WO2018207840A1 - Learning device and learning method - Google Patents

Learning device and learning method Download PDF

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Publication number
WO2018207840A1
WO2018207840A1 PCT/JP2018/017979 JP2018017979W WO2018207840A1 WO 2018207840 A1 WO2018207840 A1 WO 2018207840A1 JP 2018017979 W JP2018017979 W JP 2018017979W WO 2018207840 A1 WO2018207840 A1 WO 2018207840A1
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Prior art keywords
pressure
pressure sensor
detected
difference
exhaust
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PCT/JP2018/017979
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French (fr)
Japanese (ja)
Inventor
裕貴 川▲崎▼
ワサンタ 大下
佑樹 菅谷
哲史 塙
良文 花村
佐藤　淳一
Original Assignee
いすゞ自動車株式会社
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Application filed by いすゞ自動車株式会社 filed Critical いすゞ自動車株式会社
Priority to CN201880030877.1A priority Critical patent/CN110621867B/en
Publication of WO2018207840A1 publication Critical patent/WO2018207840A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00

Definitions

  • the present disclosure relates to a learning apparatus and a learning method for learning the magnitude of individual variation of an intake pressure sensor and an exhaust pressure sensor of a vehicle.
  • Patent Document 1 discloses a method of storing atmospheric pressure measured under a predetermined condition and correcting a measured value of exhaust pressure based on a difference between the stored atmospheric pressure and the measured atmospheric pressure. Yes.
  • the correction value varies depending on the temperature when the conventional method is used. Therefore, when the conventional method is used, the correction value for correcting the influence of individual variation of the sensor is affected by the temperature characteristic of the atmospheric pressure sensor, and the accuracy of the correction value is low.
  • An object of the present disclosure is to provide a learning device and a learning method capable of improving the correction accuracy of the pressure by the atmospheric pressure sensor by the intake pressure sensor and the exhaust pressure sensor in the vehicle.
  • a learning device is a learning device that learns an error of an intake pressure sensor that detects an intake pressure of a vehicle and an exhaust pressure sensor that detects an exhaust pressure of the vehicle, and is an atmospheric pressure provided in the vehicle
  • a pressure acquisition unit that acquires the atmospheric pressure detected by the sensor in the predetermined temperature range, the intake pressure detected by the intake pressure sensor in the predetermined temperature range, and the exhaust pressure detected by the exhaust pressure sensor in the predetermined temperature range.
  • a second pressure difference that is a difference between the exhaust pressure detected by the exhaust pressure sensor and the atmospheric pressure detected by the atmospheric pressure sensor in the predetermined temperature range in the predetermined temperature range is stored in the storage unit.
  • a learning unit that stores the first pressure difference and the second pressure difference in the storage unit, and then corrects the intake pressure detected by the intake pressure sensor based on the first pressure difference.
  • a correction unit that corrects the exhaust pressure detected by the exhaust pressure sensor based on the second pressure difference.
  • the learning unit starts the engine of the vehicle when a temperature detected by a temperature sensor provided in the vehicle is less than a lower limit value of the predetermined temperature range, and the temperature detected by the temperature sensor is the predetermined temperature.
  • the first pressure difference and the second pressure difference when the engine is stopped after reaching the temperature range may be stored in the storage unit.
  • the learning unit waits until a predetermined time elapses after energization of the atmospheric pressure sensor, the intake pressure sensor, and the exhaust pressure sensor, and then the first pressure difference and the second pressure.
  • the difference may be stored in the storage unit.
  • the learning unit stores the first pressure difference and the second pressure difference in the storage unit after confirming that the intake pressure sensor, the exhaust pressure sensor, and the atmospheric pressure sensor have not failed. May be.
  • the learning unit smoothes the smoothed intake pressure obtained by smoothing the intake pressure detected by the intake pressure sensor within the predetermined time and the atmospheric pressure detected by the atmospheric pressure sensor within the predetermined time.
  • the difference between the smoothed exhaust pressure and the smoothed atmospheric pressure which is obtained by calculating the difference from the smoothed atmospheric pressure as the first pressure difference and smoothing the exhaust pressure detected by the exhaust pressure sensor within the predetermined time. May be calculated as the second pressure difference.
  • a learning method of the present disclosure is a learning method for learning an error of an intake pressure sensor that detects an intake pressure of a vehicle and an exhaust pressure sensor that detects an exhaust pressure of the vehicle, which is executed by a computer, and is provided in the vehicle
  • the atmospheric pressure detected by the atmospheric pressure sensor in a predetermined temperature range, the intake pressure detected by the intake pressure sensor in the predetermined temperature range, and the exhaust pressure detected by the exhaust pressure sensor in the predetermined temperature range.
  • a first pressure difference that is a difference between an intake pressure detected by the intake pressure sensor and an atmospheric pressure detected by the atmospheric pressure sensor in the predetermined temperature range in a state where the engine of the vehicle is stopped; and The difference between the exhaust pressure detected by the exhaust pressure sensor and the atmospheric pressure detected by the atmospheric pressure sensor in the predetermined temperature range with the engine stopped.
  • the learning device and the learning method of the present disclosure it is possible to improve the correction accuracy of the pressure by the atmospheric pressure sensor by the intake pressure sensor and the exhaust pressure sensor in the vehicle.
  • FIG. 1 is a diagram showing the configuration of an intake system and an exhaust system in a vehicle.
  • FIG. 2 is a diagram illustrating a configuration of the ECM.
  • FIG. 3 is a flowchart showing the procedure of ECM processing.
  • FIG. 4 is a sequence diagram illustrating a flow when learning by ECM is performed using a tool.
  • FIG. 1 is a diagram illustrating a configuration of an intake system and an exhaust system in the vehicle 1 of the present embodiment.
  • the vehicle 1 can be connected to a tool 2 configured by a computer or the like used by the manufacturer or dealer of the vehicle 1, and the manufacturer or dealer can use the tool 2 for the intake pressure sensor and the exhaust pressure sensor of the vehicle 1.
  • Information for correcting individual variation can be transmitted to the vehicle 1.
  • the vehicle 1 includes an ECM (Engine Control Module) 10, an engine 11, an EGR (Exhaust Gas Recirculation) cooler 12, an EGR valve 13, a temperature sensor 14, an atmospheric pressure sensor 15, an intake pressure sensor 16, an exhaust pressure sensor 16. And an atmospheric pressure sensor 17.
  • the ECM 10 is a module that controls the engine 11 and peripheral components of the engine 11, and includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), an EEPROM (Electrically, Erasable Programmable, Read Only Memory), and the like.
  • the ECM 10 can send and receive various data to and from the tool 2.
  • the ECM 10 may transmit and receive data via the tool 2 and a cable, or may transmit and receive data via radio waves.
  • the ECM 10 calculates the EGR flow rate based on the ratio between the exhaust pressure detected by the exhaust pressure sensor 17 and the intake pressure detected by the intake pressure sensor 16. Further, the ECM 10 controls the EGR valve 13 so that the oxygen concentration corresponding to the calculated EGR flow rate is within a predetermined range. Although details will be described later, the ECM 10 controls the atmospheric pressure sensor 15, the intake pressure sensor 16, and the Based on the atmospheric pressure detected by the exhaust pressure sensor 17, it functions as a learning device that learns a correction value for correcting the intake pressure detected by the intake pressure sensor 16 and the exhaust pressure detected by the exhaust pressure sensor 17.
  • the engine 11 generates power for driving the vehicle 1. Part of the exhaust discharged from the engine 11 is sent to the EGR cooler 12. The EGR cooler 12 cools the exhaust sent from the engine 11 and then returns it to the engine 11.
  • the EGR valve 13 is a valve for adjusting the amount of exhaust sent from the engine 11 to the EGR cooler 12.
  • the EGR valve 13 adjusts the amount of exhaust sent from the engine 11 to the EGR cooler 12 based on the control of the ECM 10.
  • the temperature sensor 14 is a temperature detection unit that detects the temperature around the intake pressure sensor 16 and the exhaust pressure sensor 17 (hereinafter also referred to as ambient temperature). The temperature sensor 14 notifies the detected temperature to the ECM 10.
  • FIG. 1 shows an example in which the vehicle 1 has one temperature sensor 14, the vehicle 1 has a plurality of temperature sensors 14 provided in the vicinity of the intake pressure sensor 16 and the exhaust pressure sensor 17. May be.
  • the atmospheric pressure sensor 15 is a pressure sensor that detects atmospheric pressure.
  • the atmospheric pressure sensor 15 may be provided at an arbitrary location of the vehicle, for example, in the vicinity of the engine 11.
  • the atmospheric pressure sensor 15 notifies the ECM 10 of the detected atmospheric pressure.
  • the intake pressure sensor 16 is a pressure sensor that detects the pressure of air flowing into the engine 11 via an intercooler (not shown).
  • the intake pressure sensor 16 detects, for example, a boost pressure, which is a pressure of compressed air sent to the engine 11 by a supercharger (not shown), as the intake pressure.
  • the intake pressure sensor 16 is provided in a pipe between the intercooler and the engine 11. The intake pressure sensor 16 notifies the ECM 10 of the detected intake pressure.
  • the exhaust pressure sensor 17 is a pressure sensor that detects the pressure of exhaust gas sent from the engine 11 to the EGR cooler 12.
  • the exhaust pressure sensor 17 is provided in a pipe between the engine 11 and the EGR cooler 12. The exhaust pressure sensor 17 notifies the detected exhaust pressure to the ECM 10.
