CN114906116A - Parking control device and parking control method - Google Patents
Parking control device and parking control method Download PDFInfo
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- CN114906116A CN114906116A CN202110806453.3A CN202110806453A CN114906116A CN 114906116 A CN114906116 A CN 114906116A CN 202110806453 A CN202110806453 A CN 202110806453A CN 114906116 A CN114906116 A CN 114906116A
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- 238000000034 method Methods 0.000 title description 17
- 238000012545 processing Methods 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims description 11
- 208000032953 Device battery issue Diseases 0.000 claims description 9
- 238000012790 confirmation Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 description 28
- 238000010586 diagram Methods 0.000 description 15
- 230000005540 biological transmission Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000010248 power generation Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000007858 starting material Substances 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/404—Brake-by-wire or X-by-wire failsafe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/414—Power supply failure
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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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model provides a parking controlling means, is applied to the vehicle that has electronic parking system, and electronic parking system includes by the SBW system of parking motor drive, as the power of vehicle, only has storage battery and generator, and parking controlling means and storage battery and generator are series connection respectively, and parking controlling means includes: a power failure determination unit that determines that a power failure has occurred when a first potential of a terminal of the parking motor connected to the battery detected by the battery potential sensor or a second potential of the terminal of the parking motor connected to the generator detected by the generator potential sensor becomes a low level; and an emergency danger avoiding processing unit which, when it is determined that a power failure has occurred, issues a parking range switching command to an SBW ECU of the SBW system. The electronic parking system can be stably operated only through the storage battery and the generator under the condition of not using an auxiliary power supply, so that the safety of a vehicle can be improved while the cost is reduced and the space is saved.
Description
Technical Field
The present invention relates to a parking control device and a parking control method, and more particularly to a parking control device and a parking control method when a power supply fails.
Background
With the development of automobile technology, electronic parking systems, such as an SBW (Shift By Wire) system and an EPB (Electrical Park Brake) system, are used in more and more vehicles. Unlike a conventional mechanical parking system, an electronic parking system takes power from a power source, such as a battery, to perform a parking operation of a vehicle. However, when a failure such as power failure of the battery 60 or disconnection due to poor contact of the wire harness occurs during the traveling of the vehicle, power cannot be supplied to the electronic parking system, and thus the traveling safety cannot be ensured.
As an example of solving the problem, patent document 1 discloses a vehicle control technique in which a super capacitor as an auxiliary power supply is provided as a power supply source in addition to a battery and a generator, and the auxiliary power supply is shared by the electronic parking systems, so that even when the battery and the generator are broken and the power is cut off, the auxiliary power supply can supply power to the electronic parking systems, thereby ensuring the operation of a parking actuator and the stop of the vehicle.
However, in the vehicle, the amount of electricity that can be supplied by the super capacitor as the auxiliary power supply is very limited, unstable, and continuous, and may be lower than the operating voltage of the electronic parking system, thereby affecting the parking operation of the vehicle. At the same time, the cost is increased and the control system is enlarged due to the increase of parts. Therefore, there is room for improvement from the viewpoint of stable power supply and space saving.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a parking control apparatus and a parking control method, which can stably operate an electronic parking system only by a battery and a generator without using an auxiliary power supply, and can improve the safety of a vehicle while reducing the cost and saving the space.
A first aspect of the present invention relates to a parking control apparatus 10 applied to a vehicle having an electronic parking system including an SBW system 30 driven by a parking motor 322, and having only a battery 60 and a generator 70 as a power source of the vehicle, the parking control apparatus being connected to the battery 60 and the generator 70, respectively, the parking control apparatus including: a power failure determination unit 11 configured to determine that a power failure has occurred in the power failure determination unit 11 when a first potential of a terminal of the parking motor 322 connected to the battery 60 detected by a battery potential sensor 80 or a second potential of the terminal of the parking motor 322 connected to the generator 70 detected by a generator potential sensor 90 becomes a low level; and an emergency evacuation processing unit 13 that issues a parking range switching command to the SBW ECU31 of the SBW system 30 when the power failure determination unit 11 determines that a power failure has occurred.
According to the parking control device having this configuration, when it is determined that one of the battery and the generator has failed, the parking range switching command is issued to the SBW ECU31 using electric power of the other in advance, and the shift switching mechanism 51 can be switched to the P range. Thus, the occurrence of a problem that the parking operation cannot be performed due to the absence of the power supply can be avoided, and the safety of the vehicle can be ensured.
A second aspect of the present invention relates to a parking control apparatus 10 applied to a vehicle having an electronic parking system including an EPB system 40 having only a battery 60 and a generator 70 as a power source of the vehicle, the parking control apparatus being connected to the battery 60 and the generator 70, respectively, the parking control apparatus including: a power failure determination unit 11 that determines that a power failure has occurred when a first potential of a terminal of the parking motor 322 connected to the battery 60 detected by a battery potential sensor 80 and a second potential of a terminal of the parking motor 322 connected to the generator 70 detected by a generator potential sensor 90 become low; and an emergency danger avoiding processing unit 13 that operates the EPB system 40 when the power failure determination unit 11 determines that a power failure has occurred.
