WO2018216054A1 - 車両の自動駐車制御方法及び自動駐車制御装置 - Google Patents
車両の自動駐車制御方法及び自動駐車制御装置 Download PDFInfo
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- WO2018216054A1 WO2018216054A1 PCT/JP2017/018972 JP2017018972W WO2018216054A1 WO 2018216054 A1 WO2018216054 A1 WO 2018216054A1 JP 2017018972 W JP2017018972 W JP 2017018972W WO 2018216054 A1 WO2018216054 A1 WO 2018216054A1
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- Prior art keywords
- automatic parking
- parking control
- park
- control
- failure
- Prior art date
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Classifications
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Definitions
- This disclosure relates to an automatic parking control method and an automatic parking control device for a vehicle that automatically parks when automatic parking is completed at a target stop position.
- the above prior art documents disclose a technique for turning off the vehicle power so that the electrical components cannot be used when the driver gets off after completion of automatic parking, and making the electrical components usable when the driver does not get off. Yes.
- the prior art document does not disclose fail-safe control when a system abnormality occurs in the park lock system used in automatic parking control, and there is room for study.
- the present disclosure has been made by paying attention to the above-described problem. If it is determined that a system abnormality has occurred before the start of the automatic parking control, the automatic parking control is prevented from being interrupted without being completed due to the abnormality. For the purpose.
- the present disclosure includes a park-by-wire system that automatically parks when automatic parking is completed at a target stop position by automatic parking control.
- this vehicle automatic parking control method it is determined that a system abnormality occurs in which the park-by-wire system does not operate normally during automatic parking control. If it is determined that the system abnormality occurs before the automatic parking control is started, the start of the automatic parking control is not permitted.
- FIG. 1 is an overall system diagram showing an FF hybrid vehicle (an example of a vehicle) to which an automatic parking control method and an automatic parking control device of Example 1 are applied. It is a parking control system block diagram which shows a parking control system provided with the park-by-wire system which performs park lock automatically when automatic parking is completed in automatic parking control.
- 6 is a flowchart of a subroutine showing a flow of a failure diagnosis process of the park-by-wire system executed by the PBW controller of the first embodiment. It is a flowchart by the main routine which shows the flow of the automatic parking control process by the interruption fail safe control performed in the automatic parking control part of Example 1.
- Example 1 shown in the drawings.
- the automatic parking control method and the automatic parking control device according to the first embodiment are applied to an FF hybrid vehicle (an example of a vehicle) including an automatic parking control unit as one of driving support controls.
- an FF hybrid vehicle an example of a vehicle
- the configuration of the first embodiment will be described by being divided into “entire system configuration”, “park-by-wire system configuration”, “park-by-wire system failure diagnosis processing configuration”, and “automatic parking control processing configuration including fail-safe control”. .
- FIG. 1 shows an overall system of an FF hybrid vehicle to which an automatic parking control method and an automatic parking control device of Example 1 are applied.
- the overall system configuration of the FF hybrid vehicle will be described below with reference to FIG.
- the drive system of the FF hybrid vehicle includes an engine 1 (Eng), a first clutch 2 (CL1), a motor / generator 3 (MG), a second clutch 4 (CL2), and a speed change.
- a machine input shaft 5 and a belt type continuously variable transmission 6 (abbreviated as “CVT”) are provided.
- the transmission output shaft 7 of the belt type continuously variable transmission 6 is drivingly connected to the left and right front wheels 11R and 11L via a final reduction gear train 8, a front differential gear 9, and left and right front wheel drive shafts 10R and 10L.
- the first clutch 2 is a normally open dry multi-plate friction clutch that is hydraulically operated and interposed between the engine 1 and the motor / generator 3, and complete engagement / slip engagement / release is controlled by the first clutch hydraulic pressure.
- the motor / generator 3 is a three-phase AC permanent magnet synchronous motor connected to the engine 1 via the first clutch 2.
- the motor / generator 3 uses a high-power battery 12 as a power source, and an inverter 13 that converts direct current to three-phase alternating current during power running and converts three-phase alternating current to direct current during regeneration is connected to the stator coil via an AC harness 14. Connected.
- the second clutch 4 is a wet-type multi-plate friction clutch by hydraulic operation that is interposed between the motor / generator 3 and the left and right front wheels 11R and 11L as drive wheels, and is completely engaged / slip by the second clutch hydraulic pressure. The fastening / release is controlled.
- the second clutch 4 of the first embodiment uses a forward clutch and a reverse brake provided in a forward / reverse switching mechanism of the belt type continuously variable transmission 6 using a planetary gear. That is, during forward travel, the forward clutch is the second clutch 4 (CL2), and during reverse travel, the reverse brake is the second clutch 4 (CL2).
- the belt type continuously variable transmission 6 includes a primary pulley 61, a secondary pulley 62, and a belt 63 wound around the pulleys 61 and 62. And it is a transmission which obtains a stepless gear ratio by changing the belt winding diameter by the transmission hydraulic pressure to the belt primary oil chamber and the secondary oil chamber by the transmission hydraulic pressure.
