Control method of vehicle electronic parking brake device

Abstract

The invention discloses a control method of an electronic parking brake device of a vehicle. The first embodiment comprises the following steps: when a user starts an engine, the electronic parking brake controller captures the rotating speed of the engine and temporarily stores the just captured rotating speed of the engine; if the latest engine rotating speed is in the engine starting rotating speed interval and the previous engine rotating speed is in the engine static rotating speed interval, the electronic parking brake controller judges that the engine is just started, and brake calipers are controlled not to enter a locking state; when the user releases the brake lever, the electronic parking brake controller judges that the engine state of the engine is changed into a post-engine-starting state; and when the user presses the brake rod again and the electronic parking brake controller judges that the opening time of the brake rod switch reaches the preset opening duration, the electronic parking brake controller controls the brake calipers of the electronic parking brake device to act to enter a locking state.

Description

Technical Field

[0001] The present invention relates to a control method for a vehicle electronic parking brake device, and in particular to a control method for a motorcycle electronic parking brake device. Background Art

[0002] Currently, the parking function of most motorcycles is operated mechanically. That is, the motorcyclist must apply force to rotate a parking handle to a certain angle or move it a certain distance to pull a parking wire to transmit force to a rear brake, so that the rear brake generates braking force to prevent the motorcycle from moving due to uneven or inclined road conditions.

[0003] However, the above-mentioned conventional method of parking a motorcycle by operating the parking handle has the following disadvantages: (1) It is laborious; (2) Since the motorcyclist manually pulls the parking handle, he cannot grasp the exact time when parking is actually required; (3) The motorcyclist pulls the parking handle to use the parking function and often forgets to release the parking handle after using the parking function, causing the brake pad to rub against the brake disc for a long time, causing the brake pad and brake disc to deform; (4) The parking handle requires additional considerable mechanical space. Therefore, the applicant of the present invention filed an invention application for a "motorcycle with an electronic parking brake control function", which was examined and filed as Publication No. 1773318. Publication No. 1773318 mainly discloses that the motorcycle with an electronic parking brake control function includes an engine, an electronic parking brake (EPB) device, an automatic parking enable switch, a brake lever, a brake disc, and a throttle handle. The electronic parking brake device can automatically execute an automatic parking mode or an automatic handbrake mode according to an engine speed of the engine when the automatic parking enabling switch is turned on.

[0004] As shown in Table 1 of the aforementioned Patent Specification No. 1773318, when the engine is in the starting state with an engine speed of 900-2500 rpm, if the throttle opening is less than 1°, the engine speed is less than 1500 rpm, and the vehicle speed is less than 1 km / hr, and the brake lever is pressed for 2 seconds, the electronic parking brake will automatically lock, actuating a brake caliper to brake the brake disc. However, if the engine has just been started, the throttle opening will inevitably be less than 1°, the engine speed will inevitably be less than 1500 rpm, and the vehicle speed will inevitably be less than 1 km / hr, and the user will inevitably press the brake lever. After the engine is successfully started, if the user does not immediately release the brake lever within 2 seconds, the electronic parking brake will fully fall into the automatic parking lock condition, causing the brake caliper to brake the brake disc. At this time, if the user wants to move the motorcycle slightly by manpower without operating the accelerator handle, the user can only turn off the automatic parking enable switch to unlock the electronic parking brake device before pushing the motorcycle. This causes the user to be troublesome when the motorcycle is just started and still needs to be moved manually. Summary of the Invention

[0005] [Problems to be Solved by the Invention]

[0006] Therefore, an object of the present invention is to provide a control method for a vehicle electronic parking brake device.

[0007] [Technical means to solve the problem]

[0008] Therefore, the first control method of the vehicle electronic parking brake device of the present invention is applicable to a motorcycle comprising an engine, an electronic parking brake device, an electronic parking brake controller, a brake lever and a brake lever switch, wherein the control method of the vehicle electronic parking brake device comprises the following steps: (A) when the user starts the engine, the electronic parking brake controller captures the engine speed of the engine and stores the just-captured engine speed as a temporary engine speed; (B) under the condition that the latest engine speed is within the engine starting speed range and the temporary engine speed is within the engine static speed range, the electronic parking brake controller determines the (C) in the engine just-started state, when the user releases the brake lever, the electronic parking brake controller determines that the engine state of the engine has changed to the engine-started state; and (D) in the engine-started state, when the user presses the brake lever again, the electronic parking brake controller determines that the time when the brake lever switch is turned on reaches a preset turn-on duration, and then the electronic parking brake controller controls the brake caliper of the electronic parking brake device to actuate and enter the locked state.

