JP2020200823A - Defective part specification device, defective part specification system and defective part specification method - Google Patents

Defective part specification device, defective part specification system and defective part specification method Download PDF

Info

Publication number
JP2020200823A
JP2020200823A JP2019110536A JP2019110536A JP2020200823A JP 2020200823 A JP2020200823 A JP 2020200823A JP 2019110536 A JP2019110536 A JP 2019110536A JP 2019110536 A JP2019110536 A JP 2019110536A JP 2020200823 A JP2020200823 A JP 2020200823A
Authority
JP
Japan
Prior art keywords
pressure detection
fuel supply
failure
value
supply pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2019110536A
Other languages
Japanese (ja)
Other versions
JP7131492B2 (en
Inventor
優介 小林
Yusuke Kobayashi
優介 小林
克士 蔀
Katsushi Shitomi
克士 蔀
久仁男 野田
Kunio Noda
久仁男 野田
大貴 石井
Daiki Ishii
大貴 石井
文彦 岡崎
Fumihiko Okazaki
文彦 岡崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Isuzu Motors Ltd
Original Assignee
Isuzu Motors Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Isuzu Motors Ltd filed Critical Isuzu Motors Ltd
Priority to JP2019110536A priority Critical patent/JP7131492B2/en
Publication of JP2020200823A publication Critical patent/JP2020200823A/en
Application granted granted Critical
Publication of JP7131492B2 publication Critical patent/JP7131492B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/40Engine management systems

Landscapes

  • Fuel-Injection Apparatus (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

To provide a defective part specification device and a defective part specification system capable of accurately specifying a defective part of a fuel supply device.SOLUTION: A defective part specification device includes: a determination section determining whether specification of a defective part in a fuel supply device is started depending on a pressure detection value obtained by a pressure detection section; and a specification section specifying a defective part on the basis of a drive current value of a fuel supply pump and the pressure detection value when a determination that the specification of the defective part is started is made. The specification section specifies whether the defective part is a drive circuit of the fuel supply pump depending on a difference value of the drive current value from a target current value of the fuel supply pump, specifies whether the defective part is the pressure detection section depending on temporal variation amount of the pressure detection value when specifying that the defective part is not the drive circuit, and specifies that the defective part is a metering valve of the fuel supply pump when specifying that the defective part is neither the drive circuit nor the pressure detection section.SELECTED DRAWING: Figure 1

Description

本開示は、故障部位特定装置、故障部位特定システムおよび故障部位特定方法に関する。 The present disclosure relates to a failure site identification device, a failure site identification system, and a failure site identification method.

従来、コモンレール等を搭載する、内燃機関への燃料供給装置が知られている。このような燃料供給装置では、燃料供給ポンプによってコモンレールに高圧燃料を供給し、コモンレール内の高圧燃料を順次、インジェクタで気筒の燃焼室内に噴射する。 Conventionally, a fuel supply device for an internal combustion engine equipped with a common rail or the like is known. In such a fuel supply device, high-pressure fuel is supplied to the common rail by a fuel supply pump, and the high-pressure fuel in the common rail is sequentially injected into the combustion chamber of the cylinder by an injector.

コモンレール内の圧力は目標圧力になるように設定されているが、燃料供給装置内で何らかの故障が発生すると、コモンレール内の圧力が目標圧力を超える異常値となる場合がある。この場合、故障部位を特定するために燃料供給装置の各部品を分解調査する必要が生じるので、燃料供給装置の修理期間が発生するとともに、修理における費用がかかる。 The pressure in the common rail is set to reach the target pressure, but if any failure occurs in the fuel supply device, the pressure in the common rail may become an abnormal value exceeding the target pressure. In this case, since it is necessary to disassemble and inspect each part of the fuel supply device in order to identify the faulty part, the repair period of the fuel supply device is required and the repair cost is high.

上記のような燃料供給装置の故障部位を特定するため、例えば特許文献1には、燃料供給ポンプの駆動電流値が通常範囲外のとき、燃料供給ポンプの故障とし、コモンレールの圧力検出部の検出値が通常範囲外のとき、圧力検出部の故障とする構成が開示されている。 In order to identify the failure part of the fuel supply device as described above, for example, in Patent Document 1, when the drive current value of the fuel supply pump is out of the normal range, the fuel supply pump is regarded as a failure and the pressure detection unit of the common rail is detected. A configuration is disclosed in which a pressure detection unit fails when the value is out of the normal range.

特開2003−161196号公報Japanese Unexamined Patent Publication No. 2003-161196

しかしながら、燃料供給ポンプの駆動電流値が通常範囲内であっても、例えば燃料供給ポンプの調量弁が故障した場合、コモンレール内の圧力が異常値となる場合がある。この場合、特許文献1に記載の構成では、圧力検出部の故障と判断されることとなる。つまり、特許文献1に記載の構成は、燃料供給装置における故障部位を特定する構成として一定の限界があった。 However, even if the drive current value of the fuel supply pump is within the normal range, the pressure in the common rail may become an abnormal value, for example, when the metering valve of the fuel supply pump fails. In this case, in the configuration described in Patent Document 1, it is determined that the pressure detection unit has failed. That is, the configuration described in Patent Document 1 has a certain limit as a configuration for specifying a failure portion in the fuel supply device.

本開示の目的は、燃料供給装置における故障部位を精度良く特定することが可能な故障部位特定装置、故障部位特定システムおよび故障部位特定方法を提供することである。 An object of the present disclosure is to provide a failure site identification device, a failure site identification system, and a failure site identification method capable of accurately identifying a failure site in a fuel supply device.

本開示に係る故障部位特定装置は、
コモンレールおよび燃料供給ポンプを含む、内燃機関への燃料供給装置における故障部位特定装置であって、
前記コモンレール内の圧力を検出する圧力検出部の圧力検出値に応じて前記燃料供給装置における故障部位の特定を開始するか否かについて判定する判定部と、
前記判定部により前記故障部位の特定を開始すると判定された場合、前記燃料供給ポンプの駆動電流値と、前記圧力検出値とに基づいて前記故障部位を特定する特定部と、
を備え、
前記特定部は、
前記燃料供給ポンプの目標電流値に対する前記駆動電流値の差分値に応じて、前記故障部位が前記燃料供給ポンプの駆動回路であるか否かについて特定し、
前記圧力検出値の時間変動量に応じて、前記故障部位が前記圧力検出部であるか否かについて特定し、
前記故障部位が前記駆動回路および前記圧力検出部ではないと特定した場合、前記故障部位が前記燃料供給ポンプの調量弁であると特定する。
The failure site identification device according to the present disclosure is
A failure site identification device in a fuel supply device for an internal combustion engine, including a common rail and a fuel supply pump.
A determination unit that determines whether or not to start identifying a faulty part in the fuel supply device according to the pressure detection value of the pressure detection unit that detects the pressure in the common rail.
When it is determined by the determination unit that the identification of the failure portion is started, the identification unit that identifies the failure portion based on the drive current value of the fuel supply pump and the pressure detection value, and the identification unit.
With
The specific part is
It is specified whether or not the failure site is the drive circuit of the fuel supply pump according to the difference value of the drive current value with respect to the target current value of the fuel supply pump.
It is specified whether or not the failure site is the pressure detection unit according to the time fluctuation amount of the pressure detection value.
When it is specified that the failure part is not the drive circuit and the pressure detection unit, the failure part is specified to be the metering valve of the fuel supply pump.