- the first clutch 2, the motor / generator 3 and the second clutch 4 constitute a one-motor / two-clutch drive system, and there are “EV mode” and “HEV mode” as main drive modes by this drive system.
- the “EV mode” is an electric vehicle mode in which the first clutch 2 is disengaged and the second clutch 4 is engaged and only the motor / generator 3 is used as a drive source. Driving in the “EV mode” is referred to as “EV driving”. .
- the “HEV mode” is a hybrid vehicle mode in which both clutches 2 and 4 are engaged and the engine 1 and the motor / generator 3 are used as driving sources, and traveling in the “HEV mode” is referred to as “HEV traveling”.
- the hydraulic brake system 20 includes a brake pedal 21, a negative pressure booster 22, a master cylinder 23, a brake hydraulic pressure actuator 24, and a wheel cylinder 25.
- the brake hydraulic pressure actuator 24 includes an electric oil pump and a pressure reducing solenoid valve and a pressure increasing solenoid valve provided on each of the four wheels.
- the wheel cylinder 25 is provided at each tire position of the left and right front wheels 11L and 11R and the left and right rear wheels (not shown).
- the hydraulic brake system 20 regenerates so that the portion obtained by subtracting the coast regeneration and the brake cooperative regeneration from the driver target deceleration driving force based on the pedal operation amount is shared by the hydraulic braking force (mechanical brake).
- Brake coordinated control for minute / hydraulic pressure In addition to this, it carries various functions such as an ABS function, a TCS function, a VDC function, an automatic brake function, a cruise control brake function, and a brake function in automatic parking control that require brake fluid pressure control.
- the control system of the FF hybrid vehicle includes a hybrid control module 31 (HCM) and a driving support control unit 32 (ADAS) as shown in FIG.
- HCM hybrid control module
- ADAS driving support control unit
- a PBW controller 33 a transmission controller 34, a clutch controller 35, an engine controller 36, a motor controller 37, a steering controller 38, and a brake controller 39 are provided.
- CAN communication line 40 CAN is an abbreviation for “Controller-Area-Network”
- Hybrid control module 31 (HCM: Abbreviation of “Hybrid Control Module”) is an integrated control device that has the function of appropriately managing the energy consumption of the entire vehicle.
- the hybrid control module 31 inputs information from a regeneration mode selection switch 41, an accelerator opening sensor 42, a vehicle speed sensor 43, and the like. Based on the input information, various controls such as mode transition control between “EV mode” and “HEV mode”, regenerative mode selection control, and the like are performed.
- the driving support control unit 32 (ADAS: “Advanced Driver Assistance System”) is a control device that supports the driving operation by the driver.
- the driving support control unit 32 inputs information from an in-vehicle camera 44, an in-vehicle radar 45, a cruise travel selection switch 46, an automatic brake selection switch 47, a manned automatic parking mode selection switch 48, an unmanned automatic parking mode selection switch 49, and the like. To do.
- the in-vehicle camera 44 and the in-vehicle radar 45 are recognition sensors for recognizing the surrounding environment of the own vehicle such as a preceding vehicle, a subsequent vehicle, and an obstacle on the road.
- the automatic brake selection switch 47, the cruise travel selection switch 46, and the manned automatic parking mode selection switch 48 are switches that are provided in the passenger compartment and are operated by a driver who is in the vehicle.
- the unmanned automatic parking mode selection switch 49 is a switch that is provided in the wireless portable terminal and is operated by a driver who gets off the vehicle and leaves.
- the driving support control unit 32 includes a cruise control unit 32a, an emergency brake control unit 32b, and an automatic parking control unit 32c as controllers that perform the driving support control function.
- the cruise control unit 32a When the cruise control selection switch 46 is turned ON during traveling, the cruise control unit 32a maintains the set vehicle speed when the switch is ON when there is no preceding vehicle, and decelerates or accelerates while maintaining an appropriate inter-vehicle distance when there is a preceding vehicle.
- the preceding vehicle follow-up control is performed to follow the preceding vehicle.
- the emergency brake control unit 32b detects the vehicle ahead or a pedestrian when the automatic brake selection switch 47 is turned on, and controls emergency brake by alarm or automatic brake (slow brake, emergency brake) when there is a possibility of collision. I do.
- the automatic parking control unit 32c automatically travels along the target garage entry route from the current position to the target stop position, and automatically completes when automatic parking is completed at the target stop position.
- Car parking control that performs park lock when the unmanned automatic parking mode selection switch 49 is turned on at the entrance of the parking lot, etc., the unmanned travel is performed from the current position to the target stop position along the target garage route, and automatic parking is completed at the target stop position. Then, the car storage control that automatically performs parking lock is performed.
- the unmanned automatic parking mode selection switch 49 When the unmanned automatic parking mode selection switch 49 is turned on, the parked vehicle is automatically called up to the target stop position along the target garage exit route by automatic unmanned driving and automatically parked when the automatic parking is completed at the target stop position. Car storage control is performed.
- the automatic parking control part 32c is taking in the failure diagnosis result of the park-by-wire system A from the PBW controller 33 as fail-safe control information in automatic parking control.