According to the parking control device with the structure, under the condition that the storage battery and the generator are both powered off relative to the SBW system, the command can be automatically sent to the EPB system, and the vehicle can be fixed by the EPB system.
Drawings
Fig. 1 is a block diagram of a parking control apparatus according to an embodiment of the present invention.
Fig. 2 is a perspective view showing the structure of the shift position switching mechanism.
Fig. 3 is a diagram showing a schematic configuration of a parking system to which a parking control device according to an embodiment of the present invention is applied.
Fig. 4 is a schematic diagram showing failure mode 1.
Fig. 5 is a logic diagram showing the control of the parking control apparatus in case 3 of failure mode 1.
Fig. 6 is a schematic diagram showing failure mode 2.
Fig. 7 is a logic diagram showing the control of the parking control apparatus in the failure mode 2.
Fig. 8 is a schematic diagram showing failure mode 3.
Fig. 9 is a logic diagram showing the control of the parking control apparatus in the failure mode 3.
(description of symbols)
10 X ECU
20 parking brake switch
30 SBW system
31 SBW ECU
32 actuator
321 encoder
322 parking motor
40 EPB system
50 automatic transmission
51-gear switching mechanism
29 output shaft
33 stop plate
34 stop spring
35 to 38 recesses
41 parking gear
42 locking lever
43 parking lever
48 cones
60 storage battery
70 electric generator
80 storage battery potential sensor
90 electric generator potential sensor
100 generator speed sensor
110 electric quantity detecting part
120 power consumption detecting part
Detailed Description
In the present embodiment, a general fuel-powered vehicle will be described as an example of the vehicle. That is, an engine (not shown) is provided as a power source of the vehicle. As a power source of the vehicle, there are a battery 60 and a generator 70.
The battery 60 is a chargeable and dischargeable secondary battery, specifically, a lithium ion battery. The generator 70 has a power generation function of generating power (regenerative power generation) by rotation of a crankshaft and an axle of the engine. Specifically, the generator 70 converts kinetic energy of the engine into electric energy when the engine is operated, and supplies the electric energy to various loads of the vehicle including the parking system, and charges the battery 60 when the charge capacity of the battery 60 is lower than a certain value. The battery 60 and the generator 70 are connected to the vehicle loads, respectively, to supply power to the respective vehicle loads.
First, a parking control device according to an embodiment of the present invention and a parking control system to which the parking control device according to the embodiment of the present invention is applied will be described with reference to fig. 1 and 3.
Fig. 3 is a diagram showing a schematic configuration of a parking system to which a parking control device according to an embodiment of the present invention is applied.
As shown in fig. 3, the vehicle mainly includes an XECU10 as a parking control device as a parking system, and the XECU10 is a so-called microcomputer including a CPU, a ROM, a RAM, an interface, and the like, and controls a shift-by-wire system (hereinafter referred to as an SBW system) 30, an EPB system 40, and the like of the vehicle based on detection information from various sensors, a shift range switching command from a shifter or a parking brake switch 20, and the like.
Further, the parking system further includes: a parking brake switch 20, the parking brake switch 20 outputting a parking signal to the XECU10 according to the driver's operation to cause the XECU10 to issue a parking command to the SBW system 30; an SBW system 30, which is a system for electrically controlling the shift switching mechanism 51 of the automatic transmission 50, and includes an SBW ECU31 as a shift control device, an actuator (hereinafter referred to as ACT)32, and the like; an automatic transmission 50, the automatic transmission 50 having a shift-position switching mechanism 51, the shift-position switching mechanism 51 switching the shift position of the automatic transmission 50 by an actuating force of an ACT 32.
As a power source, the parking system includes a battery 60 and a generator 70, and the battery 60 and the generator 70 are respectively supplied with power from various vehicle loads including the XECU 10.
As described above, the SBW system 30 includes the SBW ECU31 and the ACT 32. The ACT32 includes an encoder 321, a parking motor 322, and the like. The encoder 321 is configured by, for example, a magnetic rotary encoder, and is configured to output a pulse signal for each predetermined angle in synchronization with rotation of a rotor of the parking motor 322. The SBW ECU31 rotationally drives the parking motor 322 by switching the energization phase of the parking motor 322 in accordance with a pulse signal output from the encoder 321. The XECU10 can also confirm which of the P range, R range, N range, and D range the current shift range is in, by a pulse signal from the encoder 321.
