WO2013187101A1 - エンジン始動装置およびエンジン始動方法 - Google Patents
エンジン始動装置およびエンジン始動方法 Download PDFInfo
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- WO2013187101A1 WO2013187101A1 PCT/JP2013/057785 JP2013057785W WO2013187101A1 WO 2013187101 A1 WO2013187101 A1 WO 2013187101A1 JP 2013057785 W JP2013057785 W JP 2013057785W WO 2013187101 A1 WO2013187101 A1 WO 2013187101A1
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- engine
- pinion gear
- fuel injection
- starter
- satisfied
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/065—Introducing corrections for particular operating conditions for engine starting or warming up for starting at hot start or restart
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0844—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop with means for restarting the engine directly after an engine stop request, e.g. caused by change of driver mind
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0851—Circuits or control means specially adapted for starting of engines characterised by means for controlling the engagement or disengagement between engine and starter, e.g. meshing of pinion and engine gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
- F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
- F02N15/067—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement the starter comprising an electro-magnetically actuated lever
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/15—Digital data processing
- F02P5/1502—Digital data processing using one central computing unit
- F02P5/1506—Digital data processing using one central computing unit with particular means during starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/155—Analogue data processing
- F02P5/1558—Analogue data processing with special measures for starting
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
- F02D2041/0092—Synchronisation of the cylinders at engine start
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0851—Circuits or control means specially adapted for starting of engines characterised by means for controlling the engagement or disengagement between engine and starter, e.g. meshing of pinion and engine gear
- F02N11/0855—Circuits or control means specially adapted for starting of engines characterised by means for controlling the engagement or disengagement between engine and starter, e.g. meshing of pinion and engine gear during engine shutdown or after engine stop before start command, e.g. pre-engagement of pinion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N2019/002—Aiding engine start by acting on fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
- F02N2200/022—Engine speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2300/00—Control related aspects of engine starting
- F02N2300/20—Control related aspects of engine starting characterised by the control method
- F02N2300/2002—Control related aspects of engine starting characterised by the control method using different starting modes, methods, or actuators depending on circumstances, e.g. engine temperature or component wear
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention is used in an engine automatic stop / restart system in which fuel injection to the engine is stopped when a predetermined engine automatic stop condition is satisfied, the engine is automatically stopped, and then the engine is restarted when the engine restart condition is satisfied.
- the present invention relates to an engine starter and an engine start method.
- an engine automatic stop / restart system that automatically stops the engine when a predetermined condition is satisfied has been developed for the purpose of improving the fuel consumption of an automobile and reducing the environmental load.
- the conventional engine automatic stop / restart system since it takes time until the engine rotation is completely stopped by the frictional force, the conventional engine automatic stop / restart system has a problem that the engine cannot be restarted during this period.
- Patent Document 1 discloses that the starter is driven before the engine is stopped and fuel injection to the engine is restarted at the same time. However, the timing for restarting the starter and fuel injection is not shown.
- Patent Document 2 shows that an engine rotation descent trajectory is predicted based on an energy change, and based on the engine rotation descent trajectory, the starter pinion gear meshes with the ring gear to restart the engine. The restart timing of fuel injection is not shown.
- Patent Document 3 describes the operation of the pinion gear driving means and the starter motor when the engine restart condition is satisfied and the fuel injection to the engine is restarted and the engine cannot self-recovery only by restarting the fuel injection. Although control is shown, the restart timing of fuel injection when the starter motor is rotated after the movement of the pinion gear is started is not shown.
- Patent Documents 1 to 3 do not show the restart timing of fuel injection after the engine restart condition is satisfied and the movement of the pinion gear is started, so it takes a long time for the engine to restart combustion. At the same time, there is a problem that noise is generated due to poor meshing of the gears.
- the present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide an engine starter and an engine start method that can quickly and silently restart the engine during inertial rotation.
- An engine starter is an engine starter that stops fuel injection to an engine when an automatic engine stop condition is satisfied, automatically stops the engine, and then restarts the engine when the engine restart condition is satisfied.
- a ring gear connected to the crankshaft of the engine, a starter motor that rotates by energization, a pinion gear that transmits rotation of the starter motor to the ring gear, and a pinion that meshes by moving the pinion gear in the ring gear direction by energization
- a gear moving unit, and a fuel injection control unit that restarts fuel injection so that combustion occurs in a predetermined compression cylinder after the engine restart condition is satisfied and after the pinion gear moving unit starts moving the pinion gear. It is a thing.