- the PBW controller 33 inputs a parking lock command and a parking lock release command from the automatic parking control unit 32c or the transmission controller 34.
- the controller calculates a parking lock execution command and a parking lock release execution command for the park actuator 71 (see FIG. 2) of the park-by-wire system A.
- the PBW controller 33 has a function of diagnosing a failure of the park-by-wire system A.
- the transmission controller 34 inputs information from the inhibitor switch 50, the transmission input rotational speed sensor 51, the transmission output rotational speed sensor 52, and the like, and performs transmission hydraulic pressure control of the belt type continuously variable transmission 6 and the like.
- the transmission controller 34 outputs a park lock command to the PBW controller 33 when a P range position signal is input from the inhibitor switch 50 that detects the selected range position.
- a parking lock release command is output to the PBW controller 33.
- the clutch controller 35 inputs information from the hybrid control module 31, the second clutch input rotational speed sensor 53, the second clutch output rotational speed sensor 54, etc., and receives the first clutch 2 (CL1) and the second clutch 4 (CL2). ) Tightening hydraulic control.
- the engine controller 36 inputs information from the hybrid control module 31, the engine speed sensor 55, etc., and performs fuel injection control, ignition control, fuel cut control, and the like of the engine 1.
- the motor controller 37 performs power running control, regeneration control, and the like of the motor generator 3 by the inverter 26 based on a command from the hybrid control module 31.
- the steering controller 38 calculates an actuator operation command based on the required steering angle from the automatic parking control unit 32c when the automatic parking control unit 32c selects the car storage control or the car storage control. Then, an actuator operation command is output from the steering controller 38 to the steering actuator 56 to automatically control the steering angle of the steered wheels.
- the brake controller 39 outputs a control command for obtaining the required brake hydraulic pressure to the brake hydraulic pressure actuator 24 based on the required brake hydraulic pressure from the hybrid control module 31 and the driving support control unit 32.
- FIG. 2 shows a parking control system including a park-by-wire system A that automatically parks when automatic parking is completed in automatic parking control.
- the configuration of the parking control system will be described with reference to FIG.
- the parking control system includes an automatic parking control unit 32c, a manned automatic parking mode selection switch 48, an unmanned automatic parking mode selection switch 49, a select lever 70, an inhibitor switch 50, and a transmission controller. 34 and a park-by-wire system A.
- the park-by-wire system A includes a PBW controller 33, a park actuator 71, and a park lock mechanism B. That is, the park-by-wire system A is a system in which the park lock mechanism B is operated by the park actuator 71 without the select lever 70 and the park lock mechanism B being mechanically coupled.
- the automatic parking control unit 32c inputs a failure diagnosis result from the PBW controller 33. Then, during automatic parking control with the manned automatic parking mode selection switch 48 or the unattended automatic parking mode selection switch 49 turned ON, a parking lock release command is output to the PBW controller 33 until the automatic parking at the target stop position is completed. To do. When the automatic parking is completed at the target stop position, a parking lock command is output to the PBW controller 33.
- the transmission controller 34 outputs a parking lock release command to the PBW controller 33 while selecting a range position other than the P range position with respect to the select lever 70 when the automatic parking control is OFF.
- a park lock command is output to the PBW controller 33.
- the PBW controller 33 When the parking lock command is input from the automatic parking control unit 32 c or the transmission controller 34, the PBW controller 33 outputs a parking lock execution command to the park actuator 71.
- a parking lock release command is input from the automatic parking control unit 32 c or the transmission controller 34, a parking lock release execution command is output to the park actuator 71.
- the PBW controller 33 monitors the motor operating environment and the motor operating state of the electric motor of the park actuator 71, and performs a fault diagnosis for determining whether or not the park-by-wire system has a fault that makes park lock impossible.
- the park actuator 71 is an actuator by an electric motor that is rotationally driven in one direction by a parking lock execution command from the PBW controller 33 and is rotated in the reverse direction by a parking lock release execution command from the PBW controller 33.
- the park lock mechanism B includes a motor shaft 72 of the park actuator 71, a detent plate 73, a parking rod 74, a wedge 75, a support member 76, a parking pole 77, and a parking gear 78.
- the parking rod 74 is a rod member having one end 74 a connected to a detent plate 73 fixed to the motor shaft 72 and the other end 74 b extending toward the parking pole 77.
- One end 74a of the parking rod 74 is rotatably inserted into a hole formed in the detent plate 73, and the other end 74b is a large-diameter end so as to exhibit a stopper function that restricts the movement of the wedge 75. Yes.
- the wedge 75 is a waiting function member that is movably attached to the inner position of the other end 74b of the parking rod 74.
- a through hole is formed in the wedge 75 at the center axis position, and the wedge 75 can be moved by being inserted through the parking rod 74. Further, the wedge 75 is given a biasing force in a direction in which the wedge 75 comes into contact with the other end 74 b of the parking rod 74 by the coil spring 80.
- the parking pole 77 and the parking gear 78 are kept fitted by supporting the other end 77 b of the parking pole 77 against the wedge 75.