  • the ECM 10 includes the intake pressure sensor 16 based on the pressure detected by the atmospheric pressure sensor 15 in the temperature range where the individual variation widths of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 are small. And the deviation of the pressure detected by the exhaust pressure sensor 17 is learned. After the learning is completed, the ECM 10 corrects the pressure detected by the intake pressure sensor 16 and the exhaust pressure sensor 17 using the learned deviation, thereby suppressing the influence of variations in the intake pressure sensor 16 and the exhaust pressure sensor 17. .
  • FIG. 2 is a diagram illustrating the configuration of the ECM 10.
  • the ECM 10 includes a storage unit 101 and a control unit 102.
  • the storage unit 101 includes an EEPROM and a RAM.
  • the storage unit 101 stores a program executed by the control unit 102. Further, the storage unit 101 uses, as a learning value, a correction value corresponding to a deviation between the intake pressure detected by the intake pressure sensor 16 and the exhaust pressure detected by the exhaust pressure sensor 17 determined by learning by the learning unit 112 described later.
  • a learning value a correction value corresponding to a deviation between the intake pressure detected by the intake pressure sensor 16 and the exhaust pressure detected by the exhaust pressure sensor 17 determined by learning by the learning unit 112 described later.
  • the control unit 102 functions as a pressure acquisition unit 111, a learning unit 112, and a correction unit 113 by executing a program stored in the storage unit 101.
  • the pressure acquisition unit 111 includes an atmospheric pressure detected by the atmospheric pressure sensor 15 provided in the vehicle 1 in a predetermined temperature range, an intake pressure detected by the intake pressure sensor 16 in a predetermined temperature range, and an exhaust pressure sensor 17 determined by the predetermined pressure range.
  • the exhaust pressure detected in the temperature range is acquired.
  • the predetermined temperature range is a temperature range in which the variation ranges of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 are relatively small.
  • the pressure acquisition unit 111 notifies the learning unit 112 of the acquired atmospheric pressure, intake pressure, and exhaust pressure. Further, the pressure acquisition unit 111 notifies the correction unit 113 of the acquired intake pressure and exhaust pressure.
  • the learning unit 112 obtains a first pressure difference that is a difference between the intake pressure detected by the intake pressure sensor 16 and the atmospheric pressure detected by the atmospheric pressure sensor 15 in a predetermined temperature range with the engine 11 stopped.
  • the stored value is stored in the storage unit 101 as a learning value corresponding to the deviation of the intake pressure detected by 16.
  • the learning unit 112 also discharges a second pressure difference, which is a difference between the exhaust pressure detected by the exhaust pressure sensor 17 and the atmospheric pressure detected by the atmospheric pressure sensor 15 in a predetermined temperature range with the engine 11 stopped.
  • the learning unit 101 stores the learned value corresponding to the deviation of the exhaust pressure detected by the atmospheric pressure sensor 17.
  • the pressures detected by the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 are all the same.
  • the first pressure difference calculated by the learning unit 112 is not 0, it is considered that the first pressure difference is caused by variations in the intake pressure sensor 16 on the assumption that the deviation of the atmospheric pressure sensor 15 is sufficiently small.
  • the second pressure difference calculated by the learning unit 112 is not zero, it is considered that the second pressure difference is caused by variations in the exhaust pressure sensor 17 on the assumption that the deviation of the atmospheric pressure sensor 15 is sufficiently small.
  • the learning unit 112 starts the engine 11 of the vehicle 1 when the temperature detected by the temperature sensor 14 provided in the vehicle 1 is less than the lower limit value of the predetermined temperature range in order to perform learning in the predetermined temperature range. . Thereafter, the learning unit 112 causes the storage unit 101 to store the first pressure difference and the second pressure difference in a state where the engine 11 is stopped after the temperature detected by the temperature sensor 14 has reached a predetermined temperature range. By doing so, the learning unit 112 can compare the atmospheric pressure detected by the atmospheric pressure sensor 15 with high accuracy with the atmospheric pressure detected by the intake pressure sensor 16 and the atmospheric pressure detected by the exhaust pressure sensor 17. The deviation between the intake pressure sensor 16 and the exhaust pressure sensor 17 can be learned with high accuracy.
  • the learning unit 112 when the atmospheric pressure detected by the atmospheric pressure sensor 15 is 101.33 kPa and the atmospheric pressure detected by the intake pressure sensor 16 is 103.50 kPa, the learning unit 112 has a first pressure difference of 2.17 kPa. And When the atmospheric pressure detected by the exhaust pressure sensor 17 is 100.20 kPa, the learning unit 112 assumes that the second pressure difference is ⁇ 1.13 kPa.
  • the correction unit 113 corrects the intake pressure detected by the intake pressure sensor 16 based on the first pressure difference after the learning unit 112 stores the first pressure difference and the second pressure difference in the storage unit 101. Further, the correction unit 113 corrects the exhaust pressure detected by the exhaust pressure sensor 17 based on the second pressure difference. For example, when the first pressure difference is 2.17 kPa and the intake pressure detected by the intake pressure sensor 16 is 120.0 kPa, the correction unit 113 calculates the corrected intake pressure as 117.83 kPa. When the second pressure difference is ⁇ 1.13 kPa and the exhaust pressure detected by the exhaust pressure sensor 17 is 100.0 kPa, the correction unit 113 calculates the corrected exhaust pressure as 101.13 kPa.
  • FIG. 3 is a flowchart showing the processing procedure of the ECM 10.
  • the learning unit 112 refers to the storage unit 101 to check whether learning has already been performed (S11). If the learning unit 112 determines that learning has already been performed (Yes in S11), the process of the flowchart illustrated in FIG.
  • step S12 the learning unit 112 determines whether or not the temperature detected by the temperature sensor 14 is within a predetermined temperature range (S12). If the temperature is lower than the predetermined temperature range (No in S12), the learning unit 112 starts the engine 11 based on, for example, an operator's operation and starts warming up (S13). The learning unit 112 waits until the temperature detected by the temperature sensor 14 enters a predetermined temperature range.
  • the learning unit 112 determines that the temperature detected by the temperature sensor 14 is within the predetermined temperature range (Yes in S12), the learning unit 112 stops the engine 11 based on the operator's operation (S14). In addition, the learning part 112 advances a process to step S15, without performing step S14, when the engine 11 has stopped.
  • step S15 the learning unit 112 determines whether or not the ignition key is turned on (S15). If the ignition key is not turned on (No in S15), the ignition key is turned on. Wait until. If the learning unit 112 determines that the ignition key has been turned on (Yes in S15), the learning unit 112 monitors whether a predetermined time (for example, 6 seconds) has elapsed (S16).
  • a predetermined time for example, 6 seconds
  • the learning unit 112 is connected to the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 through the pressure acquisition unit 111 while waiting for a predetermined time after starting energization. Then, the atmospheric pressure, the intake pressure and the exhaust pressure detected by the atmospheric pressure sensor 15, the intake pressure sensor 16 and the exhaust pressure sensor 17 are acquired (S17). The learning unit 112 smoothes the atmospheric pressure, the intake pressure, and the exhaust pressure acquired within a predetermined time. The learning unit 112 calculates, for example, the average values of the atmospheric pressure, the intake pressure, and the exhaust pressure acquired by the pressure acquisition unit 111 from the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 within a predetermined time. Thus, the smoothed atmospheric pressure, the smoothed intake pressure and the smoothed exhaust pressure are calculated.
  • the learning unit 112 determines whether any one of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 has failed (S18).
  • the learning unit 112 for example, has a fluctuation amount of any one of the atmospheric pressure, the intake pressure, and the exhaust pressure acquired by the pressure acquisition unit 111 larger than a predetermined threshold value, or any value of the atmospheric pressure, the intake pressure, and the exhaust pressure. Is an abnormal value, it is determined that any one of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 has failed.
  • the learning unit 112 calculates the first pressure difference and the second pressure difference (difference value) after confirming that no failure has occurred in step S18. That is, the learning unit 112 determines that no failure has occurred in any of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 (No in S18), and then proceeds to step S19 to determine the intake pressure. A difference value between a smoothed intake pressure obtained by smoothing the intake pressure detected by the sensor 16 and a smoothed atmospheric pressure obtained by smoothing the atmospheric pressure detected by the atmospheric pressure sensor 15 is calculated as a first pressure difference. Further, the learning unit 112 calculates a difference value between the smoothed exhaust pressure obtained by smoothing the exhaust pressure detected by the exhaust pressure sensor 17 and the smoothed atmospheric pressure as the second pressure difference.
  • the learning unit 112 causes the storage unit 101 to store the calculated first pressure difference and second pressure difference as learning values (S20). Thereby, the learning unit 112 completes the learning and notifies the tool 2 that the learning is completed.
  • step S18 when the learning unit 112 determines that any one of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 has failed (Yes in S18), the learning unit 112 sets the tool 2 to An error message notifying that a failure has occurred is output (S21).
  • FIG. 4 is a sequence diagram illustrating a flow when learning by the ECM 10 is performed using the tool 2.
  • the ECM 10 checks whether or not the conditions for learning are satisfied (S42). .
  • the ECM 10 checks whether or not the ambient temperature of the sensor is within a predetermined range.
  • step S42 If the ECM 10 determines in step S42 that the conditions are not met, the ECM 10 notifies the tool 2 to that effect, and the tool 2 displays NG items for which the conditions are not met on the screen (S31). When the NG item is displayed on the screen, the operator responds to adjust the condition.
  • step S42 If the ECM 10 determines that the condition is satisfied in step S42, the ECM 10 starts learning (S43) and executes the processing described in FIG. When learning is completed (S44), the ECM 10 notifies the tool 2 that learning has been completed, and the tool 2 displays a screen for confirming that learning has been completed (S32).