The shift position switching mechanism 51 is a mechanism that switches the shift position of the automatic transmission 50 of the vehicle. In the present embodiment, a four-position shift switching mechanism that switches between a P range (parking range), an R range (reverse range), an N range (neutral range), and a D range (drive range) is exemplified.
As shown in fig. 2, the shift position switching mechanism 51 includes a detent plate 33 that rotates integrally with the output shaft 29 of the parking motor 322, and detent springs 34 for holding the detent plate 33 in the respective shift positions P, R, N, D. The stopper spring 34 is fitted into any one of a plurality of recesses 35 to 38 formed in an outer edge of the stopper plate 33, thereby holding the rotational position of the stopper plate 33.
The shift position switching mechanism 51 includes a parking gear 41, a lock lever 42, and a parking lever 43 as a parking mechanism. The parking gear 41 rotates integrally with the output shaft of the automatic transmission 50, and when the locking lever 42 is fitted into the parking gear 41 and locked, the drive wheels of the vehicle connected to the output shaft of the automatic transmission 50 are held in a rotation-stopped state (parking state). The parking lever 43 is connected to the stopper plate 33, and a cone 48 provided at a distal end portion of the parking lever 43 abuts against the lock lever 42.
When the driver of the vehicle turns on the parking brake switch 20, the parking brake switch 20 issues a parking command to the XECU10, and upon receiving the parking command, the XECU10 issues a parking range switching command to the SBW ECU 31. The SBW ECU31 drives the parking motor 322 to switch the shift switching mechanism 51 to the parking position. At this time, the detent plate 33 that rotates integrally with the output shaft 29 of the parking motor 322 is rotated to a position corresponding to the P range that is the parking range, and the cone 48 connected to the detent plate 33 via the parking rod 43 is pushed in toward the lower side of the parking lock lever 42 to push up the parking lock lever 42, and the parking lock lever 42 is engaged with the parking gear 41 to lock the parking gear 41, thereby completing the parking operation.
As described above, the vehicle power supply includes the battery 60 and the generator 70, and the battery 60 and the generator 70 are connected in parallel to supply power to various vehicle loads including the XECU10, such as the SBW ECU31 and the parking motor 322.
During the operation of the vehicle, a power failure sometimes occurs due to vibration or power aging. With regard to the power failure mode, there are the following cases: a fault mode 1, in which a battery power failure occurs in the fault mode 1; a failure mode 2 in which the generator is powered off; and a failure mode 3, in which failure mode 3 the battery and the generator are powered off simultaneously.
In any failure mode, the parking system may not operate normally due to poor power supply, and there is a risk of safety of the vehicle. For this reason, the parking control device according to the embodiment of the present invention performs the following control for each failure mode.
The various failure modes and the control method of the parking control apparatus in each failure mode will be described with reference to fig. 4 to 9.
(failure mode 1)
Fig. 4 is a schematic diagram showing failure mode 1. The failure mode 1 includes the following four cases.
Case 1: when the vehicle is idling, the battery 60 is powered off.
In such a situation, when the vehicle is idling, the battery 60 is powered off, and the driver of the vehicle obtains information of the power off of the battery 60 through a warning light or a warning sound of an instrument panel in front of the vehicle, and turns off an engine switch (not shown) to realize the safety of the vehicle.
Normally, when the engine switch is off, the engine is turned off, and the XECU10 sends a parking range switching command to the SBW ECU31 under the power supply of the battery 60, and the SBW ECU31 drives the parking motor 322 to switch the shift switching mechanism 51 to the parking range. However, since the battery 60 is powered off at this time, the parking operation cannot be performed using the power of the battery 60, and since the engine is turned off and the generator 70 cannot supply power using the rotation of the engine, the parking operation cannot be performed by supplying power to the parking motor 322 after the engine switch is turned off. If the vehicle is stopped on a slope at this time, the vehicle may slip down the slope.
To address this situation, the XECU10 of the present invention includes: a power failure determination unit 11 that determines that a battery power failure has occurred when a first potential of a terminal of the parking motor 322 connected to the battery 60 detected by the battery potential sensor 80 becomes a low level; and an emergency avoidance processing unit 13 that, when the power failure determination unit 11 determines that the battery power-off has occurred, issues a parking range switching command to the SBW ECU31 to drive the parking motor 322, thereby switching the range switching mechanism 51 to the parking range.
According to the XECU10 configured as described above, when it is determined that the battery power outage has occurred, the power generation of the generator 70 is used to issue a parking range switching command to the SBW ECU31 in advance, and the shift switching mechanism 51 can be switched to the P range.
The XECU10 of the present invention may be configured such that, when the power failure determination unit 11 determines that a battery failure has occurred and the driver issues an engine off switch command, the emergency evacuation processing unit 13 issues a parking range switching command to the SBW ECU31 of the SBW system 30 and then shuts down the engine.
