WO2018212178A1 - Control device and control method - Google Patents

Control device and control method Download PDF

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Publication number
WO2018212178A1
WO2018212178A1 PCT/JP2018/018757 JP2018018757W WO2018212178A1 WO 2018212178 A1 WO2018212178 A1 WO 2018212178A1 JP 2018018757 W JP2018018757 W JP 2018018757W WO 2018212178 A1 WO2018212178 A1 WO 2018212178A1
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WIPO (PCT)
Prior art keywords
opening
control
internal combustion
combustion engine
equal
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PCT/JP2018/018757
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French (fr)
Japanese (ja)
Inventor
将司 早崎
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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 CN201880027567.4A priority Critical patent/CN110573717A/en
Publication of WO2018212178A1 publication Critical patent/WO2018212178A1/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
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D43/00—Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment
    • 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 control device and a control method for performing control when the internal combustion engine is stopped.
  • idling stop control is performed in a vehicle equipped with an internal combustion engine for the purpose of improving fuel consumption and reducing exhaust gas.
  • the idling stop control is a control that automatically stops the internal combustion engine (without depending on the driver's operation) when the vehicle stops, and automatically restarts the internal combustion engine when the vehicle starts.
  • Patent Document 1 discloses a technique for stopping rotation of an internal combustion engine by generating a negative torque by driving a motor generator as a generator when performing idling stop control.
  • An object of the present disclosure is to provide a control device and a control method capable of realizing a quick start of a stopped internal combustion engine.
  • a control device includes an injection control unit that controls injection of fuel into a cylinder of an internal combustion engine, and a throttle that controls opening and closing of a throttle valve provided in an intake passage connected to the internal combustion engine.
  • a motor control unit that controls a motor, and when the internal combustion engine being driven is stopped, the motor control unit is controlled to stop the fuel injection by the injection control unit, and After the throttle opening / closing control unit performs control to close the throttle valve, the determination unit determines that the throttle valve opening is equal to or less than the first specified opening. If it is a constant, it executes a negative torque generation control to output a negative torque from the motor.
  • a control method includes injection of fuel into a cylinder of an internal combustion engine, opening and closing of a throttle valve provided in an intake passage connected to the internal combustion engine, and a crankshaft of the internal combustion engine
  • the stopped internal combustion engine can be quickly started.
  • FIG. 1 is a schematic diagram illustrating an example of a configuration of an internal combustion engine and its surroundings according to an embodiment of the present disclosure.
  • FIG. 2 is a block diagram illustrating a configuration example of the ECU according to the embodiment of the present disclosure.
  • FIG. 3 is a block diagram illustrating a configuration example of the HCU according to the embodiment of the present disclosure.
  • FIG. 4 is a sequence chart illustrating an operation example of the ECU and the HCU according to the embodiment of the present disclosure.
  • FIG. 1 is a schematic diagram showing an example of the configuration of an internal combustion engine and its surroundings according to the present embodiment.
  • broken arrows indicate the flow of electrical signals.
  • 1 is mounted on, for example, a vehicle in which idling stop control is performed.
  • An intake passage 3 is connected to an upstream side of a diesel engine (an example of an internal combustion engine, hereinafter referred to as an engine) 1 via an intake manifold 2.
  • an exhaust passage is connected to the downstream side of the engine 1 via an exhaust manifold.
  • the intake passage 3 is provided with a throttle valve 4 that adjusts the flow rate of air sucked into the engine 1.
  • the opening degree of the throttle valve 4 is controlled by an ECU (Engine Control Unit) 10.
  • the intake passage 3 is provided with an opening degree sensor 5 for detecting the opening degree of the throttle valve 4.
  • the opening sensor 5 appropriately outputs a signal indicating the detected opening of the throttle valve 4 (hereinafter referred to as a detected opening) to the ECU 10.
  • the engine 1 includes a plurality of cylinders (cylinders) and a fuel injection device (injector) that injects fuel into each cylinder.
  • the fuel injection operation by the fuel injection device is controlled by the ECU 10.
  • Each cylinder is provided with a piston (not shown) that slides up and down in the cylinder.
  • crankshaft 6 is connected to a connecting rod (not shown) that converts the vertical movement of the piston into a rotational movement. Thereby, the crankshaft 6 rotates.
  • omitted the crankshaft 6 is connected to the predetermined
  • the crankshaft 6 is connected to an output shaft 9 of a motor generator (hereinafter referred to as a motor) 8 via an endless belt.
  • the output shaft 9 is rotated by driving the motor 8.
  • the motor 8 is controlled by an HCU (Hybrid Control Unit) 20.
  • Rotational motion of the output shaft 9 is transmitted to the crankshaft 6 through the endless belt 7.
  • BAS Belted Alternator Starter
  • the connecting means between the output shaft 9 and the crankshaft 6 is not limited to the endless belt 7.
  • crankshaft 6 is provided with a rotational speed sensor that detects the rotational speed of the engine 1.
  • the rotation speed sensor appropriately outputs a signal indicating the detected rotation speed (hereinafter referred to as a detected rotation speed) to the ECU 10.
  • the ECU 10 and the HCU 20 will be described later with reference to FIGS.
  • the ECU 10 and the HCU 20 according to the present embodiment correspond to an example of a “control device”.
  • FIG. 2 is a block diagram illustrating a configuration example of the ECU 10.
  • ECU10 has the injection control part 110, the throttle opening / closing control part 120, and the information output part 130.
  • the injection control unit 110 controls the fuel injection device so as to inject a predetermined amount of fuel at a predetermined timing.
  • control for causing the fuel injection device to perform fuel injection is referred to as “injection control”
  • injection stop control control for causing the fuel injection device to stop fuel injection is referred to as “injection stop control”.
  • the throttle opening / closing control unit 120 controls the throttle valve 4 to be in an open state or a closed state.
  • the control for opening the throttle valve 4 is referred to as “open control”
  • the control for closing the throttle valve 4 is referred to as “closed control”.
  • the information output unit 130 outputs various information to the HCU 20.
  • the various information includes, for example, information indicating a detected opening detected by the opening sensor 4 (hereinafter referred to as opening information), information indicating a detected rotation detected by the rotation sensor (hereinafter referred to as rotation speed information). ), Information indicating the fuel injection amount.
  • FIG. 3 is a block diagram illustrating a configuration example of the HCU 20.
  • the HCU 20 includes a request output unit 210, a determination unit 220, and a motor control unit 230.
  • the request output unit 210 outputs various requests to the ECU 10.
  • the various requests include, for example, a request for stopping the engine 1 (hereinafter referred to as an engine stop request), a request for executing open control (hereinafter referred to as an open control request), and the like.
  • the engine stop request is output, for example, when the traveling vehicle stops traveling (for example, when the amount of depression of the brake pedal is a predetermined value or more, or when the gear is changed from drive to neutral).
  • the engine stop request may be paraphrased as a request for executing the injection stop control and the close control.
  • the stop of the engine 1 includes a temporary stop of the engine 1 (for example, the stop of the engine 1 by idling stop control), and the start of the engine 1 refers to the restart of the engine 1 (For example, the engine 1 is restarted by idling stop control).
  • the determination unit 220 performs various determinations based on the opening degree information or the rotation speed information received from the ECU 10.
  • the determination unit 220 determines whether or not the detected opening indicated by the opening information is equal to or less than the first specified opening.
  • the first specified opening is, for example, 0% or a value larger than 0% but close to 0%.
  • the determination unit 220 determines whether or not the detected opening indicated by the opening information is equal to or greater than the second specified opening.
  • the second specified opening is a value that does not cause negative pressure in the intake manifold 2 when cranking is executed. Further, the second specified opening is a value larger than the first specified opening.
  • the determination unit 220 determines whether or not the detected rotational speed indicated in the rotational speed information is equal to or lower than the first specified rotational speed.
  • the first specified rotational speed is, for example, zero or a value larger than zero but nearly zero.
  • the motor control unit 230 performs cranking control or negative torque generation control as control for the motor 8.
  • the cranking control is a control for outputting a positive torque from the motor 8.
  • the output shaft 9 of the motor 8 rotates in the same direction as the rotation direction of the engine 1, and similarly, the crankshaft 6 also rotates in the same direction as the rotation direction of the engine 1.