[0009] In some embodiments of the control method of the first vehicle electronic parking brake device of the present invention, the motorcycle further includes an engine control unit. In step (A), the electronic parking brake controller captures the engine speed from the engine control unit once every 10 milliseconds.

[0010] In some embodiments of the first vehicle electronic parking brake control method of the present invention, in step (B), the engine starting speed range is approximately 900 rpm to 2500 rpm, and the engine stationary speed range is approximately 0 rpm to 900 rpm.

[0011] In some embodiments of the control method of the first vehicle electronic parking brake device of the present invention, in step (C), if the electronic parking brake controller times the closing time of the brake lever switch to a preset closing duration, the electronic parking brake controller determines that the engine state of the engine has changed to the engine start state to enter the automatic parking mode after engine start.

[0012] In some embodiments of the first method for controlling a vehicle electronic parking brake device according to the present invention, in step (C), the preset closing duration is approximately 100 milliseconds.

[0013] In some embodiments of the first method for controlling a vehicle electronic parking brake device of the present invention, in step (D), the preset on-duration time is about 2 seconds.

[0014] In some embodiments of the control method of the first vehicle electronic parking brake device of the present invention, the motorcycle further includes an automatic parking enable switch electrically connected to the electronic parking brake controller. In step (A), the user starts the engine with the automatic parking enable switch turned on.

[0015] In addition, a second method for controlling a vehicle electronic parking brake device of the present invention is applicable to a motorcycle comprising an engine, an electronic parking brake device, an electronic parking brake controller, a brake lever and a brake lever switch, wherein the method for controlling the vehicle electronic parking brake device comprises the following steps: (a) when a user starts the engine, the electronic parking brake controller captures the engine speed of the engine and stores the newly captured engine speed as a temporary engine speed; (b) under the condition that the latest engine speed is within the engine starting speed range and the temporary engine speed is within the engine stationary speed range, the electronic parking brake controller determines that the engine state of the engine is the engine just-started state, controls the brake caliper of the electronic parking brake device not to enter the locked state, and starts counting an engine starting time; and (c) when the user continues to press the brake lever, if the electronic parking brake controller determines that the engine starting time is greater than a preset locking time, the electronic parking brake controller controls the brake caliper of the electronic parking brake device to actuate and enter the locked state.

[0016] In some embodiments of the second vehicle electronic parking brake control method of the present invention, the motorcycle further includes an engine control unit. In step (a), the electronic parking brake controller captures the engine speed from the engine control unit every 10 milliseconds.

[0017] In some embodiments of the second vehicle electronic parking brake control method of the present invention, in step (b), the engine starting speed range is approximately 900 rpm to 2500 rpm, and the engine static speed range is approximately 0 rpm to 900 rpm.

[0018] In some embodiments of the second method for controlling a vehicle electronic parking brake device of the present invention, in step (c), the preset locking time is about 4 seconds.

[0019] In some embodiments of the second method for controlling a vehicle electronic parking brake device of the present invention, the motorcycle further includes an automatic parking enable switch electrically connected to the electronic parking brake controller. In step (a), the user starts the engine with the automatic parking enable switch turned on.

[0020] In some embodiments of the second method for controlling a vehicle electronic parking brake device of the present invention, in step (b), when the engine start time is greater than 2 seconds, the electronic parking brake controller enters the automatic parking mode after engine start.

[0021] [Effects of the Invention]

[0022] The effectiveness of the present invention lies in: by using the electronic parking brake controller to further distinguish the engine starting state into technical features such as the engine just started and the engine after starting, it can achieve the following: (1) when the engine has just started, if the user continues to press the brake lever for a long time, the brake caliper of the electronic parking brake device will not lock, so the user can easily move the motorcycle manually, greatly improving the convenience of using the electronic parking brake (EPB) system; (2) when the engine has just started, the user must continue to press the brake lever for a long time (for example, more than 4 seconds) before the brake caliper of the electronic parking brake device will automatically lock, thereby solving the problem disclosed in the aforementioned patent announcement No. I773318 that the motorcycle will automatically lock if the user does not immediately release the brake lever within 2 seconds during the process of starting the motorcycle, thereby improving the convenience of using the electronic parking brake system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features and effects of the present invention will be more clearly seen in the following embodiments with reference to the accompanying drawings, in which:

[0024] Figure 1 is a right side view illustrating a motorcycle to which the control method of the vehicle electronic parking brake device of the present invention is applicable;

[0025] Figure 2 is a top view illustrating that the motorcycle includes components such as a left brake lever, a right brake lever, and a throttle grip;

[0026] Figure 3 It is a partial enlarged side view, illustrating that the motorcycle also includes an electronic parking brake device;

[0027] Figure 4 is a partially enlarged cross-sectional view illustrating the electronic parking brake device;

[0028] Figure 5 is a block diagram illustrating that the motorcycle further includes components such as a main switch, an automatic parking enable switch, an automatic parking enable switch, a side stand switch, an engine control unit (ECU), an anti-lock braking system (ABS), and an electronic parking brake controller;

[0029] Figure 6 is a flow chart illustrating a first embodiment of a method for controlling a vehicle electronic parking brake device according to the present invention; and

[0030] Figure 7 FIG. 2 is a flow chart illustrating a second embodiment of a method for controlling a vehicle electronic parking brake device according to the present invention.

[0031] Reference Signs List

[0032] 1. Brake disc

[0033] 2····Rear swingarm

[0034] 3····Electronic parking brake

[0035] 31···Motor

[0036] 32···Reduction gear unit

[0037] 320···Gear housing

[0038] 321···driving gear

[0039] 322···First gear set

[0040] 3221··First large gear

[0041] 3222··First pinion

[0042] 323···Second gear set

[0043] 3231··Second largest gear

[0044] 3232··Second pinion

[0045] 324···Output gear

[0046] 33···Propulsion unit

[0047] 330···Threaded part

[0048] 331···Adjusting screw

[0049] 332···Adjusting nut

[0050] 34···Brake calipers

[0051] 340···caliper body

[0052] 3401··Cylinder bore

[0053] 3402··Brake oil channel

[0054] 341···Piston

[0055] 3412··Push Wall

[0056] 3413··Surrounding Wall

[0057] 3414··Accommodation space

[0058] 342···Brake pads

[0059] 343···Brake pads

[0060] 35···Fixed bracket

[0061] 4····Rear wheel

[0062] 50···Leading head

[0063] 51···Brake lever

[0064] 53···Throttle handle

[0065] 54···Side stand

[0066] 6. Engine

[0067] 70···Main switch

[0068] 71···Brake lever switch

[0069] 72···Automatic parking enable switch

[0070] 73···Side stand switch

[0071] 74···Engine Control Unit (ECU)

[0072] 75···Anti-lock braking system (ABS)

[0073] 76···Communication interface

[0074] 8····Electronic parking brake controller

[0075] 80···Microcontroller Unit (MCU)

[0076] 81···Current sensor

[0077] 82···Motor drive circuit

[0078] Steps S910 to S917

[0079] Steps S920 to S924. DETAILED DESCRIPTION

[0080] See Figures 1 to 6 The motorcycle, to which the first embodiment of the control method for the electronic parking brake device of the present invention is applied, includes a brake disc 1, a rear swingarm 2, an electronic parking brake (EPB) device 3, a front wheel (not shown), a rear wheel 4, a handlebar 50, two brake levers 51, a throttle grip 53, a side stand 54, an engine 6, a main switch 70, at least one brake lever switch 71, an automatic parking enable switch 72, a side stand switch 73, an engine control unit (ECU) 74, an anti-lock braking system (ABS) 75, and an electronic parking brake controller 8. In this first embodiment, the brake levers 51 are respectively disposed on the left and right sides of the handlebar 50, and each brake lever 51 is provided with a brake lever switch 71.

[0081] like Figure 1 、 3 As shown in Figures 4 and 5, the electronic parking brake device 3 is mounted on the rear swing arm 2. In this first embodiment, the electronic parking brake device 3 includes a motor 31, a reduction gear unit 32, a driving unit 33, a brake caliper 34, and a mounting bracket 35 for mounting the brake caliper 34. The motor 31 can be controlled by the electronic parking brake controller 8 to enter a locked state, thereby actuating the brake caliper 34 and thereby braking the brake disc 1. Alternatively, the motor 31 can be controlled by the electronic parking brake controller 8 to enter an unlocked state, thereby actuating the brake caliper 34 to release the brake disc 1.