本開示に係る故障部位特定システムは、
コモンレールおよび燃料供給ポンプを含み、内燃機関へ燃料を供給する燃料供給装置と、
上記の故障部位特定装置と、
を備える。
The failure site identification system according to this disclosure is
A fuel supply system that supplies fuel to the internal combustion engine, including a common rail and a fuel supply pump,
With the above failure site identification device,
To be equipped.

本開示に係る故障部位特定方法は、
コモンレールおよび燃料供給ポンプを含む、内燃機関への燃料供給装置における故障部位特定方法であって、
前記コモンレール内の圧力を検出する圧力検出部の圧力検出値に応じて前記燃料供給装置における故障部位の特定を開始するか否かについて判定するステップと、
前記故障部位の特定を開始すると判定した場合、前記燃料供給ポンプの駆動電流値と、前記圧力検出値とに基づいて前記故障部位を特定するステップと、を含み、
前記故障部位を特定するステップにおいて、
前記燃料供給ポンプの目標電流値に対する前記駆動電流値の差分値に応じて、前記故障部位が前記燃料供給ポンプの駆動回路であるか否かについて特定し、
前記圧力検出値の時間変動量に応じて、前記故障部位が前記圧力検出部であるか否かについて特定し、
前記故障部位が前記駆動回路および前記圧力検出部ではないと特定した場合、前記故障部位が前記燃料供給ポンプの調量弁であると特定する。
The method for identifying the faulty part according to the present disclosure is
A method for identifying a faulty part in a fuel supply device for an internal combustion engine, including a common rail and a fuel supply pump.
A step of determining whether or not to start identifying a faulty part in the fuel supply device according to the pressure detection value of the pressure detection unit that detects the pressure in the common rail, and
When it is determined to start the identification of the faulty part, the step of identifying the faulty part based on the drive current value of the fuel supply pump and the pressure detection value is included.
In the step of identifying the faulty part,
It is specified whether or not the failure site is the drive circuit of the fuel supply pump according to the difference value of the drive current value with respect to the target current value of the fuel supply pump.
It is specified whether or not the failure site is the pressure detection unit according to the time fluctuation amount of the pressure detection value.
When it is specified that the failure part is not the drive circuit and the pressure detection unit, the failure part is specified to be the metering valve of the fuel supply pump.

本開示によれば、燃料供給装置における故障部位を精度良く特定することができる。 According to the present disclosure, it is possible to accurately identify the faulty part in the fuel supply device.

本開示の実施の形態に係る故障部位特定システムの構成の一例を示す図である。It is a figure which shows an example of the structure of the failure part identification system which concerns on embodiment of this disclosure. 駆動回路における駆動電流値の時間変化の一例を示す図である。It is a figure which shows an example of the time change of the drive current value in a drive circuit. 圧力検出値の時間変化の一例を示す図である。It is a figure which shows an example of the time change of a pressure detection value. 圧力検出値の時間変化の一例を示す図である。It is a figure which shows an example of the time change of a pressure detection value. 圧力検出値の時間変化の一例を示す図である。It is a figure which shows an example of the time change of a pressure detection value. 故障部位特定装置における故障部位特定制御の動作例を示すフローチャートである。It is a flowchart which shows the operation example of the failure part identification control in the failure part identification apparatus. 故障部位特定制御の詳細に係る動作例を示すフローチャートである。It is a flowchart which shows the operation example which concerns on the detail of the failure part identification control.

以下、本実施の形態を図面に基づいて詳細に説明する。図1は、本開示の実施の形態に係る故障部位特定システム1の構成の一例を示す図である。 Hereinafter, the present embodiment will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an example of the configuration of the failure site identification system 1 according to the embodiment of the present disclosure.

図1に示すように、故障部位特定システム1は、車両の内燃機関(例えば、ディーゼルエンジン)に搭載される燃料供給装置10の故障部位を特定するシステムである。故障部位特定システム1は、燃料供給装置10と、故障部位特定装置100とを備える。 As shown in FIG. 1, the failure site identification system 1 is a system for identifying a failure site of a fuel supply device 10 mounted on an internal combustion engine (for example, a diesel engine) of a vehicle. The failure site identification system 1 includes a fuel supply device 10 and a failure site identification device 100.

燃料供給装置10は、内燃機関の気筒に燃料を噴射するインジェクタ(図示せず)に高圧燃料を供給する装置であり、燃料タンク20、フィードポンプ30、燃料フィルタ40、燃料供給ポンプ50、コモンレール60および記憶部70等を備える。 The fuel supply device 10 is a device that supplies high-pressure fuel to an injector (not shown) that injects fuel into a cylinder of an internal combustion engine, and is a fuel tank 20, a feed pump 30, a fuel filter 40, a fuel supply pump 50, and a common rail 60. And a storage unit 70 and the like.

燃料タンク20は、内燃機関に供給するための燃料を貯留するタンクである。フィードポンプ30は、燃料タンク20から燃料を汲み上げるポンプである。燃料フィルタ40は、フィードポンプ30によって汲み上げられた燃料に含まれる異物を捕集するフィルタである。 The fuel tank 20 is a tank for storing fuel for supplying to the internal combustion engine. The feed pump 30 is a pump that pumps fuel from the fuel tank 20. The fuel filter 40 is a filter that collects foreign substances contained in the fuel pumped by the feed pump 30.

燃料供給ポンプ50は、調量弁51と、高圧ポンプ52とを有しており、燃料フィルタ40を通過した燃料をコモンレール60に吐出する。 The fuel supply pump 50 has a metering valve 51 and a high-pressure pump 52, and discharges the fuel that has passed through the fuel filter 40 to the common rail 60.

調量弁51は、燃料フィルタ40を通過した燃料の流量を調整する弁である。調量弁51の開度は、コモンレール60に蓄えられた燃料の圧力が、運転状況に基づいて設定される目標圧力値となるように、図示しない制御装置(例えば、電子制御ユニット等)によって制御される。 The metering valve 51 is a valve that adjusts the flow rate of fuel that has passed through the fuel filter 40. The opening degree of the metering valve 51 is controlled by a control device (for example, an electronic control unit or the like) (not shown) so that the pressure of the fuel stored in the common rail 60 becomes a target pressure value set based on the operating condition. Will be done.