  • the ECM 10 stores the first pressure difference and the second pressure difference as learning values and a flag indicating that learning is completed in the EEPROM (S46). Thereafter, the ECM 10 enters a learning prohibited state (S47).
  • the tool 2 transmits an instruction to permit learning to the ECM 10. To do.
  • the ECM 10 transitions to a state in which learning is permitted (S48), and returns to the state in step S41.
  • the learning unit 112 is the difference between the intake pressure detected by the intake pressure sensor 16 and the atmospheric pressure detected by the atmospheric pressure sensor 15 in a predetermined temperature range with the engine 11 of the vehicle 1 stopped.
  • a first pressure difference and a second pressure difference that is a difference between the exhaust pressure detected by the exhaust pressure sensor 17 and the atmospheric pressure detected by the atmospheric pressure sensor 15 in a predetermined temperature range with the engine 11 of the vehicle 1 stopped.
  • the correction unit 113 corrects the intake pressure detected by the intake pressure sensor 16 based on the first pressure difference after the learning unit 112 stores the first pressure difference and the second pressure difference in the storage unit 101. Further, the exhaust pressure detected by the exhaust pressure sensor 17 is corrected based on the second pressure difference.
  • the ECM 10 is used when the accuracy of the intake pressure detected by the intake pressure sensor 16 and the exhaust pressure detected by the exhaust pressure sensor 17 is low due to individual variations of the intake pressure sensor 16 and the exhaust pressure sensor 17. However, it is possible to correct the deviation of the intake pressure and the exhaust pressure caused by the individual variations of the intake pressure sensor 16 and the exhaust pressure sensor 17. As a result, the ECM 10 can calculate the EGR flow rate using highly accurate intake pressure and exhaust pressure, so that appropriate EGR control is realized and deterioration of the NOx value can be suppressed in advance.
  • the learning unit 112 calculates the first pressure difference and the second pressure difference while the ambient temperature of the sensor is in a temperature range in which the accuracy of each sensor is relatively high. In this way, the learning unit 112 can improve the accuracy of detecting individual variations of the intake pressure sensor 16 and the exhaust pressure sensor 17.
  • the learning unit 112 waits until a predetermined time elapses after energization of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17, and then calculates the first pressure difference and the second pressure difference. Store in the storage unit 101. By doing in this way, the learning part 112 can learn using the pressure value after the operation
  • the present disclosure has been described using the embodiment, the technical scope of the present disclosure is not limited to the scope described in the embodiment, and various modifications and changes can be made within the scope of the gist. is there.
  • the specific embodiments of device distribution / integration are not limited to the above-described embodiments, and all or a part of them may be configured to be functionally or physically distributed / integrated in arbitrary units. Can do.
  • new embodiments generated by any combination of a plurality of embodiments are also included in the embodiments of the present disclosure. The effect of the new embodiment produced by the combination has the effect of the original embodiment.
  • the learning device and the learning method of the present disclosure are useful in terms of improving the correction accuracy by the atmospheric pressure sensor of the pressure by the intake pressure sensor and the exhaust pressure sensor in the vehicle.

Abstract

A learning device for learning the error in an intake pressure sensor for detecting the intake pressure of a vehicle and an exhaust pressure sensor for detecting the exhaust pressure of the vehicle, said learning device being equipped with: a pressure acquisition unit for acquiring an atmospheric pressure detected in a prescribed temperature range by an atmospheric pressure sensor, an intake pressure detected in the prescribed temperature range by the intake pressure sensor, and an exhaust pressure detected in the prescribed temperature range by the exhaust pressure sensor, said sensors being provided in the vehicle; and a learning unit for storing, in a storage unit, a first pressure difference, which is a difference between the intake pressure detected by the intake pressure sensor and the atmospheric pressure detected by the atmospheric pressure sensor in the prescribed temperature range while the vehicle engine is stopped, and a second pressure difference, which is a difference between the exhaust pressure detected by the exhaust pressure sensor and the atmospheric pressure detected by the atmospheric pressure sensor in the prescribed temperature range while the vehicle engine is stopped.

Description

学習装置及び学習方法Learning apparatus and learning method
　本開示は、車両の吸気圧センサ及び排気圧センサの個体ばらつきの大きさを学習するための学習装置及び学習方法に関する。 The present disclosure relates to a learning apparatus and a learning method for learning the magnitude of individual variation of an intake pressure sensor and an exhaust pressure sensor of a vehicle.
　従来、大気圧を用いて車両の排気圧の測定値を補正する方法が知られている。特許文献１には、所定の条件下で測定した大気圧を記憶しておき、記憶した大気圧と測定した大気圧との差に基づいて、排気圧の測定値を補正する方法が開示されている。 Conventionally, a method for correcting the measured value of the exhaust pressure of the vehicle using the atmospheric pressure is known. Patent Document 1 discloses a method of storing atmospheric pressure measured under a predetermined condition and correcting a measured value of exhaust pressure based on a difference between the stored atmospheric pressure and the measured atmospheric pressure. Yes.
日本国特開２００６－１６１６２６号公報Japanese Unexamined Patent Publication No. 2006-161626
　従来の方法では、圧力センサの特性が温度によって変化することが考慮されていなかった。大気圧センサの温度特性と排気圧センサの温度特性は異なるので、従来の方法を用いる場合、温度によって補正値が変化する。したがって、従来の方法を用いる場合には、センサの個体ばらつきの影響を補正するための補正値に大気圧センサの温度特性の影響が及んでしまうため、当該補正値の精度は低かった。 In the conventional method, it has not been considered that the characteristics of the pressure sensor change with temperature. Since the temperature characteristic of the atmospheric pressure sensor and the temperature characteristic of the exhaust pressure sensor are different, the correction value varies depending on the temperature when the conventional method is used. Therefore, when the conventional method is used, the correction value for correcting the influence of individual variation of the sensor is affected by the temperature characteristic of the atmospheric pressure sensor, and the accuracy of the correction value is low.
　本開示の目的は、車両における吸気圧センサ及び排気圧センサによる圧力の大気圧センサによる補正精度を向上可能な学習装置及び学習方法を提供することである。 An object of the present disclosure is to provide a learning device and a learning method capable of improving the correction accuracy of the pressure by the atmospheric pressure sensor by the intake pressure sensor and the exhaust pressure sensor in the vehicle.
　本開示の学習装置は、車両の吸気圧を検出する吸気圧センサ、及び前記車両の排気圧を検出する排気圧センサの誤差を学習する学習装置であって、前記車両に設けられている大気圧センサが所定の温度範囲において検出した大気圧、前記吸気圧センサが前記所定の温度範囲において検出した吸気圧、及び前記排気圧センサが前記所定の温度範囲において検出した排気圧を取得する圧力取得部と、前記車両のエンジンが停止した状態で前記所定の温度範囲において前記吸気圧センサが検出した吸気圧と前記大気圧センサが検出した大気圧との差である第１圧力差、及び前記エンジンが停止した状態で前記所定の温度範囲において前記排気圧センサが検出した排気圧と前記大気圧センサが検出した大気圧との差である第２圧力差を記憶部に記憶させる学習部と、前記学習部が前記第１圧力差及び前記第２圧力差を前記記憶部に記憶させた後に、前記吸気圧センサが検出した吸気圧を前記第１圧力差に基づいて補正し、かつ前記排気圧センサが検出した排気圧を前記第２圧力差に基づいて補正する補正部と、を備える。 A learning device according to the present disclosure is a learning device that learns an error of an intake pressure sensor that detects an intake pressure of a vehicle and an exhaust pressure sensor that detects an exhaust pressure of the vehicle, and is an atmospheric pressure provided in the vehicle A pressure acquisition unit that acquires the atmospheric pressure detected by the sensor in the predetermined temperature range, the intake pressure detected by the intake pressure sensor in the predetermined temperature range, and the exhaust pressure detected by the exhaust pressure sensor in the predetermined temperature range. A first pressure difference that is a difference between an intake pressure detected by the intake pressure sensor and an atmospheric pressure detected by the atmospheric pressure sensor in the predetermined temperature range in a state where the engine of the vehicle is stopped, and the engine A second pressure difference that is a difference between the exhaust pressure detected by the exhaust pressure sensor and the atmospheric pressure detected by the atmospheric pressure sensor in the predetermined temperature range in the predetermined temperature range is stored in the storage unit. And a learning unit that stores the first pressure difference and the second pressure difference in the storage unit, and then corrects the intake pressure detected by the intake pressure sensor based on the first pressure difference. And a correction unit that corrects the exhaust pressure detected by the exhaust pressure sensor based on the second pressure difference.
　前記学習部は、前記車両に設けられた温度センサが検出した温度が前記所定の温度範囲の下限値未満である場合に前記車両の前記エンジンを始動させ、前記温度センサが検出した温度が前記所定の温度範囲内に達した後に前記エンジンを停止させた状態での前記第１圧力差及び前記第２圧力差を前記記憶部に記憶させてもよい。 The learning unit starts the engine of the vehicle when a temperature detected by a temperature sensor provided in the vehicle is less than a lower limit value of the predetermined temperature range, and the temperature detected by the temperature sensor is the predetermined temperature. The first pressure difference and the second pressure difference when the engine is stopped after reaching the temperature range may be stored in the storage unit.
　また、前記学習部は、前記大気圧センサ、前記吸気圧センサ及び前記排気圧センサに通電を開始してから、所定の時間が経過するまで待機した後に、前記第１圧力差及び前記第２圧力差を前記記憶部に記憶させてもよい。 The learning unit waits until a predetermined time elapses after energization of the atmospheric pressure sensor, the intake pressure sensor, and the exhaust pressure sensor, and then the first pressure difference and the second pressure. The difference may be stored in the storage unit.
