A system and method for monitoring the timing of an epb automatic release when shifting from a p range to a d or r range

Abstract

The present application belongs to the technical field of vehicle control, and particularly relates to a P-out-to-D or R-gear EPB automatic release opportunity monitoring system and method; comprising a signal receiving module and an EPB automatic release monitoring module; wherein the signal receiving module is used for receiving vehicle gradient information, gear shifting mechanism fault state, braking system fault state, EPB electronic parking brake system fault state, vehicle power-on state, driver safety belt signal, driver side door signal, brake pedal signal, accelerator pedal signal and gear signal; the EPB automatic release monitoring module confirms whether to execute vehicle gear shifting and the time window of EPB release according to the signals received by the signal receiving module; the present application can ensure that the vehicle can smoothly complete the P-out gear without operating the EPB button, the vehicle automatically releases the EPB, and the vehicle starts; and the driving experience is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle control, and in particular relates to a system and method for monitoring the timing of automatic release of EPB when shifting from P gear to D or R gear. Background Art

[0002] Currently, with the popularization of EPB (electronic parking brake system), vehicles generally use the function of automatically releasing EPB when the gear shifts out of P. This function improves the driving experience and allows the driver to operate more smoothly and conveniently during driving.

[0003] However, in the actual process of rapid gear shifting, because the coordination of hands and feet is required, if the operation is too fast, it is often impossible to smoothly shift the gear from P, or after the gear shifts from P, the EPB cannot be automatically released smoothly.

[0004] The reason for these situations is that after the vehicle is ignited, the driver needs to step on the brake pedal first when starting the vehicle, and operate the shift handle when the brake pedal is stepped on. The shift controller will not change the gear from P gear to D gear or R gear until it detects that the brake pedal is currently stepped on and receives a shift request. The monitoring of the brake pedal at this time is to ensure that the vehicle does not appear to be in P gear and the vehicle does not slide forward or backward after it leaves P gear, causing an accident or causing panic to the driver. When the gear of the vehicle changes from P gear to D gear or R gear, the EPB controller receives the relevant gear change information and monitors that the brake pedal is stepped on at this time. Only then will the gear be released from P and the EPB will be automatically released. The monitoring of the brake pedal in this process is also to ensure This prevents the vehicle from suddenly releasing EPB when it is parked without EPB, causing the vehicle to slide forward or backward and cause an accident or panic to the driver; however, when the driver is very familiar with the operation of the vehicle, or the driver wants to start the vehicle quickly, during the steps of driver stepping on the brake pedal → driver operating the shift handle to shift gears → shift mechanism gear change completed → EPB automatically released → driver releasing the brake pedal → driver stepping on the accelerator to start, it is very easy for the driver to release the brake pedal and step on the accelerator to start before the operation is completed; this process is very likely to be interrupted because the driver has released the brake pedal before the shift mechanism shift is completed or before EPB is automatically released, and the driver cannot start smoothly, and the smooth operation feels stuck.

[0005] This problem is very common when the driver is very skilled in operating the vehicle, which makes the smooth start-up process lose its user experience. However, there is currently no method in the field that can solve or optimize this problem. Summary of the Invention

[0006] In order to overcome the above problems, the present invention provides a system and method for monitoring the timing of automatic release of EPB when shifting from P to D or R gear; ensuring that the vehicle can smoothly complete the shift from P gear to D or R gear without operating the EPB button, and the vehicle automatically releases EPB to complete the vehicle start; thereby improving the driving experience.

[0007] A system for monitoring the timing of automatic release of an electronic parking brake (EPB) when shifting from P to D or R gear comprises a signal receiving module and an EPB automatic release monitoring module; wherein the signal receiving module is used to receive vehicle slope information, a shift mechanism fault status, a brake system fault status, an EPB electronic parking brake system fault status, a vehicle power-on status, a driver's seat belt signal, a driver's side door signal, a brake pedal signal, an accelerator pedal signal and a gear position signal; and the EPB automatic release monitoring module determines whether to execute vehicle gear shifting and the time window for EPB release based on signals received by the signal receiving module.

[0008] A method for monitoring the timing of automatic EPB release when shifting from P to D or R gear includes the following:

[0009] Step 1: After the vehicle is powered on, the EPB automatic release timing monitoring system is turned on. The signal receiving module receives the vehicle power-on signal to confirm that the vehicle is powered on. Then, based on the current vehicle slope information, it is determined whether the vehicle slope exceeds the limit. If the slope exceeds the limit, the EPB automatic release monitoring module controls the EPB not to automatically release the EPB.