  • the negative torque generation control is a control for outputting a negative torque from the motor 8.
  • the output shaft 9 and the crankshaft 6 of the motor 8 brake the rotation of the engine 1.
  • the configuration of the HCU 20 has been described above.
  • FIG. 4 is a sequence chart showing an operation example of the ECU 10 and the HCU 20.
  • the request output unit 210 of the HCU 20 outputs an engine stop request to the ECU 10 (step S101).
  • This engine stop request is output, for example, when an operation is performed to set the brake pedal depression amount to a predetermined amount or more (in other words, the brake is on) in order to stop the traveling vehicle. Is done.
  • the injection control unit 110 executes the injection stop control, and the throttle opening / closing control unit 120 performs the close control (step S102).
  • the engine speed and the opening degree of the throttle valve 4 decrease with time.
  • the information output part 130 outputs opening degree information and rotation speed information to HCU20 (step S103). Note that this output processing is performed a plurality of times at predetermined time intervals.
  • the determination unit 220 determines whether or not the detected opening degree indicated by the opening degree information is equal to or less than the first specified opening degree (step S104).
  • step S104 NO
  • the determination unit 220 determines whether the detected opening indicated in the next received opening information is less than the first specified opening. Determine.
  • the negative torque generation control when the detected opening is not less than the first specified opening, the negative torque generation control is not executed, and when the detected opening is less than the first specified opening, the negative torque generation control is performed. Is executed.
  • the determination unit 220 determines whether or not the detected rotational speed indicated in the rotational speed information is equal to or lower than the first specified rotational speed (step S106).
  • the rotation speed information here is rotation speed information received by the HCU 20 after the negative torque generation control is started.
  • step S106: NO the determination unit 220 determines whether or not the detected rotational speed indicated in the next received rotational speed information is less than or equal to the first specified rotational speed. Determine.
  • step S106 when the detected rotational speed is equal to or lower than the first specified rotational speed (step S106: YES), the motor control unit 230 ends the negative torque generation control, and the request output unit 210 outputs an opening control request to the ECU 10. (Step S107).
  • the throttle opening / closing control unit 120 executes the opening control (step S108). As a result, the opening degree of the throttle valve 4 increases with time.
  • the information output part 130 outputs opening degree information and rotation speed information to HCU20 (step S109). Note that this output processing is performed a plurality of times at predetermined time intervals.
  • the amount of depression of the brake pedal is set to zero (in other words, the brake is in an off state). Assume that an operation has been performed. In other words, it is assumed that a condition for restarting the engine 1 (referred to as a restart condition) is satisfied.
  • the determination unit 220 of the HCU 20 determines whether or not the detected opening indicated by the opening information is equal to or greater than the second specified opening (step S110).
  • step S110: NO the determination unit 220 determines whether or not the detected opening indicated in the received opening information is greater than or equal to the second specified opening. Determine.
  • step S110 when the detected opening is greater than or equal to the second specified opening (step S110: YES), the motor control unit 230 executes cranking control (step S111).
  • cranking control is not executed when the detected opening is equal to or less than the second specified opening, and cranking control is executed when the detected opening is equal to or greater than the second specified opening. Is done.
  • the injection control unit 110 of the ECU 10 executes the injection control when the engine speed reaches the specified value (step S113).
  • the determination unit 220 determines whether or not the detected rotational speed indicated in the rotational speed information is equal to or higher than the second specified rotational speed (step S112).
  • the rotation speed information here is rotation speed information received by the HCU 20 after cranking control is started.
  • step S112 NO
  • the determination unit 220 determines whether or not the detected rotational speed indicated in the next received rotational speed information is equal to or higher than the second specified rotational speed. Determine.
  • step S112 when the detected rotational speed is equal to or higher than the second specified rotational speed (step S112: YES), the motor control unit 230 ends the cranking control (step S114). Thereafter, the engine 1 operates independently.
  • the cranking control is performed when the detected opening is equal to or greater than the second specified opening. As a result, the intake manifold 2 does not become negative pressure, and the throttle valve 4 can be opened.
  • the operation is almost the same as in the above embodiment. That is, immediately after the end of the negative torque generation control, the request output unit 210 outputs an opening control request to the ECU 10. Then, the motor control unit 230 performs cranking control when the detected opening is equal to or greater than the second specified opening. Subsequent operations are the same as those in the embodiment.
  • the motor control unit 230 immediately ends the negative torque generation control when the restart condition is satisfied, and the request output unit 210 outputs an opening control request to the ECU 10. Then, the motor control unit 230 performs cranking control when the detected opening is equal to or greater than the second specified opening. Subsequent operations are the same as those in the embodiment.
  • a control device includes an injection control unit that controls injection of fuel into a cylinder of an internal combustion engine, and a throttle opening / closing control unit that controls opening and closing of a throttle valve provided in an intake passage connected to the internal combustion engine.
  • a determination unit that determines whether or not the opening of the throttle valve is equal to or less than a first specified opening, and a motor that rotates an output shaft connected to a crankshaft of the internal combustion engine via a predetermined member.
  • a motor control unit and when the internal combustion engine being driven is stopped, the motor control unit is controlled to stop the fuel injection by the injection control unit, and the throttle opening / closing
  • the control unit performs control to close the throttle valve and then the determination unit determines that the opening of the throttle valve is equal to or less than the first specified opening Performing a negative torque generation control to output a negative torque from the motor.
  • the determination unit determines whether the rotational speed of the internal combustion engine is equal to or lower than a first specified rotational speed, and the motor control unit When the determination unit determines that the rotation speed of the internal combustion engine is equal to or less than the first specified rotation speed, the negative torque generation control may be terminated.
  • the motor control unit may start the stopped internal combustion engine before the determination unit determines that the rotation speed of the internal combustion engine is equal to or less than the first specified rotation speed.
  • the negative torque generation control may be immediately terminated.
  • the throttle opening / closing control unit may perform control to open the throttle valve after the negative torque generation control is completed.
  • the determination unit determines whether or not an opening of the throttle valve is greater than or equal to a second specified opening, and the motor control unit May perform cranking control for outputting a positive torque from the motor when the determination unit determines that the opening of the throttle valve is greater than or equal to the second specified opening.
  • the determination unit determines whether or not the rotation speed of the internal combustion engine is equal to or higher than a second specified rotation speed after the cranking control is performed, and the motor control unit The cranking control may be terminated when it is determined by the unit that the rotational speed of the internal combustion engine is equal to or higher than the second specified rotational speed.
  • the injection control unit may execute the fuel injection when the rotational speed of the internal combustion engine reaches a specified value after the cranking control is performed.
  • the control method of the present disclosure includes: injection of fuel into a cylinder of an internal combustion engine; opening and closing of a throttle valve provided in an intake passage connected to the internal combustion engine; and a predetermined member on a crankshaft of the internal combustion engine.
  • a control method for controlling driving of a motor that rotates an output shaft connected thereto, and when the internal combustion engine being driven is stopped, the fuel injection is stopped and the throttle valve is
  • the control for closing it is performed, it is determined whether or not the opening of the throttle valve is less than or equal to the first specified opening, and it is determined that the opening of the throttle valve is less than or equal to the first specified opening
  • the negative torque is output from the motor.
  • the present disclosure can be applied to a control device and a control method for performing control when the internal combustion engine is stopped.

Abstract

Provided are a control device and a control method for quickly starting a halted internal combustion engine. An ECU (10) includes an injection control unit (110) that controls injection of fuel into a diesel engine (1), and a throttle opening/closing control unit (120) that controls opening/closing of a throttle valve (4) provided to an intake passage (3). An HCU (20) includes a determination unit (220) that determines whether or not the opening degree of the throttle valve (4) is equal to or less than a first prescribed opening degree, and a motor control unit (230) that controls a motor (8) for rotating an output shaft (9) connected to a crank shaft (6) via an endless belt (7). When the determination unit (220) determines that the opening degree of the throttle valve is equal to or less than the first prescribed opening degree, subsequent to injection stop control performed by the injection control unit (110) and closing control performed by the throttle opening/closing control unit (120), the motor control unit (230) causes the motor (8) to output negative torque.

