a synchronous generator motor, and may be any type of generator as long as it can input and output power, such as an induction motor. The “three-axis power input / output means” is not limited to the planetary gear mechanism 30 described above, but uses a double pinion type planetary gear mechanism, a combination of a plurality of planetary gear mechanisms, or a differential gear. In this way, the drive shaft connected to the axle, the output shaft of the internal combustion engine, and the rotating shaft of the generator are connected to three shafts, such as those having a differential action different from the planetary gear, and any two of the three shafts As long as the power is input / output to / from the remaining shafts based on the power input / output to / from the shafts, any device may be used. The “motor” is not limited to the motor MG2 configured as a synchronous generator motor, and may be any type of motor such as an induction motor that inputs and outputs power to the drive shaft. The “storage means” is not limited to the battery 50 as a secondary battery, and may be anything as long as it exchanges power with a generator and an electric motor such as a capacitor.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. It is an example for specifically explaining the best mode for doing so, and does not limit the elements of the invention described in the column of means for solving the problem. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  The best mode for carrying out the present invention has been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the gist of the present invention. Of course, it can be implemented in the form.

  The present invention is applicable to an internal combustion engine device, a vehicle manufacturing industry, and the like.

1 is a configuration diagram showing an outline of the configuration of a hybrid vehicle 20 equipped with an internal combustion engine device according to an embodiment of the present invention. 2 is a configuration diagram showing an outline of the configuration of an engine 22. FIG. It is a flowchart which shows an example of the control routine at the time of the test condition satisfaction performed by engine ECU24 of an Example. It is a flowchart which shows an example of the EGR valve test | inspection routine performed by engine ECU24 of an Example. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 120 according to a modification.

Explanation of symbols

  20,120 Hybrid vehicle, 22 engine, 24 engine electronic control unit (engine ECU), 24a CPU, 24b ROM, 24c RAM, 26 crankshaft, 28 damper, 30 planetary gear mechanism, 31 sun gear, 32 ring gear, 32a ring gear shaft , 33 pinion gear, 34 carrier, 35 reduction gear, 40 motor electronic control unit (motor ECU), 41, 42 inverter, 43, 44 rotational position detection sensor, 50 battery, 51 temperature sensor, 52 battery electronic control unit (battery) ECU), 54 power line, 60 gear mechanism, 62 differential gear, 63a, 63b drive wheel, 64a, 64b wheel, 70 hybrid electronic control unit, 72 CPU, 74 ROM, 76 AM, 80 ignition switch, 81 shift lever, 82 shift position sensor, 83 accelerator pedal, 84 accelerator pedal position sensor, 85 brake pedal, 86 brake pedal position sensor, 88 vehicle speed sensor, 122 air cleaner, 124 throttle valve, 126 fuel injection valve , 128 Intake valve, 129 Exhaust valve, 130 Spark plug, 132 Piston, 134 Purification device, 135a Air-fuel ratio sensor, 135b Oxygen sensor, 136, Throttle motor, 138 Ignition coil, 140 Crank position sensor, 142 Water temperature sensor, 143 Pressure sensor 144 cam position sensor, 146 throttle valve position sensor, 148 air flow meter, 149 temperature sensor, 50 variable valve timing mechanism, 158 suction pressure sensor, 160 EGR system, 162 EGR pipe, 163 a stepping motor, 164 EGR valve, MG1, MG2 motor.

Claims (6)

An internal combustion engine;
An exhaust supply means for adjusting a supply amount of exhaust gas of the internal combustion engine to an intake system, and opening the valve to supply the exhaust gas to the intake system;
An intake pressure detecting means for detecting an intake pressure which is a pressure of intake air in the intake system;
Learning that an idle control amount learning that learns an idle control amount that is a control amount for idling the internal combustion engine is stored as a learning history, and learning that erases the learning history when a predetermined erasure condition is satisfied History storage means;
When a predetermined valve inspection execution condition for executing a valve inspection for inspecting a normal operation of the valve of the exhaust supply unit based on the detected intake pressure is satisfied, a learning history is stored by the learning history storage unit. The valve inspection is executed when the learning history storage means does not store the valve inspection when the learning history storage means does not execute the valve inspection,
An internal combustion engine device comprising: The internal combustion engine device according to claim 1,
The idle control amount is an idle throttle opening when the internal combustion engine is idling. An internal combustion engine device according to claim 2,
The valve inspection execution means learns the throttle opening of the internal combustion engine by the idle control amount learning when the predetermined valve inspection execution condition is satisfied and when the learning history is stored by the learning history storage means. The valve inspection is performed in the state of the idle throttle opening, and when the learning history is not stored by the learning history storage means, the throttle opening of the internal combustion engine is determined in advance without performing the valve inspection. An internal combustion engine device that is a means for setting the throttle opening. An internal combustion engine device according to any one of claims 1 to 3,
When the learning history is stored in the learning history storage unit, the valve inspection execution unit controls the detected intake pressure when the valve of the exhaust supply unit is closed and the valve from the closed state. The detected intake pressure when the first predetermined time has elapsed from the opened state and the second predetermined time after the valve has been closed after the first predetermined time has elapsed. An internal combustion engine device that performs the valve inspection by determining whether or not the valve of the exhaust gas supply means operates normally based on the detected intake pressure at that time. An internal combustion engine device according to any one of claims 1 to 4,
A generator that inputs and outputs power;
It is connected to three shafts, that is, a drive shaft coupled to an axle, an output shaft of the internal combustion engine, and a rotating shaft of the generator, and the remaining power is determined based on power input / output to / from any two of the three shafts. 3-axis power input / output means for inputting / outputting power to the shaft;
An electric motor for inputting and outputting power to the drive shaft;
Power storage means for exchanging power with the generator and the motor;
A vehicle comprising: An internal combustion engine, an exhaust supply means having a valve for adjusting the supply amount of exhaust gas from the internal combustion engine to the intake system, and opening the valve to supply the exhaust gas to the intake system; and when the internal combustion engine is idling An internal combustion engine comprising: learning history storage means for storing, as a learning history, completion of idle control amount learning for learning an idle control amount, which is a control amount of the control amount, and erasing the learning history when a predetermined erasure condition is satisfied An execution method of valve inspection for inspecting normal operation of a valve of the exhaust supply means in an engine device,
The learning history storage means when a predetermined valve inspection execution condition for executing a valve inspection for inspecting a normal operation of a valve of the exhaust supply means based on an intake pressure which is a pressure of intake air in the intake system is satisfied. The valve inspection is executed when the learning history is stored by the above-described method, and the valve inspection is not executed when the learning history is not stored by the learning history storage means.

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