- the engine starting method includes a ring gear coupled to an engine crankshaft, a starter motor that rotates when energized, a pinion gear that transmits rotation of the starter motor to the ring gear, and a pinion gear that is energized.
- a pinion gear moving section that moves in the ring gear direction and meshes, and stops the fuel injection to the engine when the engine automatic stop condition is satisfied and automatically stops the engine, and then the engine is restarted when the engine restart condition is satisfied.
- An engine start method executed by an engine start device to be restarted, wherein fuel is generated so that combustion occurs in a predetermined compression cylinder after the engine restart condition is satisfied and after the movement of the pinion gear by the pinion gear moving unit is started.
- a fuel injection control step for restarting the injection.
- the fuel injection control unit (fuel injection control step) performs a predetermined operation after the engine restart condition is satisfied and after the pinion gear moving unit starts moving the pinion gear. Fuel injection is restarted so that combustion occurs in the compression cylinder. Therefore, it is possible to obtain an engine starter and an engine start method that can shorten the time until the engine restarts combustion, and can quickly and silently restart the engine during inertial rotation.
- FIG. 1 It is a block block diagram which shows schematic structure of the engine starting apparatus which concerns on Embodiment 1 of this invention. It is a partially broken front view of the starter of the engine starter according to Embodiment 1 of the present invention. It is a flowchart which shows a series of processes in the engine starting apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows a series of processes when the engine restart conditions are satisfied in the engine starter according to Embodiment 1 of the present invention. 6 is a timing chart showing an operation when fuel injection is resumed in a state where the engine rotation speed is higher than the starter-driven post-combustion rotation speed in the engine starter according to Embodiment 1 of the present invention.
- (A), (b) is explanatory drawing which shows the fuel-injection control in the engine starting apparatus which concerns on Embodiment 1 of this invention compared with a prior art. It is a timing chart which shows operation
- FIG. 1 is a block configuration diagram showing a schematic configuration of an engine starting device according to Embodiment 1 of the present invention.
- FIG. 2 is a partially cutaway front view of the starter of the engine starting device according to Embodiment 1 of the present invention.
- the engine starter 10 includes a ring gear 11, a crank angle sensor 12, a controller 13, a starter 14, an injector 15, and an ignition coil 16.
- the starter 14 includes a solenoid 141, a plunger 142, a lever 143, a pinion gear 144, a starter motor 145, and a one-way clutch 146.
- the ring gear 11 is connected to an engine crankshaft (not shown) and meshes with the pinion gear 144 to transmit driving force to the engine.
- the crank angle sensor 12 detects the crank angle of the engine for determining the fuel injection timing and the ignition timing, and outputs a signal corresponding to the detected value to the controller 13.
- the controller 13 is constituted by, for example, an engine ECU (not shown) or the like. Based on a signal from the crank angle sensor 12, the controller 13 energizes the solenoid 141 of the starter 14, fuel injection to each cylinder by the injector 15, and ignition. Ignition by energizing the coil 16 is controlled.
- the plunger 142 When the solenoid 141 is energized, the plunger 142 is attracted and the pinion gear 144 is moved via the lever 143, whereby the pinion gear 144 is engaged with the ring gear 11. Further, the contact is closed by the movement of the plunger 142, the starter motor 145 is energized, the pinion gear 144 is rotated, and the driving force is transmitted to the engine while the ring gear 11 is engaged with the pinion gear 144.
- the one-way clutch 146 is connected to the output shaft of the starter motor 145, and rotates idly when torque is input from the ring gear 11.
- the controller 13 calculates a crank angle based on a signal from the crank angle sensor 12 and the like, and performs fuel injection by the injector 15 according to the crank angle. Further, the controller 13 charges the ignition coil 16 in accordance with the calculated crank angle, generates a spark with an ignition plug (not shown), and ignites the fuel.
- the controller 13 calculates the engine speed NE based on the cycle of the crankshaft rotation pulse output from the crank angle sensor 12. Instead of calculating the engine speed NE by the controller 13, a pulse generator or the like capable of detecting a pulse based on the teeth of the rotary encoder and the ring gear 11 is provided, and FV (frequency-voltage) conversion of signals from these is provided.
- the engine speed NE may be calculated.
- the rotation speed of the starter motor 145 may be reduced by the gear ratio between the pinion gear 144 and the ring gear 11 or a planetary gear (not shown). And In the first embodiment, the rotational speed is indicated, but the control by the peripheral speed may be performed using the gear radius.