Description

制御装置および制御方法Control apparatus and control method
　本開示は、内燃機関の停止時に制御を行う制御装置および制御方法に関する。 The present disclosure relates to a control device and a control method for performing control when the internal combustion engine is stopped.
　従来、内燃機関を搭載した車両において、燃費の向上や排ガスの低減を目的として、アイドリングストップ制御が行われることが知られている。アイドリングストップ制御は、車両の停止時には内燃機関を自動的に（運転者の操作によらずに）停止し、車両の発進時には内燃機関を自動的に再始動させる制御である。 Conventionally, it is known that idling stop control is performed in a vehicle equipped with an internal combustion engine for the purpose of improving fuel consumption and reducing exhaust gas. The idling stop control is a control that automatically stops the internal combustion engine (without depending on the driver's operation) when the vehicle stops, and automatically restarts the internal combustion engine when the vehicle starts.
　例えば特許文献１には、アイドリングストップ制御を行う際に、モータジェネレータを発電機として駆動させて負トルクを発生させることにより、内燃機関の回転を停止させる技術が開示されている。 For example, Patent Document 1 discloses a technique for stopping rotation of an internal combustion engine by generating a negative torque by driving a motor generator as a generator when performing idling stop control.
日本国特開２００５－９４４９号公報Japanese Unexamined Patent Publication No. 2005-9449
　しかしながら、アイドリングストップ制御によって内燃機関が停止したときに気筒（シリンダ）内の圧力が高い状態であると、再始動時に残圧により内燃機関の回転が阻害される。その結果、内燃機関の再始動に時間がかかってしまう。 However, when the internal combustion engine is stopped by the idling stop control and the pressure in the cylinder (cylinder) is in a high state, the rotation of the internal combustion engine is inhibited by the residual pressure at the time of restart. As a result, it takes time to restart the internal combustion engine.
　本開示の目的は、停止した内燃機関の速やかな始動を実現できる制御装置および制御方法を提供することである。 An object of the present disclosure is to provide a control device and a control method capable of realizing a quick start of a stopped internal combustion engine.
　本開示の一態様に係る制御装置は、内燃機関の気筒内への燃料の噴射を制御する噴射制御部と、前記内燃機関に接続される吸気通路に設けられたスロットルバルブの開閉を制御するスロットル開閉制御部と、前記スロットルバルブの開度が第１規定開度以下であるか否かを判定する判定部と、前記内燃機関のクランクシャフトに所定部材を介して接続された出力軸を回転させるモータを制御するモータ制御部と、を有し、前記モータ制御部は、駆動中の前記内燃機関の停止が行われる場合、前記噴射制御部によって前記燃料の噴射を停止する制御が行われ、かつ、前記スロットル開閉制御部によって前記スロットルバルブを閉状態にする制御が行われた後、前記判定部によって前記スロットルバルブの開度が前記第１規定開度以下であると判定された場合、前記モータから負トルクを出力させる負トルク発生制御を実行する。 A control device according to an aspect of the present disclosure includes an injection control unit that controls injection of fuel into a cylinder of an internal combustion engine, and a throttle that controls opening and closing of a throttle valve provided in an intake passage connected to the internal combustion engine. An opening / closing control unit, a determination unit for determining whether or not the opening of the throttle valve is equal to or less than a first specified opening, and an output shaft connected to a crankshaft of the internal combustion engine via a predetermined member; A motor control unit that controls a motor, and when the internal combustion engine being driven is stopped, the motor control unit is controlled to stop the fuel injection by the injection control unit, and After the throttle opening / closing control unit performs control to close the throttle valve, the determination unit determines that the throttle valve opening is equal to or less than the first specified opening. If it is a constant, it executes a negative torque generation control to output a negative torque from the motor.
　本開示の一態様に係る制御方法は、内燃機関の気筒内への燃料の噴射と、前記内燃機関に接続される吸気通路に設けられたスロットルバルブの開閉と、および、前記内燃機関のクランクシャフトに所定部材を介して接続された出力軸を回転させるモータの駆動と、を制御する制御方法であって、駆動中の前記内燃機関の停止が行われる場合、前記燃料の噴射を停止するとともに、前記スロットルバルブを閉状態にする制御を行い、前記スロットルバルブの開度が第１規定開度以下であるか否かを判定し、前記スロットルバルブの開度が前記第１規定開度以下であると判定した場合、前記モータから負トルクを出力させる。 A control method according to an aspect of the present disclosure includes injection of fuel into a cylinder of an internal combustion engine, opening and closing of a throttle valve provided in an intake passage connected to the internal combustion engine, and a crankshaft of the internal combustion engine A control method for controlling the driving of a motor that rotates an output shaft connected to a predetermined member, and when the internal combustion engine being driven is stopped, the fuel injection is stopped, and The throttle valve is controlled to be closed, it is determined whether or not the throttle valve opening is equal to or less than a first specified opening, and the throttle valve opening is equal to or less than the first specified opening. If it is determined, negative torque is output from the motor.
　本開示によれば、停止した内燃機関の速やかな始動を実現することができる。 According to the present disclosure, the stopped internal combustion engine can be quickly started.
図１は、本開示の実施の形態に係る内燃機関とその周辺の構成例を示す模式図である。FIG. 1 is a schematic diagram illustrating an example of a configuration of an internal combustion engine and its surroundings according to an embodiment of the present disclosure. 図２は、本開示の実施の形態に係るＥＣＵの構成例を示すブロック図である。FIG. 2 is a block diagram illustrating a configuration example of the ECU according to the embodiment of the present disclosure. 図３は、本開示の実施の形態に係るＨＣＵの構成例を示すブロック図である。FIG. 3 is a block diagram illustrating a configuration example of the HCU according to the embodiment of the present disclosure. 図４は、本開示の実施の形態に係るＥＣＵおよびＨＣＵの動作例を示すシーケンスチャートである。FIG. 4 is a sequence chart illustrating an operation example of the ECU and the HCU according to the embodiment of the present disclosure.
　以下、本開示の実施の形態について、図面を参照して詳細に説明する。 Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.
　まず、本開示の実施の形態に係る内燃機関とその周辺の構成について、図１を用いて説明する。 First, an internal combustion engine according to an embodiment of the present disclosure and the surrounding configuration will be described with reference to FIG.
　図１は、本実施の形態に係る内燃機関とその周辺の構成例を示す模式図である。図１において、破線の矢印は、電気信号の流れを示している。 FIG. 1 is a schematic diagram showing an example of the configuration of an internal combustion engine and its surroundings according to the present embodiment. In FIG. 1, broken arrows indicate the flow of electrical signals.
　図１に示す各構成要素は、例えば、アイドリングストップ制御が行われる車両に搭載される。 1 is mounted on, for example, a vehicle in which idling stop control is performed.
　ディーゼルエンジン（内燃機関の一例。以下、エンジンという）１の上流側には、インテークマニホールド２を介して吸気通路３が接続されている。なお、図示は省略するが、エンジン１の下流側には、エキゾーストマニホールドを介して排気通路が接続されている。 An intake passage 3 is connected to an upstream side of a diesel engine (an example of an internal combustion engine, hereinafter referred to as an engine) 1 via an intake manifold 2. Although not shown, an exhaust passage is connected to the downstream side of the engine 1 via an exhaust manifold.
　吸気通路３には、エンジン１に吸入されるエアの流量を調整するスロットルバルブ４が設けられている。スロットルバルブ４の開度は、ＥＣＵ（Engine Control Unit）１０によって制御される。 The intake passage 3 is provided with a throttle valve 4 that adjusts the flow rate of air sucked into the engine 1. The opening degree of the throttle valve 4 is controlled by an ECU (Engine Control Unit) 10.
　また、吸気通路３には、スロットルバルブ４の開度を検出する開度センサ５が設けられている。開度センサ５は、検出したスロットルバルブ４の開度（以下、検出開度という）を示す信号を、適宜、ＥＣＵ１０へ出力する。 In addition, the intake passage 3 is provided with an opening degree sensor 5 for detecting the opening degree of the throttle valve 4. The opening sensor 5 appropriately outputs a signal indicating the detected opening of the throttle valve 4 (hereinafter referred to as a detected opening) to the ECU 10.