[0082] In the first embodiment, the reduction gear unit 32 and the pushing unit 33 are disposed between the brake caliper 34 and the motor 31. More specifically, the motor 31, the reduction gear unit 32, and the pushing unit 33 are assembled on the brake caliper 34.

[0083] In this first embodiment, the brake caliper 34 includes a caliper body 340 having a cylinder bore 3401, a piston 341, and two spaced-apart brake pads 342 and 343. The motor 31 is used to provide the power required for the piston 341 to push the brake pads 342 and 343. The reduction gear unit 32 then decelerates the rotational speed provided by the motor 31, increasing the torque to drive the pushing unit 33, enabling the pushing unit 33 to push the piston 341. When the brake pads 342 and 343 are pushed by the piston 341, they clamp the brake disc 1, enabling the motorcycle to achieve automatic parking or automatic handbrake.

[0084] In the first embodiment, the reduction gear unit 32 includes a gear housing 320, a driving gear 321, a first gear set 322, a second gear set 323, and an output gear 324. The gear housing 320 accommodates the driving gear 321, the first gear set 322, the second gear set 323, and the output gear 324, wherein the driving gear 321 can be driven by the motor 31.

[0085] The first gear set 322 includes a first large gear 3221 driven by the driving gear 321, and a first small gear 3222 coaxially rotating with the first large gear 3221 and having a smaller diameter than the first large gear 3221. In this first embodiment, the brake disc 1 and the first small gear 3222 are located on opposite sides of the first large gear 3221.

[0086] The second gear set 323 includes a second large gear 3231 driven by the first small gear 3222 of the first gear set 322, and a second small gear 3232 that rotates coaxially with the second large gear 3231 and has a smaller diameter than the second large gear 3231. In this first embodiment, the second gear set 323 is arranged in an opposite direction from the first gear set 322. That is, while the brake disc 1 and the first small gear 3222 are located on opposite sides of the first large gear 3221, the second large gear 3231 and the brake disc 1 are located on opposite sides of the second small gear 3232. In other words, the first small gear 3222 and the second large gear 3231 are arranged outward, thereby less likely to interfere with the arrangement of the motor 31 and the brake caliper 34. In this first embodiment, the output gear 324 is driven by the second small gear 3232 of the second gear set 323.

[0087] In this first embodiment, the pushing unit 33 includes an adjustment screw 331 and an adjustment nut 332. The adjustment screw 331 can be rotated by the output gear 324. The adjustment nut 332 is threadedly connected to the adjustment screw 331 via a threaded portion 330 and is moved by the adjustment screw 331. In this first embodiment, the threaded portion 330 is a trapezoidal thread to provide sufficient friction to achieve a locking effect. When the motor 31 is powered off, there is no relative movement between the adjustment screw 331 and the adjustment nut 332.

[0088] The piston 341 is disposed in the cylinder bore 3401 and can be pushed by the adjusting nut 332. In this first embodiment, the piston 341 has a pushing wall 3412 for pushing the brake pad 342, and a surrounding wall 3413 extending from the pushing wall 3412 away from the brake pads 342 and 343. The pushing wall 3412 and the surrounding wall 3413 jointly define an accommodating space 3414 that accommodates the adjusting screw 331 and the adjusting nut 332 and is connected to the cylinder bore 3401.

[0089] In this first embodiment, the electronic parking brake controller 8 is electrically connected to the motor 31, the main switch 70, the brake lever switch 71, the automatic parking enable switch 72, the side stand switch 73, the engine control unit (ECU) 74 and the anti-lock braking system (ABS) 75, and includes a current sensor 81 for sensing the current value flowing through the motor 31, a motor drive circuit 82 for driving the motor 31 to operate, and a micro control unit (MCU) 80 electrically connected to the current sensor 81 and the motor drive circuit 82.