　また、前記学習部は、前記吸気圧センサ、前記排気圧センサ及び前記大気圧センサが故障していないことを確認した後に、前記第１圧力差及び前記第２圧力差を前記記憶部に記憶させてもよい。 In addition, the learning unit stores the first pressure difference and the second pressure difference in the storage unit after confirming that the intake pressure sensor, the exhaust pressure sensor, and the atmospheric pressure sensor have not failed. May be.
　また、前記学習部は、前記所定の時間内に前記吸気圧センサが検出した吸気圧を平滑化した平滑化吸気圧と前記所定の時間内に前記大気圧センサが検出した大気圧を平滑化した平滑化大気圧との差を前記第１圧力差として算出し、かつ前記所定の時間内に前記排気圧センサが検出した排気圧を平滑化した平滑化排気圧と前記平滑化大気圧との差を前記第２圧力差として算出してもよい。 Further, the learning unit smoothes the smoothed intake pressure obtained by smoothing the intake pressure detected by the intake pressure sensor within the predetermined time and the atmospheric pressure detected by the atmospheric pressure sensor within the predetermined time. The difference between the smoothed exhaust pressure and the smoothed atmospheric pressure, which is obtained by calculating the difference from the smoothed atmospheric pressure as the first pressure difference and smoothing the exhaust pressure detected by the exhaust pressure sensor within the predetermined time. May be calculated as the second pressure difference.
　本開示の学習方法は、コンピュータが実行する、車両の吸気圧を検出する吸気圧センサ、及び前記車両の排気圧を検出する排気圧センサの誤差を学習する学習方法であって、前記車両に設けられている大気圧センサが所定の温度範囲において検出した大気圧、前記吸気圧センサが前記所定の温度範囲において検出した吸気圧、及び前記排気圧センサが前記所定の温度範囲において検出した排気圧を取得するステップと、前記車両のエンジンが停止した状態で前記所定の温度範囲において前記吸気圧センサが検出した吸気圧と前記大気圧センサが検出した大気圧との差である第１圧力差、及び前記エンジンが停止した状態で前記所定の温度範囲において前記排気圧センサが検出した排気圧と前記大気圧センサが検出した大気圧との差である第２圧力差を記憶部に記憶させるステップと、前記第１圧力差及び前記第２圧力差を前記記憶部に記憶させた後に、前記吸気圧センサが検出した吸気圧を前記第１圧力差に基づいて補正し、かつ前記排気圧センサが検出した排気圧を前記第２圧力差に基づいて補正するステップと、を備える。 A learning method of the present disclosure is a learning method for learning an error of an intake pressure sensor that detects an intake pressure of a vehicle and an exhaust pressure sensor that detects an exhaust pressure of the vehicle, which is executed by a computer, and is provided in the vehicle The atmospheric pressure detected by the atmospheric pressure sensor in a predetermined temperature range, the intake pressure detected by the intake pressure sensor in the predetermined temperature range, and the exhaust pressure detected by the exhaust pressure sensor in the predetermined temperature range. A first pressure difference that is a difference between an intake pressure detected by the intake pressure sensor and an atmospheric pressure detected by the atmospheric pressure sensor in the predetermined temperature range in a state where the engine of the vehicle is stopped; and The difference between the exhaust pressure detected by the exhaust pressure sensor and the atmospheric pressure detected by the atmospheric pressure sensor in the predetermined temperature range with the engine stopped. Based on the first pressure difference, the step of storing the pressure difference in the storage unit and the intake pressure detected by the intake pressure sensor after storing the first pressure difference and the second pressure difference in the storage unit And correcting the exhaust pressure detected by the exhaust pressure sensor based on the second pressure difference.
　本開示の学習装置及び学習方法によれば、車両における吸気圧センサ及び排気圧センサによる圧力の大気圧センサによる補正精度を向上させることができる。 According to the learning device and the learning method of the present disclosure, it is possible to improve the correction accuracy of the pressure by the atmospheric pressure sensor by the intake pressure sensor and the exhaust pressure sensor in the vehicle.
図１は、車両における吸気系及び排気系の構成を示す図である。FIG. 1 is a diagram showing the configuration of an intake system and an exhaust system in a vehicle. 図２は、ＥＣＭの構成を示す図である。FIG. 2 is a diagram illustrating a configuration of the ECM. 図３は、ＥＣＭの処理の手順を示すフローチャートである。FIG. 3 is a flowchart showing the procedure of ECM processing. 図４は、ツールを用いてＥＣＭによる学習を実施する際の流れを示すシーケンス図である。FIG. 4 is a sequence diagram illustrating a flow when learning by ECM is performed using a tool.
［車両１の概要］
　図１は、本実施形態の車両１における吸気系及び排気系の構成を示す図である。車両１は、車両１の製造者又はディーラーが用いるコンピュータ等により構成されるツール２に接続可能であり、製造者又はディーラーは、ツール２を用いて車両１が有する吸気圧センサ及び排気圧センサの個体ばらつきを補正するための情報を車両１に送信することができる。 [Outline of vehicle 1]
FIG. 1 is a diagram illustrating a configuration of an intake system and an exhaust system in the vehicle 1 of the present embodiment. The vehicle 1 can be connected to a tool 2 configured by a computer or the like used by the manufacturer or dealer of the vehicle 1, and the manufacturer or dealer can use the tool 2 for the intake pressure sensor and the exhaust pressure sensor of the vehicle 1. Information for correcting individual variation can be transmitted to the vehicle 1.
　車両１は、ＥＣＭ（Engine Control Module）１０と、エンジン１１と、ＥＧＲ（Exhaust Gas Recirculation）クーラー１２と、ＥＧＲバルブ１３と、温度センサ１４と、大気圧センサ１５と、吸気圧センサ１６と、排気圧センサ１７とを有する。ＥＣＭ１０は、エンジン１１及びエンジン１１の周辺部品を制御するモジュールであり、例えばＣＰＵ（Central Processing Unit）、ＲＡＭ（Random Access Memory）及びＥＥＰＲＯＭ（Electrically Erasable Programmable Read Only Memory）等を有する。ＥＣＭ１０は、ツール２との間で各種のデータを送受信することができる。ＥＣＭ１０は、ツール２とケーブルを介してデータを送受信してもよく、電波を介してデータを送受信してもよい。 The vehicle 1 includes an ECM (Engine Control Module) 10, an engine 11, an EGR (Exhaust Gas Recirculation) cooler 12, an EGR valve 13, a temperature sensor 14, an atmospheric pressure sensor 15, an intake pressure sensor 16, an exhaust pressure sensor 16. And an atmospheric pressure sensor 17. The ECM 10 is a module that controls the engine 11 and peripheral components of the engine 11, and includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), an EEPROM (Electrically, Erasable Programmable, Read Only Memory), and the like. The ECM 10 can send and receive various data to and from the tool 2. The ECM 10 may transmit and receive data via the tool 2 and a cable, or may transmit and receive data via radio waves.
　ＥＣＭ１０は、排気圧センサ１７が検出した排気圧と吸気圧センサ１６が検出した吸気圧との比に基づいてＥＧＲ流量を算出する。また、ＥＣＭ１０は、算出したＥＧＲ流量に対応する酸素濃度が所定の範囲内になるようにＥＧＲバルブ１３を制御する。詳細については後述するが、ＥＣＭ１０は、吸気圧センサ１６及び排気圧センサ１７の個体ばらつきにより生じるＥＧＲ流量の算出誤差を抑制するために、所定の温度範囲において大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７が検出した大気圧に基づいて、吸気圧センサ１６が検出した吸気圧及び排気圧センサ１７が検出した排気圧を補正するための補正値を学習する学習装置として機能する。 The ECM 10 calculates the EGR flow rate based on the ratio between the exhaust pressure detected by the exhaust pressure sensor 17 and the intake pressure detected by the intake pressure sensor 16. Further, the ECM 10 controls the EGR valve 13 so that the oxygen concentration corresponding to the calculated EGR flow rate is within a predetermined range. Although details will be described later, the ECM 10 controls the atmospheric pressure sensor 15, the intake pressure sensor 16, and the Based on the atmospheric pressure detected by the exhaust pressure sensor 17, it functions as a learning device that learns a correction value for correcting the intake pressure detected by the intake pressure sensor 16 and the exhaust pressure detected by the exhaust pressure sensor 17.
　エンジン１１は、車両１を駆動するための動力を発生する。エンジン１１から排出される排気の一部はＥＧＲクーラー１２へと送られる。ＥＧＲクーラー１２は、エンジン１１から送られた排気を冷却してからエンジン１１に戻す。 The engine 11 generates power for driving the vehicle 1. Part of the exhaust discharged from the engine 11 is sent to the EGR cooler 12. The EGR cooler 12 cools the exhaust sent from the engine 11 and then returns it to the engine 11.
　ＥＧＲバルブ１３は、エンジン１１からＥＧＲクーラー１２に送られる排気の量を調整するためのバルブである。ＥＧＲバルブ１３は、ＥＣＭ１０の制御に基づいて、エンジン１１からＥＧＲクーラー１２に送られる排気の量を調整する。 The EGR valve 13 is a valve for adjusting the amount of exhaust sent from the engine 11 to the EGR cooler 12. The EGR valve 13 adjusts the amount of exhaust sent from the engine 11 to the EGR cooler 12 based on the control of the ECM 10.