　また、図示は省略するが、エンジン１には、複数の気筒（シリンダ）と、各気筒内に燃料を噴射する燃料噴射装置（インジェクタ）とが備えられている。燃料噴射装置による燃料の噴射動作は、ＥＣＵ１０によって制御される。また、各気筒内には、気筒内を上下に摺動するピストン（図示略）が備えられている。 Although not shown, the engine 1 includes a plurality of cylinders (cylinders) and a fuel injection device (injector) that injects fuel into each cylinder. The fuel injection operation by the fuel injection device is controlled by the ECU 10. Each cylinder is provided with a piston (not shown) that slides up and down in the cylinder.
　クランクシャフト６は、ピストンの上下運動を回転運動に変換するコンロッド（図示略）に接続されている。これにより、クランクシャフト６は回転する。なお、図示は省略するが、クランクシャフト６は、変速機、減速機を介し、車輪に接続された所定のシャフトに接続されている。 The crankshaft 6 is connected to a connecting rod (not shown) that converts the vertical movement of the piston into a rotational movement. Thereby, the crankshaft 6 rotates. In addition, although illustration is abbreviate | omitted, the crankshaft 6 is connected to the predetermined | prescribed shaft connected to the wheel via the transmission and the reduction gear.
　また、クランクシャフト６は、無端ベルトを介してモータジェネレータ（以下、モータという）８の出力軸９に接続されている。出力軸９は、モータ８の駆動によって回転する。モータ８は、ＨＣＵ（Hybrid Control Unit）２０によって制御される。 The crankshaft 6 is connected to an output shaft 9 of a motor generator (hereinafter referred to as a motor) 8 via an endless belt. The output shaft 9 is rotated by driving the motor 8. The motor 8 is controlled by an HCU (Hybrid Control Unit) 20.
　出力軸９の回転運動は、無端ベルト７を介してクランクシャフト６に伝達される。これにより、本実施の形態では、ＢＡＳ（Belted Alternator Starter）が実現される。なお、出力軸９とクランクシャフト６の接続手段は、無端ベルト７に限定されない。 Rotational motion of the output shaft 9 is transmitted to the crankshaft 6 through the endless belt 7. Thereby, in this embodiment, BAS (Belted Alternator Starter) is realized. The connecting means between the output shaft 9 and the crankshaft 6 is not limited to the endless belt 7.
　なお、図示は省略するが、クランクシャフト６には、エンジン１の回転数を検出する回転数センサが設けられている。回転数センサは、検出した回転数（以下、検出回転数という）度を示す信号を、適宜、ＥＣＵ１０へ出力する。 Although not shown, the crankshaft 6 is provided with a rotational speed sensor that detects the rotational speed of the engine 1. The rotation speed sensor appropriately outputs a signal indicating the detected rotation speed (hereinafter referred to as a detected rotation speed) to the ECU 10.
　ＥＣＵ１０およびＨＣＵ２０については、図２、図３を用いて後述する。本実施の形態に係るＥＣＵ１０およびＨＣＵ２０は、「制御装置」の一例に相当する。 The ECU 10 and the HCU 20 will be described later with reference to FIGS. The ECU 10 and the HCU 20 according to the present embodiment correspond to an example of a “control device”.
　以上、本開示の実施の形態に係る内燃機関とその周辺の構成について説明した。 In the above, the internal combustion engine and its peripheral configuration according to the embodiment of the present disclosure have been described.
　次に、ＥＣＵ１０の構成について、図２を用いて説明する。図２は、ＥＣＵ１０の構成例を示すブロック図である。 Next, the configuration of the ECU 10 will be described with reference to FIG. FIG. 2 is a block diagram illustrating a configuration example of the ECU 10.
　ＥＣＵ１０は、噴射制御部１１０、スロットル開閉制御部１２０、および情報出力部１３０を有する。 ECU10 has the injection control part 110, the throttle opening / closing control part 120, and the information output part 130. FIG.
　噴射制御部１１０は、所定のタイミングで所定の量の燃料を噴射するように燃料噴射装置を制御する。以下では、燃料噴射装置に燃料の噴射を実行させる制御を「噴射制御」といい、燃料噴射装置に燃料の噴射を停止させる制御を「噴射停止制御」という。 The injection control unit 110 controls the fuel injection device so as to inject a predetermined amount of fuel at a predetermined timing. Hereinafter, control for causing the fuel injection device to perform fuel injection is referred to as “injection control”, and control for causing the fuel injection device to stop fuel injection is referred to as “injection stop control”.
　スロットル開閉制御部１２０は、スロットルバルブ４を開状態または閉状態に制御する。以下では、スロットルバルブ４を開状態にする制御を「開制御」といい、スロットルバルブ４を閉状態にする制御を「閉制御」という。 The throttle opening / closing control unit 120 controls the throttle valve 4 to be in an open state or a closed state. Hereinafter, the control for opening the throttle valve 4 is referred to as “open control”, and the control for closing the throttle valve 4 is referred to as “closed control”.
　情報出力部１３０は、種々の情報をＨＣＵ２０へ出力する。種々の情報は、例えば、開度センサ４により検出された検出開度を示す情報（以下、開度情報という）、回転数センサにより検出された検出回転数を示す情報（以下、回転数情報という）、燃料の噴射量を示す情報などである。 The information output unit 130 outputs various information to the HCU 20. The various information includes, for example, information indicating a detected opening detected by the opening sensor 4 (hereinafter referred to as opening information), information indicating a detected rotation detected by the rotation sensor (hereinafter referred to as rotation speed information). ), Information indicating the fuel injection amount.
　以上、ＥＣＵ１０の構成について説明した。 The configuration of the ECU 10 has been described above.
　次に、ＨＣＵ２０の構成について、図３を用いて説明する。図３は、ＨＣＵ２０の構成例を示すブロック図である。 Next, the configuration of the HCU 20 will be described with reference to FIG. FIG. 3 is a block diagram illustrating a configuration example of the HCU 20.
　ＨＣＵ２０は、要求出力部２１０、判定部２２０、およびモータ制御部２３０を有する。 The HCU 20 includes a request output unit 210, a determination unit 220, and a motor control unit 230.
　要求出力部２１０は、種々の要求をＥＣＵ１０へ出力する。種々の要求は、例えば、エンジン１を停止させる要求（以下、エンジン停止要求という）、開制御の実行の要求（以下、開制御要求という）などがある。 The request output unit 210 outputs various requests to the ECU 10. The various requests include, for example, a request for stopping the engine 1 (hereinafter referred to as an engine stop request), a request for executing open control (hereinafter referred to as an open control request), and the like.
　エンジン停止要求は、例えば、走行中の車両が走行を停止したとき（例えば、ブレーキペダルの踏込量が所定値以上であるときや、ギアがドライブからニュートラルに変更されたときなど）に出力される。なお、エンジン停止要求は、噴射停止制御および閉制御の実行の要求と言い換えてもよい。 The engine stop request is output, for example, when the traveling vehicle stops traveling (for example, when the amount of depression of the brake pedal is a predetermined value or more, or when the gear is changed from drive to neutral). . The engine stop request may be paraphrased as a request for executing the injection stop control and the close control.
　開制御要求は、例えば、負トルク発生制御が終了した場合に出力される。 The open control request is output, for example, when the negative torque generation control is completed.
　なお、本実施の形態において、エンジン１の停止とは、エンジン１の一時的な停止（例えば、アイドリングストップ制御によるエンジン１の停止）を含むものとし、エンジン１の始動とは、エンジン１の再始動（例えば、アイドリングストップ制御によるエンジン１の再始動）を含むものとする。 In the present embodiment, the stop of the engine 1 includes a temporary stop of the engine 1 (for example, the stop of the engine 1 by idling stop control), and the start of the engine 1 refers to the restart of the engine 1 (For example, the engine 1 is restarted by idling stop control).
　判定部２２０は、ＥＣＵ１０から受け取った開度情報または回転数情報に基づいて、種々の判定を行う。 The determination unit 220 performs various determinations based on the opening degree information or the rotation speed information received from the ECU 10.