In this way, when a battery failure occurs and the driver issues an instruction to turn off the engine switch, the engine is not immediately turned off, but is turned off after the generator 70 is generated by the rotation of the engine to supply the electric power required for parking to complete the parking. Thus, the situation that the parking cannot be carried out due to the fact that the engine is turned off and the battery is powered off can be avoided. Even if the vehicle stops on a slope, the situation of sliding down the slope does not occur.
The XECU10 of the present invention further includes a parking position confirmation unit 16, the parking position confirmation unit 16 confirming whether or not the parking operation is completed by an encoder 321 that outputs a pulse signal at a predetermined angle in synchronization with the rotation of the rotor of the parking motor 322, and the parking position confirmation unit 16 does not shut down the engine until the parking operation is confirmed to be completed.
Case 2: when the vehicle is running, the battery 60 is powered off.
In consideration of such a situation, when the vehicle is running at a high speed, the battery 60 is powered off, and the driver of the vehicle knows the power-off information of the battery 60 through a warning light or a warning sound of an instrument panel in front, stops the vehicle while approaching, and turns off the engine switch. At this time, the same situation as in case 1 occurs, that is, since the battery 60 is powered off and the generator 70 cannot supply power due to the stop of the engine, the parking operation cannot be performed.
To this end, the XECU10 of the present invention includes: a power failure determination unit (11) which determines that a battery power failure has occurred when a first potential of a terminal of a parking motor (322) connected to a battery (60) detected by a battery potential sensor (80) becomes a low level; an emergency risk avoidance processing unit 13 that, when the power failure determination unit 11 determines that the battery power failure has occurred and the driver issues an instruction to turn off the engine switch, the emergency risk avoidance processing unit 13 issues a parking range switching instruction to the SBW ECU31 of the SBW system 30 to drive the parking motor 322 and switch the range switching mechanism 51 to the parking range; and a parking position confirmation unit 16 for confirming whether or not the parking operation is completed by an encoder 321 that outputs a pulse signal at a predetermined angle in synchronization with the rotation of the rotor of the parking motor 322, and for not shutting down the engine until the parking position confirmation unit confirms that the parking operation is completed.
In this way, when a battery failure occurs and the driver issues an instruction to turn off the engine switch, the engine is not immediately turned off, but is turned off after the generator 70 is generated by the rotation of the engine to supply the electric power required for parking to complete the parking. Thus, the situation that the parking cannot be carried out due to the fact that the engine is turned off and the battery is powered off can be avoided.
Case 3: when the vehicle load gradually increases, the battery 60 is powered off.
As the case where the vehicle load increases, for example, a case of ascending a slope, pulling a heavy object, or the like may be considered. At this time, the generator rotation speed Ne gradually decreases due to the increase in load. If the rotation speed is less than the predetermined threshold rotation speed N1, the generator 70 cannot generate sufficient power, and if the battery 60 is powered off at this time, the parking operation may not be performed.
In view of this situation, the XECU10 of the present invention executes the control as described above.
The XECU10 of the present invention further includes: a generator rotation speed determination unit 12, the generator rotation speed determination unit 12 determining whether or not the generator rotation speed Ne detected by the generator rotation speed sensor 100 is lower than a predetermined rotation speed threshold N1. When the power failure determination unit 11 determines that the battery power failure has occurred and the generator rotation speed determination unit 12 determines that the generator rotation speed Ne is lower than the predetermined rotation speed threshold value N1, the emergency avoidance processing unit 13 issues a parking range switching command to the SBW ECU31 to drive the parking motor 322, thereby switching the range switching mechanism 51 to the parking range.
As the generator rotation speed sensor 100, for example, an angle detector such as a resolver can be used, which detects a rotation angle (electrical angle information) of a rotation shaft of the generator 70 and calculates the generator rotation speed Ne based on the detected rotation angle. The rotation speed threshold N1 is stored in advance in the storage unit of the XECU 10.
According to the XECU10 configured as described above, when it is determined that the battery 60 is disconnected and the rotation speed of the generator 70 is lower than the predetermined rotation speed threshold N1, the parking range switching command is issued to the SBW ECU31 in advance, and the shift switching mechanism 51 can be switched to the P range. Thus, the unfavorable condition that the parking cannot be carried out due to the fact that the battery 60 is powered off and the generator 70 cannot provide enough power can be avoided, and the safety of the vehicle is guaranteed.
The XECU10 of the embodiment of the invention executes the following control.