　温度センサ１４は、吸気圧センサ１６及び排気圧センサ１７の周辺の温度（以下、周辺温度という場合がある）を検出する温度検出部である。温度センサ１４は、検出した温度をＥＣＭ１０に通知する。図１においては車両１が１個の温度センサ１４を有する例を示しているが、車両１は、吸気圧センサ１６及び排気圧センサ１７の近傍に設けられた複数の温度センサ１４を有していてもよい。 The temperature sensor 14 is a temperature detection unit that detects the temperature around the intake pressure sensor 16 and the exhaust pressure sensor 17 (hereinafter also referred to as ambient temperature). The temperature sensor 14 notifies the detected temperature to the ECM 10. Although FIG. 1 shows an example in which the vehicle 1 has one temperature sensor 14, the vehicle 1 has a plurality of temperature sensors 14 provided in the vicinity of the intake pressure sensor 16 and the exhaust pressure sensor 17. May be.
　大気圧センサ１５は、大気圧を検出する圧力センサである。大気圧センサ１５は車両の任意の場所に設けられていてよく、例えばエンジン１１の近傍に設けられている。大気圧センサ１５は、検出した大気圧をＥＣＭ１０に通知する。 The atmospheric pressure sensor 15 is a pressure sensor that detects atmospheric pressure. The atmospheric pressure sensor 15 may be provided at an arbitrary location of the vehicle, for example, in the vicinity of the engine 11. The atmospheric pressure sensor 15 notifies the ECM 10 of the detected atmospheric pressure.
　吸気圧センサ１６は、インタークーラー（不図示）を介してエンジン１１に流入する空気の圧力を検出する圧力センサである。吸気圧センサ１６は、例えば過給機（不図示）によりエンジン１１に送り込まれる圧縮空気の圧力であるブースト圧を吸気圧として検出する。吸気圧センサ１６は、インタークーラーとエンジン１１との間の配管に設けられている。吸気圧センサ１６は、検出した吸気圧をＥＣＭ１０に通知する。 The intake pressure sensor 16 is a pressure sensor that detects the pressure of air flowing into the engine 11 via an intercooler (not shown). The intake pressure sensor 16 detects, for example, a boost pressure, which is a pressure of compressed air sent to the engine 11 by a supercharger (not shown), as the intake pressure. The intake pressure sensor 16 is provided in a pipe between the intercooler and the engine 11. The intake pressure sensor 16 notifies the ECM 10 of the detected intake pressure.
　排気圧センサ１７は、エンジン１１からＥＧＲクーラー１２へと送られる排気の圧力を検出する圧力センサである。排気圧センサ１７は、エンジン１１とＥＧＲクーラー１２との間の配管に設けられている。排気圧センサ１７は、検出した排気圧をＥＣＭ１０に通知する。 The exhaust pressure sensor 17 is a pressure sensor that detects the pressure of exhaust gas sent from the engine 11 to the EGR cooler 12. The exhaust pressure sensor 17 is provided in a pipe between the engine 11 and the EGR cooler 12. The exhaust pressure sensor 17 notifies the detected exhaust pressure to the ECM 10.
［センサの精度特性］
　大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７は、それぞれ圧力及び周辺温度によってばらつき幅が異なる場合があることが想定される。そこで、本実施の形態に係るＥＣＭ１０は、大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７の個体バラつき幅が小さい温度の範囲において大気圧センサ１５が検出した圧力に基づいて吸気圧センサ１６及び排気圧センサ１７が検出した圧力の偏差を学習する。ＥＣＭ１０は、学習が完了した後に、学習した偏差を用いて吸気圧センサ１６及び排気圧センサ１７が検出した圧力を補正することにより、吸気圧センサ１６及び排気圧センサ１７のばらつきの影響を抑制する。 [Accuracy characteristics of sensor]
It is assumed that the variation ranges of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 may vary depending on the pressure and the ambient temperature. Therefore, the ECM 10 according to the present embodiment includes the intake pressure sensor 16 based on the pressure detected by the atmospheric pressure sensor 15 in the temperature range where the individual variation widths of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 are small. And the deviation of the pressure detected by the exhaust pressure sensor 17 is learned. After the learning is completed, the ECM 10 corrects the pressure detected by the intake pressure sensor 16 and the exhaust pressure sensor 17 using the learned deviation, thereby suppressing the influence of variations in the intake pressure sensor 16 and the exhaust pressure sensor 17. .
［ＥＣＭ１０の構成］
　図２は、ＥＣＭ１０の構成を示す図である。ＥＣＭ１０は、記憶部１０１及び制御部１０２を有する。 [Configuration of ECM10]
FIG. 2 is a diagram illustrating the configuration of the ECM 10. The ECM 10 includes a storage unit 101 and a control unit 102.
　記憶部１０１は、ＥＥＰＲＯＭ及びＲＡＭを有する。記憶部１０１は、制御部１０２が実行するプログラムを記憶する。また、記憶部１０１は、後述する学習部１１２が学習することにより決定した、吸気圧センサ１６が検出した吸気圧及び排気圧センサ１７が検出した排気圧の偏差に対応する補正値を学習値として記憶する。 The storage unit 101 includes an EEPROM and a RAM. The storage unit 101 stores a program executed by the control unit 102. Further, the storage unit 101 uses, as a learning value, a correction value corresponding to a deviation between the intake pressure detected by the intake pressure sensor 16 and the exhaust pressure detected by the exhaust pressure sensor 17 determined by learning by the learning unit 112 described later. Remember.
　制御部１０２は、記憶部１０１に記憶されたプログラムを実行することにより、圧力取得部１１１、学習部１１２及び補正部１１３として機能する。 The control unit 102 functions as a pressure acquisition unit 111, a learning unit 112, and a correction unit 113 by executing a program stored in the storage unit 101.
　圧力取得部１１１は、車両１に設けられている大気圧センサ１５が所定の温度範囲において検出した大気圧、吸気圧センサ１６が所定の温度範囲において検出した吸気圧、及び排気圧センサ１７が所定の温度範囲において検出した排気圧を取得する。所定の温度範囲は、大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７のばらつき幅が比較的小さい温度範囲である。圧力取得部１１１は、取得した大気圧、吸気圧及び排気圧を学習部１１２に通知する。また、圧力取得部１１１は、取得した吸気圧及び排気圧を補正部１１３に通知する。 The pressure acquisition unit 111 includes an atmospheric pressure detected by the atmospheric pressure sensor 15 provided in the vehicle 1 in a predetermined temperature range, an intake pressure detected by the intake pressure sensor 16 in a predetermined temperature range, and an exhaust pressure sensor 17 determined by the predetermined pressure range. The exhaust pressure detected in the temperature range is acquired. The predetermined temperature range is a temperature range in which the variation ranges of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 are relatively small. The pressure acquisition unit 111 notifies the learning unit 112 of the acquired atmospheric pressure, intake pressure, and exhaust pressure. Further, the pressure acquisition unit 111 notifies the correction unit 113 of the acquired intake pressure and exhaust pressure.
　学習部１１２は、エンジン１１が停止した状態で所定の温度範囲において吸気圧センサ１６が検出した吸気圧と大気圧センサ１５が検出した大気圧との差である第１圧力差を、吸気圧センサ１６が検出する吸気圧の偏差に対応する学習値として記憶部１０１に記憶させる。また、学習部１１２は、エンジン１１が停止した状態で所定の温度範囲において排気圧センサ１７が検出した排気圧と大気圧センサ１５が検出した大気圧との差である第２圧力差を、排気圧センサ１７が検出する排気圧の偏差に対応する学習値として記憶部１０１に記憶させる。 The learning unit 112 obtains a first pressure difference that is a difference between the intake pressure detected by the intake pressure sensor 16 and the atmospheric pressure detected by the atmospheric pressure sensor 15 in a predetermined temperature range with the engine 11 stopped. The stored value is stored in the storage unit 101 as a learning value corresponding to the deviation of the intake pressure detected by 16. The learning unit 112 also discharges a second pressure difference, which is a difference between the exhaust pressure detected by the exhaust pressure sensor 17 and the atmospheric pressure detected by the atmospheric pressure sensor 15 in a predetermined temperature range with the engine 11 stopped. The learning unit 101 stores the learned value corresponding to the deviation of the exhaust pressure detected by the atmospheric pressure sensor 17.
　エンジン１１が停止した状態では、理想的には、大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７が検出する圧力は、全て同一である。学習部１１２が算出した第１圧力差が０でない場合、大気圧センサ１５の偏差が十分に小さいと仮定すると、第１圧力差は吸気圧センサ１６のばらつきに起因すると考えられる。同様に、学習部１１２が算出した第２圧力差が０でない場合、大気圧センサ１５の偏差が十分に小さいと仮定すると、第２圧力差は排気圧センサ１７のばらつきに起因すると考えられる。 In a state where the engine 11 is stopped, ideally, the pressures detected by the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 are all the same. When the first pressure difference calculated by the learning unit 112 is not 0, it is considered that the first pressure difference is caused by variations in the intake pressure sensor 16 on the assumption that the deviation of the atmospheric pressure sensor 15 is sufficiently small. Similarly, when the second pressure difference calculated by the learning unit 112 is not zero, it is considered that the second pressure difference is caused by variations in the exhaust pressure sensor 17 on the assumption that the deviation of the atmospheric pressure sensor 15 is sufficiently small.