　例えば、判定部２２０は、開度情報に示される検出開度が第１規定開度以下であるか否かを判定する。第１規定開度とは、例えば、０％、または、０％より大きいが０％に近い値である。 For example, the determination unit 220 determines whether or not the detected opening indicated by the opening information is equal to or less than the first specified opening. The first specified opening is, for example, 0% or a value larger than 0% but close to 0%.
　また、例えば、判定部２２０は、開度情報に示される検出開度が第２規定開度以上であるか否かを判定する。第２規定開度とは、クランキングが実行された際にインテークマニホールド２内が負圧にならない値である。また、第２規定開度は、第１規定開度より大きい値である。 Further, for example, the determination unit 220 determines whether or not the detected opening indicated by the opening information is equal to or greater than the second specified opening. The second specified opening is a value that does not cause negative pressure in the intake manifold 2 when cranking is executed. Further, the second specified opening is a value larger than the first specified opening.
　また、例えば、判定部２２０は、回転数情報に示される検出回転数が第１規定回転数以下であるか否かを判定する。第１規定回転数とは、例えば、ゼロ、または、ゼロより大きいがほぼゼロに近い値である。 For example, the determination unit 220 determines whether or not the detected rotational speed indicated in the rotational speed information is equal to or lower than the first specified rotational speed. The first specified rotational speed is, for example, zero or a value larger than zero but nearly zero.
　また、例えば、判定部２２０は、回転数情報に示される検出回転数が第２規定回転数以上であるか否かを判定する。第２規定回転数とは、例えば、クランキングの実行により上昇しうる回転数の上限値、または、その上限値より小さいが上限値に近い値である。 For example, the determination unit 220 determines whether or not the detected rotational speed indicated in the rotational speed information is equal to or greater than the second specified rotational speed. The second specified rotational speed is, for example, an upper limit value of the rotational speed that can be increased by execution of cranking, or a value that is smaller than the upper limit value but close to the upper limit value.
　モータ制御部２３０は、モータ８に対する制御として、クランキング制御または負トルク発生制御を行う。 The motor control unit 230 performs cranking control or negative torque generation control as control for the motor 8.
　クランキング制御とは、モータ８から正トルクを出力させる制御である。このクランキング制御により、モータ８の出力軸９は、エンジン１の回転方向と同方向に回転し、これと同様に、クランクシャフト６も、エンジン１の回転方向と同方向に回転する。 The cranking control is a control for outputting a positive torque from the motor 8. By this cranking control, the output shaft 9 of the motor 8 rotates in the same direction as the rotation direction of the engine 1, and similarly, the crankshaft 6 also rotates in the same direction as the rotation direction of the engine 1.
　負トルク発生制御とは、モータ８から負トルクを出力させる制御である。この負トルク発生制御により、モータ８の出力軸９およびクランクシャフト６は、エンジン１の回転を制動する。 The negative torque generation control is a control for outputting a negative torque from the motor 8. By this negative torque generation control, the output shaft 9 and the crankshaft 6 of the motor 8 brake the rotation of the engine 1.
　以上、ＨＣＵ２０の構成について説明した。 The configuration of the HCU 20 has been described above.
　次に、ＥＣＵ１０およびＨＣＵ２０の動作について、図４を用いて説明する。図４は、ＥＣＵ１０およびＨＣＵ２０の動作例を示すシーケンスチャートである。 Next, operations of the ECU 10 and the HCU 20 will be described with reference to FIG. FIG. 4 is a sequence chart showing an operation example of the ECU 10 and the HCU 20.
　まず、ＨＣＵ２０の要求出力部２１０は、エンジン停止要求をＥＣＵ１０へ出力する（ステップＳ１０１）。このエンジン停止要求は、例えば、走行中の車両の走行を停止させるために、ブレーキペダルの踏込量を所定量以上（換言すれば、ブレーキをオン状態）にする操作が行われたときに、出力される。 First, the request output unit 210 of the HCU 20 outputs an engine stop request to the ECU 10 (step S101). This engine stop request is output, for example, when an operation is performed to set the brake pedal depression amount to a predetermined amount or more (in other words, the brake is on) in order to stop the traveling vehicle. Is done.
　ＥＣＵ１０がエンジン停止要求を受け取ると、噴射制御部１１０は、噴射停止制御を実行し、スロットル開閉制御部１２０は、閉制御を行う（ステップＳ１０２）。これにより、エンジン回転数およびスロットルバルブ４の開度は、時間の経過とともに低下する。 When the ECU 10 receives the engine stop request, the injection control unit 110 executes the injection stop control, and the throttle opening / closing control unit 120 performs the close control (step S102). As a result, the engine speed and the opening degree of the throttle valve 4 decrease with time.
　そして、情報出力部１３０は、開度情報および回転数情報をＨＣＵ２０へ出力する（ステップＳ１０３）。なお、この出力処理は、所定の時間間隔で複数回行われるとする。 And the information output part 130 outputs opening degree information and rotation speed information to HCU20 (step S103). Note that this output processing is performed a plurality of times at predetermined time intervals.
　ＨＣＵ２０が開度情報および回転数情報を受け取ると、判定部２２０は、開度情報に示される検出開度が第１規定開度以下であるか否かを判定する（ステップＳ１０４）。 When the HCU 20 receives the opening degree information and the rotation speed information, the determination unit 220 determines whether or not the detected opening degree indicated by the opening degree information is equal to or less than the first specified opening degree (step S104).
　検出開度が第１規定開度以下ではない場合（ステップＳ１０４：ＮＯ）、判定部２２０は、次に受け取った開度情報に示される検出開度が第１規定開度以下であるか否かを判定する。 When the detected opening is not less than the first specified opening (step S104: NO), the determination unit 220 determines whether the detected opening indicated in the next received opening information is less than the first specified opening. Determine.
　一方、検出開度が第１規定開度以下である場合（ステップＳ１０４：ＹＥＳ）、モータ制御部２３０は、負トルク発生制御を実行する（ステップＳ１０５）。 On the other hand, when the detected opening is not more than the first specified opening (step S104: YES), the motor control unit 230 executes negative torque generation control (step S105).
　このように、本実施の形態では、検出開度が第１規定開度以下ではない場合は負トルク発生制御が実行されず、検出開度が第１規定開度以下となったら負トルク発生制御が実行される。 Thus, in the present embodiment, when the detected opening is not less than the first specified opening, the negative torque generation control is not executed, and when the detected opening is less than the first specified opening, the negative torque generation control is performed. Is executed.
　この負トルク発生制御により、上述したとおり、モータ８の出力軸９およびクランクシャフト６がエンジン１の回転を制動する。よって、低下中のエンジン回転数をより速やかに低下させることができる。 By this negative torque generation control, the output shaft 9 and the crankshaft 6 of the motor 8 brake the rotation of the engine 1 as described above. As a result, the engine speed being reduced can be reduced more quickly.
　次に、判定部２２０は、回転数情報に示される検出回転数が第１規定回転数以下であるか否かを判定する（ステップＳ１０６）。ここでの回転数情報は、負トルク発生制御が開始された後にＨＣＵ２０が受け取った回転数情報である。 Next, the determination unit 220 determines whether or not the detected rotational speed indicated in the rotational speed information is equal to or lower than the first specified rotational speed (step S106). The rotation speed information here is rotation speed information received by the HCU 20 after the negative torque generation control is started.
　検出回転数が第１規定回転数以下ではない場合（ステップＳ１０６：ＮＯ）、判定部２２０は、次に受け取った回転数情報に示される検出回転数が第１規定回転数以下であるか否かを判定する。 When the detected rotational speed is not less than or equal to the first specified rotational speed (step S106: NO), the determination unit 220 determines whether or not the detected rotational speed indicated in the next received rotational speed information is less than or equal to the first specified rotational speed. Determine.
　一方、検出回転数が第１規定回転数以下である場合（ステップＳ１０６：ＹＥＳ）、モータ制御部２３０は、負トルク発生制御を終了し、要求出力部２１０は、開制御要求をＥＣＵ１０へ出力する（ステップＳ１０７）。 On the other hand, when the detected rotational speed is equal to or lower than the first specified rotational speed (step S106: YES), the motor control unit 230 ends the negative torque generation control, and the request output unit 210 outputs an opening control request to the ECU 10. (Step S107).