Fig. 5 is a logic diagram showing the control of the XECU10 in case 3 of failure mode 1. As shown in fig. 5, in step S10, the XECU10 determines whether or not the battery 60 has failed, determines that battery outage has occurred when the first potential of the terminal of the parking motor 322 connected to the battery 60, which is detected by the battery potential sensor 80, becomes a low level (yes), and the process proceeds to step S11. In step S11, it is determined whether or not the generator rotation speed Ne detected by the generator rotation speed sensor 100 is lower than a predetermined rotation speed threshold value N1, and when the generator rotation speed Ne is lower than a predetermined rotation speed threshold value N1 (yes), the routine proceeds to step S12. In step S12, a parking range switching command is issued to the SBW ECU31 to drive the parking motor 322, thereby switching the range switching mechanism 51 to the parking range. Next, in step S13, the XECU10 confirms whether the parking operation is completed or not by the pulse signal of the encoder 321, and if yes, the process is ended, and if no, the process returns to step S12.
According to the control performed by the XECU10, when it is determined that the battery 60 is deenergized and the rotation speed of the generator 70 is lower than the predetermined rotation speed threshold N1, a parking range switching command is issued to the SBW ECU31 in advance to switch the range switching mechanism 51 to the P range. At this time, since the vehicle normally runs, the vehicle speed is generally higher than 30km/h, and the parking lock lever 42 is continuously popped up by the parking gear 41 at the vehicle speed, so that the parking action cannot be completed. When the vehicle speed reaches a certain value, for example, 5km/h, the parking lock lever 42 is fitted to the parking gear 41, thereby realizing the parking operation.
In this way, in the case where it is predicted that sufficient electric power may not be supplied to the parking system, the parking action may be performed using the electric power of the generator 70 in advance, ensuring the safety of the vehicle.
Case 4: when the vehicle power consumption increases, the battery 60 is powered off.
As the vehicle power consumption increases, for example, it is conceivable that the power consumption of electrical loads such as an air conditioner, an audio device, and a display device of the vehicle gradually increases. The vehicle includes a power consumption amount detection unit 120, and the power consumption amount detection unit 120 detects the power consumption amount per unit time PT of the electric load in real time. When the power consumption amount PT per unit time exceeds the predetermined power consumption amount threshold P1, if the battery 60 is powered off at this time, sufficient power supply may not be obtained by the power generation of the generator 70, and the parking operation may not be performed.
In this case, the XECU10 of the present invention further includes a power consumption amount determination unit 14, and the power consumption amount determination unit 14 determines whether or not the power consumption amount per unit time PT of the electric load detected by the power consumption amount detection unit 120 exceeds a predetermined power consumption amount threshold P1. When the power failure determination unit 11 determines that the battery is disconnected and the power consumption determination unit 14 determines that the power consumption per unit time PT of the electrical load exceeds the predetermined power consumption threshold P1, the emergency avoidance processing unit 13 issues a parking range switching command to the SBW ECU31 to drive the parking motor 322, thereby switching the range switching mechanism 51 to the parking range.
According to the XECU10 having this configuration, when the battery 60 is disconnected and it is predicted that sufficient power supply by the generator 70 may not be available, the power of the generator 70 is used in advance to issue a parking range switching command to the SBW ECU31 to switch the range switching mechanism 51 to the P range, so that the reliability of the parking operation can be ensured and the safety of the vehicle can be ensured.
(failure mode 2)
Fig. 6 is a schematic diagram showing failure mode 2. In this failure mode 2, the generator 70 is de-energized.
The case 2 corresponds to each of the four cases of the failure mode 1, and the case 2 will be described as an example.
In this case, the generator 70 is deenergized while the vehicle is traveling at a high speed. At this time, the battery 60 supplies power to the vehicle load as a power source of the vehicle. However, since the capacity of the battery 60 is limited, there is a possibility that the battery is used up. When the battery 60 runs out of charge or falls below the predetermined charge threshold TH1, there is a possibility that sufficient power cannot be supplied to the parking system and the parking operation cannot be performed.
To cope with this situation, the XECU10 of the present invention includes: a power failure determination unit 11 that determines that a generator power failure has occurred when the second potential of the terminal of the parking motor 322 connected to the generator 70 detected by the generator potential sensor 90 becomes a low level; a power amount determination unit 15, the power amount determination unit 15 determining whether or not the power amount SOC of the battery 60 detected by the power amount detection unit 110 is smaller than a predetermined power amount threshold TH 1; and an emergency danger avoiding processing unit 13 that, when the power failure determination unit 11 determines that the power-off of the generator has occurred and the electric quantity determination unit 15 determines that the electric quantity SOC of the battery 60 is lower than a predetermined electric quantity threshold TH1, issues a parking position switching command to the SBW ECU31 to drive the parking motor 322 and switch the position switching mechanism 51 to the parking position; and a parking position confirmation unit 16 for confirming whether or not the parking operation is completed by a pulse signal from the encoder 321 in the parking position confirmation unit 16.