- the support member 76 is fixed at a position where the wedge 75 is disposed, and guides and supports the opposite surface of the wedge 75 to the surface that the other end 77b of the parking pole 77 contacts so as to be linearly movable.
- the support member 76 is fixed to the case member with bolts 81.
- the parking pole 77 is provided to be swingable with respect to the case member via a pole pin 82.
- One end of the parking pole 77 has a fitting claw 77 a that fits into the tooth recess 78 a of the parking gear 78.
- the other end 77 b of the parking pole 77 has an arcuate surface shape so as to come into contact with the wedge 75.
- a spring 84 on which a biasing force acts in the direction of increasing the contact force between the other end 77b of the parking pole 77 and the wedge 75.
- a stopper pin 85 that restricts the maximum displacement angle when the parking pole 77 is disengaged from the parking gear 78 is fixed to the case member at the outer peripheral position of one end of the parking pole 77.
- the parking gear 78 is provided on the gear shaft of the transmission output shaft 7 or the final reduction gear train 8, for example.
- Park lock mechanism B operates as follows. When the park actuator 71 is driven to rotate in one direction by the parking lock execution command from the PBW controller 33, the parking rod 74 moves to the right in FIG. Is done. When the park actuator 71 is driven to rotate in the reverse direction by the parking lock release execution command from the PBW controller 33, the parking rod 74 moves to the left in FIG. Is done.
- FIG. 3 is a flowchart of a subroutine showing a flow of the failure diagnosis process of the park-by-wire system A executed by the PBW controller 22 of the first embodiment.
- FIG. 3 shows the failure diagnosis processing configuration of the park-by-wire system A. Note that the flowchart of FIG. 3 is always executed from ignition on to off.
- the motor voltage determination threshold / motor current determination threshold for a temporary failure may be given as a fixed value, or given as a variable value according to the load resistance applied to the park actuator 71 due to road surface gradient or the like. May be.
- step S2 following the park-by-wire system failure diagnosis in step S1, it is determined whether or not the failure of the park-by-wire system A is confirmed. If YES (failure is confirmed), the process proceeds to step S9. If NO (failure is not confirmed), the process proceeds to step S3.
- it is a mechanical abnormality, a disconnection failure of the park actuator 71, a short-circuit failure, or the like, and is an abnormal failure that cannot be resolved with the passage of time, the operation proceeds to step S9 as failure confirmation, and otherwise proceeds to step S3.
- step S3 following the determination that the failure has not been confirmed in step S2, a temporary failure state before the failure of the park-by-wire system A is determined is determined, and the process proceeds to step S4.
- the temporary failure state before the failure is determined is a failure that is resolved by the elapsed time among failures in which the park-by-wire system A becomes unable to park.
- step S4 following the provisional failure state determination before the park-by-wire system failure is confirmed in step S3, it is determined whether or not it is a provisional failure state before the failure is confirmed. If YES (provisional failure state), the process proceeds to step S5. If NO (normal state), the process proceeds to step S6.
- step S5 following the determination in step S4 that there is a temporary failure state, the temporary failure count value is counted up, and the process proceeds to step S7.
- step S6 following the determination of the normal state in step S4, the temporary failure count value is held, and the process proceeds to step S7.
- step S7 following the count-up of the temporary failure count value in step S5 or the holding of the temporary failure count value in step S6, it is determined whether or not the temporary failure count value has increased to the failure determination threshold value. If YES (provisional failure count value ⁇ failure determination threshold value), the process proceeds to step S10. If NO (temporary failure count value ⁇ failure determination threshold value), the process proceeds to step S8.
- step S12 following the determination that the normal state is restored in step S11, the normal state return count value is counted up, and the process proceeds to step S13.
- step S13 following the count-up of the normal state return count value in step S12, it is determined whether or not the normal state return count value has increased to the normal return determination threshold value. If YES (normal state return count value ⁇ normal return determination threshold value), the process proceeds to step S14. If NO (normal state return count value ⁇ normal return determination threshold value), the process proceeds to step S15.
- bTMPFAIL the temporary failure determination flag
- step S15 bFAIL is set to 1 in step S9, or it is determined that there is a temporary failure state in step S11, or it is determined that normal state return count value ⁇ normal return determination threshold value in step S13.
- FIG. 4 shows a flow of automatic parking control processing by interrupt fail-safe control executed by the automatic parking control unit 32c of the first embodiment.
- FIG. 4 shows a flow of automatic parking control processing by interrupt fail-safe control executed by the automatic parking control unit 32c of the first embodiment.
- start condition start selection of automatic parking mode
- the start of the manned automatic parking mode means that the driver enters the car storage control or the car storage control by operating the manned automatic parking mode selection switch 48.
- the start of the unmanned automatic parking mode means that the driver starts getting off the car storage control or the car storage control by operating the unmanned automatic parking mode selection switch 49.
- step S22 following the determination that the automatic parking mode start selection has been made in step S21, the parking area is determined and determined, and the process proceeds to step S23.