　学習部１１２は、所定の温度範囲で学習を行うために、車両１に設けられた温度センサ１４が検出した温度が所定の温度範囲の下限値未満である場合に車両１のエンジン１１を始動させる。その後、学習部１１２は、温度センサ１４が検出した温度が所定の温度範囲内に達した後にエンジン１１を停止させた状態での第１圧力差及び第２圧力差を記憶部１０１に記憶させる。このようにすることで、学習部１１２は、大気圧センサ１５が高い精度で検出した大気圧と、吸気圧センサ１６が検出した大気圧及び排気圧センサ１７が検出した大気圧とを比較できるので、吸気圧センサ１６及び排気圧センサ１７の偏差を高い精度で学習できる。 The learning unit 112 starts the engine 11 of the vehicle 1 when the temperature detected by the temperature sensor 14 provided in the vehicle 1 is less than the lower limit value of the predetermined temperature range in order to perform learning in the predetermined temperature range. . Thereafter, the learning unit 112 causes the storage unit 101 to store the first pressure difference and the second pressure difference in a state where the engine 11 is stopped after the temperature detected by the temperature sensor 14 has reached a predetermined temperature range. By doing so, the learning unit 112 can compare the atmospheric pressure detected by the atmospheric pressure sensor 15 with high accuracy with the atmospheric pressure detected by the intake pressure sensor 16 and the atmospheric pressure detected by the exhaust pressure sensor 17. The deviation between the intake pressure sensor 16 and the exhaust pressure sensor 17 can be learned with high accuracy.
　例えば、大気圧センサ１５が検出した大気圧が１０１．３３ｋＰａであり、吸気圧センサ１６が検出した大気圧が１０３．５０ｋＰａである場合、学習部１１２は、第１圧力差が２．１７ｋＰａであるとする。また、排気圧センサ１７が検出した大気圧が１００．２０ｋＰａである場合、学習部１１２は、第２圧力差が－１．１３ｋＰａであるとする。 For example, when the atmospheric pressure detected by the atmospheric pressure sensor 15 is 101.33 kPa and the atmospheric pressure detected by the intake pressure sensor 16 is 103.50 kPa, the learning unit 112 has a first pressure difference of 2.17 kPa. And When the atmospheric pressure detected by the exhaust pressure sensor 17 is 100.20 kPa, the learning unit 112 assumes that the second pressure difference is −1.13 kPa.
　補正部１１３は、学習部１１２が第１圧力差及び第２圧力差を記憶部１０１に記憶させた後に、吸気圧センサ１６が検出した吸気圧を第１圧力差に基づいて補正する。また、補正部１１３は、排気圧センサ１７が検出した排気圧を第２圧力差に基づいて補正する。例えば、第１圧力差が２．１７ｋＰａであり、吸気圧センサ１６が検出した吸気圧が１２０．０ｋＰａである場合、補正部１１３は、補正後の吸気圧を１１７．８３ｋＰａと算出する。第２圧力差が－１．１３ｋＰａであり、排気圧センサ１７が検出した排気圧が１００．０ｋＰａである場合、補正部１１３は、補正後の排気圧を１０１．１３ｋＰａと算出する。 The correction unit 113 corrects the intake pressure detected by the intake pressure sensor 16 based on the first pressure difference after the learning unit 112 stores the first pressure difference and the second pressure difference in the storage unit 101. Further, the correction unit 113 corrects the exhaust pressure detected by the exhaust pressure sensor 17 based on the second pressure difference. For example, when the first pressure difference is 2.17 kPa and the intake pressure detected by the intake pressure sensor 16 is 120.0 kPa, the correction unit 113 calculates the corrected intake pressure as 117.83 kPa. When the second pressure difference is −1.13 kPa and the exhaust pressure detected by the exhaust pressure sensor 17 is 100.0 kPa, the correction unit 113 calculates the corrected exhaust pressure as 101.13 kPa.
［ＥＣＭ１０の処理フローチャート］
　図３は、ＥＣＭ１０の処理の手順を示すフローチャートである。図３に示すフローチャートはまず、学習部１１２は記憶部１０１を参照し、既に学習が行われているかどうかを確認する（Ｓ１１）。学習部１１２は、既に学習が行われていると判定すると（Ｓ１１においてＹｅｓ）、図３に示すフローチャートの処理を終了する。 [Processing flowchart of ECM10]
FIG. 3 is a flowchart showing the processing procedure of the ECM 10. In the flowchart shown in FIG. 3, first, the learning unit 112 refers to the storage unit 101 to check whether learning has already been performed (S11). If the learning unit 112 determines that learning has already been performed (Yes in S11), the process of the flowchart illustrated in FIG.
　学習部１１２は、学習が行われていないと判定すると（Ｓ１１においてＮｏ）、学習の処理を開始してステップＳ１２に進む。ステップＳ１２において、学習部１１２は、温度センサ１４が検出した温度が所定の温度範囲に入っているか否かを判定する（Ｓ１２）。学習部１１２は、温度が所定の温度範囲よりも低い場合（Ｓ１２においてＮｏ）、例えば作業者の操作に基づいてエンジン１１を始動して暖機を開始する（Ｓ１３）。学習部１１２は、温度センサ１４が検出した温度が所定の温度範囲に入るまで待機する。 If the learning unit 112 determines that learning has not been performed (No in S11), the learning unit 112 starts learning processing and proceeds to step S12. In step S12, the learning unit 112 determines whether or not the temperature detected by the temperature sensor 14 is within a predetermined temperature range (S12). If the temperature is lower than the predetermined temperature range (No in S12), the learning unit 112 starts the engine 11 based on, for example, an operator's operation and starts warming up (S13). The learning unit 112 waits until the temperature detected by the temperature sensor 14 enters a predetermined temperature range.
　学習部１１２は、温度センサ１４が検出した温度が所定の温度範囲に入っていると判定すると（Ｓ１２においてＹｅｓ）、作業者の操作に基づいて、エンジン１１を停止する（Ｓ１４）。なお、学習部１１２は、エンジン１１が停止している場合、ステップＳ１４を実行することなくステップＳ１５に処理を進める。 If the learning unit 112 determines that the temperature detected by the temperature sensor 14 is within the predetermined temperature range (Yes in S12), the learning unit 112 stops the engine 11 based on the operator's operation (S14). In addition, the learning part 112 advances a process to step S15, without performing step S14, when the engine 11 has stopped.
　ステップＳ１５において、学習部１１２は、イグニッションキーがオン状態になっているか否かを判定し（Ｓ１５）、イグニッションキーがオン状態になっていない場合（Ｓ１５においてＮｏ）、イグニッションキーがオン状態になるまで待機する。学習部１１２は、イグニッションキーがオン状態になったと判定すると（Ｓ１５においてＹｅｓ）、所定の時間（例えば６秒間）が経過したかどうかを監視する（Ｓ１６）。 In step S15, the learning unit 112 determines whether or not the ignition key is turned on (S15). If the ignition key is not turned on (No in S15), the ignition key is turned on. Wait until. If the learning unit 112 determines that the ignition key has been turned on (Yes in S15), the learning unit 112 monitors whether a predetermined time (for example, 6 seconds) has elapsed (S16).
　このように、学習部１１２は、大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７に通電を開始してから所定の時間が経過するまで待機している間に、圧力取得部１１１を介して大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７が検出した大気圧、吸気圧及び排気圧を取得する（Ｓ１７）。学習部１１２は、所定の時間内に取得した大気圧、吸気圧及び排気圧をそれぞれ平滑化する。学習部１１２は、例えば、所定の時間内に圧力取得部１１１が大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７から取得した大気圧、吸気圧及び排気圧のそれぞれの平均値を算出することにより、平滑化大気圧、平滑化吸気圧及び平滑化排気圧を算出する。 As described above, the learning unit 112 is connected to the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 through the pressure acquisition unit 111 while waiting for a predetermined time after starting energization. Then, the atmospheric pressure, the intake pressure and the exhaust pressure detected by the atmospheric pressure sensor 15, the intake pressure sensor 16 and the exhaust pressure sensor 17 are acquired (S17). The learning unit 112 smoothes the atmospheric pressure, the intake pressure, and the exhaust pressure acquired within a predetermined time. The learning unit 112 calculates, for example, the average values of the atmospheric pressure, the intake pressure, and the exhaust pressure acquired by the pressure acquisition unit 111 from the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 within a predetermined time. Thus, the smoothed atmospheric pressure, the smoothed intake pressure and the smoothed exhaust pressure are calculated.
　また、学習部１１２は、大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７のいずれかが故障していないか否かを判定する（Ｓ１８）。学習部１１２は、例えば圧力取得部１１１が取得した大気圧、吸気圧及び排気圧のいずれかの値の変動量が所定の閾値より大きかったり、大気圧、吸気圧及び排気圧のいずれかの値が異常値を示していたりする場合に、大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７のいずれかが故障していると判定する。 Further, the learning unit 112 determines whether any one of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 has failed (S18). The learning unit 112, for example, has a fluctuation amount of any one of the atmospheric pressure, the intake pressure, and the exhaust pressure acquired by the pressure acquisition unit 111 larger than a predetermined threshold value, or any value of the atmospheric pressure, the intake pressure, and the exhaust pressure. Is an abnormal value, it is determined that any one of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 has failed.
　学習部１１２は、ステップＳ１８において故障が発生していないことを確認してから、第１圧力差及び第２圧力差（差分値）を算出する。すなわち、学習部１１２は、大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７のいずれにも故障が発生していないと判定してから（Ｓ１８においてＮｏ）、ステップＳ１９に進んで、吸気圧センサ１６が検出した吸気圧を平滑化した平滑化吸気圧と大気圧センサ１５が検出した大気圧を平滑化した平滑化大気圧との差分値を第１圧力差として算出する。また、学習部１１２は、排気圧センサ１７が検出した排気圧を平滑化した平滑化排気圧と平滑化大気圧との差分値を第２圧力差として算出する。 The learning unit 112 calculates the first pressure difference and the second pressure difference (difference value) after confirming that no failure has occurred in step S18. That is, the learning unit 112 determines that no failure has occurred in any of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 (No in S18), and then proceeds to step S19 to determine the intake pressure. A difference value between a smoothed intake pressure obtained by smoothing the intake pressure detected by the sensor 16 and a smoothed atmospheric pressure obtained by smoothing the atmospheric pressure detected by the atmospheric pressure sensor 15 is calculated as a first pressure difference. Further, the learning unit 112 calculates a difference value between the smoothed exhaust pressure obtained by smoothing the exhaust pressure detected by the exhaust pressure sensor 17 and the smoothed atmospheric pressure as the second pressure difference.