[0090] like Figure 4 、 5 As shown, regarding the method for determining whether the motor 31 has been locked, when the electronic parking brake controller 8 drives the motor 31 to rotate forward to drive the brake caliper 34 to clamp the brake disc 1, the electronic parking brake controller 8 waits for a transient time (e.g., approximately 200 milliseconds) and then determines whether the current value sensed by the current sensor 81 is greater than a first current threshold value (e.g., approximately 15 amps). If so, it indicates that the motor 31 has entered the locked state. Conversely, regarding the method for determining whether the motor 31 has been unlocked, when the electronic parking brake controller 8 drives the motor 31 to rotate reverse to drive the brake caliper 34 to release the brake disc 1, the electronic parking brake controller 8 waits for the transient time (e.g., approximately 200 milliseconds) and then determines whether the current value sensed by the current sensor 81 is less than a second current threshold value. The second current threshold value is less than the first current threshold value and can be, for example, approximately 5 amps. If so, it indicates that the motor 31 has entered the unlocked state.

[0091] like Figure 1 、 2 As shown in Figures 5 and 6, in the first embodiment of the control method of the vehicle electronic parking brake device of the present invention, first, as shown in step S910, when the automatic parking enable switch 72 is turned on, the user starts to start the engine 6, wherein the user presses the brake lever 51 and presses the start switch (not shown) to start the engine 6.

[0092] Then, as shown in step S911, the microcontroller unit (MCU) 80 of the electronic parking brake controller 8 retrieves engine speed and throttle position data from the engine control unit (ECU) 74, and vehicle speed data from the anti-lock braking system (ABS) 75. The MCU 80 then stores the newly retrieved engine speed as a temporary engine speed. In this first embodiment, the electronic parking brake controller 8 retrieves the engine speed from the engine control unit 74 every 10 milliseconds.

[0093] Next, as shown in step S912, if the conditions are met that the latest engine speed is within the engine starting speed range and the temporarily stored engine speed (i.e., the previous engine speed) is within the engine stopping speed range, the microcontroller unit 80 determines that the engine state of the engine 6 is the engine just-started state and controls the brake caliper 34 of the electronic parking brake device 3 not to enter the locked state. For example, in this first embodiment, assuming that the engine starting speed range is approximately 900 rpm to 2500 rpm and the engine stopping speed range is approximately 0 rpm to 900 rpm, if the latest engine speed is 800 rpm and the previous engine speed is 600 rpm, it indicates that the engine 6 is still in the engine stopping state. For another example, if the latest engine speed is 1000 rpm and the previous engine speed is 800 rpm, it indicates that the engine 6 has just changed from the engine stopping state to the engine just-started state.

[0094] Next, as shown in step S913, when the user releases the brake lever 51 after the engine 6 has just started, the microcontroller unit 80 cannot receive the conduction signal from the brake lever switch 71. Therefore, as shown in step S914, the microcontroller unit 80 measures whether the off time of the brake lever switch 71 reaches a predetermined off duration (e.g., approximately 100 milliseconds). If not, the microcontroller unit 80 continues with the timing step S914.

[0095] On the other hand, if the off time of the brake lever switch 71 has reached the preset off duration, indicating that the user has continuously released the brake lever 51 for the preset off duration, then as shown in step S915, the micro control unit 80 will determine that the engine state of the engine 6 has changed to the engine start state to enter the engine start automatic parking mode.

[0096] Then, as shown in step 916, in the first embodiment, in the automatic parking mode after engine start, if the micro-control unit 80 receives a signal from the brake lever switch 71 (i.e., the user presses the brake lever 51 again), and determines that the brake lever switch 71 has been on for a predetermined duration, the engine speed is less than a predetermined speed, the vehicle speed is less than a predetermined speed, and the throttle opening is less than a predetermined opening, the micro-control unit 80 controls the motor 31 of the electronic parking brake (EPB) device 3 to lock, thereby driving the brake caliper 34 to brake the brake disc 1. In the first embodiment, the predetermined duration can be, for example, approximately 2 seconds, the predetermined speed is approximately 1500 rpm, the predetermined vehicle speed is approximately 1 km / hr, and the predetermined opening is approximately 1°.

[0097] Then, as shown in step S917, when the motor 31 is in the locked state, if the micro control unit 80 detects that the throttle opening is greater than the preset opening, the micro control unit 80 controls the motor 31 to switch from the locked state to the unlocked state to drive the brake caliper 34 to release the brake disc 1.

[0098] Furthermore, in the first embodiment, when the motor 31 is in the locked state and the engine speed increases to within the engine travel speed range, the micro control unit 80 controls the motor 31 to switch from the locked state to the unlocked state. In the first embodiment, the engine travel speed range is above 2500 rpm.