- the parking area discrimination determination means determining the parking area where the vehicle is scheduled to park, and in the case of car storage control, the vehicle is issued from the parking position. It means to decide the area to stop temporarily.
- step S23 following the determination of the parking area in step S22, an automatic parking start operation is awaited. If there is a start operation, the process proceeds to step S24.
- “with automatic parking start operation” means that conditions for starting manned / unmanned travel toward the parking area are in place.
- step S24 following the determination that there is an automatic parking start operation in step S23, it is determined whether to start or cancel automatic parking.
- the process proceeds to step S25, and when canceling automatic parking, the process proceeds to the end.
- step S25 following the determination that the automatic parking is started in step S24, or the determination that the vehicle is not parked in the parking area in step S26, parking travel is started, and the process proceeds to step S26.
- step S26 following the start of parking travel in step S25, it is determined whether or not the vehicle is parked in the parking area. If YES (stopped in the parking area), the process proceeds to step S27. If NO (stopped in the parking area), the process returns to step S25.
- step S27 following the determination that the vehicle is parked in the parking area in step S26, a park lock command is output to the PBW controller 33, and the process proceeds to the end.
- step S31 the period from before the start selection determination of the manned / unmanned automatic parking mode in step S21 until the park lock command is output in step S27 is set as an interrupt process permission area, and the interrupt is started. Proceed to step S32.
- step S32 following the start of interruption in step S31, it is determined whether or not the vehicle has a vehicle speed. If YES (with vehicle speed), the process proceeds to step S33, and if NO (without vehicle speed), the process proceeds to step S34.
- step S33 following the determination that the vehicle speed is present in step S32, stop processing for operating the hydraulic brake is performed, and the process proceeds to step S34.
- step S33 following the determination that there is no vehicle speed in step S32 or the stopping process in step S33, the host vehicle is kept in a stopped state, and the process proceeds to step S35.
- the failure confirmation flag bFAIL or the temporary failure determination flag bTMPFAIL is set to 1 if the own vehicle is in a stopped state at the time of interruption, it is held as it is, and if the own vehicle is in a running state, the vehicle is stopped by automatic braking. Is done.
- step S1 When the park-by-wire system A is in a normal state, the flow of step S1, step S2, step S3, step S4, step S6, step S7, and step S8 is repeated in the flowchart of FIG. Therefore, the failure confirmation flag bFAIL and the temporary failure determination flag bTMPFAIL remain set to 0.
- step S1 When it is diagnosed that the park actuator 71 is an abnormality (failure determination) that cannot be resolved over time due to a mechanical abnormality, disconnection failure, short-circuit failure, or the like, in the flowchart of FIG. 3, step S1, step S2, step S9, step Proceed to S15.
- step S1 step S2, step S3, step S4, step S5, and so on.
- step S7 step S8 is repeated. That is, the temporary failure determination flag bTMPFAIL remains set to 0.
- step S7 If it is determined in step S7 that the temporary failure count value ⁇ the failure determination threshold value as time elapses from the start of the temporary failure diagnosis, the process proceeds from step S7 to step S10.
- the normal state return count value ⁇ the normal return determination threshold value is determined as from step S10 to step 11 ⁇ step S12 ⁇ step S13 ⁇ step. Proceed to S15. Therefore, a fail safe measure is taken by interruption to the main routine shown in FIG.
- step S21 the parking area is determined and determined, and in the next step S23, an automatic parking start operation is awaited.
- step S24 When conditions for starting manned / unmanned travel toward the parking area are set and automatic parking control is started, the process proceeds from step S23 to step S24 ⁇ step S25 ⁇ step S26.
- step S25 parking travel is started, and in step S26, it is determined whether or not the vehicle is parked in the parking area.
- step S25 While the vehicle is not parked in the parking area, the flow from step S25 to step S26 is repeated, and when it is determined that the vehicle is parked in the parking area, the flow proceeds to step S27.
- step S27 a park lock command is output to the PBW controller 33.
- the parking lock command is output from the automatic parking control unit 32c to the PBW controller 33.
- a parking lock execution command based on the parking lock command is output to the park actuator 71, so that the parking pole 77 is fitted to the parking gear 78 and the parking lock state is set.
- the driver When performing control to stop at the target stop position by automatic parking control, the driver recognizes that the parking lock is automatically applied when the automatic parking is completed. As described above, the most important point is that the driver recognizes that the parking lock is automatically applied based on the preconception of the driver. For this driver recognition, when the automatic parking lock function is abnormal, or when the automatic parking is completed due to a malfunction, the parking lock is not applied even though it is not automatically parked. The driver does not notice. Therefore, when the driver suddenly touches the accelerator pedal or when the driver gets off in the inclined parking area, the vehicle may start to move.
- the problem when the automatic parking control is canceled during the automatic parking control is solved while the park lock is impossible.
- the target parking / stop area may be inclined.
- the vehicle will start to move along the slope when the driver gets off or the driver is not on board.
- fail safe control is made a post-measure after detecting the failure that park lock is impossible after reaching the target stop position, until the post-action is executed after reaching the target stop position, It will allow the vehicle to start moving.