　続いて、学習部１１２は、算出した第１圧力差及び第２圧力差を学習値として記憶部１０１に記憶させる（Ｓ２０）。これにより、学習部１１２は学習を完了し、学習が完了したことをツール２に通知する。
　なお、ステップＳ１８において、学習部１１２が大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７のいずれかが故障していると判定した場合（Ｓ１８においてＹｅｓ）、学習部１１２は、ツール２に故障が発生したことを通知するエラーメッセージを出力する（Ｓ２１）。 Subsequently, the learning unit 112 causes the storage unit 101 to store the calculated first pressure difference and second pressure difference as learning values (S20). Thereby, the learning unit 112 completes the learning and notifies the tool 2 that the learning is completed.
In step S18, when the learning unit 112 determines that any one of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17 has failed (Yes in S18), the learning unit 112 sets the tool 2 to An error message notifying that a failure has occurred is output (S21).
［ツール２による学習制御］
　図４は、ツール２を用いてＥＣＭ１０による学習を実施する際の流れを示すシーケンス図である。
　学習が完了していない状態でイグニッションキーがオン状態になり車両１の各部への通電が開始すると（Ｓ４１）、ＥＣＭ１０においては、学習のための条件が整っているか否かを確認する（Ｓ４２）。ＥＣＭ１０は、例えば学習のための条件として、センサの周辺温度が所定の範囲内であるか否かを確認する。 [Learning control by Tool 2]
FIG. 4 is a sequence diagram illustrating a flow when learning by the ECM 10 is performed using the tool 2.
When the ignition key is turned on in a state where learning is not completed and energization of each part of the vehicle 1 is started (S41), the ECM 10 checks whether or not the conditions for learning are satisfied (S42). . For example, as a condition for learning, the ECM 10 checks whether or not the ambient temperature of the sensor is within a predetermined range.
　ＥＣＭ１０は、ステップＳ４２において条件が整っていないと判定した場合、その旨をツール２に通知し、ツール２は、条件が整っていないＮＧ項目を画面に表示する（Ｓ３１）。作業者は、ＮＧ項目が画面に表示された場合、条件を整えるべく対応する。 If the ECM 10 determines in step S42 that the conditions are not met, the ECM 10 notifies the tool 2 to that effect, and the tool 2 displays NG items for which the conditions are not met on the screen (S31). When the NG item is displayed on the screen, the operator responds to adjust the condition.
　ＥＣＭ１０は、ステップＳ４２において条件が整っていると判定した場合、学習を開始し（Ｓ４３）、図３において説明した処理を実行する。ＥＣＭ１０は、学習が完了すると（Ｓ４４）、ツール２に対して学習が完了したことを通知し、ツール２は、学習が完了したことを確認するための画面を表示する（Ｓ３２）。 If the ECM 10 determines that the condition is satisfied in step S42, the ECM 10 starts learning (S43) and executes the processing described in FIG. When learning is completed (S44), the ECM 10 notifies the tool 2 that learning has been completed, and the tool 2 displays a screen for confirming that learning has been completed (S32).
　続いて、イグニッションキーがオフ状態になると（Ｓ４５）、ＥＣＭ１０は、第１圧力差及び第２圧力差を学習値、並びに学習が完了したことを示すフラグをＥＥＰＲＯＭに記憶させる（Ｓ４６）。その後、ＥＣＭ１０は、学習禁止状態となる（Ｓ４７）。 Subsequently, when the ignition key is turned off (S45), the ECM 10 stores the first pressure difference and the second pressure difference as learning values and a flag indicating that learning is completed in the EEPROM (S46). Thereafter, the ECM 10 enters a learning prohibited state (S47).
　学習禁止状態になっている間であっても、作業者が、ツール２において学習禁止状態を解除するための指示を入力すると（Ｓ３３）、ツール２はＥＣＭ１０に対して学習を許可する指示を送信する。ＥＣＭ１０は、指示を受信すると学習を許可する状態に遷移し（Ｓ４８）、ステップＳ４１の状態に戻る。 Even during the learning prohibited state, when the operator inputs an instruction for canceling the learning prohibited state in the tool 2 (S33), the tool 2 transmits an instruction to permit learning to the ECM 10. To do. When receiving the instruction, the ECM 10 transitions to a state in which learning is permitted (S48), and returns to the state in step S41.
［本実施形態のＥＣＭ１０による効果］
　以上説明したように、学習部１１２は、車両１のエンジン１１が停止した状態で所定の温度範囲において吸気圧センサ１６が検出した吸気圧と大気圧センサ１５が検出した大気圧との差である第１圧力差、及び車両１のエンジン１１が停止した状態で所定の温度範囲において排気圧センサ１７が検出した排気圧と大気圧センサ１５が検出した大気圧との差である第２圧力差を記憶部１０１に記憶させる。その後、補正部１１３は、学習部１１２が第１圧力差及び第２圧力差を記憶部１０１に記憶させた後に、吸気圧センサ１６が検出した吸気圧を第１圧力差に基づいて補正し、かつ排気圧センサ１７が検出した排気圧を第２圧力差に基づいて補正する。 [Effects of ECM 10 of this embodiment]
As described above, the learning unit 112 is the difference between the intake pressure detected by the intake pressure sensor 16 and the atmospheric pressure detected by the atmospheric pressure sensor 15 in a predetermined temperature range with the engine 11 of the vehicle 1 stopped. A first pressure difference and a second pressure difference that is a difference between the exhaust pressure detected by the exhaust pressure sensor 17 and the atmospheric pressure detected by the atmospheric pressure sensor 15 in a predetermined temperature range with the engine 11 of the vehicle 1 stopped. Store in the storage unit 101. Thereafter, the correction unit 113 corrects the intake pressure detected by the intake pressure sensor 16 based on the first pressure difference after the learning unit 112 stores the first pressure difference and the second pressure difference in the storage unit 101. Further, the exhaust pressure detected by the exhaust pressure sensor 17 is corrected based on the second pressure difference.
　このようにすることで、ＥＣＭ１０は、吸気圧センサ１６及び排気圧センサ１７の個体ばらつきにより吸気圧センサ１６が検出する吸気圧、及び排気圧センサ１７が検出する排気圧の精度が低い場合であっても、吸気圧センサ１６及び排気圧センサ１７の個体ばらつきの影響で生じる吸気圧及び排気圧の偏差を補正することができる。その結果、ＥＣＭ１０は、高い精度の吸気圧及び排気圧を用いてＥＧＲ流量を算出できるので適切なＥＧＲ制御が実現され、ＮＯｘ値の悪化を未然に抑制することができる。 By doing so, the ECM 10 is used when the accuracy of the intake pressure detected by the intake pressure sensor 16 and the exhaust pressure detected by the exhaust pressure sensor 17 is low due to individual variations of the intake pressure sensor 16 and the exhaust pressure sensor 17. However, it is possible to correct the deviation of the intake pressure and the exhaust pressure caused by the individual variations of the intake pressure sensor 16 and the exhaust pressure sensor 17. As a result, the ECM 10 can calculate the EGR flow rate using highly accurate intake pressure and exhaust pressure, so that appropriate EGR control is realized and deterioration of the NOx value can be suppressed in advance.
　また、学習部１１２は、センサの周辺温度が、各センサの精度が比較的高い温度範囲である間に第１圧力差及び第２圧力差を算出する。このようにすることで、学習部１１２は、吸気圧センサ１６及び排気圧センサ１７の個体ばらつきの検出精度を向上させることができる。 Also, the learning unit 112 calculates the first pressure difference and the second pressure difference while the ambient temperature of the sensor is in a temperature range in which the accuracy of each sensor is relatively high. In this way, the learning unit 112 can improve the accuracy of detecting individual variations of the intake pressure sensor 16 and the exhaust pressure sensor 17.
　また、学習部１１２は、大気圧センサ１５、吸気圧センサ１６及び排気圧センサ１７に通電を開始してから、所定の時間が経過するまで待機した後に、第１圧力差及び第２圧力差を記憶部１０１に記憶させる。このようにすることで、学習部１１２は、各センサの動作が安定した後の圧力値を用いて学習することができる。また、学習部１１２は、待機している間の圧力値を平滑化することもできる。このようにすることで、学習部１１２は、吸気圧センサ１６及び排気圧センサ１７の個体ばらつきの検出精度をさらに向上させることができる。 In addition, the learning unit 112 waits until a predetermined time elapses after energization of the atmospheric pressure sensor 15, the intake pressure sensor 16, and the exhaust pressure sensor 17, and then calculates the first pressure difference and the second pressure difference. Store in the storage unit 101. By doing in this way, the learning part 112 can learn using the pressure value after the operation | movement of each sensor was stabilized. The learning unit 112 can also smooth the pressure value during standby. By doing so, the learning unit 112 can further improve the detection accuracy of the individual variations of the intake pressure sensor 16 and the exhaust pressure sensor 17.