- an engine automatic stop condition for example, a vehicle speed of 15 km / h or less and a driver is stepping on a brake
- the controller 13 performs fuel injection to the engine. Stop and let the engine rotate inertially.
- FIG. 3 is a flowchart showing a series of processes in the engine starting device according to Embodiment 1 of the present invention.
- the controller 13 determines whether or not an engine automatic stop condition is satisfied (step S101).
- step S101 when it is determined in step S101 that the engine automatic stop condition is satisfied (that is, Yes), the controller 13 starts engine stop control (step S102). Specifically, the controller 13 stops fuel injection to the engine and reduces the engine speed NE by inertia rotation.
- the controller 13 determines that the engine is automatically stopped, and sets the engine automatic stop flag F1 to “1” (step S103).
- the controller 13 determines whether or not the engine is coasting (step S104).
- whether or not the engine is rotating by inertia can be determined, for example, by determining whether or not a crank angle pulse has been detected during a predetermined time (for example, 300 ms).
- step S104 if the crank angle pulse is not detected within a predetermined time and it is determined that the engine is not coasting (ie, No), the controller 13 determines that the engine is completely stopped. Then, the process of FIG. 3 is terminated and the process proceeds to the next control cycle.
- step S104 determines whether or not the engine is inertially rotating (that is, Yes).
- step S105 If it is determined in step S105 that the engine restart condition is satisfied (that is, Yes), the controller 13 performs engine restart control (step S106).
- step S105 determines whether the engine restart condition is not satisfied (that is, No) or not satisfied (that is, No). If it is determined in step S105 that the engine restart condition is not satisfied (that is, No), the controller 13 ends the process of FIG. 3 and proceeds to the next control cycle.
- step S101 determines whether or not the engine automatic stop flag F1 is “1”.
- step S107 If it is determined in step S107 that the engine automatic stop flag F1 is “1” (that is, Yes), the controller 13 determines that the engine is automatically stopped, and the process proceeds to step S106. Perform restart control (continue).
- step S107 if it is determined in step S107 that the engine automatic stop flag F1 is “0” (that is, No), the controller 13 determines that the engine is not automatically stopped and ends the process of FIG. Then, it proceeds to the next control cycle.
- FIG. 4 is a flowchart showing a series of processes related to starter control and fuel injection when the engine restart condition is satisfied in the engine start device according to Embodiment 1 of the present invention.
- the controller 13 determines whether or not the engine rotational speed NE is equal to or lower than the startable combustible rotational speed Nr1 (for example, 400 rpm) (step S201).
- “combustible after starter driving” means that the engine speed NE decreases and combustion occurs after the controller 13 has engaged the pinion gear 144 and the ring gear 11 by energizing the solenoid 141.
- FIG. 5 is a timing chart showing an operation when fuel injection is resumed in a state where the engine rotation speed is higher than the combustible rotation speed after starter driving in the engine starter according to Embodiment 1 of the present invention.
- the pinion gear 144 is repelled by the gear end surface of the ring gear 11, which may cause noise and gear wear.
- the meshing completion means that the difference between the engine rotational speed NE and the starter motor rotational speed is within a predetermined meshing range (for example, 100 rpm), and the pinion gear 144 moves deeper than the end face of the ring gear 11. In other words, the torque can be transmitted to each other.
- step S201 when it is determined in step S201 that the engine rotational speed NE is higher than the starter-driven post-combustion combustible rotational speed Nr1 (ie, No), the controller 13 ends the process of FIG. To the next control cycle.
- step S201 if it is determined in step S201 that the engine rotational speed NE is equal to or less than the combustible rotational speed Nr1 after starter driving (that is, Yes), the controller 13 resumes fuel injection (step S202).
- the controller 13 determines whether or not the engine rotational speed NE is equal to or less than the starter drive permission rotational speed Nr2 (for example, 200 rpm) (step S203).
- the starter drive permission is to start the movement of the pinion gear 144 by starting energization of the solenoid 141.
- step S203 If it is determined in step S203 that the engine rotational speed NE is greater than the starter drive permission rotational speed Nr2 (that is, No), the controller 13 ends the processing of FIG. 4 and proceeds to the next control cycle. move on.
- step S203 if it is determined in step S203 that the engine rotational speed NE is equal to or lower than the starter drive permission rotational speed Nr2 (that is, Yes), the controller 13 starts energizing the solenoid 141 (step S204).
- step S205 determines whether or not the engine restart has been completed.
- whether or not the engine restart has been completed can be determined based on, for example, whether or not the engine rotational speed NE has become equal to or higher than a predetermined rotational speed (for example, 700 rpm).