- fail-safe control that does not permit the start of automatic parking control is performed based on the system abnormality occurrence determination. Therefore, if it is determined that the system abnormality has occurred before the start of the automatic parking control, the automatic parking control is prevented from being interrupted without being completed due to the abnormality.
- Example 1 when the system abnormality is a temporary failure that is resolved with the passage of time, the start of automatic parking control is permitted after the temporary failure is resolved.
- the temporary failure that is resolved with the passage of time is separated from the failure determination that is not resolved with the passage of time.
- the system abnormality is a failure in which the park-by-wire system A cannot park. If it is determined that a failure that makes park lock impossible before starting automatic parking control, the start of automatic parking control is prohibited.
- the automatic parking control is started when the parking lock is disabled, the driver assumes that the automatic parking control is completed when the automatic parking control is completed. For this reason, if the driver unintentionally touches the accelerator pedal at the target stop position or sets the gradient road as the target stop position, the vehicle may start to move from the target stop position. On the other hand, when the occurrence of a failure that makes park lock impossible is determined, the start of automatic parking control itself is prohibited. Therefore, when a failure that makes park lock impossible occurs, the vehicle is prevented from moving from the target stop position.
- Example 1 when it is determined that a failure has occurred between the start of automatic parking control and before the completion of automatic parking, the automatic parking control is turned off after confirming the stop holding state due to the brake stop.
- the automatic parking control if the occurrence of a failure is determined during automatic parking control, if the automatic parking control is immediately turned off, the vehicle may move from the failure occurrence determination position due to inertial running. On the other hand, after confirming the stop holding state due to the brake stop, the automatic parking control is turned off. Therefore, when the occurrence of a failure is determined during automatic parking control, the automatic parking control is turned off in a safe state where the vehicle stops at the position where the failure is determined.
- the automatic parking control has a control function of performing automatic parking control by unmanned traveling and automatically performing parking lock when the automatic parking is completed at the target stop position. If the occurrence of a failure that disables parking lock is determined before the automatic parking control by unmanned traveling is started, the start of automatic parking control by unattended traveling is prohibited.
- a park-by-wire system A that automatically parks when automatic parking is completed at the target stop position by automatic parking control is provided.
- the automatic parking control method for this vehicle FF hybrid vehicle
- the system abnormality is a failure in which the park-by-wire system A becomes unable to park. If it is determined that a failure that makes park lock impossible before the automatic parking control is started, the start of the automatic parking control is prohibited (FIG. 4). For this reason, in addition to the effect of (1) or (2), it is possible to prevent the vehicle from starting from the target stop position when a failure that disables the park lock occurs.
- the automatic parking control has a control function that performs automatic parking control by unmanned traveling and automatically parks when automatic parking is completed at the target stop position. If the occurrence of a failure that disables parking lock is determined before starting automatic parking control by unmanned traveling, the start of automatic parking control by unattended traveling is prohibited (FIG. 4). For this reason, in addition to the effects (1) to (4), it is possible to prevent the vehicle from starting from the target stop position in automatic parking control by unmanned driving when a failure that makes park lock impossible occurs. .
- An automatic parking controller (automatic parking control unit 33c) that performs automatic parking control, and a park-by-wire controller (PBW) that is included in the park-by-wire system A that automatically parks when automatic parking is completed at the target stop position by automatic parking control. Controller 33).
- the park-by-wire controller (PBW controller 33) determines the occurrence of a system abnormality in which the park-by-wire system A does not operate normally during automatic parking control. Part (FIG. 3). If the automatic parking controller (automatic parking control unit 33c) determines that a system abnormality occurs before starting the automatic parking control, the fail-safe control processing unit that does not allow the automatic parking control to start (S31 in FIG. 4). To S38). For this reason, an automatic parking control device for a vehicle (FF hybrid vehicle) that avoids being interrupted because automatic parking control cannot be completed due to an abnormality when it is determined that a system abnormality has occurred before the start of automatic parking control. Can be provided.
- Example 1 the PBW controller 33 has a failure diagnosis processing unit, and the automatic parking control unit 33c has an automatic parking control processing unit including failsafe control. However, it is good also as an example which has all the automatic parking control processing parts including a failure diagnosis processing part and fail safe control in one automatic parking controller.
- Example 1 as the automatic parking control unit 33c, an example of performing automatic parking control by manned traveling and automatic parking control by unmanned traveling has been shown.
- the automatic parking control unit may perform only car storage control by manned travel, or may perform car storage control and car storage control by manned travel.
- Example 1 shows an example in which the automatic parking control method and the automatic parking control device of the present disclosure are applied to an FF hybrid vehicle including an automatic parking control unit as one of driving support controls.
- the automatic parking control method and the automatic parking control device of the present disclosure can be applied not only to the FF hybrid vehicle but also to hybrid vehicles, electric vehicles, and engine vehicles having various driving forms.
- any vehicle having a park-by-wire system that automatically parks when automatic parking is completed at the target stop position by automatic parking control can be applied.