[0010] Step 2: The signal receiving module determines whether the driver is in the vehicle according to the received driver's seat belt signal and driver's side door signal. If the driver is not in the vehicle, the EPB automatic release monitoring module controls the EPB to not automatically release the EPB when the gear is out of position P.

[0011] If the signal receiving module determines that the driver is in the vehicle, it determines whether the brake pedal is depressed based on the received brake pedal signal. If the brake pedal is not depressed, the EPB automatic release monitoring module controls the shift mechanism not to perform the shift operation. If the brake pedal is depressed, and a shift signal is received within x seconds from the time the brake pedal is depressed to the time it is released, indicating that the driver has performed a shift operation, then as long as it is within x seconds, the EPB automatic release monitoring module controls the shift mechanism to perform the shift operation. If a shift signal is received more than x seconds after the driver has released the brake pedal, indicating that the driver has performed a shift operation, then the EPB automatic release monitoring module controls the shift mechanism not to perform the shift operation.

[0012] Step 3: When the vehicle gear has been shifted from P to D or R, and the shift controller has sent a gear signal, the signal receiving module confirms whether the vehicle's brake pedal is currently depressed based on the brake pedal signal after receiving the gear signal change. As long as the brake pedal is currently depressed or the time from being depressed to being released is within y seconds, the EPB automatic release monitoring module controls the EPB to automatically release the EPB.

[0013] Step 4: If, during the driver's execution, the signal receiving module receives the gear signal indicating that the vehicle's gear has not completed the shift from P gear to D gear or R gear, the EPB automatic release monitoring module controls the EPB not to perform the EPB automatic release operation;

[0014] Step 5: If the gear is changed from P to D or R, the signal receiving module determines that the time from the driver releasing the brake pedal has exceeded y seconds. Then, the accelerator pedal signal is used to monitor whether the driver has stepped on the accelerator pedal. If the driver has not stepped on the accelerator pedal, it is determined that the driver has no intention to start the vehicle immediately. The EPB automatic release monitoring module controls the EPB not to automatically release the EPB. If the driver steps on the accelerator pedal, and the time from the driver completing the gear change from P to D or R is within z seconds, and the time from the driver releasing the brake pedal is within n seconds, it is determined that the driver has the intention to start the vehicle. At this time, the EPB automatic release monitoring module controls the EPB to automatically release the EPB.

[0015] If the time from the driver pressing the accelerator pedal to the driver changing the vehicle gear from P to D or R exceeds z seconds, or the time from the driver releasing the brake pedal exceeds n seconds, then it is considered that the driver has no intention to start the vehicle. To ensure vehicle safety, the EPB automatic release monitoring module controls the EPB and does not perform the EPB automatic release operation.

[0016] In step 2, the signal receiving module determines whether the driver is in place by whether the driver's side door is closed and whether the driver has fastened his seat belt. If the driver's seat belt is connected and the driver's side door is closed, the driver is determined to be in place; if the driver's seat belt is not connected or the driver's side door is not closed, the driver is determined to be not in place.

[0017] The specific values ​​of x, y, z and n seconds depend on different vehicle models.

[0018] Beneficial effects of the present invention:

[0019] The present invention realizes the smoothness of automatically releasing EPB when the vehicle gear is shifted from P gear to D gear or R gear through a control strategy. By receiving vehicle information in the whole vehicle environment: vehicle slope information, current fault status of gear shift mechanism, fault status of braking system, fault status of EPB electronic parking brake system, vehicle power-on status, driver's seat belt signal, driver's side door signal, brake pedal signal, accelerator pedal signal and gear signal, logical operation is performed to confirm the time window for executing vehicle gear shifting and EPB release, ensuring that the vehicle can smoothly complete the gear shift from P gear without operating the EPB button, and the vehicle automatically releases EPB to complete vehicle starting, thereby improving the driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0021] Figure 1 Flow chart of the method of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0023] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0024] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0025] In the description of the present embodiment, the terms "on", "under", "left", "right" and the like orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in description and have no special meaning.