- step S205 If it is determined in step S205 that the engine restart has not been completed (ie, No), the controller 13 ends the process of FIG. 4 and proceeds to the next control cycle.
- step S205 if it is determined in step S205 that the engine restart has been completed (that is, Yes), the controller 13 stops energization of the solenoid 141 and releases the meshing between the pinion gear 144 and the ring gear 11. At the same time, energization of the starter motor 145 is stopped (step S206).
- controller 13 sets the engine automatic stop flag F1 to “0” (step S207), ends the processing of FIG. 3, and proceeds to the next control cycle.
- FIG. 6 (a) and 6 (b) are explanatory views showing fuel injection control in the engine starting device according to Embodiment 1 of the present invention in comparison with the prior art.
- FIG. 6 (a) shows the resumption of fuel injection in conjunction with the starter drive in Patent Document 1
- FIG. 6 (b) shows the resumption of fuel injection in the engine starting device according to Embodiment 1 of the present invention. Yes.
- FIG. 6 shows the case of a three-cylinder engine.
- the arrows in the figure indicate the ignition timing.
- the ignition timing is interrupted during automatic engine stop, and ignition is resumed at a predetermined timing (here, every crank angle BTDC05 deg during the compression stroke) after the engine restart condition is satisfied.
- a predetermined timing here, every crank angle BTDC05 deg during the compression stroke
- “explosion” indicates an explosion stroke
- “exhaust” indicates an exhaust stroke
- suction indicates an intake stroke
- pressure indicates a compression stroke.
- the fuel injected at timing A1 is sucked into the cylinder, ignited at timing B1, and the first explosion occurs.
- fuel is injected into the cylinders in the intake stroke and the exhaust stroke, but the fuel injected into the cylinders in the intake stroke (cylinder # 3 in FIG. 6 (a)) is compressed immediately thereafter. Therefore, there is a case where the fuel does not sufficiently enter the cylinder and does not burn in the first compression after the fuel injection (timing B2). Therefore, the first combustion occurs in the compression of the cylinder (# 2 cylinder in FIG. 6A) injected with fuel in the exhaust stroke at timing A1 (timing B1).
- the fuel injection is performed at normal sequential injection, for example, every crank angle BTDC05deg during the exhaust stroke (timing indicated by the shaded portion in FIG. 6A). The engine can be restarted.
- a predetermined plurality of cylinders for example, a cylinder in the intake stroke and a cylinder in the exhaust stroke
- fuel injection is performed (timing A2 in FIG. 6B).
- the fuel injected at timing A2 is sucked into the cylinder, ignited at timing B2, and the first explosion occurs. Further, after the fuel injection is performed at the timing A2, the engine can be restarted by shifting to the sequential injection described above.
- the restart of the fuel injection in the engine starter according to Embodiment 1 of the present invention is earlier than the restart of the engine due to the restart of the fuel injection in conjunction with the starter drive (T1 shown in FIG. 6B).
- the first explosion can be reached in the period of time), and as a result, the time required for the engine to restart is shortened.
- FIG. 7 is a timing chart showing the operation of the engine starter according to Embodiment 1 of the present invention.
- the engine automatic stop condition is satisfied while the vehicle is running, and the fuel injection is stopped. Thereafter, at the time t3 when the engine restart condition (for example, the driver removes his / her foot from the brake pedal) is established, the engine speed NE is higher than the combustible speed Nr1 after the starter is driven, so the fuel injection is not resumed. (No in step S201 in FIG. 4).
- the engine restart condition for example, the driver removes his / her foot from the brake pedal
- the fuel injection is restarted at time t4 when the engine rotational speed NE further decreases and becomes equal to or lower than the combustible rotational speed Nr1 after the starter is driven (Yes in step S201 in FIG. 4).
- the fuel injection is restarted at time t5 when the engine rotational speed NE becomes equal to or less than the starter drive permission rotational speed Nr2, energization of the solenoid 141 is started to drive the starter motor 145.
- the fuel injected at time t4 burns in the compression stroke, and an initial explosion occurs at time t6.
- the engine rotation behavior when the fuel injection is restarted in conjunction with the starter drive is indicated by a dotted line in FIG. 7, but the fuel injection is restarted not at time t4 but at time t5 or later.
- the fuel is not in time for the compression stroke at time t6, and an initial explosion occurs at time t7 at the earliest.
- the controller 13 resumes fuel injection before the start of the movement of the pinion gear 144 after the engine speed NE becomes equal to or lower than the combustible speed Nr1 after the starter is driven after the engine restart condition during inertial rotation is satisfied.