調量弁51には、駆動回路51Aと、駆動回路51Aを流れる電流値を検出する電流検出部51Bとが設けられている。駆動回路51Aの駆動電流値は、電流検出部51Bの検出値を、上記の制御装置が監視しながら、燃料の圧力の目標圧力値に対応する目標電流値になるように制御される。 The metering valve 51 is provided with a drive circuit 51A and a current detection unit 51B for detecting the current value flowing through the drive circuit 51A. The drive current value of the drive circuit 51A is controlled so as to be a target current value corresponding to the target pressure value of the fuel pressure while the above-mentioned control device monitors the detection value of the current detection unit 51B.

調量弁51は、停止状態のとき等、駆動回路51Aに駆動電流が流れていない場合、全開状態となり、駆動回路51Aへの駆動電流が大きくなるにつれ、開度が小さくなる。 When the drive current does not flow through the drive circuit 51A, such as when the metering valve 51 is stopped, the metering valve 51 is fully opened, and the opening degree decreases as the drive current to the drive circuit 51A increases.

高圧ポンプ52は、調量弁51からの燃料を高圧に加圧するポンプである。 The high-pressure pump 52 is a pump that pressurizes the fuel from the metering valve 51 to a high pressure.

コモンレール60は、燃料供給ポンプ50から吐出される高圧燃料を蓄圧しており、蓄圧した高圧燃料をインジェクタに供給する。コモンレール60には、コモンレール60内の圧力を検出する圧力検出部61が設けられる。 The common rail 60 accumulates high-pressure fuel discharged from the fuel supply pump 50, and supplies the accumulated high-pressure fuel to the injector. The common rail 60 is provided with a pressure detecting unit 61 for detecting the pressure in the common rail 60.

記憶部70は、例えば、駆動回路51Aの駆動電流値の時系列データ、当該駆動電流値に対応する目標電流値の時系列データおよびコモンレール60内の圧力検出値の時系列データ等を記憶する。 The storage unit 70 stores, for example, time-series data of the drive current value of the drive circuit 51A, time-series data of the target current value corresponding to the drive current value, time-series data of the pressure detection value in the common rail 60, and the like.

故障部位特定装置100は、図示しないCPU(Central Processing Unit)、ROM(Read Only Memory)、RAM(Random Access Memory)および入出力回路を備えている。故障部位特定装置100は、予め設定されたプログラムに基づいて、燃料供給装置10の故障部位を特定するように構成されている。 The failure site identification device 100 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and an input / output circuit (not shown). The failure site identification device 100 is configured to identify the failure site of the fuel supply device 10 based on a preset program.

故障部位特定装置100は、例えば車両の外部のデータセンター等に設けられており、通信部110と、判定部120と、特定部130とを有する。 The failure site identification device 100 is provided in, for example, a data center outside the vehicle, and has a communication unit 110, a determination unit 120, and a identification unit 130.

通信部110は、燃料供給装置10とデータの送受信を行う。通信部110は、燃料供給装置10における圧力検出部61の圧力検出値のデータ、および、記憶部70に記憶された各時系列データ等を受信する。 The communication unit 110 transmits / receives data to / from the fuel supply device 10. The communication unit 110 receives data of the pressure detection value of the pressure detection unit 61 in the fuel supply device 10, each time series data stored in the storage unit 70, and the like.

判定部120は、圧力検出部61の圧力検出値に応じて燃料供給装置10における故障部位の特定を開始するか否かについて判定する。具体的には、判定部120は、圧力検出値が所定圧力値以上である場合、故障部位の特定を開始すると判定する。所定圧力値は、例えば、コモンレール60内の目標圧力値を大幅に超える値等、適宜設定可能な値である。 The determination unit 120 determines whether or not to start identifying the failure portion in the fuel supply device 10 according to the pressure detection value of the pressure detection unit 61. Specifically, the determination unit 120 determines that when the pressure detection value is equal to or higher than a predetermined pressure value, the determination of the failure portion is started. The predetermined pressure value is a value that can be appropriately set, for example, a value that greatly exceeds the target pressure value in the common rail 60.

より具体的には、判定部120は、圧力検出値が所定圧力値以上となってから所定時間以内で圧力検出値が所定圧力値以上となる頻度が所定頻度以上、または、所定圧力値以上であり続ける場合、故障部位の特定を開始すると判定する。 More specifically, in the determination unit 120, the frequency with which the pressure detection value becomes the predetermined pressure value or more within a predetermined time after the pressure detection value becomes the predetermined pressure value or more is the predetermined frequency or more, or the predetermined pressure value or more. If it continues to exist, it is determined that the identification of the failed part is started.

所定時間は、例えば数秒程度の比較的短い時間であり、適宜設定され得る。また、所定頻度は、所定時間内で圧力検出値が振動状態となっていると認識可能な頻度であり、適宜設定され得る。 The predetermined time is a relatively short time of, for example, several seconds, and can be set as appropriate. Further, the predetermined frequency is a frequency at which the pressure detection value can be recognized as being in a vibration state within a predetermined time, and can be appropriately set.

特定部130は、判定部120により故障部位の特定を開始すると判定された場合、燃料供給ポンプ50の駆動電流値、つまり、調量弁51の駆動回路51Aの駆動電流値の時系列データ、および、圧力検出値の時系列データに基づいて故障部位を特定する。 When the determination unit 120 determines that the determination unit 120 starts identifying the faulty part, the identification unit 130 has time-series data of the drive current value of the fuel supply pump 50, that is, the drive current value of the drive circuit 51A of the metering valve 51, and , Identify the failure site based on the time series data of the pressure detection value.

なお、通信部110は、判定部120が故障部位の特定を開始すると判定したタイミングで記憶部70から各時系列データを受信するようにしても良いし、常時記憶部70から各時系列データを受信するようにしても良い。 The communication unit 110 may receive each time-series data from the storage unit 70 at the timing when the determination unit 120 determines that the determination of the failure portion starts, or the communication unit 110 may always receive the time-series data from the storage unit 70. You may try to receive it.

また、通信部110に受信される各時系列データは、故障部位の特定の開始タイミングの前後の時間に係るデータを含む。時系列データの範囲は、記憶部70の容量等に応じて適宜設定され得る。 Further, each time-series data received by the communication unit 110 includes data related to the time before and after the specific start timing of the failure portion. The range of the time series data can be appropriately set according to the capacity of the storage unit 70 and the like.