Fig. 7 is a logic diagram showing the control of the XECU10 in failure mode 2. As shown in fig. 7, in step S20, the XECU10 determines whether or not the generator 70 has failed, determines that the generator power-off has occurred when the second potential of the terminal of the parking motor 322 connected to the generator 70, which is detected by the generator potential sensor 90, becomes a low level (yes), and proceeds to step S21. In step S21, it is determined whether or not the electric energy SOC of the battery cell 60 detected by the electric energy detection unit 110 is smaller than a predetermined electric energy threshold value TH1, and when the electric energy SOC is smaller than the predetermined electric energy threshold value TH1 (yes), the routine proceeds to step S22. In step S22, a parking range switching command is issued to the SBW ECU31 to drive the parking motor 322, thereby switching the range switching mechanism 51 to the parking range. Next, in step S23, the XECU10 confirms whether the parking operation is completed or not by the pulse signal of the encoder 321, and if yes, the process is ended, and if no, the process returns to step S22.
According to the XECU10 configured as described above, when it is determined that the generator is turned off and the electric power SOC of the battery 60 is smaller than the predetermined electric power threshold TH1, the parking range switching command is issued to the SBW ECU31 in advance to switch the range switching mechanism 51 to the P range. When the vehicle speed reaches a certain value, for example, 5km/h, the parking lock lever 42 is fitted to the parking gear 41, thereby realizing the parking operation. Therefore, when the parking system is predicted to possibly fail to realize the parking action, the parking action can be realized by utilizing the electric power of the battery 60 in advance, and the safety of the vehicle is ensured.
(failure mode 3)
Fig. 8 is a schematic diagram showing failure mode 3. In this failure mode 3, both the battery 60 and the generator 70 are powered down.
When the battery 60 and the generator 70 are both powered off, the SBW system 30 cannot be powered through the parallel connection of the battery 60 and the generator 70. At this time, in order to achieve parking, the XECU10 of the embodiment of the present invention supplies electric power to the EPB system 40 through the battery 60 and the generator 70 to fix the vehicle using the EPB system 40. The EPB system 40 has a well-known structure, and thus, a detailed description thereof is omitted.
The XECU10 of the embodiment of the invention includes: a power failure determination unit 11 that determines that the power failure of the battery 60 and the generator 70 has occurred when a first potential of a terminal of the parking motor 322 connected to the battery 60, which is detected by the battery potential sensor 80, becomes a low level and a second potential of a terminal of the parking motor 322 connected to the generator 70, which is detected by the generator potential sensor 90, becomes a low level; and an emergency evacuation processing unit 13 for turning on an EPB switch (not shown) to fix the vehicle by the EPB system 40 when the power failure determination unit 11 determines that the power failure occurs in the battery 60 or the generator 70.
Fig. 9 shows a logic diagram of the control of the parking control apparatus in the failure mode 3. As shown in fig. 9, in step S30, it is determined whether or not the battery 60 and the generator 70 are malfunctioning, and when the first potential of the terminal of the parking motor 322 connected to the battery 60 detected by the battery potential sensor 80 becomes low and the second potential of the terminal of the parking motor 322 connected to the generator 70 detected by the generator potential sensor 90 becomes low, it is determined that a power failure has occurred (yes), and the process proceeds to step S31. In step S31, emergency evacuation processing unit 13 turns on an EPB switch (not shown) to fix the vehicle by EPB system 40.
The EPB system 40 is constituted by a motor, a gear, and a wire harness connected to a brake drum provided at the rear wheel. When the XECU10 instructs the EPB switch to be turned on, the motor of the EPB system 40 drives the gear to rotate by the power supplied from the battery 60 and the generator 70, thereby driving the wire harness connected to the gear to operate the brake drum, applying a braking force to the rear wheels, and completing the vehicle fixation.
According to the XECU10 configured as described above, when it is determined that both the battery 60 and the generator 70 are disconnected from the SBW system 30, an instruction is automatically issued to the EPB system 40, and the EPB system 40 can complete the vehicle fixation.
The present invention has been described above with reference to the embodiments, but it should be understood that the present invention is not limited to the embodiments and the configurations described above. The present invention also includes various modifications and modifications within the equivalent scope. In addition, various combinations and modes, and other combinations and modes including only one element, one or more elements, and one or less elements also belong to the scope and the idea of the present invention.
In the above embodiment, a general fuel-powered vehicle is taken as an example for description. However, the present invention is not limited to this, and may be applied to an electric vehicle, a hybrid vehicle, and the like. In this case, the Generator 70 is configured as an Integrated Starter Generator (ISG) of an electromechanical type, and has a power generation function of generating power (regenerative power) by rotation of a crankshaft and an axle of the engine and a power running function of applying a driving force (rotational force) to the crankshaft. Further, the starter has a function as a motor (starter) for applying an initial rotational force to the crankshaft at the time of engine start.