　ＥＣＵ１０が開制御要求を受け取ると、スロットル開閉制御部１２０は、開制御を実行する（ステップＳ１０８）。これにより、スロットルバルブ４の開度は、時間の経過とともに上昇する。 When the ECU 10 receives the opening control request, the throttle opening / closing control unit 120 executes the opening control (step S108). As a result, the opening degree of the throttle valve 4 increases with time.
　そして、情報出力部１３０は、開度情報および回転数情報をＨＣＵ２０へ出力する（ステップＳ１０９）。なお、この出力処理は、所定の時間間隔で複数回行われるとする。 And the information output part 130 outputs opening degree information and rotation speed information to HCU20 (step S109). Note that this output processing is performed a plurality of times at predetermined time intervals.
　ここで、例えば、負トルク発生制御の終了後ある程度の時間が経過してから、停止中の車両を発進させるために、ブレーキペダルの踏込量をゼロ（換言すれば、ブレーキをオフ状態）にする操作が行われたとする。換言すれば、エンジン１が再始動する条件（再始動条件という）が満たされたとする。 Here, for example, after a certain amount of time has elapsed after the end of the negative torque generation control, in order to start the stopped vehicle, the amount of depression of the brake pedal is set to zero (in other words, the brake is in an off state). Assume that an operation has been performed. In other words, it is assumed that a condition for restarting the engine 1 (referred to as a restart condition) is satisfied.
　ＨＣＵ２０の判定部２２０は、開度情報に示される検出開度が第２規定開度以上であるか否かを判定する（ステップＳ１１０）。 The determination unit 220 of the HCU 20 determines whether or not the detected opening indicated by the opening information is equal to or greater than the second specified opening (step S110).
　検出開度が第２規定開度以上ではない場合（ステップＳ１１０：ＮＯ）、判定部２２０は、次に受け取った開度情報に示される検出開度が第２規定開度以上であるか否かを判定する。 When the detected opening is not greater than or equal to the second specified opening (step S110: NO), the determination unit 220 determines whether or not the detected opening indicated in the received opening information is greater than or equal to the second specified opening. Determine.
　一方、検出開度が第２規定開度以上である場合（ステップＳ１１０：ＹＥＳ）、モータ制御部２３０は、クランキング制御を実行する（ステップＳ１１１）。 On the other hand, when the detected opening is greater than or equal to the second specified opening (step S110: YES), the motor control unit 230 executes cranking control (step S111).
　このように、本実施の形態では、検出開度が第２規定開度以下である場合はクランキング制御が実行されず、検出開度が第２規定開度以上となったらクランキング制御が実行される。 Thus, in the present embodiment, cranking control is not executed when the detected opening is equal to or less than the second specified opening, and cranking control is executed when the detected opening is equal to or greater than the second specified opening. Is done.
　このクランキング制御により、上述したとおり、モータ８の出力軸９がエンジン１の回転方向と同方向に回転し、クランクシャフト６も、エンジン１の回転方向と同方向に回転する。よって、時間の経過とともにエンジン回転数が上昇する。 By this cranking control, as described above, the output shaft 9 of the motor 8 rotates in the same direction as the rotation direction of the engine 1, and the crankshaft 6 also rotates in the same direction as the rotation direction of the engine 1. Therefore, the engine speed increases with the passage of time.
　その後、ＥＣＵ１０の噴射制御部１１０は、エンジン回転数が規定値に達すると、噴射制御を実行する（ステップＳ１１３）。 After that, the injection control unit 110 of the ECU 10 executes the injection control when the engine speed reaches the specified value (step S113).
　一方、判定部２２０は、回転数情報に示される検出回転数が第２規定回転数以上であるか否かを判定する（ステップＳ１１２）。ここでの回転数情報は、クランキング制御が開始された後にＨＣＵ２０が受け取った回転数情報である。 On the other hand, the determination unit 220 determines whether or not the detected rotational speed indicated in the rotational speed information is equal to or higher than the second specified rotational speed (step S112). The rotation speed information here is rotation speed information received by the HCU 20 after cranking control is started.
　検出回転数が第２規定回転数以上ではない場合（ステップＳ１１２：ＮＯ）、判定部２２０は、次に受け取った回転数情報に示される検出回転数が第２規定回転数以上であるか否かを判定する。 When the detected rotational speed is not equal to or higher than the second specified rotational speed (step S112: NO), the determination unit 220 determines whether or not the detected rotational speed indicated in the next received rotational speed information is equal to or higher than the second specified rotational speed. Determine.
　一方、検出回転数が第２規定回転数以上である場合（ステップＳ１１２：ＹＥＳ）、モータ制御部２３０は、クランキング制御を終了する（ステップＳ１１４）。その後、エンジン１は、自立運転する。 On the other hand, when the detected rotational speed is equal to or higher than the second specified rotational speed (step S112: YES), the motor control unit 230 ends the cranking control (step S114). Thereafter, the engine 1 operates independently.
　以上、ＥＣＵ１０およびＨＣＵ２０の動作について説明した。 The operation of the ECU 10 and the HCU 20 has been described above.
　次に、本実施の形態の作用効果について説明する。 Next, the function and effect of this embodiment will be described.
　本実施の形態によれば、駆動中のエンジン１を停止する場合、噴射停止制御および閉制御を実行した後、検出開度が第１規定開度以下となったら負トルク発生制御を実行する。これにより、エンジン１の停止時に気筒の内圧を低下させることができ、エンジン１を再始動する場合、気筒内の残圧によりエンジン１の回転が阻害されることがない。したがって、エンジン１を速やかに始動できる。なお、第１規定スロットル開度以下となる前に負トルク発生制御を実行したとすると、気筒の内圧を負圧にできずにエンジン１を停止させてしまう。そのため、エンジン１を速やかに再始動することはできない。 According to this embodiment, when stopping the engine 1 that is being driven, after executing the injection stop control and the closing control, the negative torque generation control is executed when the detected opening becomes equal to or less than the first specified opening. Thereby, the internal pressure of the cylinder can be reduced when the engine 1 is stopped, and when the engine 1 is restarted, the rotation of the engine 1 is not hindered by the residual pressure in the cylinder. Therefore, the engine 1 can be started quickly. If the negative torque generation control is executed before the first specified throttle opening or less, the internal pressure of the cylinder cannot be made negative and the engine 1 is stopped. Therefore, the engine 1 cannot be restarted promptly.
　また、本実施の形態によれば、負トルク発生制御によってクランクシャフト６をエンジン１の回転を制動させる。よって、エンジン回転数をより速やかに停止させることができ、振動の発生を抑制できる。その結果、乗員の不快感を低減できる。 Further, according to the present embodiment, the crankshaft 6 is braked to rotate the engine 1 by negative torque generation control. Therefore, the engine speed can be stopped more quickly, and the occurrence of vibration can be suppressed. As a result, passenger discomfort can be reduced.
　このように、本実施の形態によれば、内燃機関の速やかな停止と、停止した内燃機関の速やかな始動との両立を実現することができる。 Thus, according to the present embodiment, it is possible to realize both a quick stop of the internal combustion engine and a quick start of the stopped internal combustion engine.
　また、エンジン１を再始動する場合において、スロットルバルブ４が閉状態のままクランキングが行われると、インテークマニホールド２内が負圧になり、スロットルバルブ４が開状態にならないおそれがある。そこで、本実施の形態では、エンジン１を再始動する場合、開制御を実行した後、検出開度が第２規定開度以上となったらクランキング制御を実行する。これにより、インテークマニホールド２内が負圧にならず、スロットルバルブ４を開状態にできる。 Further, when the engine 1 is restarted, if cranking is performed while the throttle valve 4 is closed, the inside of the intake manifold 2 becomes negative pressure and the throttle valve 4 may not be opened. Therefore, in the present embodiment, when the engine 1 is restarted, after performing the opening control, the cranking control is performed when the detected opening is equal to or greater than the second specified opening. As a result, the intake manifold 2 does not become negative pressure, and the throttle valve 4 can be opened.
　以上、本実施の形態の作用効果について説明した。 In the above, the effect of this Embodiment was demonstrated.