- combustion is generated in the first compression cylinder after the gear meshing.
- the engine can be restarted promptly and silently, without giving the driver a sense of incongruity, and further by shortening the energization time of the starter, thereby achieving power saving and longer component life. it can.
- engine start is performed in which fuel injection to the engine is stopped and the engine is automatically stopped when the engine automatic stop condition is satisfied, and then the engine is restarted when the engine restart condition is satisfied.
- a ring gear connected to the crankshaft of the engine, a starter motor that rotates when energized, a pinion gear that transmits rotation of the starter motor to the ring gear, and a pinion gear that moves when energized moves in the ring gear direction.
- a pinion gear moving unit that meshes with each other, and a fuel injection control unit that restarts fuel injection so that combustion occurs in a predetermined compression cylinder after the engine restart condition is established and after the pinion gear moving unit starts moving the pinion gear And.
- the predetermined compression cylinder is the first compression cylinder after completion of meshing of the pinion gear and the ring gear. Therefore, the restart of the engine can be accelerated by performing fuel injection so that combustion occurs in the first compression cylinder after the starter motor is driven.
- the fuel injection control unit resumes fuel injection after the engine restart condition is satisfied and before the pinion gear moving unit starts moving the pinion gear.
- the pinion gear moving unit starts moving the pinion gear based on at least the engine rotation speed, and then starts the starter. Therefore, the engine restart can be accelerated by performing fuel injection so that combustion occurs at the first ignition timing after the starter motor is driven.
- Embodiment 2 FIG. In the first embodiment, it has been described that the fuel injection is restarted by comparing the engine speed NE with the starter-driven combustible speed Nr1, and combustion is generated in the first compression cylinder after the gear meshing.
- the fuel injection may be restarted so that combustion occurs in the first compression cylinder that becomes equal to or higher than the combustion permission engine rotation speed (for example, 200 rpm) after the gear engagement.
- the controller 13 restarts fuel injection so that combustion occurs in the first compression cylinder in which the engine speed NE is equal to or higher than the combustion permission engine speed Nr3.
- the configuration of the engine starter according to Embodiment 2 of the present invention is the same as that of Embodiment 1 described above, and a description thereof will be omitted.
- FIG. 8 is a flowchart showing a series of processes in the engine starter according to Embodiment 2 of the present invention.
- step S304 determines whether the engine is inertially rotated (ie, Yes)
- step S308 determines whether the engine automatic stop flag F1 is “1” (that is, Yes)
- the controller 13 further performs fuel injection permission determination (step S305 or step S309).
- FIG. 9 is a flowchart showing a series of processes for determining fuel injection permission in the engine starting apparatus according to Embodiment 2 of the present invention.
- the controller 13 determines whether or not the crank angle CA at the current processing timing is an angle CA1 (for example, BTDC 90 deg) that is the intake limit (step S401).
- an angle CA1 for example, BTDC 90 deg
- step S401 If it is determined in step S401 that the crank angle CA at the current processing timing is not the angle CA1 that is the intake limit (that is, No), the controller 13 determines the crank angle CA at the current processing timing in advance. It is determined whether or not the determined combustible determination angle CA2 (for example, BTDC 30 deg) (step S402).
- the determined combustible determination angle CA2 for example, BTDC 30 deg
- the combustible determination angle CA2 is an angle retroactive from the ignition timing (BTDC05deg) in the compression cylinder by the rotation angle necessary until the engine speed NE becomes equal to or higher than the combustion permission engine speed Nr3 by the starter motor 145. is there.
- the combustion possible determination angle CA2 is BTDC 30 deg, which is 25 deg backward from BTDC05 deg. Become.
- step S402 If it is determined in step S402 that the crank angle CA at the current processing timing is the combustible determination angle CA2 (that is, Yes), the controller 13 sets the engine speed NE at the current processing timing to NECA3.
- step S403 Store the engine speed at the combustible determination angle CA2 in the current stroke, and end the fuel injection permission determination processing at the current processing timing shown in FIG.
- step S402 determines whether the crank angle CA at the current processing timing is not the combustible determination angle CA2 (that is, No).
- the controller 13 continues at the current processing timing shown in FIG. The fuel injection permission determination process is terminated.
- step S401 determines whether the crank angle CA at the current processing timing is the angle CA1 that is the intake limit (ie, Yes).
- the controller 13 stores NECA1 in NECA2 (step S401).