In the above embodiment, when power is cut off in either one of the battery 60 and the generator 70, the X ECU10 actively gives a parking range switching command to the SBW system 30, and the parking operation is performed by using electric power supplied from the other of the battery 60 and the generator 70 in advance. However, the present invention is not limited to this, and when the power outage occurs in either the battery 60 or the generator 70, the X ECU10 may actively give a command to the SBW system 30 and/or the EPB system 40 to use the electric power supplied from the other of the battery 60 and the generator 70 in advance to fix the vehicle.
In the above embodiment, when both the battery 60 and the generator 70 are disconnected from the SBW system 30, the EPB system 40 is used to fix the vehicle. However, the present invention is not limited to this, and an ECB (Electronically Controlled Brake) system may be used to fix the vehicle.
In the failure mode 1, the generator rotation speed determination unit is not essential, and the emergency avoidance processing unit 13 may be configured to issue a parking range switching command to the SBW ECU31 to drive the parking motor 322 and switch the range switching mechanism 51 to the parking range when the power failure determination unit 11 determines that the battery 60 is disconnected.
In the failure mode 2, the electric power amount determination unit is not essential, and the emergency evacuation processing unit 13 may be configured to issue a parking range switching command to the SBW ECU31 to drive the parking motor 322 and switch the range switching mechanism 51 to the parking range when the power failure determination unit 11 determines that the power generator 70 is deenergized.
In the above-described embodiment, as the generator revolution speed sensor 100, an angle detector such as a resolver that measures the rotation angle of the rotating shaft of the generator 70 is exemplified. However, the present invention is not limited to this, and since the rotating shaft of the generator 70 is connected to the crankshaft of the engine, the engine speed detected by an engine speed sensor, which is a crank angle sensor that detects the crankshaft rotation angle of the engine, may be used as the generator speed.
In the above-described embodiment, the detection of the power failure is exemplified by detecting the first potential of the terminal of the parking motor 322 connected to the battery 60 by the battery potential sensor 80, and detecting the second potential of the terminal of the parking motor 322 connected to the generator 70 by the generator potential sensor 90. However, the present invention is not limited to this, and any method may be adopted as long as the power failure of the battery or the generator can be detected.
It should be noted that the execution order of the operations, the sequence, the steps, the stages, and the like in the apparatus, the system, the program, and the method shown in the claims, the description, and the drawings is not particularly explicitly expressed as "before", and the like, and the output of the previous process can be realized in an arbitrary order as long as it is not used in the subsequent process. Even if the operational flow in the claims, the specification, and the drawings is described using "first", "next", and the like for convenience of description, it does not mean that the operational flow must be executed in this order.
Claims (10)
1. A parking control apparatus (10) applied to a vehicle having an electronic parking system including an SBW system (30) driven by a parking motor (322) having only a battery (60) and a generator (70) as a power source of the vehicle, the parking control apparatus being connected to the battery (60) and the generator (70), respectively,
the parking control apparatus includes:
a power failure determination unit (11) that determines that a power failure has occurred when a first potential of a terminal of the parking motor (322) connected to the battery (60), which is detected by a battery potential sensor (80), or a second potential of a terminal of the parking motor (322) connected to the generator (70), which is detected by a generator potential sensor (90), becomes a low level; and
and an emergency evacuation processing unit (13) that, when the power failure determination unit (11) determines that a power failure has occurred, issues a parking range switching command to an SBW ECU (31) of the SBW system (30).
2. The parking control apparatus according to claim 1,
when a first potential of a terminal of the parking motor (322) connected to the battery (60) detected by the battery potential sensor (80) becomes a low level, the power failure determination unit (11) determines that a battery failure has occurred,
the parking control device further includes a generator rotation speed determination unit (12), the generator rotation speed determination unit (12) determining whether or not a generator rotation speed (Ne) detected by a generator rotation speed sensor (100) or an engine rotation speed sensor is lower than a rotation speed threshold (N1),
when the power failure determination unit (11) determines that a battery failure has occurred and the generator rotation speed determination unit (12) determines that the generator rotation speed (Ne) is lower than a rotation speed threshold (N1), the emergency evacuation processing unit (13) issues a parking range switching command to an SBW ECU (31) of the SBW system (30).
3. The parking control apparatus according to claim 1,
when a first potential of a terminal of the parking motor (322) connected to the battery (60) detected by the battery potential sensor (80) becomes a low level, the power failure determination unit (11) determines that a battery failure has occurred,
when the power failure judgment part (11) judges that the battery failure occurs and a driver sends an instruction of disconnecting an engine switch, the emergency danger avoiding processing part (13) sends a parking gear switching instruction to an SBW ECU (31) of the SBW system (30) before the engine is closed.