特定部130は、燃料供給ポンプ50の目標電流値に対する駆動電流値の差分値に応じて、故障部位が燃料供給ポンプ50の駆動回路51Aであるか否かについて特定する。具体的には、特定部130は、燃料供給ポンプ50の目標電流値に対する駆動電流値の差分値が所定電流値以上である場合、故障部位が燃料供給ポンプ50の駆動回路51Aであると特定する。 The identification unit 130 specifies whether or not the failure portion is the drive circuit 51A of the fuel supply pump 50 according to the difference value of the drive current value with respect to the target current value of the fuel supply pump 50. Specifically, when the difference value of the drive current value with respect to the target current value of the fuel supply pump 50 is equal to or greater than the predetermined current value, the identification unit 130 identifies the faulty part as the drive circuit 51A of the fuel supply pump 50. ..

所定電流値は、駆動電流値が目標電流値に対してある程度以上低いと認識できるような値であり、かつ、これ以上駆動電流値が低下した場合、所望の燃料供給ポンプ50の動作とならなくなる程度の値であり、適宜設定され得る。 The predetermined current value is a value that can be recognized that the drive current value is lower than the target current value to some extent, and if the drive current value is further lowered, the desired fuel supply pump 50 does not operate. It is a value of degree and can be set as appropriate.

特定部130は、圧力検出部61の圧力検出値の時間変動量に応じて、故障部位が圧力検出部61であるか否かについて特定する。具体的には、特定部130は、故障部位が駆動回路51Aではないと特定した場合であり、かつ、圧力検出値の時間変動量が所定変動量以上である場合、故障部位が圧力検出部61であると特定する。 The identification unit 130 specifies whether or not the failure site is the pressure detection unit 61 according to the time fluctuation amount of the pressure detection value of the pressure detection unit 61. Specifically, when the specific unit 130 specifies that the failure part is not the drive circuit 51A and the time fluctuation amount of the pressure detection value is equal to or more than the predetermined fluctuation amount, the failure part is the pressure detection unit 61. Identify as.

所定変動量は、通常の動作において発生し得る圧力の変動量を大幅に超える程度の変動量であり、適宜設定され得る。 The predetermined fluctuation amount is a fluctuation amount that greatly exceeds the pressure fluctuation amount that can occur in normal operation, and can be appropriately set.

特定部130は、故障部位が駆動回路51Aおよび圧力検出部61ではないと特定した場合、故障部位が燃料ポンプ5の調量弁51であると特定する。 When the identification unit 130 specifies that the failure portion is not the drive circuit 51A and the pressure detection unit 61, the identification unit 130 identifies the failure portion as the metering valve 51 of the fuel pump 5.

図2に示すように、駆動回路51Aの駆動電流値は、制御装置によって目標電流値になるように制御される。駆動回路51Aが正常である場合、駆動電流値は、目標電流値付近の値となる。図2では、目標電流値が一定となっている運転状況のときの例を示している。 As shown in FIG. 2, the drive current value of the drive circuit 51A is controlled by the control device so as to reach the target current value. When the drive circuit 51A is normal, the drive current value becomes a value near the target current value. FIG. 2 shows an example in an operating situation where the target current value is constant.

しかし、例えば、駆動回路51Aでハーネスの断線が発生した場合、駆動電流値が0となる。そのため、駆動回路51Aの駆動電流値が目標電流値に対して大幅に低くなる。 However, for example, when the harness is disconnected in the drive circuit 51A, the drive current value becomes 0. Therefore, the drive current value of the drive circuit 51A is significantly lower than the target current value.

そうすると、調量弁51が駆動しないので、調量弁51が全開状態となる。その結果、コモンレール60内が高圧状態となる。 Then, since the metering valve 51 is not driven, the metering valve 51 is fully opened. As a result, the inside of the common rail 60 becomes a high pressure state.

このような場合には、特定部130は、故障部位が燃料供給ポンプ50の駆動回路51Aであると特定する。また、特定部130は、駆動電流値が目標電流値付近の値、または、目標電流値に対して所定電流値以内の範囲である場合、故障部位が駆動回路51Aではない特定する。 In such a case, the specifying unit 130 identifies the faulty part as the drive circuit 51A of the fuel supply pump 50. Further, when the drive current value is a value near the target current value or within a predetermined current value with respect to the target current value, the identification unit 130 specifies that the failure portion is not the drive circuit 51A.

また、故障部位が駆動回路51Aではない場合、駆動電流値は、上記したように、目標電流値付近の値となる。この場合において、図3に示すように、圧力検出部61が故障していると、圧力検出値が所望の値である目標圧力値付近の値で安定せず、比較的大きな変動による振動状態となる場合がある。 When the faulty part is not the drive circuit 51A, the drive current value is a value near the target current value as described above. In this case, as shown in FIG. 3, if the pressure detection unit 61 is out of order, the pressure detection value is not stable at a value near the target pressure value, which is a desired value, and a vibration state due to a relatively large fluctuation occurs. May become.

このような場合には、特定部130は、故障部位が圧力検出部61であると特定する。また、特定部130は、圧力検出値の時間変動量が所定変動量未満のように、微小な変動量である場合、故障部位が圧力検出部61ではないと特定する。 In such a case, the identification unit 130 identifies the failure site as the pressure detection unit 61. Further, the specifying unit 130 specifies that the failure site is not the pressure detecting unit 61 when the time fluctuation amount of the pressure detection value is a minute fluctuation amount such as less than the predetermined fluctuation amount.

また、調量弁51が故障している場合、図4に示すように、調量弁51は全開状態となるので、コモンレール60内が高圧状態となる。そのため、この場合、圧力検出部61における圧力検出値が目標圧力値を大幅に超えた、一定の値となる。 Further, when the metering valve 51 is out of order, as shown in FIG. 4, the metering valve 51 is in a fully open state, so that the inside of the common rail 60 is in a high pressure state. Therefore, in this case, the pressure detection value in the pressure detection unit 61 becomes a constant value that greatly exceeds the target pressure value.

ここで、駆動電流値および圧力検出値が、故障部位の特定対象となるような値ではない場合、特定部130は、故障部位が駆動回路51Aおよび圧力検出部61ではないと特定する。そして、特定部130は、故障部位が調量弁51であると特定する。 Here, when the drive current value and the pressure detection value are not values that are the targets for specifying the failure portion, the identification unit 130 specifies that the failure portion is not the drive circuit 51A and the pressure detection unit 61. Then, the specifying unit 130 identifies the faulty part as the metering valve 51.

以上のように、本実施の形態では、特定部130によって、燃料供給装置10の故障部位を、駆動回路51A、圧力検出部61および調量弁51の何れかであることを容易に切り分けることができる。その結果、燃料供給装置10における故障部位を精度良く特定することができる。 As described above, in the present embodiment, the failure portion of the fuel supply device 10 can be easily separated from the drive circuit 51A, the pressure detection unit 61, and the metering valve 51 by the specific unit 130. it can. As a result, the faulty part in the fuel supply device 10 can be accurately identified.

また、特定部130は、内燃機関の停止中に圧力検出部61の圧力検出値が0で一定とならない場合、故障部位が圧力検出部61であると特定する。 Further, when the pressure detection value of the pressure detection unit 61 is 0 and does not become constant while the internal combustion engine is stopped, the identification unit 130 identifies the failure site as the pressure detection unit 61.