[0099] Furthermore, in this first embodiment, the microcontroller unit 80 can also activate an automatic parking brake mode when the engine is stationary. When the engine speed is within the engine stationary speed range (e.g., 0 rpm to 900 rpm), if the microcontroller unit 80 determines that the side stand switch 73 is on and the vehicle speed is less than a predetermined speed (e.g., 1 km / hr), the microcontroller unit 80 controls the motor 31 to enter the locked state. The motorcyclist can activate the side stand switch 73 by lowering the side stand 54. If the microcontroller unit 80 determines that the side stand switch 73 is off (because the side stand 54 has been retracted by the motorcyclist), the microcontroller unit 80 controls the motor 31 to switch from the locked state to the unlocked state. Furthermore, in this first embodiment, when the motorcyclist lowers the side stand 54, causing the side stand switch 73 to be on, the side stand switch 73 transmits a side stand switch on signal to the engine control unit 74, causing the engine 6 to shut down.

[0100] See Figures 1 to 5 7. In the second embodiment of the control method of the vehicle electronic parking brake device of the present invention, first, as shown in step S920, when the automatic parking enable switch 72 is turned on, the user starts the engine 6, wherein the user presses the brake lever 51 and presses the start switch to start the engine 6.

[0101] Then, as shown in step S921, the microcontroller unit 80 of the electronic parking brake controller 8 retrieves engine speed and throttle position data from the engine control unit 74, and vehicle speed data from the anti-lock braking system 75. The microcontroller unit 80 then stores the newly retrieved engine speed as a temporary engine speed. In this second embodiment, the electronic parking brake controller 8 retrieves the engine speed from the engine control unit 74 every 10 milliseconds.

[0102] Next, as shown in step S922, if the conditions are met that the latest engine speed is within the engine starting speed range and the temporarily stored engine speed (i.e., the previous engine speed) is within the engine stopping speed range, the microcontroller unit 80 determines that the engine 6 is in the engine just-started state, controls the brake caliper 34 to not enter the locked state, and begins counting an engine starting time. The engine starting speed range is approximately 900 rpm to 2500 rpm, and the engine stopping speed range is approximately 0 rpm to 900 rpm. In this second embodiment, when the engine starting time is greater than 2 seconds, the electronic parking brake controller enters the automatic parking mode after engine starting.

[0103] Then, as shown in step S923, while the user continues to press the brake lever 51, if the micro-control unit 80 determines that the engine start time is greater than a preset lock time, the micro-control unit 80 controls the brake caliper 34 to actuate and enter a lock state to brake the brake disc 1. In this second embodiment, the preset lock time is approximately 4 seconds.

[0104] Then, as shown in step S924, when the brake caliper 34 is in the locked state, if the micro control unit 80 detects that the throttle opening is greater than the preset opening, the micro control unit 80 controls the brake caliper 34 to switch from the locked state to the unlocked state to release the brake disc 1.

[0105] In addition, it should be particularly pointed out that in the above-mentioned first and second embodiments, although the electronic parking brake device 3 uses the motor 31 to drive the brake caliper 34 to lock the brake disc 1, in the variations of the above-mentioned first and second embodiments, the electronic parking brake device 3 can also be locked or unlocked by other means, for example, other means such as using a steel rope to replace the motor 31.

[0106] In summary, the advantages and effects of the control method of the vehicle electronic parking brake device of the present invention are as follows: (1) in the first embodiment, when the engine 6 is just started, if the user continues to press the brake lever 51 for a long time, the motor 31 of the electronic parking brake device 3 will not be locked, so the user can easily move the motorcycle manually, greatly improving the convenience of using the electronic parking brake (EPB) system; (2) in the second embodiment, when the engine 6 is just started, the user must continue to press the brake lever 51 for a long time (for example, more than 4 seconds) before the motor 31 of the electronic parking brake device 3 will automatically lock, thereby solving the problem disclosed in the aforementioned patent announcement No. 1773318 that the motorcycle will automatically lock if the user does not immediately release the brake lever within 2 seconds during the start-up process of the motorcycle, thereby improving the convenience of using the electronic parking brake system; therefore, the purpose of the present invention can be achieved.

[0107] The above descriptions are merely embodiments of the present invention and are not intended to limit the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the claims and description of the present invention are still within the scope of the present invention.