　以上、本開示を実施の形態を用いて説明したが、本開示の技術的範囲は上記実施の形態に記載の範囲には限定されず、その要旨の範囲内で種々の変形及び変更が可能である。例えば、装置の分散・統合の具体的な実施の形態は、以上の実施の形態に限られず、その全部又は一部について、任意の単位で機能的又は物理的に分散・統合して構成することができる。また、複数の実施の形態の任意の組み合わせによって生じる新たな実施の形態も、本開示の実施の形態に含まれる。組み合わせによって生じる新たな実施の形態の効果は、もとの実施の形態の効果を合わせ持つ。 Although the present disclosure has been described using the embodiment, the technical scope of the present disclosure is not limited to the scope described in the embodiment, and various modifications and changes can be made within the scope of the gist. is there. For example, the specific embodiments of device distribution / integration are not limited to the above-described embodiments, and all or a part of them may be configured to be functionally or physically distributed / integrated in arbitrary units. Can do. In addition, new embodiments generated by any combination of a plurality of embodiments are also included in the embodiments of the present disclosure. The effect of the new embodiment produced by the combination has the effect of the original embodiment.
　本出願は、2017年5月11日付で出願された日本国特許出願（特願2017-094513）に基づくものであり、その内容はここに参照として取り込まれる。 This application is based on a Japanese patent application filed on May 11, 2017 (Japanese Patent Application No. 2017-094513), the contents of which are incorporated herein by reference.
　本開示の学習装置及び学習方法は、車両における吸気圧センサ及び排気圧センサによる圧力の大気圧センサによる補正精度の向上という点において有用である。 The learning device and the learning method of the present disclosure are useful in terms of improving the correction accuracy by the atmospheric pressure sensor of the pressure by the intake pressure sensor and the exhaust pressure sensor in the vehicle.
１　車両
２　ツール
１１　エンジン
１２　ＥＧＲクーラー
１３　ＥＧＲバルブ
１４　温度センサ
１５　大気圧センサ
１６　吸気圧センサ
１７　排気圧センサ
１０１　記憶部
１０２　制御部
１１１　圧力取得部
１１２　学習部
１１３　補正部 DESCRIPTION OF SYMBOLS 1 Vehicle 2 Tool 11 Engine 12 EGR cooler 13 EGR valve 14 Temperature sensor 15 Atmospheric pressure sensor 16 Intake pressure sensor 17 Exhaust pressure sensor 101 Storage part 102 Control part 111 Pressure acquisition part 112 Learning part 113 Correction part

Claims (6)

  1. 　車両の吸気圧を検出する吸気圧センサ、及び前記車両の排気圧を検出する排気圧センサの誤差を学習する学習装置であって、
    　前記車両に設けられている大気圧センサが所定の温度範囲において検出した大気圧、前記吸気圧センサが前記所定の温度範囲において検出した吸気圧、及び前記排気圧センサが前記所定の温度範囲において検出した排気圧を取得する圧力取得部と、
    　前記車両のエンジンが停止した状態で前記所定の温度範囲において前記吸気圧センサが検出した吸気圧と前記大気圧センサが検出した大気圧との差である第１圧力差、及び前記エンジンが停止した状態で前記所定の温度範囲において前記排気圧センサが検出した排気圧と前記大気圧センサが検出した大気圧との差である第２圧力差を記憶部に記憶させる学習部と、
    　前記学習部が前記第１圧力差及び前記第２圧力差を前記記憶部に記憶させた後に、前記吸気圧センサが検出した吸気圧を前記第１圧力差に基づいて補正し、かつ前記排気圧センサが検出した排気圧を前記第２圧力差に基づいて補正する補正部と、
    　を備える学習装置。     A learning device for learning an error of an intake pressure sensor for detecting an intake pressure of a vehicle and an exhaust pressure sensor for detecting an exhaust pressure of the vehicle,
    The atmospheric pressure detected by the atmospheric pressure sensor provided in the vehicle in a predetermined temperature range, the intake pressure detected by the intake pressure sensor in the predetermined temperature range, and the exhaust pressure sensor detected in the predetermined temperature range A pressure acquisition unit for acquiring the exhaust pressure,
    A first pressure difference that is a difference between an intake pressure detected by the intake pressure sensor and an atmospheric pressure detected by the atmospheric pressure sensor in the predetermined temperature range with the vehicle engine stopped, and the engine stopped A learning unit that stores a second pressure difference, which is a difference between the exhaust pressure detected by the exhaust pressure sensor and the atmospheric pressure detected by the atmospheric pressure sensor in the predetermined temperature range in a state, in a storage unit;
    After the learning unit stores the first pressure difference and the second pressure difference in the storage unit, the intake pressure detected by the intake pressure sensor is corrected based on the first pressure difference, and the exhaust pressure is increased. A correction unit for correcting the exhaust pressure detected by the sensor based on the second pressure difference;
    A learning apparatus comprising:
  2. 　前記学習部は、前記車両に設けられた温度センサが検出した温度が前記所定の温度範囲の下限値未満である場合に前記車両の前記エンジンを始動させ、前記温度センサが検出した温度が前記所定の温度範囲内に達した後に前記エンジンを停止させた状態での前記第１圧力差及び前記第２圧力差を前記記憶部に記憶させる、
    　請求項１に記載の学習装置。     The learning unit starts the engine of the vehicle when a temperature detected by a temperature sensor provided in the vehicle is less than a lower limit value of the predetermined temperature range, and the temperature detected by the temperature sensor is the predetermined temperature. Storing the first pressure difference and the second pressure difference in a state where the engine is stopped after reaching the temperature range in the storage unit,
    The learning device according to claim 1.
  3. 　前記学習部は、前記大気圧センサ、前記吸気圧センサ及び前記排気圧センサに通電を開始してから、所定の時間が経過するまで待機した後に、前記第１圧力差及び前記第２圧力差を前記記憶部に記憶させる、
    　請求項１又は２に記載の学習装置。     The learning unit waits until a predetermined time elapses after energization of the atmospheric pressure sensor, the intake pressure sensor, and the exhaust pressure sensor, and then calculates the first pressure difference and the second pressure difference. Storing in the storage unit;
    The learning device according to claim 1 or 2.
  4. 　前記学習部は、前記吸気圧センサ、前記排気圧センサ及び前記大気圧センサが故障していないことを確認した後に、前記第１圧力差及び前記第２圧力差を前記記憶部に記憶させる、
    　請求項１から３のいずれか一項に記載の学習装置。     The learning unit stores the first pressure difference and the second pressure difference in the storage unit after confirming that the intake pressure sensor, the exhaust pressure sensor, and the atmospheric pressure sensor have not failed.
    The learning device according to any one of claims 1 to 3.
  5. 　前記学習部は、前記所定の時間内に前記吸気圧センサが検出した吸気圧を平滑化した平滑化吸気圧と前記所定の時間内に前記大気圧センサが検出した大気圧を平滑化した平滑化大気圧との差を前記第１圧力差として算出し、かつ前記所定の時間内に前記排気圧センサが検出した排気圧を平滑化した平滑化排気圧と前記平滑化大気圧との差を前記第２圧力差として算出する、
    　請求項３に記載の学習装置。     The learning unit smoothes a smoothed intake pressure obtained by smoothing the intake pressure detected by the intake pressure sensor within the predetermined time and a smoothed pressure obtained by smoothing the atmospheric pressure detected by the atmospheric pressure sensor within the predetermined time. The difference between the atmospheric pressure is calculated as the first pressure difference, and the difference between the smoothed exhaust pressure obtained by smoothing the exhaust pressure detected by the exhaust pressure sensor within the predetermined time and the smoothed atmospheric pressure is Calculating as the second pressure difference,
    The learning device according to claim 3.
  6. 　コンピュータが実行する、車両の吸気圧を検出する吸気圧センサ、及び前記車両の排気圧を検出する排気圧センサの誤差を学習する学習方法であって、
    　前記車両に設けられている大気圧センサが所定の温度範囲において検出した大気圧、前記吸気圧センサが前記所定の温度範囲において検出した吸気圧、及び前記排気圧センサが前記所定の温度範囲において検出した排気圧を取得するステップと、
    　前記車両のエンジンが停止した状態で前記所定の温度範囲において前記吸気圧センサが検出した吸気圧と前記大気圧センサが検出した大気圧との差である第１圧力差、及び前記エンジンが停止した状態で前記所定の温度範囲において前記排気圧センサが検出した排気圧と前記大気圧センサが検出した大気圧との差である第２圧力差を記憶部に記憶させるステップと、
    　前記第１圧力差及び前記第２圧力差を前記記憶部に記憶させた後に、前記吸気圧センサが検出した吸気圧を前記第１圧力差に基づいて補正し、かつ前記排気圧センサが検出した排気圧を前記第２圧力差に基づいて補正するステップと、
    　を備える学習方法。     A learning method for learning an error of an intake pressure sensor for detecting an intake pressure of a vehicle and an exhaust pressure sensor for detecting an exhaust pressure of the vehicle, which is executed by a computer,
    The atmospheric pressure detected by the atmospheric pressure sensor provided in the vehicle in a predetermined temperature range, the intake pressure detected by the intake pressure sensor in the predetermined temperature range, and the exhaust pressure sensor detected in the predetermined temperature range Obtaining the exhaust pressure
    A first pressure difference that is a difference between an intake pressure detected by the intake pressure sensor and an atmospheric pressure detected by the atmospheric pressure sensor in the predetermined temperature range with the vehicle engine stopped, and the engine stopped Storing a second pressure difference, which is a difference between the exhaust pressure detected by the exhaust pressure sensor and the atmospheric pressure detected by the atmospheric pressure sensor in the predetermined temperature range in a state, in a storage unit;
    After the first pressure difference and the second pressure difference are stored in the storage unit, the intake pressure detected by the intake pressure sensor is corrected based on the first pressure difference, and the exhaust pressure sensor detects Correcting the exhaust pressure based on the second pressure difference;
    A learning method comprising:
PCT/JP2018/017979 2017-05-11 2018-05-09 Learning device and learning method WO2018207840A1 (en)

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