記憶部70より取得した時系列データにおいて、内燃機関の停止期間が含まれる場合、内燃機関の停止(時間T)に伴って、コモンレール60内の圧力も低下して0になる。そのため、圧力検出部61が故障していない場合、図5に示すように、圧力検出値が徐々に0まで低下して一定となる(実線参照)。 When the time series data acquired from the storage unit 70 includes the stop period of the internal combustion engine, the pressure in the common rail 60 also decreases to 0 as the internal combustion engine stops (time T). Therefore, when the pressure detection unit 61 is not out of order, as shown in FIG. 5, the pressure detection value gradually decreases to 0 and becomes constant (see the solid line).

しかし、圧力検出部61が故障していると、圧力検出値が0まで低下しない(破線P1)、または、0付近まで低下した後、変動する(破線P2)。本実施の形態では、このような場合に、特定部130が、圧力検出部61が故障部位であると特定する。 However, if the pressure detection unit 61 is out of order, the pressure detection value does not decrease to 0 (broken line P1), or decreases to around 0 and then fluctuates (dashed line P2). In this embodiment, in such a case, the specific unit 130 identifies the pressure detection unit 61 as the failure site.

これにより、圧力検出部61が故障部位であることを容易に特定することができる。 As a result, it is possible to easily identify that the pressure detecting unit 61 is the faulty part.

また、通信部110は、特定部130により故障部位が特定された場合、特定部130の特定結果を外部に送信する。当該特定結果は、例えば、車両が受け取った場合、車両に設けられる表示部等に表示される。これにより、車両の乗員や、燃料供給装置の分解調査を行う作業者が、どの部位が故障部位であるかを容易に判断することができる。 Further, when the failure portion is specified by the specific unit 130, the communication unit 110 transmits the specific result of the specific unit 130 to the outside. When the vehicle receives the specific result, for example, it is displayed on a display unit or the like provided on the vehicle. As a result, the occupant of the vehicle and the worker who conducts the disassembly investigation of the fuel supply device can easily determine which part is the faulty part.

また、当該特定結果は、車両外の装置に表示されても良いし、故障部位特定装置そのものに表示されても良い。 Further, the specific result may be displayed on a device outside the vehicle, or may be displayed on the failure site identification device itself.

以上のように構成された故障部位特定装置100における故障部位特定制御の動作例について説明する。図6は、故障部位特定装置100における故障部位特定制御の動作例を示すフローチャートである。図6における処理は、例えば、車両が走行を開始した際に適宜実行される。 An operation example of the failure site identification control in the failure site identification device 100 configured as described above will be described. FIG. 6 is a flowchart showing an operation example of the failure site identification control in the failure site identification device 100. The process in FIG. 6 is appropriately executed, for example, when the vehicle starts traveling.

図6に示すように、故障部位特定装置100は、圧力検出部61による圧力検出値が所定圧力値以上であるか否かについて判定する(ステップS101)。判定の結果、圧力検出値が所定圧力値未満である場合(ステップS101、NO)、本制御は終了する。 As shown in FIG. 6, the failure site identification device 100 determines whether or not the pressure detection value by the pressure detection unit 61 is equal to or higher than the predetermined pressure value (step S101). As a result of the determination, when the pressure detection value is less than the predetermined pressure value (step S101, NO), this control ends.

一方、圧力検出値が所定圧力値以上である場合(ステップS101、YES)、故障部位特定装置100は、圧力検出値が所定時間内で継続的に所定圧力値以上または所定圧力値以上である頻度が所定頻度以上であるか否かについて判定する(ステップS102)。 On the other hand, when the pressure detection value is the predetermined pressure value or more (step S101, YES), the failure site identifying device 100 continuously has the pressure detection value of the predetermined pressure value or more or the predetermined pressure value or more within the predetermined time. Is determined whether or not the frequency is equal to or higher than the predetermined frequency (step S102).

判定の結果、所定圧力値以上または所定頻度以上ではない場合(ステップS102、NO)、本制御は終了する。一方、所定圧力値以上または所定頻度以上である場合(ステップS102、YES)、故障部位特定装置100は、故障部位特定制御を開始する(ステップS103)。ステップS103の後、本制御は終了する。 As a result of the determination, if the pressure value is not equal to or higher than the predetermined pressure value or the frequency is not higher than the predetermined frequency (step S102, NO), this control ends. On the other hand, when the pressure value is equal to or higher than the predetermined pressure value or the frequency is higher than the predetermined frequency (step S102, YES), the failure site identification device 100 starts the failure site identification control (step S103). After step S103, this control ends.

次に、故障部位特定装置100における故障部位特定制御の詳細について説明する。図7は、故障部位特定制御の詳細に係る動作例を示すフローチャートである。図7における処理は、図6におけるステップS103の処理が実行された際に適宜実行される。 Next, the details of the failure site identification control in the failure site identification device 100 will be described. FIG. 7 is a flowchart showing an operation example relating to the details of the failure site identification control. The process in FIG. 7 is appropriately executed when the process in step S103 in FIG. 6 is executed.

図7に示すように、故障部位特定装置100は、時系列データの中に、内燃機関の停止期間があるか否かについて判定する(ステップS201)。判定の結果、内燃機関の停止期間がない場合(ステップS201、NO)、処理はステップS203に遷移する。 As shown in FIG. 7, the failure site identification device 100 determines whether or not there is a stop period of the internal combustion engine in the time series data (step S201). As a result of the determination, if there is no stop period of the internal combustion engine (step S201, NO), the process proceeds to step S203.

一方、内燃機関の停止期間がある場合(ステップS201、YES)、故障部位特定装置100は、圧力検出部61の圧力検出値が、内燃機関の停止後、0で一定となるか否かについて判定する(ステップS202)。 On the other hand, when there is a stop period of the internal combustion engine (step S201, YES), the failure site identification device 100 determines whether or not the pressure detection value of the pressure detection unit 61 becomes constant at 0 after the internal combustion engine is stopped. (Step S202).

判定の結果、圧力検出値が0で一定とならない場合(ステップS202、NO)、処理はステップS206に遷移する。一方、圧力検出値が0で一定となる場合(ステップS202、YES)、故障部位特定装置100は、目標電流値と駆動電流値の差分値が所定電流値以上であるか否かについて判定する(ステップS203)。 As a result of the determination, when the pressure detection value is 0 and is not constant (step S202, NO), the process proceeds to step S206. On the other hand, when the pressure detection value is 0 and constant (step S202, YES), the failure site identification device 100 determines whether or not the difference value between the target current value and the drive current value is equal to or greater than the predetermined current value (step S202, YES). Step S203).