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Abstract
Description
この車両の自動駐車制御方法において、自動駐車制御中にパークバイワイヤシステムが正常に作動しないシステム異常が発生することを判定する。
自動駐車制御を開始する前にシステム異常が発生することが判定されると、自動駐車制御の開始を許可しない。
実施例1の自動駐車制御方法及び自動駐車制御装置は、運転支援制御の一つとして自動駐車制御部を備えたFFハイブリッド車両(車両の一例)に適用したものである。以下、実施例1の構成を、「全体システム構成」、「パークバイワイヤシステム構成」、「パークバイワイヤシステムの故障診断処理構成」、「フェールセーフ制御を含む自動駐車制御処理構成」に分けて説明する。
図1は、実施例1の自動駐車制御方法及び自動駐車制御装置が適用されたFFハイブリッド車両の全体システムを示す。以下、図1に基づいてFFハイブリッド車両の全体システム構成を説明する。
液圧ブレーキシステム20は、ブレーキペダル21と、負圧ブースタ22と、マスタシリンダ23と、ブレーキ液圧アクチュエータ24と、ホイールシリンダ25と、を備える。そして、ブレーキ操作有りのとき、マスタシリンダ圧に基づいて4輪のホイールシリンダ圧を独立に制御する。一方、ブレーキ操作無しのとき、外部からの制御指令により作動する電動オイルポンプからのポンプ圧に基づいて4輪のホイールシリンダ圧を独立に制御する。なお、ブレーキ液圧アクチュエータ24は、電動オイルポンプと、4輪それぞれに設けられた減圧ソレノイドバルブ及び増圧ソレノイドバルブと、有して構成される。ホイールシリンダ25は、左右前輪11L,11Rと図外の左右後輪のそれぞれのタイヤ位置に設けられる。
図2は、自動駐車制御において自動駐車が完了すると自動でパークロックを行うパークバイワイヤシステムAを備えるパーキング制御系を示す。以下、図2に基づいてパーキング制御系構成を説明する。
図3は、実施例1のPBWコントローラ22にて実行されるパークバイワイヤシステムAの故障診断処理の流れを示すサブルーチンによるフローチャートである。以下、パークバイワイヤシステムAの故障診断処理構成をあらわす図3の各ステップについて説明する。なお、図3のフローチャートはイグニッションオンからオフまで常時実行される。
ここで、メカ異常やパークアクチュエータ71の断線故障やショート故障等であり、時間経過によって解消しない異常故障である場合は、故障確定としてステップS9へ進み、それ以外の場合はステップS3へ進む。
ここで、故障確定前の仮故障状態とは、パークバイワイヤシステムAがパークロック不能になる故障のうち、経過時間によって解消する故障をいう。
図4は、実施例1の自動駐車制御部32cにて実行される割り込みフェールセーフ制御による自動駐車制御処理の流れを示す。以下、割り込みフェールセーフ制御による自動駐車制御処理構成をあらわす図4の各ステップについて説明する。なお、図4のフローチャートは、開始条件(自動駐車モードの開始選択)の成立により実行される。
ここで、有人自動駐車モードの開始とは、有人自動駐車モード選択スイッチ48の操作により、ドライバーが乗車しての自動車庫入れ制御又は自動車庫出し制御を開始することをいう。無人自動駐車モードの開始とは、無人自動駐車モード選択スイッチ49の操作により、ドライバーが降車しての自動車庫入れ制御又は自動車庫出し制御を開始することをいう。
ここで、駐車エリアの判別決定とは、自動車庫入れ制御の場合は、自車が駐車を予定するパーキング領域を決定することをいい、自動車庫出し制御の場合は、自車が駐車位置から出庫して一時停車する領域を決定することをいう。
ここで、自動駐車の開始操作有りとは、駐車エリアに向かって有人走行/無人走行を開始する条件が整っていることをいう。
実施例1の作用を、「故障診断処理作用」、「自動駐車制御処理作用」、「自動駐車制御作用」、「自動駐車制御の特徴作用」に分けて説明する。
まず、パークバイワイヤシステムAの故障診断処理作用を、図3のフローチャートに基づいて説明する。
次に、割り込みフェールセーフ制御による自動駐車制御処理作用を、図4のフローチャートに基づいて説明する。
まず、目標停車位置で自動駐車が完了すると自動でパークロックを行うパークバイワイヤシステムを備えた車両での自動駐車制御の背景技術について説明する。
即ち、パークロックされてないにもかかわらず、ドライバーがパークロック完了と思い込み、アクセルペダルに触れ、急発進してしまうような状態を発生させないようにすることができる。この車両の目標停車位置からの移動には、目標駐車/停車エリアが傾斜している場合も考えられる。つまり、パークロックされないまま傾斜勾配路の目標停車位置に停止し、ドライバー操作に委ねる状態にした場合、ドライバーが降車したり、ドライバーが乗車していなかったりすると、車両が傾斜勾配路に沿って動き出す可能性がある。
ちなみに、フェールセーフ制御を、目標停車位置に到達してからパークロックが不能である故障を検出した後の事後対策にすると、目標停車位置に到達してから事後対策が実行されるまでの間、車両の動き出しを許すことになる。
実施例1では、自動駐車制御中にパークバイワイヤシステムAが正常に作動しないシステム異常が発生することを判定する。自動駐車制御を開始する前にシステム異常が発生することが判定されると、自動駐車制御の開始を許可しない。