[0026] Embodiment 1

[0027] An EPB automatic release opportunity monitoring system for shifting from P to D or R gear, comprising a signal receiving module and an EPB automatic release monitoring module; wherein the signal receiving module is used to receive vehicle slope information, gear shifting mechanism fault state, brake system fault state, EPB electronic parking brake system fault state, vehicle power-on state, driver seat belt signal, driver side door signal, brake pedal signal, accelerator pedal signal and gear signal; the EPB automatic release monitoring module confirms whether to execute vehicle gear shifting and the time window of EPB release according to the signals received by the signal receiving module.

[0028] An EPB automatic release opportunity monitoring method for shifting from P to D or R gear, as shown in Figure 1 , comprising the following contents:

[0029] Step one, after the vehicle is powered on, the EPB automatic release opportunity monitoring system is started, the signal receiving module receives the vehicle power-on signal to confirm that the vehicle has been powered on, and then confirms whether the vehicle slope exceeds the limit value according to the current vehicle slope information. If the slope exceeds the limit value, it means that there is a risk of automatic release of EPB vehicle coasting out of control, and the EPB automatic release monitoring module controls the EPB not to perform the function of automatic release of EPB;

[0030] Step two, the signal receiving module judges whether the driver is in place according to the received driver seat belt signal and driver side door signal. If it is determined that the driver is not in place, then the EPB automatic release monitoring module controls the EPB not to perform the function of automatic release of EPB for gear P;

[0031] If the signal receiving module determines that the driver is in position, it will determine whether the brake pedal is depressed based on the received brake pedal signal. If the brake pedal is not depressed, the EPB automatic release monitoring module will control the shift mechanism not to perform the shift operation; if the brake pedal is depressed, and a shift signal is received within x seconds from the time the brake pedal is depressed to the time it is released, indicating that the driver has performed a shift operation, then as long as it is within x seconds, the EPB automatic release monitoring module will control the shift mechanism to perform the shift operation; if the shift signal is received more than x seconds after the driver releases the brake pedal, indicating that the driver has performed a shift operation, then the EPB automatic release monitoring module will control the shift mechanism not to perform the shift operation; the x-second time window here is set to prevent the driver from releasing the brake pedal too quickly, resulting in the gear shift operation being unable to proceed smoothly.

[0032] Step three, when the vehicle gear has been changed from P gear to D gear or R gear, and the gear shift controller has sent the gear signal, the signal receiving module confirms whether the brake pedal of the current vehicle is depressed based on the brake pedal signal after receiving the gear signal change. As long as the brake pedal is being depressed at this time or the time from the brake pedal being depressed to being released is within y seconds, the EPB automatic release monitoring module controls the EPB to automatically release the EPB. This y-second time window is set to avoid the driver releasing the brake pedal during the period when the driver operates the gear shift mechanism, the gear shift mechanism performs the gear shift operation, the gear status is identified after the gear is successfully converted, and the current gear status is sent to the control system, resulting in the EPB failing to automatically release the brake pedal as the driver wishes.

[0033] Step 4: If, during the driver's execution, the signal receiving module receives the gear signal indicating that the vehicle's gear has not completed the shift from P gear to D gear or R gear, the EPB automatic release monitoring module controls the EPB not to perform the EPB automatic release operation;

[0034] Step 5: If the gear is changed from P to D or R, the signal receiving module determines that the time from the driver releasing the brake pedal has exceeded y seconds. Then, the accelerator pedal signal is used to monitor whether the driver has stepped on the accelerator pedal. If the driver has not stepped on the accelerator pedal, it is determined that the driver has no intention to start the vehicle immediately. The EPB automatic release monitoring module controls the EPB not to automatically release the EPB. If the driver steps on the accelerator pedal, and the time from the driver completing the gear change from P to D or R is within z seconds, and the time from the driver releasing the brake pedal is within n seconds, it is determined that the driver has the intention to start the vehicle. At this time, the EPB automatic release monitoring module controls the EPB to automatically release the EPB.

[0035] If the time from the driver pressing the accelerator pedal to the driver changing the vehicle gear from P to D or R exceeds z seconds, or the time from the driver releasing the brake pedal exceeds n seconds, then it is considered that the driver has no intention to start the vehicle. To ensure vehicle safety, the EPB automatic release monitoring module controls the EPB and does not perform the EPB automatic release operation.

[0036] In step 2, the signal receiving module determines whether the driver is in place by whether the driver's side door is closed and whether the driver has fastened his seat belt. If the driver's seat belt is connected and the driver's side door is closed, the driver is determined to be in place; if the driver's seat belt is not connected or the driver's side door is not closed, the driver is determined to be not in place.