判定の結果、差分値が所定電流値以上である場合(ステップS203、YES)、故障部位特定装置100は、故障部位が駆動回路51Aであると特定する(ステップS204)。 As a result of the determination, when the difference value is equal to or greater than the predetermined current value (step S203, YES), the failure site identification device 100 identifies that the failure site is the drive circuit 51A (step S204).

一方、差分値が所定電流値未満である場合(ステップS203、NO)、故障部位特定装置100は、圧力検出値の時間変動量が所定変動量以上であるか否かについて判定する(ステップS205)。 On the other hand, when the difference value is less than the predetermined current value (step S203, NO), the failure site identifying device 100 determines whether or not the time fluctuation amount of the pressure detection value is equal to or more than the predetermined fluctuation amount (step S205). ..

判定の結果、時間変動量が所定変動量以上である場合(ステップS205、YES)、故障部位特定装置100は、故障部位が圧力検出部61であると特定する(ステップS206)。 As a result of the determination, when the time fluctuation amount is equal to or more than the predetermined fluctuation amount (step S205, YES), the failure site identification device 100 identifies that the failure site is the pressure detection unit 61 (step S206).

一方、時間変動量が所定変動量未満である場合(ステップS205、NO)、故障部位特定装置100は、故障部位が調量弁51であると特定する(ステップS207)。ステップS204、ステップS206またはステップS207の後、本制御は終了する。 On the other hand, when the time fluctuation amount is less than the predetermined fluctuation amount (step S205, NO), the failure site identification device 100 identifies that the failure site is the metering valve 51 (step S207). After step S204, step S206 or step S207, this control ends.

以上のように構成された本実施の形態によれば、特定部130が、燃料供給ポンプ50の駆動電流値と、圧力検出部61の圧力検出値とに基づいて燃料供給装置10の故障部位を特定する。 According to the present embodiment configured as described above, the specific unit 130 determines the failure portion of the fuel supply device 10 based on the drive current value of the fuel supply pump 50 and the pressure detection value of the pressure detection unit 61. Identify.

具体的には、特定部130は、燃料供給ポンプ50の目標電流値に対して駆動電流値の差分値が所定電流値以上である場合、故障部位が燃料供給ポンプ50の駆動回路51Aであると特定する。 Specifically, when the difference value of the drive current value with respect to the target current value of the fuel supply pump 50 is equal to or greater than the predetermined current value, the specific unit 130 determines that the failure site is the drive circuit 51A of the fuel supply pump 50. Identify.

また、特定部130は、故障部位が駆動回路51Aであると特定しない場合、圧力検出値の時間変動量が、所定変動量以上である場合、故障部位が圧力検出部61であると特定する。 Further, the specifying unit 130 specifies that the faulty part is the pressure detecting unit 61 when the time fluctuation amount of the pressure detection value is equal to or more than the predetermined fluctuation amount when the failure part is not specified as the drive circuit 51A.

また、特定部130は、故障部位が駆動回路51Aおよび圧力検出部61であると特定しない場合、故障部位が燃料供給ポンプ50の調量弁51であると特定する。 Further, when the failure part is not specified to be the drive circuit 51A and the pressure detection part 61, the identification unit 130 specifies that the failure part is the metering valve 51 of the fuel supply pump 50.

このように、本実施の形態では、故障部位が駆動回路51A、圧力検出部61、および、調量弁51の何れかであることを容易に特定することができるので、燃料供給装置10における故障部位を精度良く特定することができる。 As described above, in the present embodiment, since it is possible to easily identify which of the drive circuit 51A, the pressure detection unit 61, and the metering valve 51 is the failure portion, the failure in the fuel supply device 10 The part can be identified accurately.

また、燃料供給装置10を分解することなく、故障部位を特定することができるので、燃料供給装置10の交換作業者が故障部位に該当する部品のみを交換するだけで良くなる。その結果、燃料供給装置10の部品交換における作業工数を削減することができる。 Further, since the faulty part can be specified without disassembling the fuel supply device 10, the replacement worker of the fuel supply device 10 only needs to replace only the parts corresponding to the faulty part. As a result, the man-hours required for replacing parts of the fuel supply device 10 can be reduced.

また、時系列データ内に内燃機関の停止期間がある場合であって、当該停止期間内で圧力検出値が0で一定とならない場合、特定部130が、詳細な特定を行う前に、故障部位が圧力検出部61であると特定する。 Further, when there is a stop period of the internal combustion engine in the time series data and the pressure detection value is 0 and does not become constant within the stop period, the failure part before the specific unit 130 performs detailed identification. Is the pressure detection unit 61.

つまり、各部位における故障部位の特定に加えて、別途、圧力検出部61が故障部位であることを特定できるので、燃料供給装置10における故障部位をさらに精度良く特定することができる。また、圧力検出部61が故障部位であると特定された場合、各部位における故障部位の特定を行う必要がなくなるので、処理を簡素化することができる。 That is, in addition to the identification of the failure portion in each portion, the pressure detection unit 61 can separately identify the failure portion, so that the failure portion in the fuel supply device 10 can be identified more accurately. Further, when the pressure detection unit 61 is identified as a failure portion, it is not necessary to identify the failure portion in each portion, so that the process can be simplified.

また、判定部120が、圧力検出値が所定圧力値以上である時間に応じて、故障部位の特定を開始すると判定するので、例えば、ノイズの影響で圧力検出値が所定圧力値以上となった場合、判定部120が故障部位の特定を開始しないと判定する。その結果、無駄に故障部位特定制御を行わないので、処理を簡素化することができる。 Further, since the determination unit 120 determines that the failure portion is to be identified according to the time when the pressure detection value is equal to or greater than the predetermined pressure value, for example, the pressure detection value becomes equal to or greater than the predetermined pressure value due to the influence of noise. In this case, it is determined that the determination unit 120 does not start identifying the faulty part. As a result, the failure site identification control is not performed unnecessarily, so that the processing can be simplified.

なお、上記実施の形態では、故障部位特定装置100が車両の外部に設けられていたが、本開示はこれに限定されず、車両内に設けられていても良い。 In the above embodiment, the failure site identification device 100 is provided outside the vehicle, but the present disclosure is not limited to this, and the failure site identifying device 100 may be provided inside the vehicle.

また、上記実施の形態では、特定部130が、故障部位が駆動回路51Aではないと特定した場合、故障部位が圧力検出部61であるか否かについて特定していたが、本開示はこれに限定されない。例えば、特定部130が、駆動回路51Aおよび圧力検出部61が故障部位であるか否かについての特定を並列に行っても良いし、圧力検出部61が故障部位であるか否かについての特定を駆動回路51Aよりも先に行っても良い。 Further, in the above embodiment, when the specific unit 130 specifies that the failure part is not the drive circuit 51A, it specifies whether or not the failure part is the pressure detection unit 61. Not limited. For example, the specific unit 130 may specify in parallel whether or not the drive circuit 51A and the pressure detection unit 61 are failure parts, or the pressure detection unit 61 may specify whether or not the pressure detection unit 61 is a failure part. May be performed before the drive circuit 51A.