実施例1のFFハイブリッド車両の自動駐車制御方法及び自動駐車制御装置にあっては、下記に列挙する効果を得ることができる。
自動駐車制御を開始する前にシステム異常が発生することが判定されると、自動駐車制御の開始を許可しない(図4)。
このため、自動駐車制御の開始前にシステム異常の発生が判定されると、自動駐車制御が異常により完了できないで中断されるのを未然に回避する車両(FFハイブリッド車両)の自動駐車制御方法を提供することができる。
このため、(1)の効果に加え、システム異常が時間経過により解消する仮故障である場合、一時的に自動駐車制御を待機させても、自動駐車制御を再開することができる。
このため、(1)又は(2)の効果に加え、パークロック不能となる故障が発生したとき、目標停車位置から車両が動き出すことを未然に回避することができる。
このため、(3)の効果に加え、自動駐車制御中に故障の発生が判定されたとき、故障発生の判定位置に停車した安全な状態で自動駐車制御をオフにすることができる。
無人走行による自動駐車制御を開始する前にパークロック不能となる故障の発生が判定されると、無人走行による自動駐車制御の開始を禁止する(図4)。
このため、(1)~(4)の効果に加え、パークロック不能となる故障が発生したとき、無人走行による自動駐車制御での目標停車位置から車両が動き出すことを未然に回避することができる。
この車両(FFハイブリッド車両)の自動駐車制御装置において、パークバイワイヤコントローラ(PBWコントローラ33)は、自動駐車制御中にパークバイワイヤシステムAが正常に作動しないシステム異常が発生することを判定する故障診断処理部(図3)を有する。
自動駐車コントローラ(自動駐車制御部33c)は、自動駐車制御を開始する前にシステム異常が発生することが判定されると、自動駐車制御の開始を許可しないフェールセーフ制御処理部(図4のS31~S38)を有する。
このため、自動駐車制御の開始前にシステム異常の発生が判定されると、自動駐車制御が異常により完了できないで中断されるのを未然に回避する車両(FFハイブリッド車両)の自動駐車制御装置を提供することができる。
Claims (6)
- 自動駐車制御により目標停車位置で自動駐車が完了すると自動でパークロックを行うパークバイワイヤシステムを備える車両の自動駐車制御方法において、
前記自動駐車制御中に前記パークバイワイヤシステムが正常に作動しないシステム異常が発生することを判定し、
前記自動駐車制御を開始する前に前記システム異常が発生することが判定されると、前記自動駐車制御の開始を許可しない
ことを特徴とする車両の自動駐車制御方法。 - 請求項1に記載された車両の自動駐車制御方法において、
前記システム異常が、時間経過により解消する仮故障である場合、前記仮故障が解消した後、前記自動駐車制御の開始を許可する
ことを特徴とする車両の自動駐車制御方法。 - 請求項1又は2に記載された車両の自動駐車制御方法において、
前記システム異常は、前記パークバイワイヤシステムがパークロック不能となる故障であり、
前記自動駐車制御を開始する前に前記パークロック不能となる故障の発生が判定されると、前記自動駐車制御の開始を禁止する
ことを特徴とする車両の自動駐車制御方法。 - 請求項3に記載された車両の自動駐車制御方法において、
前記自動駐車制御の開始後から自動駐車の完了前までの間に前記故障の発生が判定されると、ブレーキ停車による停止保持状態を確認した後、前記自動駐車制御をオフにする
ことを特徴とする車両の自動駐車制御方法。 - 請求項1から4までの何れか一項に記載された車両の自動駐車制御方法において、
前記自動駐車制御は、無人走行による自動駐車制御を行い、目標停車位置で自動駐車が完了すると自動でパークロックを行う制御機能を有し、
前記無人走行による自動駐車制御を開始する前にパークロック不能となる故障の発生が判定されると、前記無人走行による自動駐車制御の開始を禁止する
ことを特徴とする車両の自動駐車制御方法。 - 自動駐車制御を行う自動駐車コントローラと、
前記自動駐車制御により目標停車位置で自動駐車が完了すると自動でパークロックを行うパークバイワイヤシステムに有するパークバイワイヤコントローラと、
を備える車両の自動駐車制御装置において、
前記パークバイワイヤコントローラは、前記自動駐車制御中に前記パークバイワイヤシステムが正常に作動しないシステム異常が発生することを判定する故障診断処理部を有し、
前記自動駐車コントローラは、前記自動駐車制御を開始する前に前記システム異常が発生することが判定されると、前記自動駐車制御の開始を許可しないフェールセーフ制御処理部を有する
ことを特徴とする車両の自動駐車制御装置。
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US20210009091A1 (en) | 2021-01-14 |
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EP3636501A4 (en) | 2020-07-08 |
US11292440B2 (en) | 2022-04-05 |
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