[0037] Example 2

[0038] The specific scheme of the monitoring strategy for the automatic release timing of the EPB when the vehicle gear is shifted from P gear to D gear or R gear adopted by the present invention is described as follows:

[0039] The EPB automatic release timing monitoring system after the gear is out of P will receive the current vehicle slope information, which is usually calculated through the vehicle's acceleration sensor; receive the current fault status of the shift mechanism, the fault status of the braking system, and the fault status of the EPB electronic parking brake system. When there is a fault, EPB will not be released; receive the vehicle's power-on status, the driver's seat belt signal, the driver's side door signal, the brake pedal signal, the accelerator pedal signal, and the gear position signal; perform logical judgment based on the received signals to confirm the time window for executing vehicle gear shifting and EPB release.

[0040] The execution logic of specific functions is as follows Figure 1 As shown:

[0041] The function is activated when the vehicle is powered on and has the driving function. First, it checks whether the current slope of the vehicle exceeds the limit. If the slope is too steep, there is a risk of automatic EPB release and the vehicle will roll out of control, and the automatic EPB release function will not be executed. Next, it determines whether the driver is in the seat, by checking whether the driver's side door is closed and the driver is wearing the seat belt. If the seat belt is not connected or the door is not closed, the automatic EPB release function will not be executed when the gear shift is out of P.

[0042] If the driver is in place, but not stepped on the brake pedal, the shift operation will not be performed; if the driver steps on the brake pedal, and within x seconds after the brake pedal is stepped on and released, the shift operation is performed, the vehicle will perform the shift operation within x seconds; if the driver releases the brake pedal after x seconds, then the shift mechanism will not perform the shift operation; here, the x second time window is set to avoid the driver releasing the brake pedal too quickly, resulting in the shift operation cannot be smoothly performed.

[0043] When the gear of the vehicle has been changed from P to D or R, and the shift controller has sent the gear signal, the system confirms whether the brake pedal of the current vehicle is stepped on after receiving the gear signal change, as long as the pedal is being stepped on or the time length from stepping on to releasing the pedal is within y seconds, the automatic release of the EPB operation can be performed; this y second time window is set to avoid the driver releasing the brake pedal during the driver operating the shift mechanism, the shift mechanism performing the shift operation, the gear state being recognized after the gear is successfully converted, and the current gear state being sent to the control system.

[0044] If the gear of the vehicle fails to complete the conversion from P to D or R during the execution process, the EPB automatic release operation will not be performed.

[0045] If the gear is changed from P to D or R, and the time length from the driver releasing the brake pedal has exceeded y seconds, then the driver is monitored whether the accelerator pedal is stepped on, if the driver does not step on the accelerator pedal, then according to the current situation, it is considered that the driver does not have the intention to start immediately, and the EPB will not be automatically released; if the driver steps on the accelerator pedal at this time, and the time from the driver completing the gear change of the vehicle from P to D or R is within z seconds, and the time from the driver releasing the brake pedal is within n seconds, then it is considered that the driver has the intention to start the vehicle, and the EPB automatic release operation is performed at this time; if the driver steps on the accelerator pedal, and the time from the driver completing the gear change of the vehicle from P to D or R has exceeded z seconds, or the time from the driver releasing the brake pedal has exceeded n seconds, then it is considered that the driver does not have the intention to start the vehicle, and the EPB automatic release operation will not be performed to ensure the safety of the vehicle.

[0046] The preferred embodiments of the present application are described in detail above with reference to the accompanying drawings, but the protection scope of the present application is not limited to the specific details in the above embodiments, and any person skilled in the art can make equivalent replacements or changes to the technical solutions and the inventive concept of the present application within the technical scope disclosed by the present application, which are all within the protection scope of the present application.

[0047] It should be further noted that any technically feasible combination of the various technical features described in the above embodiments is possible, provided that there is no contradiction, and the disclosure of the present application shall be deemed to include all such technically feasible combinations.

[0048] Furthermore, any combination of the various embodiments of the present application is possible, provided that there is no contradiction, and the disclosure of the present application shall be deemed to include all such technically feasible combinations.