4. The parking control apparatus according to claim 1,
when a first potential of a terminal of the parking motor (322) connected to the battery (60) detected by the battery potential sensor (80) becomes a low level, the power failure determination unit (11) determines that a battery failure has occurred,
the parking control device further comprises a power consumption amount determination unit (14), wherein the power consumption amount determination unit (14) determines whether or not the power consumption amount per unit time (PT) of the electrical load detected by the power consumption amount detection unit (120) exceeds a power consumption amount threshold (P1),
when the power failure judgment part (11) judges that a battery failure occurs and the power consumption judgment part (14) judges that the power consumption (PT) of the electric load per unit time exceeds a power consumption threshold (P1), the emergency danger avoiding processing part (13) sends a parking gear switching instruction to an SBW ECU (31) of the SBW system (30).
5. The parking control apparatus according to claim 1,
the power failure determination unit (11) determines that a generator failure has occurred when a second potential of a terminal of the parking motor (322) connected to the generator (70) detected by a generator potential sensor (90) becomes a low level,
the parking control device further comprises an electric quantity judging part (15), the electric quantity judging part (15) judges whether the electric quantity (SOC) of the battery (60) detected by the electric quantity detecting part (110) is smaller than an electric quantity threshold value (TH1),
the power failure judgment part (11) judges that a generator failure occurs and the power failure judgment part (15) judges that the electric quantity (SOC) of the battery (60) is smaller than an electric quantity threshold value (TH1), and the emergency danger avoiding processing part (13) sends a parking gear switching instruction to an SBW ECU (31) of the SBW system (30).
6. The parking control apparatus according to claim 1,
the power failure determination unit (11) determines that a generator failure has occurred when a second potential of a terminal of the parking motor (322) connected to the generator (70) detected by a generator potential sensor (90) becomes a low level,
the parking control device further comprises a power consumption amount determination unit (14), wherein the power consumption amount determination unit (14) determines whether or not the power consumption amount per unit time (PT) of the electrical load detected by the power consumption amount detection unit (120) exceeds a power consumption amount threshold (P1),
when the power failure determination unit (11) determines that a generator failure has occurred and the power consumption determination unit (14) determines that the power consumption (PT) per unit time of the electrical load exceeds a power consumption threshold (P1), the emergency evacuation processing unit (13) issues a parking range switching instruction to an SBW ECU (31) of the SBW system (30).
7. The parking control apparatus according to claim 1,
the power failure determination unit (11) determines that a generator failure has occurred when a second potential of a terminal of the parking motor (322) connected to the generator (70) detected by a generator potential sensor (90) becomes a low level,
the parking control apparatus further includes: an electric quantity judging unit (15), wherein the electric quantity judging unit (15) judges whether the electric quantity (SOC) of the battery (60) detected by the electric quantity detecting unit (110) is smaller than an electric quantity threshold value (TH 1); and a power consumption amount determination unit (14) for determining whether or not the power consumption amount per unit time (PT) of the electric load detected by the power consumption amount detection unit (120) exceeds a power consumption amount threshold (P1),
the power failure judgment part (11) judges that a generator failure occurs, the power consumption judgment part (14) judges that the unit time power consumption (PT) of an electric load exceeds a power consumption threshold (P1) and passes through the power consumption judgment part (15) judges that the electric quantity (SOC) of the storage battery (60) is less than a power quantity threshold (TH1), and the emergency danger avoiding processing part (13) sends a parking gear switching instruction to an SBW ECU (31) of an SBW system (30).
8. The parking control apparatus according to any one of claims 1 to 7,
the parking device is further provided with a parking position confirmation unit (16) for confirming whether or not the parking operation is completed by an encoder (321) that outputs a pulse signal at a predetermined angle in synchronization with the rotation of the rotor of the parking motor (322), and the parking position confirmation unit does not shut down the engine until the completion of the parking operation is confirmed.
9. A parking control apparatus (10) applied to a vehicle having an electronic parking system including an EPB system (40) having only a battery (60) and a generator (70) as a power source of the vehicle, the parking control apparatus being connected to the battery (60) and the generator (70) respectively,
the parking control apparatus includes:
a power failure determination unit (11) that determines that a power failure has occurred when a first potential of a terminal of the parking motor (322) connected to the battery (60) detected by a battery potential sensor (80) and a second potential of a terminal of the parking motor (322) connected to the generator (70) detected by a generator potential sensor (90) become low; and
and an emergency hedge processing unit (13) that operates the EPB system (40) when the power failure determination unit (11) determines that a power failure has occurred.
10. The parking control apparatus according to any one of claims 1 to 9,
the power failure detection device further comprises a warning presentation unit that notifies a driver when the power failure determination unit determines that the power failure has occurred.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110806453.3A CN114906116A (en) | 2021-07-16 | 2021-07-16 | Parking control device and parking control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110806453.3A CN114906116A (en) | 2021-07-16 | 2021-07-16 | Parking control device and parking control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116811829A (en) * | 2023-08-31 | 2023-09-29 | 江铃汽车股份有限公司 | Braking control method and system for parking gear faults and computer equipment |
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