また、上記実施の形態では、フィードポンプ30、燃料フィルタ40の順に燃料タンク20からの燃料が供給される構成となっていたが、本開示はこれに限定されず、燃料フィルタ、フィードポンプの順に燃料が供給される構成であっても良い。 Further, in the above embodiment, the fuel is supplied from the fuel tank 20 in the order of the feed pump 30 and the fuel filter 40, but the present disclosure is not limited to this, and the fuel filter and the feed pump are supplied in this order. The configuration may be such that fuel is supplied.

その他、上記実施の形態は、何れも本開示を実施するにあたっての具体化の一例を示したものに過ぎず、これらによって本開示の技術的範囲が限定的に解釈されてはならないものである。すなわち、本開示はその要旨、またはその主要な特徴から逸脱することなく、様々な形で実施することができる。 In addition, the above-described embodiments are merely examples of embodiment of the present disclosure, and the technical scope of the present disclosure should not be construed in a limited manner by these. That is, the present disclosure can be implemented in various forms without departing from its gist or its main features.

本開示の故障部位特定装置は、燃料供給装置における故障部位を精度良く特定することが可能な故障部位特定装置、故障部位特定システムおよび故障部位特定方法として有用である。 The failure site identification device of the present disclosure is useful as a failure site identification device, a failure site identification system, and a failure site identification method capable of accurately identifying a failure site in a fuel supply device.

1 故障部位特定システム
10 燃料供給装置
20 燃料タンク
30 フィードポンプ
40 燃料フィルタ
50 燃料供給ポンプ
51 調量弁
51A 駆動回路
51B 電流検出部
52 高圧ポンプ
60 コモンレール
61 圧力検出部
70 記憶部
100 故障部位特定装置
110 通信部
120 判定部
130 特定部
1 Failure site identification system 10 Fuel supply device 20 Fuel tank 30 Feed pump 40 Fuel filter 50 Fuel supply pump 51 Metering valve 51A Drive circuit 51B Current detection unit 52 High pressure pump 60 Common rail 61 Pressure detection unit 70 Storage unit 100 Failure site identification device 110 Communication unit 120 Judgment unit 130 Specific unit

Claims (8)

コモンレールおよび燃料供給ポンプを含む、内燃機関への燃料供給装置における故障部位特定装置であって、
前記コモンレール内の圧力を検出する圧力検出部の圧力検出値に応じて前記燃料供給装置における故障部位の特定を開始するか否かについて判定する判定部と、
前記判定部により前記故障部位の特定を開始すると判定された場合、前記燃料供給ポンプの駆動電流値と、前記圧力検出値とに基づいて前記故障部位を特定する特定部と、
を備え、
前記特定部は、
前記燃料供給ポンプの目標電流値に対する前記駆動電流値の差分値に応じて、前記故障部位が前記燃料供給ポンプの駆動回路であるか否かについて特定し、
前記圧力検出値の時間変動量に応じて、前記故障部位が前記圧力検出部であるか否かについて特定し、
前記故障部位が前記駆動回路および前記圧力検出部ではないと特定した場合、前記故障部位が前記燃料供給ポンプの調量弁であると特定する、
故障部位特定装置。
A failure site identification device in a fuel supply device for an internal combustion engine, including a common rail and a fuel supply pump.
A determination unit that determines whether or not to start identifying a faulty part in the fuel supply device according to the pressure detection value of the pressure detection unit that detects the pressure in the common rail.
When it is determined by the determination unit that the identification of the failure portion is started, the identification unit that identifies the failure portion based on the drive current value of the fuel supply pump and the pressure detection value, and the identification unit.
With
The specific part is
It is specified whether or not the failure site is the drive circuit of the fuel supply pump according to the difference value of the drive current value with respect to the target current value of the fuel supply pump.
It is specified whether or not the failure site is the pressure detection unit according to the time fluctuation amount of the pressure detection value.
When it is specified that the failure part is not the drive circuit and the pressure detection part, the failure part is specified to be the metering valve of the fuel supply pump.
Failure site identification device.
前記特定部は、
前記差分値が所定電流値以上である場合、前記故障部位が前記燃料供給ポンプの駆動回路であると特定し、
前記時間変動量が所定変動量以上である場合、前記故障部位が前記圧力検出部であると特定する、
請求項1に記載の故障部位特定装置。
The specific part is
When the difference value is equal to or greater than a predetermined current value, it is identified that the failure site is the drive circuit of the fuel supply pump.
When the time fluctuation amount is equal to or more than a predetermined fluctuation amount, the failure site is identified as the pressure detection unit.
The failure site identification device according to claim 1.
前記特定部は、前記内燃機関の停止中に前記圧力検出値が0で一定とならない場合、前記故障部位が前記圧力検出部であると特定する、
請求項2に記載の故障部位特定装置。
When the pressure detection value is 0 and does not become constant while the internal combustion engine is stopped, the specific unit identifies the failure site as the pressure detection unit.
The failure site identification device according to claim 2.
前記特定部は、前記判定部により前記故障部位の特定を開始すると判定された場合、前記駆動電流値の時系列データ、および、前記圧力検出値の時系列データに基づいて前記故障部位を特定し、
各時系列データは、前記故障部位の特定の開始タイミングの前後の時間に係るデータを含む、
請求項1〜3の何れか1項に記載の故障部位特定装置。
When the determination unit determines that the determination unit starts identifying the failure portion, the identification unit identifies the failure portion based on the time-series data of the drive current value and the time-series data of the pressure detection value. ,
Each time-series data includes data relating to the time before and after the specific start timing of the failure site.
The failure site identification device according to any one of claims 1 to 3.
前記判定部は、前記圧力検出値が所定圧力値以上である場合、前記故障部位の特定を開始すると判定する、
請求項1〜4の何れか1項に記載の故障部位特定装置。
When the pressure detection value is equal to or higher than a predetermined pressure value, the determination unit determines to start identifying the failure portion.
The failure site identification device according to any one of claims 1 to 4.
前記判定部は、前記圧力検出値が前記所定圧力値以上である時間に応じて、前記故障部位の特定を開始すると判定する、
請求項5に記載の故障部位特定装置。
The determination unit determines that the identification of the failure portion is started according to the time when the pressure detection value is equal to or higher than the predetermined pressure value.
The failure site identification device according to claim 5.
コモンレールおよび燃料供給ポンプを含み、内燃機関へ燃料を供給する燃料供給装置と、
請求項1〜6の何れか1項に記載の故障部位特定装置と、
を備える故障部位特定システム。
A fuel supply system that supplies fuel to the internal combustion engine, including a common rail and a fuel supply pump,
The failure site identification device according to any one of claims 1 to 6,
Failure site identification system equipped with.
コモンレールおよび燃料供給ポンプを含む、内燃機関への燃料供給装置における故障部位特定方法であって、
前記コモンレール内の圧力を検出する圧力検出部の圧力検出値に応じて前記燃料供給装置における故障部位の特定を開始するか否かについて判定するステップと、
前記故障部位の特定を開始すると判定した場合、前記燃料供給ポンプの駆動電流値と、前記圧力検出値とに基づいて前記故障部位を特定するステップと、を含み、
前記故障部位を特定するステップにおいて、
前記燃料供給ポンプの目標電流値に対する前記駆動電流値の差分値に応じて、前記故障部位が前記燃料供給ポンプの駆動回路であるか否かについて特定し、
前記圧力検出値の時間変動量に応じて、前記故障部位が前記圧力検出部であるか否かについて特定し、
前記故障部位が前記駆動回路および前記圧力検出部ではないと特定した場合、前記故障部位が前記燃料供給ポンプの調量弁であると特定する故障部位特定方法。
A method for identifying a faulty part in a fuel supply device for an internal combustion engine, including a common rail and a fuel supply pump.
A step of determining whether or not to start identifying a faulty part in the fuel supply device according to the pressure detection value of the pressure detection unit that detects the pressure in the common rail, and
When it is determined to start the identification of the faulty part, the step of identifying the faulty part based on the drive current value of the fuel supply pump and the pressure detection value is included.
In the step of identifying the faulty part,
It is specified whether or not the failure site is the drive circuit of the fuel supply pump according to the difference value of the drive current value with respect to the target current value of the fuel supply pump.
It is specified whether or not the failure site is the pressure detection unit according to the time fluctuation amount of the pressure detection value.
A method for identifying a faulty part that identifies the faulty part as a metering valve of the fuel supply pump when it is specified that the faulty part is not the drive circuit and the pressure detecting unit.
JP2019110536A 2019-06-13 2019-06-13 Failure part identification device, failure part identification system, and failure part identification method Active JP7131492B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019110536A JP7131492B2 (en) 2019-06-13 2019-06-13 Failure part identification device, failure part identification system, and failure part identification method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019110536A JP7131492B2 (en) 2019-06-13 2019-06-13 Failure part identification device, failure part identification system, and failure part identification method