　以上、本開示の実施の形態について詳述してきたが、本開示は、上述の実施の形態に限定されるものではなく、本開示の趣旨を逸脱しない範囲で、適宜変形して実施することが可能である。以下、各変形例について説明する。 Although the embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to the above-described embodiments, and may be appropriately modified and implemented without departing from the spirit of the present disclosure. Is possible. Hereinafter, each modification will be described.
　［変形例１］
　上記実施の形態では、負トルク発生制御の終了後ある程度の時間が経過してから、再始動条件が満たされた場合を例に挙げて説明したが、その場合以外について、以下に説明する。 [Modification 1]
In the above embodiment, the case where the restart condition is satisfied after a certain amount of time has elapsed after the end of the negative torque generation control has been described as an example, but other cases will be described below.
　まず、負トルク発生制御の終了直後に再始動条件が満たされた場合について説明する。 First, the case where the restart condition is satisfied immediately after the end of the negative torque generation control will be described.
　この場合は、上記実施の形態とほぼ同様の動作となる。すなわち、負トルク発生制御の終了直後に、要求出力部２１０は、開制御要求をＥＣＵ１０へ出力する。そして、モータ制御部２３０は、検出開度が第２規定開度以上となったらクランキング制御を実行する。その後の動作は、実施の形態と同じである。 In this case, the operation is almost the same as in the above embodiment. That is, immediately after the end of the negative torque generation control, the request output unit 210 outputs an opening control request to the ECU 10. Then, the motor control unit 230 performs cranking control when the detected opening is equal to or greater than the second specified opening. Subsequent operations are the same as those in the embodiment.
　次に、負トルク発生制御の終了前に（検出回転数が第１規定回転数以下となる前に）再始動条件が満たされた場合について説明する。 Next, the case where the restart condition is satisfied before the end of the negative torque generation control (before the detected rotation speed becomes equal to or less than the first specified rotation speed) will be described.
　この場合、モータ制御部２３０は、再始動条件が満たされた時点で直ちに負トルク発生制御を終了し、要求出力部２１０は、開制御要求をＥＣＵ１０へ出力する。そして、モータ制御部２３０は、検出開度が第２規定開度以上となったらクランキング制御を実行する。その後の動作は、実施の形態と同じである。 In this case, the motor control unit 230 immediately ends the negative torque generation control when the restart condition is satisfied, and the request output unit 210 outputs an opening control request to the ECU 10. Then, the motor control unit 230 performs cranking control when the detected opening is equal to or greater than the second specified opening. Subsequent operations are the same as those in the embodiment.
　［変形例２］
　上記実施の形態では、内燃機関がディーゼルエンジンである場合を例に挙げて説明したが、内燃機関はガソリンエンジンであってもよい。 [Modification 2]
Although the case where the internal combustion engine is a diesel engine has been described as an example in the above embodiment, the internal combustion engine may be a gasoline engine.
　＜本開示のまとめ＞
　本開示の制御装置は、内燃機関の気筒内への燃料の噴射を制御する噴射制御部と、前記内燃機関に接続される吸気通路に設けられたスロットルバルブの開閉を制御するスロットル開閉制御部と、前記スロットルバルブの開度が第１規定開度以下であるか否かを判定する判定部と、前記内燃機関のクランクシャフトに所定部材を介して接続された出力軸を回転させるモータを制御するモータ制御部と、を有し、前記モータ制御部は、駆動中の前記内燃機関の停止が行われる場合、前記噴射制御部によって前記燃料の噴射を停止する制御が行われ、かつ、前記スロットル開閉制御部によって前記スロットルバルブを閉状態にする制御が行われた後、前記判定部によって前記スロットルバルブの開度が前記第１規定開度以下であると判定された場合、前記モータから負トルクを出力させる負トルク発生制御を実行する。 <Summary of this disclosure>
A control device according to the present disclosure includes an injection control unit that controls injection of fuel into a cylinder of an internal combustion engine, and a throttle opening / closing control unit that controls opening and closing of a throttle valve provided in an intake passage connected to the internal combustion engine. A determination unit that determines whether or not the opening of the throttle valve is equal to or less than a first specified opening, and a motor that rotates an output shaft connected to a crankshaft of the internal combustion engine via a predetermined member. A motor control unit, and when the internal combustion engine being driven is stopped, the motor control unit is controlled to stop the fuel injection by the injection control unit, and the throttle opening / closing When the control unit performs control to close the throttle valve and then the determination unit determines that the opening of the throttle valve is equal to or less than the first specified opening Performing a negative torque generation control to output a negative torque from the motor.
　なお、上記制御装置において、前記判定部は、前記負トルク発生制御の実行後、前記内燃機関の回転数が第１規定回転数以下であるか否かを判定し、前記モータ制御部は、前記判定部によって前記内燃機関の回転数が前記第１規定回転数以下であると判定された場合、前記負トルク発生制御を終了してもよい。 In the control device, after the execution of the negative torque generation control, the determination unit determines whether the rotational speed of the internal combustion engine is equal to or lower than a first specified rotational speed, and the motor control unit When the determination unit determines that the rotation speed of the internal combustion engine is equal to or less than the first specified rotation speed, the negative torque generation control may be terminated.
　また、上記制御装置において、前記モータ制御部は、前記判定部によって前記内燃機関の回転数が前記第１規定回転数以下であると判定される前に停止中の前記内燃機関が始動される場合、直ちに前記負トルク発生制御を終了してもよい。 In the control device, the motor control unit may start the stopped internal combustion engine before the determination unit determines that the rotation speed of the internal combustion engine is equal to or less than the first specified rotation speed. The negative torque generation control may be immediately terminated.
　また、上記制御装置において、前記スロットル開閉制御部は、前記負トルク発生制御の終了後に、前記スロットルバルブを開状態にする制御を行ってもよい。 Further, in the control device, the throttle opening / closing control unit may perform control to open the throttle valve after the negative torque generation control is completed.
　また、上記制御装置において、前記判定部は、停止中の前記内燃機関が始動される場合、前記スロットルバルブの開度が第２規定開度以上であるか否かを判定し、前記モータ制御部は、前記判定部によって前記スロットルバルブの開度が前記第２規定開度以上であると判定された場合、前記モータから正トルクを出力させるクランキング制御を実行してもよい。 Further, in the above control device, when the internal combustion engine being stopped is started, the determination unit determines whether or not an opening of the throttle valve is greater than or equal to a second specified opening, and the motor control unit May perform cranking control for outputting a positive torque from the motor when the determination unit determines that the opening of the throttle valve is greater than or equal to the second specified opening.
　また、上記制御装置において、前記判定部は、前記クランキング制御の実行後、前記内燃機関の回転数が第２規定回転数以上であるか否かを判定し、前記モータ制御部は、前記判定部によって前記内燃機関の回転数が前記第２規定回転数以上であると判定された場合、前記クランキング制御を終了してもよい。 In the control device, the determination unit determines whether or not the rotation speed of the internal combustion engine is equal to or higher than a second specified rotation speed after the cranking control is performed, and the motor control unit The cranking control may be terminated when it is determined by the unit that the rotational speed of the internal combustion engine is equal to or higher than the second specified rotational speed.
　また、上記制御装置において、前記噴射制御部は、前記クランキング制御の実行後、前記内燃機関の回転数が規定値に達した場合、前記燃料の噴射を実行してもよい。 In the above control device, the injection control unit may execute the fuel injection when the rotational speed of the internal combustion engine reaches a specified value after the cranking control is performed.
　本開示の制御方法は、内燃機関の気筒内への燃料の噴射と、前記内燃機関に接続される吸気通路に設けられたスロットルバルブの開閉と、および、前記内燃機関のクランクシャフトに所定部材を介して接続された出力軸を回転させるモータの駆動と、を制御する制御方法であって、駆動中の前記内燃機関の停止が行われる場合、前記燃料の噴射を停止するとともに、前記スロットルバルブを閉状態にする制御を行い、前記スロットルバルブの開度が第１規定開度以下であるか否かを判定し、前記スロットルバルブの開度が前記第１規定開度以下であると判定した場合、前記モータから負トルクを出力させる。 The control method of the present disclosure includes: injection of fuel into a cylinder of an internal combustion engine; opening and closing of a throttle valve provided in an intake passage connected to the internal combustion engine; and a predetermined member on a crankshaft of the internal combustion engine. A control method for controlling driving of a motor that rotates an output shaft connected thereto, and when the internal combustion engine being driven is stopped, the fuel injection is stopped and the throttle valve is When the control for closing is performed, it is determined whether or not the opening of the throttle valve is less than or equal to the first specified opening, and it is determined that the opening of the throttle valve is less than or equal to the first specified opening The negative torque is output from the motor.