- step S404 the engine speed at the angle CA1 that is the intake limit in the previous stroke is stored.
- the controller 13 stores the engine rotation speed NE at the current processing timing in NECA 1 (step S405), and stores the engine rotation speed at the angle CA1 that is the intake limit in the current stroke.
- the controller 13 determines whether or not the engine rotation speed NEb at the combustion timing of the first compression cylinder after the gear meshing is equal to or higher than the combustion permission engine rotation speed Nr3, that is, whether or not fuel injection is permitted (Ste S406).
- step S406 When it is determined in step S406 that the engine speed NEb is equal to or higher than the combustion permission engine speed Nr3 (that is, Yes), the controller 13 sets the fuel injection permission flag F2 to “1” (Ste S407) and the process proceeds to Step S402.
- step S406 determines whether the engine rotation speed NEb is lower than the combustion permission engine rotation speed Nr3 (ie, No). If it is determined in step S406 that the engine rotation speed NEb is lower than the combustion permission engine rotation speed Nr3 (ie, No), the controller 13 proceeds to step S402 as it is.
- step S406 specifically, determination is performed based on the following equation (1).
- the rotational energy change ELoss1 during one stroke at the angle CA1 that is the intake limit can be expressed by the following equation (2), where J is the rotational inertia of the engine.
- the left side of equation (1) is obtained by dividing equation (4) by J and doubling it.
- the left side of the equation (1) is smaller than 0, that is, when the rotational energy at the combustible determination angle CA2 in the next stroke is smaller than 0, only the inertial rotation of the engine does not rotate to the angle, and the pinion gear 144 and the ring gear 11 means that the angle reaches the angle during rotation by the starter motor 145 after meshing with the motor 11.
- the combustion timing of the compression cylinder is reached after the engine rotation speed NE becomes equal to or higher than the combustion permission engine rotation speed Nr3. The engine can be restarted smoothly.
- FIG. 10 is a flowchart showing a series of processes relating to starter control and fuel injection when the engine restart condition is satisfied in the engine start device according to Embodiment 2 of the present invention.
- the controller 13 determines whether or not the fuel injection permission flag F2 is “1” (step S501).
- step S501 when it is determined that the fuel injection permission flag F2 is “1” (that is, Yes), the process proceeds to step S502, and fuel injection is resumed.
- the processing after step S502 is the same as step S202 to step S207 shown in FIG.
- step S501 determines that the fuel injection permission flag F2 is “0” (that is, No)
- the controller 13 determines that the engine speed NE at the current processing timing is the starter drive permission rotation speed. It is determined whether or not Nr2 or more (step S508).
- step S508 If it is determined in step S508 that the engine rotational speed NE at the current processing timing is equal to or higher than the starter drive permission rotational speed Nr2 (that is, Yes), the controller 13 resumes fuel injection (step S509). Then, the process proceeds to step S504, and energization of the solenoid 141 is started.
- step S508 if it is determined in step S508 that the engine rotational speed NE at the current processing timing is smaller than the starter drive permission rotational speed Nr2 (that is, No), the controller 13 performs the current processing shown in FIG. The engine restart control process at the process timing is terminated, and the process proceeds to the next control cycle.
- the controller 13 determines whether or not the engine rotation speed NEb at the combustion timing in the compression cylinder is equal to or higher than the combustion permission engine rotation speed Nr3 depending on whether or not the engine rotation energy at the combustible determination angle CA2 is smaller than 0. Determine whether. Further, based on this determination, the controller 13 resumes fuel injection before the movement of the pinion gear 144, and causes combustion in the first compression cylinder that is equal to or higher than the combustion permission engine rotational speed Nr3.
- the engine can be restarted promptly and silently, without giving the driver a sense of incongruity, and further by shortening the energization time of the starter, thereby achieving power saving and longer component life. it can.
- engine start is performed in which fuel injection to the engine is stopped and the engine is automatically stopped when the engine automatic stop condition is satisfied, and then the engine is restarted when the engine restart condition is satisfied.
- a ring gear connected to the crankshaft of the engine, a starter motor that rotates when energized, a pinion gear that transmits rotation of the starter motor to the ring gear, and a pinion gear that moves when energized moves in the ring gear direction.
- a pinion gear moving unit that meshes with each other, and a fuel injection control unit that restarts fuel injection so that combustion occurs in a predetermined compression cylinder after the engine restart condition is established and after the pinion gear moving unit starts moving the pinion gear And.