Claims

1. A control method for a vehicle electronic parking brake device, characterized in that: The invention is applicable to a motorcycle including an engine, an electronic parking brake device, an electronic parking brake controller, a brake lever and a brake lever switch, wherein the control method of the vehicle electronic parking brake device includes the following steps: (A) when the user starts the engine, the electronic parking brake controller captures the engine speed of the engine and stores the just captured engine speed as a temporary engine speed; (B) under the condition that the latest engine speed is within the engine starting speed range and the temporarily stored engine speed is within the engine stationary speed range, the electronic parking brake controller determines that the engine state is the engine just started state, and controls the brake caliper of the electronic parking brake device not to enter the locked state; (C) when the user releases the brake lever in the engine just-started state, the electronic parking brake controller determines that the engine state of the engine is changed to the engine-started state; and (D) When the user presses the brake lever again after the engine is started, the electronic parking brake controller determines that the time when the brake lever switch is turned on reaches a preset turn-on duration, and then the electronic parking brake controller controls the brake caliper of the electronic parking brake device to actuate and enter the locked state.

2. The control method of the vehicle electronic parking brake device according to claim 1, characterized in that: The motorcycle further comprises an engine control unit. In the step (A), the electronic parking brake controller acquires the engine speed from the engine control unit once every 10 milliseconds.

3. The control method of the vehicle electronic parking brake device according to claim 1, characterized in that: In the step (B), the engine starting speed range is about 900 rpm to 2500 rpm, and the engine stationary speed range is about 0 rpm to 900 rpm.

4. The control method of the vehicle electronic parking brake device according to claim 1, characterized in that: In the step (C), if the electronic parking brake controller times the closing time of the brake lever switch to reach a preset closing duration, the electronic parking brake controller determines that the engine state of the engine is changed to the engine start state to enter the engine start automatic parking mode.

5. The control method of the vehicle electronic parking brake device according to claim 4, characterized in that: In the step (C), the preset closing duration is about 100 milliseconds.

6. The control method of the vehicle electronic parking brake device according to claim 1, characterized in that: In the step (D), the preset on-time duration is about 2 seconds.

7. The control method of the vehicle electronic parking brake device according to claim 1, characterized in that: The motorcycle further comprises an automatic parking enable switch electrically connected to the electronic parking brake controller. In the step (A), the user starts the engine with the automatic parking enable switch turned on.

8. A method for controlling a vehicle electronic parking brake device, characterized in that: The invention is applicable to a motorcycle including an engine, an electronic parking brake device, an electronic parking brake controller and a brake lever, wherein the control method of the vehicle electronic parking brake device includes the following steps: (a) when the user starts the engine, the electronic parking brake controller captures the engine speed of the engine and stores the just captured engine speed as a temporary engine speed; (b) under the condition that the latest engine speed is within the engine starting speed range and the temporarily stored engine speed is within the engine stationary speed range, the electronic parking brake controller determines that the engine state is the engine just started state, controls the brake caliper of the electronic parking brake device not to enter the locked state, and starts counting an engine starting time; and (c) When the user continues to press the brake lever, if the electronic parking brake controller determines that the engine start time is greater than a preset locking time, the electronic parking brake controller controls the brake caliper of the electronic parking brake device to actuate and enter the locking state.

9. The control method of the vehicle electronic parking brake device according to claim 8, characterized in that: The motorcycle further comprises an engine control unit. In the step (a), the electronic parking brake controller acquires the engine speed from the engine control unit once every 10 milliseconds.

10. The control method of the vehicle electronic parking brake device according to claim 8, characterized in that: In the step (b), the engine starting speed range is about 900 rpm to 2500 rpm, and the engine stationary speed range is about 0 rpm to 900 rpm.

11. The control method of the vehicle electronic parking brake device according to claim 8, characterized in that: In the step (c), the preset locking time is about 4 seconds.

12. The control method of the vehicle electronic parking brake device according to claim 8, characterized in that: The motorcycle further comprises an automatic parking enable switch electrically connected to the electronic parking brake controller. In the step (a), the user starts the engine with the automatic parking enable switch turned on.

13. The control method of the vehicle electronic parking brake device according to claim 8, characterized in that: In the step (b), when the engine start time is greater than 2 seconds, the electronic parking brake controller enters the automatic parking mode after the engine starts.

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