　本出願は、２０１７年５月１６日付で出願された日本国特許出願（特願２０１７－０９７０９６）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 (Japanese Patent Application No. 2017-097096) filed on May 16, 2017, the contents of which are incorporated herein by reference.
　本開示は、内燃機関の停止時に制御を行う制御装置および制御方法に適用できる。 The present disclosure can be applied to a control device and a control method for performing control when the internal combustion engine is stopped.
　１　ディーゼルエンジン
　２　インテークマニホールド
　３　吸気通路
　４　スロットルバルブ
　５　開度センサ
　６　クランクシャフト
　７　無端ベルト
　８　モータジェネレータ
　９　出力軸
　１０　ＥＣＵ
　２０　ＨＣＵ
　１１０　噴射制御部
　１２０　スロットル開閉制御部
　１３０　情報出力部
　２１０　要求出力部
　２２０　判定部
　２３０　モータ制御部 1 Diesel Engine 2 Intake Manifold 3 Intake Passage 4 Throttle Valve 5 Opening Sensor 6 Crankshaft 7 Endless Belt 8 Motor Generator 9 Output Shaft 10 ECU
20 HCU
DESCRIPTION OF SYMBOLS 110 Injection control part 120 Throttle opening / closing control part 130 Information output part 210 Request output part 220 Judgment part 230 Motor control part

Claims (8)

  1. 　内燃機関の気筒内への燃料の噴射を制御する噴射制御部と、
    　前記内燃機関に接続される吸気通路に設けられたスロットルバルブの開閉を制御するスロットル開閉制御部と、
    　前記スロットルバルブの開度が第１規定開度以下であるか否かを判定する判定部と、
    　前記内燃機関のクランクシャフトに所定部材を介して接続された出力軸を回転させるモータを制御するモータ制御部と、を有し、
    　前記モータ制御部は、
    　駆動中の前記内燃機関の停止が行われる場合、前記噴射制御部によって前記燃料の噴射を停止する制御が行われ、かつ、前記スロットル開閉制御部によって前記スロットルバルブを閉状態にする制御が行われた後、前記判定部によって前記スロットルバルブの開度が前記第１規定開度以下であると判定された場合、前記モータから負トルクを出力させる負トルク発生制御を実行する、
    　制御装置。     An injection control unit that controls injection of fuel into a cylinder of the internal combustion engine;
    A throttle opening / closing control unit for controlling opening / closing of a throttle valve provided in an intake passage connected to the internal combustion engine;
    A determination unit that determines whether or not an opening of the throttle valve is equal to or less than a first specified opening;
    A motor control unit that controls a motor that rotates an output shaft connected to a crankshaft of the internal combustion engine via a predetermined member;
    The motor controller is
    When the internal combustion engine being driven is stopped, the injection control unit performs control to stop the fuel injection, and the throttle opening / closing control unit performs control to close the throttle valve. After that, when the determination unit determines that the opening of the throttle valve is equal to or less than the first specified opening, a negative torque generation control is performed to output a negative torque from the motor.
    Control device.
  2. 　前記判定部は、
    　前記負トルク発生制御の実行後、前記内燃機関の回転数が第１規定回転数以下であるか否かを判定し、
    　前記モータ制御部は、
    　前記判定部によって前記内燃機関の回転数が前記第１規定回転数以下であると判定された場合、前記負トルク発生制御を終了する、
    　請求項１に記載の制御装置。     The determination unit
    After execution of the negative torque generation control, it is determined whether or not the rotational speed of the internal combustion engine is equal to or lower than a first specified rotational speed,
    The motor controller is
    If the determination unit determines that the rotational speed of the internal combustion engine is equal to or lower than the first specified rotational speed, the negative torque generation control is terminated.
    The control device according to claim 1.
  3. 　前記モータ制御部は、
    　前記判定部によって前記内燃機関の回転数が前記第１規定回転数以下であると判定される前に停止中の前記内燃機関が始動される場合、直ちに前記負トルク発生制御を終了する、
    　請求項２に記載の制御装置。     The motor controller is
    When the stopped internal combustion engine is started before the determination unit determines that the rotational speed of the internal combustion engine is equal to or lower than the first specified rotational speed, the negative torque generation control is immediately terminated.
    The control device according to claim 2.
  4. 　前記スロットル開閉制御部は、
    　前記負トルク発生制御の終了後に、前記スロットルバルブを開状態にする制御を行う、
    　請求項２に記載の制御装置。     The throttle opening / closing controller is
    After the end of the negative torque generation control, control to open the throttle valve,
    The control device according to claim 2.
  5. 　前記判定部は、
    　停止中の前記内燃機関が始動される場合、前記スロットルバルブの開度が第２規定開度以上であるか否かを判定し、
    　前記モータ制御部は、
    　前記判定部によって前記スロットルバルブの開度が前記第２規定開度以上であると判定された場合、前記モータから正トルクを出力させるクランキング制御を実行する、
    　請求項４に記載の制御装置。     The determination unit
    When the stopped internal combustion engine is started, it is determined whether the opening of the throttle valve is equal to or greater than a second specified opening;
    The motor controller is
    Cranking control for outputting a positive torque from the motor when the determination unit determines that the opening of the throttle valve is greater than or equal to the second specified opening;
    The control device according to claim 4.
  6. 　前記判定部は、
    　前記クランキング制御の実行後、前記内燃機関の回転数が第２規定回転数以上であるか否かを判定し、
    　前記モータ制御部は、
    　前記判定部によって前記内燃機関の回転数が前記第２規定回転数以上であると判定された場合、前記クランキング制御を終了する、
    　請求項５に記載の制御装置。     The determination unit
    After executing the cranking control, it is determined whether or not the rotational speed of the internal combustion engine is equal to or higher than a second specified rotational speed,
    The motor controller is
    If the determination unit determines that the rotational speed of the internal combustion engine is greater than or equal to the second specified rotational speed, the cranking control is terminated.
    The control device according to claim 5.
  7. 　前記噴射制御部は、
    　前記クランキング制御の実行後、前記内燃機関の回転数が規定値に達した場合、前記燃料の噴射を実行する、
    　請求項５に記載の制御装置。     The injection control unit
    After the cranking control is executed, when the rotational speed of the internal combustion engine reaches a specified value, the fuel injection is executed.
    The control device according to claim 5.
  8. 　内燃機関の気筒内への燃料の噴射と、前記内燃機関に接続される吸気通路に設けられたスロットルバルブの開閉と、および、前記内燃機関のクランクシャフトに所定部材を介して接続された出力軸を回転させるモータの駆動と、を制御する制御方法であって、
    　駆動中の前記内燃機関の停止が行われる場合、前記燃料の噴射を停止するとともに、前記スロットルバルブを閉状態にする制御を行い、
    　前記スロットルバルブの開度が第１規定開度以下であるか否かを判定し、
    　前記スロットルバルブの開度が前記第１規定開度以下であると判定した場合、前記モータから負トルクを出力させる、
    　制御方法。     Fuel injection into a cylinder of the internal combustion engine, opening / closing of a throttle valve provided in an intake passage connected to the internal combustion engine, and an output shaft connected to a crankshaft of the internal combustion engine via a predetermined member A control method for controlling driving of a motor for rotating the motor,
    When the driving of the internal combustion engine is stopped, the fuel injection is stopped and the throttle valve is closed.
    Determining whether the opening of the throttle valve is equal to or less than a first specified opening;
    When it is determined that the opening of the throttle valve is equal to or less than the first specified opening, a negative torque is output from the motor.
    Control method.
PCT/JP2018/018757 2017-05-16 2018-05-15 Control device and control method WO2018212178A1 (en)

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