- the engine further includes a rotation speed prediction unit that predicts an engine rotation speed in a predetermined compression cylinder, and the predetermined compression cylinder has a first compression at which the engine rotation speed predicted by the rotation speed prediction unit is equal to or higher than the predetermined rotation speed. Cylinder. Therefore, the restart of the engine can be accelerated by performing fuel injection so that combustion occurs in the first compression cylinder after the starter motor is driven.
- the rotational speed prediction unit predicts the engine rotational speed before the intake limit in each cylinder of the engine. Therefore, the restart of the engine can be accelerated by performing fuel injection so that combustion occurs at the first ignition timing after the starter motor is driven.
- Embodiment 3 FIG.
- the combustion timing is described as BTDC05 deg.
- ignition may be performed by starting voltage charging to the ignition coil 16 after top dead center (for example, ATDC05 deg).
- combustion possible determination angle CA2 can be set to an angle closer to the top dead center.
- the ignition coil and the ignition timing control unit that controls the ignition timing by the ignition coil are further provided, and the ignition timing control unit increases ignition to a predetermined compression cylinder. After dead point.
- the ignition preparation unit further includes an ignition coil and an ignition preparation unit that charges the ignition coil with a voltage, and the ignition preparation unit starts charging the ignition coil after top dead center. Therefore, the restart of the engine can be accelerated by performing fuel injection so that combustion occurs at the first ignition timing after the starter motor is driven.
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Abstract
Description
特許文献1には、エンジンの停止前にスタータを駆動し、それに併せてエンジンへの燃料噴射を再開することが示されているが、スタータ駆動および燃料噴射の再開タイミングについては示されていない。
そのため、エンジンが燃焼を再開するまでの時間を短縮し、エンジンの慣性回転中の再始動を速やか、かつ静粛に行うことができるエンジン始動装置およびエンジン始動方法を得ることができる。
図1は、この発明の実施の形態1に係るエンジン始動装置の概略構成を示すブロック構成図である。また、図2は、この発明の実施の形態1に係るエンジン始動装置のスタータの一部破断正面図である。
まず、コントローラ13は、エンジン自動停止条件が成立しているか否かを判定する(ステップS101)。
次に、コントローラ13は、エンジンが惰性回転しているか否かを判定する(ステップS104)。ここで、エンジンが惰性回転しているか否かは、例えば、クランク角のパルスが所定時間(例えば、300ms)の間に検出されたか否かで判断することができる。
図4に戻って、ステップS201において、エンジン回転速度NEがスタータ駆動後燃焼可能回転速度Nr1よりも大きい(すなわち、No)と判定された場合には、コントローラ13は、図4の処理を終了して、次の制御周期へと進む。
また、所定の圧縮気筒は、ピニオンギアとリングギアとの噛み合い完了後、最初の圧縮気筒である。
そのため、スタータモータ駆動後最初の圧縮気筒で燃焼が発生するように、燃料噴射を行うことにより、エンジンの再始動を早めることができる。
また、エンジンへの燃料噴射停止によるエンジンの慣性回転中に、エンジン再始動条件が成立した場合には、少なくともエンジン回転速度に基づいて、ピニオンギア移動部によりピニオンギアの移動を開始した後、スタータモータへの通電を開始する
そのため、スタータモータ駆動後最初の点火タイミングで燃焼が発生するように、燃料噴射を行うことにより、エンジンの再始動を早めることができる。