Publications (2)

Publication Number Publication Date
JP2020200823A true JP2020200823A (en) 2020-12-17
JP7131492B2 JP7131492B2 (en) 2022-09-06

Family

ID=73743914

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019110536A Active JP7131492B2 (en) 2019-06-13 2019-06-13 Failure part identification device, failure part identification system, and failure part identification method

Country Status (1)

Country Link
JP (1) JP7131492B2 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003161196A (en) * 2001-11-29 2003-06-06 Denso Corp Accumulator fuel injection unit
JP2003222045A (en) * 2001-11-22 2003-08-08 Denso Corp Accumulator fuel injection device
JP2003293835A (en) * 2002-04-05 2003-10-15 Denso Corp Accumulator fuel injection system
JP2005147005A (en) * 2003-11-17 2005-06-09 Denso Corp Fuel injection device for internal combustion engine
JP2007255394A (en) * 2006-03-27 2007-10-04 Denso Corp Pump failure diagnostic apparatus
JP2014224479A (en) * 2013-05-15 2014-12-04 株式会社デンソー Electronic control device
US20180216566A1 (en) * 2017-01-30 2018-08-02 General Electric Company Methods and system for diagnosing a high-pressure fuel pump in a fuel system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003222045A (en) * 2001-11-22 2003-08-08 Denso Corp Accumulator fuel injection device
JP2003161196A (en) * 2001-11-29 2003-06-06 Denso Corp Accumulator fuel injection unit
JP2003293835A (en) * 2002-04-05 2003-10-15 Denso Corp Accumulator fuel injection system
JP2005147005A (en) * 2003-11-17 2005-06-09 Denso Corp Fuel injection device for internal combustion engine
JP2007255394A (en) * 2006-03-27 2007-10-04 Denso Corp Pump failure diagnostic apparatus
JP2014224479A (en) * 2013-05-15 2014-12-04 株式会社デンソー Electronic control device
US20180216566A1 (en) * 2017-01-30 2018-08-02 General Electric Company Methods and system for diagnosing a high-pressure fuel pump in a fuel system

Also Published As

Publication number Publication date
JP7131492B2 (en) 2022-09-06

Similar Documents

Publication Publication Date Title
US20090205413A1 (en) Diagnostic apparatus for high-pressure fuel supply system
US9284904B2 (en) Method and device for monitoring a high-pressure fuel system
US8069713B2 (en) Method for evaluating the plausibility of a pressure difference value determined across a particle filter
US9523325B2 (en) Method and system for diagnosing failure of a gasoline direct injection engine
JP2010203330A (en) Device for diagnosing abnormality of fuel supply path
US7775102B2 (en) Method for testing a high-pressure pump in a fuel system
US11242815B2 (en) Error diagnosis device and error diagnosis method
JPH09170518A (en) Method and equipment for discriminating leakage of fuel supply system in internal combustion engine with high-pressure fuel injection device
JP2010216279A (en) Fuel injection control device and accumulator fuel injection system using the same
JP7131492B2 (en) Failure part identification device, failure part identification system, and failure part identification method
JPH1082351A (en) Controlling method and controller for internal combustion engine
EP2999878B1 (en) Method and device for functional control of a high pressure fuel pump
JP5168222B2 (en) Fuel injection device
JP2013104343A (en) Fuel shutoff valve diagnosis apparatus
US20040237937A1 (en) Method, computer programme, control and/or regulation device for operation of an internal combustion engine and fuel system for an internal combustion engine
WO2019181995A1 (en) Error diagnosis device and error diagnosis method
JP4135666B2 (en) Engine fuel supply control device
JP6823286B2 (en) Internal combustion engine fuel injection system
US20190136784A1 (en) Method for operating an internal combustion engine, device for the open-loop and closed-loop control of an internal combustion engine, injection system, and internal combustion engine
US8108124B2 (en) Method for determining an uncontrolled acceleration of an internal combustion engine
JP2009138649A (en) Fuel supply device of internal combustion engine and abnormality determination device of fuel supply device
JP5804639B2 (en) Fuel leak detection method and common rail fuel injection control device
US20130151123A1 (en) Method and device for operating a pressure-regulating valve
CN111542694B (en) Method and device for predicting failure time of pressure limiting valve of vehicle high-pressure fuel pump
JP6561493B2 (en) Failure diagnosis device for fuel injection system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210831

TRDD Decision of grant or rejection written
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20220720

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20220726

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20220808

R150 Certificate of patent or registration of utility model

Ref document number: 7131492

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150