Claims

1. A method for monitoring the timing of automatic EPB release when shifting from P to D or R, characterized in that: The method is implemented by using an EPB automatic release timing monitoring system for shifting from P to D or R gear, the monitoring system comprising a signal receiving module and an EPB automatic release monitoring module; wherein the signal receiving module is used to receive vehicle slope information, a shift mechanism fault status, a brake system fault status, an EPB electronic parking brake system fault status, a vehicle power-on status, a driver's seat belt signal, a driver's side door signal, a brake pedal signal, an accelerator pedal signal, and a gear position signal; and the EPB automatic release monitoring module determines whether to execute vehicle gear shifting and a time window for EPB release based on signals received by the signal receiving module; Monitoring methods include the following: Step 1: After the vehicle is powered on, the EPB automatic release timing monitoring system is turned on. The signal receiving module receives the vehicle power-on signal to confirm that the vehicle is powered on. Then, based on the current vehicle slope information, it is determined whether the vehicle slope exceeds the limit. If the slope exceeds the limit, the EPB automatic release monitoring module controls the EPB not to automatically release the EPB. Step 2: The signal receiving module determines whether the driver is in the vehicle according to the received driver's seat belt signal and driver's side door signal. If the driver is not in the vehicle, the EPB automatic release monitoring module controls the EPB to not automatically release the EPB when the gear is out of position P. If the signal receiving module determines that the driver is in the vehicle, it determines whether the brake pedal is depressed based on the received brake pedal signal. If the brake pedal is not depressed, the EPB automatic release monitoring module controls the shift mechanism not to perform the shift operation. If the brake pedal is depressed, and a shift signal is received within x seconds from the time the brake pedal is depressed to the time it is released, indicating that the driver has performed the shift operation, then as long as it is within x seconds, the EPB automatic release monitoring module controls the shift mechanism to perform the shift operation. If the signal receiving module receives a shift signal indicating that the driver has performed the shift operation more than x seconds after the driver has released the brake pedal, then the EPB automatic release monitoring module controls the shift mechanism not to perform the shift operation. Step 3: When the vehicle gear has been shifted from P to D or R, and the shift controller has sent a gear signal, the signal receiving module confirms whether the vehicle's brake pedal is currently depressed based on the brake pedal signal after receiving the gear signal change. As long as the brake pedal is currently depressed or the time from being depressed to being released is within y seconds, the EPB automatic release monitoring module controls the EPB to automatically release the EPB. Step 4: If, during the driver's execution, the signal receiving module receives the gear signal indicating that the vehicle's gear has not completed the shift from P gear to D gear or R gear, the EPB automatic release monitoring module controls the EPB not to perform the EPB automatic release operation; Step 5: If the gear is changed from P to D or R, the signal receiving module determines that the time from the driver releasing the brake pedal has exceeded y seconds. Then, the accelerator pedal signal is used to monitor whether the driver has stepped on the accelerator pedal. If the driver has not stepped on the accelerator pedal, it is determined that the driver has no intention to start the vehicle immediately. The EPB automatic release monitoring module controls the EPB not to automatically release the EPB. If the driver steps on the accelerator pedal, and the time from the driver completing the gear change from P to D or R is within z seconds, and the time from the driver releasing the brake pedal is within n seconds, it is determined that the driver has the intention to start the vehicle. At this time, the EPB automatic release monitoring module controls the EPB to automatically release the EPB. If the time from the driver pressing the accelerator pedal to the driver changing the vehicle gear from P to D or R exceeds z seconds, or the time from the driver releasing the brake pedal exceeds n seconds, then it is considered that the driver has no intention to start the vehicle. To ensure vehicle safety, the EPB automatic release monitoring module controls the EPB and does not perform the EPB automatic release operation.

2. The method for monitoring the timing of automatic EPB release when shifting from P to D or R according to claim 1, characterized in that: In step 2, the signal receiving module determines whether the driver is in place by whether the driver's side door is closed and whether the driver has fastened his seat belt. If the driver's seat belt is connected and the driver's side door is closed, the driver is determined to be in place; if the driver's seat belt is not connected or the driver's side door is not closed, the driver is determined to be not in place.

3. The method for monitoring the timing of automatic EPB release when shifting from P to D or R according to claim 1, characterized in that: The specific values ​​of x, y, z and n seconds depend on different vehicle models.

4. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for monitoring the timing of automatic release of EPB when shifting from P to D or R gear as described in any one of claims 1 to 3 is implemented.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method for monitoring the timing of automatic release of EPB when shifting from P gear to D or R gear as described in any one of claims 1 to 3 is implemented.

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