上記実施の形態1では、エンジン回転速度NEとスタータ駆動後燃焼可能回転速度Nr1との比較により燃料噴射を再開し、ギア噛み合い後最初の圧縮気筒で燃焼を発生させると説明した。
また、所定の圧縮気筒におけるエンジン回転速度を予測する回転速度予測部をさらに備え、所定の圧縮気筒は、回転速度予測部で予測されたエンジン回転速度が、所定の回転速度以上となる最初の圧縮気筒である。
そのため、スタータモータ駆動後最初の圧縮気筒で燃焼が発生するように、燃料噴射を行うことにより、エンジンの再始動を早めることができる。
そのため、スタータモータ駆動後最初の点火タイミングで燃焼が発生するように、燃料噴射を行うことにより、エンジンの再始動を早めることができる。
上記実施の形態2では、燃焼タイミングをBTDC05degとして説明したが、上死点後(例えば、ATDC05deg)にイグニッションコイル16への電圧チャージを開始して、点火を行うようにしてもよい。
また、イグニッションコイルと、イグニッションコイルに電圧をチャージする点火準備部と、をさらに備え、点火準備部は、イグニッションコイルへの電圧チャージを上死点後に開始する。
そのため、スタータモータ駆動後最初の点火タイミングで燃焼が発生するように、燃料噴射を行うことにより、エンジンの再始動を早めることができる。
Claims (9)
- エンジン自動停止条件の成立によりエンジンへの燃料噴射を停止して前記エンジンを自動停止させ、その後エンジン再始動条件の成立により前記エンジンを再始動させるエンジン始動装置であって、
前記エンジンのクランク軸に連結されたリングギアと、
通電により回転するスタータモータと、
前記スタータモータの回転を前記リングギアに伝達するピニオンギアと、
通電により前記ピニオンギアを前記リングギア方向に移動させて噛み合わせるピニオンギア移動部と、
前記エンジン再始動条件の成立後、かつ前記ピニオンギア移動部による前記ピニオンギアの移動開始後に、所定の圧縮気筒で燃焼が発生するように燃料噴射を再開する燃料噴射制御部と、
を備えたエンジン始動装置。 - 前記所定の圧縮気筒は、前記ピニオンギアと前記リングギアとの噛み合い完了後、最初の圧縮気筒である
請求項1に記載のエンジン始動装置。 - 前記所定の圧縮気筒におけるエンジン回転速度を予測する回転速度予測部をさらに備え、
前記所定の圧縮気筒は、前記回転速度予測部で予測されたエンジン回転速度が、所定の回転速度以上となる最初の圧縮気筒である
請求項1に記載のエンジン始動装置。 - 前記回転速度予測部は、前記エンジンの各気筒における吸気限界前に、エンジン回転速度を予測する
請求項3に記載のエンジン始動装置。 - 前記燃料噴射制御部は、前記エンジン再始動条件の成立後、かつ前記ピニオンギア移動部による前記ピニオンギアの移動開始前に、燃料噴射を再開する
請求項1から請求項4までの何れか1項に記載のエンジン始動装置。 - イグニッションコイルと、
前記イグニッションコイルによる点火タイミングを制御する点火タイミング制御部と、をさらに備え、
前記点火タイミング制御部は、前記所定の圧縮気筒への点火を上死点後とする
請求項1から請求項5までの何れか1項に記載のエンジン始動装置。 - イグニッションコイルと、
前記イグニッションコイルに電圧をチャージする点火準備部と、をさらに備え、
前記点火準備部は、前記イグニッションコイルへの電圧チャージを上死点後に開始する
請求項1から請求項6までの何れか1項に記載のエンジン始動装置。 - 前記エンジンへの燃料噴射停止によるエンジンの慣性回転中に、前記エンジン再始動条件が成立した場合には、少なくともエンジン回転速度に基づいて、前記ピニオンギア移動部により前記ピニオンギアの移動を開始した後、前記スタータモータへの通電を開始する
請求項1から請求項7までの何れか1項に記載のエンジン始動装置。 - エンジンのクランク軸に連結されたリングギアと、通電により回転するスタータモータと、前記スタータモータの回転を前記リングギアに伝達するピニオンギアと、通電により前記ピニオンギアを前記リングギア方向に移動させて噛み合わせるピニオンギア移動部と、を備え、エンジン自動停止条件の成立により前記エンジンへの燃料噴射を停止して前記エンジンを自動停止させ、その後エンジン再始動条件の成立により前記エンジンを再始動させるエンジン始動装置によって実行されるエンジン始動方法であって、
前記エンジン再始動条件の成立後、かつ前記ピニオンギア移動部による前記ピニオンギアの移動開始後に、所定の圧縮気筒で燃焼が発生するように燃料噴射を再開する燃料噴射制御ステップ、
を備えたエンジン始動方法。
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CN201380031149.XA CN104350260B (zh) | 2012-06-14 | 2013-03-19 | 发动机启动装置和发动机启动方法 |
US14/396,819 US9631596B2 (en) | 2012-06-14 | 2013-03-19 | Engine starting device and engine starting method |
DE112013003078.0T DE112013003078B4 (de) | 2012-06-14 | 2013-03-19 | Motorstartvorrichtung und Motorstartverfahren |
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CN104350260A (zh) | 2015-02-11 |
DE112013003078T5 (de) | 2015-04-02 |
JPWO2013187101A1 (ja) | 2016-02-04 |
DE112013003078B4 (de) | 2019-06-13 |
US20150096535A1 (en) | 2015-04-09 |
US9631596B2 (en) | 2017-04-25 |
CN104350260B (zh) | 2017-05-17 |
JP5901763B2 (ja) | 2016-04-13 |
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