阅读说明：本技术 一种车辆电动尾门的开启方法 (Opening method of electric tail gate of vehicle ) 是由 刘爱民 张学超 陈忠桥 相彬彬 陈飞 李建才 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种电动尾门的开启方法,包括如下步骤：步骤1：通过PEPS模块驱动安装在车辆后保险杠内的低频天线周期性的产生搜索钥匙的低频信号,探测车辆周围是否存在合法钥匙；步骤2：实时获取合法钥匙与车辆的实时距离；步骤3：根据实时距离的变化判断合法钥匙是否处于靠近车辆的运动状态；步骤4：当钥匙处于靠近车辆的运动状态并且检测到车辆与合法钥匙之间的实时距离小于设定距离的持续时间达到预设时间阈值时,此时进入尾门打开步骤,PEPS模块控制电动尾门系统打开尾门。本发明基于现有的无钥匙系统硬件以及车辆硬件通过软件控制策略的优化,可以做到感应开启电动尾门,无硬件成本的增加,实现成本低,可以提升车辆竞争力。(The invention discloses an opening method of an electric tail gate, which comprises the following steps: step 1: the PEPS module drives a low-frequency antenna installed in a rear bumper of the vehicle to periodically generate a low-frequency signal for searching for a key, and whether a legal key exists around the vehicle is detected; step 2: acquiring the real-time distance between a legal key and a vehicle in real time; and step 3: judging whether the legal key is in a motion state close to the vehicle or not according to the change of the real-time distance; and 4, step 4: when the key is in a motion state close to the vehicle and the duration time that the real-time distance between the vehicle and the legal key is detected to be smaller than the set distance reaches a preset time threshold value, the tail gate opening step is started, and the PEPS module controls the electric tail gate system to open the tail gate. The invention can realize the induction opening of the electric tail gate based on the existing keyless system hardware and the optimization of vehicle hardware through a software control strategy, has no increase of hardware cost, realizes low cost and can improve the vehicle competitiveness.)

1. A method for opening a vehicle electric tail gate is characterized in that: the method comprises the following steps:

step 1: the PEPS module drives a low-frequency antenna installed in a rear bumper of the vehicle to periodically generate a low-frequency signal for searching for a key, and whether a legal key exists around the vehicle is detected;

step 2: acquiring the real-time distance between a legal key and a vehicle in real time;

and step 3: judging whether the legal key is in a motion state close to the vehicle or not according to the change of the real-time distance;

and 4, step 4: when the key is in a motion state close to the vehicle and the duration time that the real-time distance between the vehicle and the legal key is detected to be smaller than the set distance reaches a preset time threshold value, the tail gate opening step is started, and the PEPS module controls the electric tail gate system to open the tail gate.

2. A method of opening a power tailgate for a vehicle, as claimed in claim 1, wherein: in step 4, after entering the tail gate opening step, the PEPS wakes up the CAN network of the vehicle and sends a signal to the BCM to enable the BCM to send a door opening early warning signal, and detects the distance change between the legal key and the vehicle in real time, and when the door opening early warning signal is sent and the distance between the legal key and the vehicle is increased within the set time, the PEPS module sends a tail gate opening instruction to the PLG module through the CAN bus.

3. A method of opening a power tailgate for a vehicle, as claimed in claim 2, characterized in that: the PEPS module sends a tail door opening instruction to the PLG module and sends an instruction to the BCM module to shield the vehicle body anti-theft alarm when the tail door is opened.

4. A method of opening a power tailgate for a vehicle, as claimed in claim 2, characterized in that: in step 4, the BCM sends out a door opening early warning signal by controlling the car lamp and/or the buzzer.

5. The opening method of a power tailgate for a vehicle, according to claim 4, characterized in that: the car light is left indicator and/or right indicator, and the BCM module controls the indicator to flicker.

6. A method of opening a power tailgate for a vehicle, according to claim 1 or 2, characterized in that: in step 1, the PEPS first drives the low-frequency antenna to send a short message to search for a key, and if the key is found, the PEPS module drives the detection antenna to send a complete wireless signal for verifying the identity of the key to verify whether the key is a legal key.

7. A method of opening a power tailgate for a vehicle, according to claim 1 or 2, characterized in that: when the key enters the communication range of the low-frequency antenna, the key detects the intensity of a periodic signal generated by the current low-frequency antenna and feeds the signal intensity back to the PEPS module, and the PEPS module judges the real-time distance between the key and the vehicle according to the fed-back signal intensity signal.

Technical Field

The invention relates to the field of vehicle door opening control, in particular to a method for opening an electric tail gate in an induction mode based on a vehicle key.

Background

The automobile keyless system is used as a configuration for providing comfortable use experience for users, and the current configuration rate gradually reaches the standard configuration condition. When a customer carries a key and operates a button or an induction area on a handle, after the actions are detected by the PEPS module, the PEPS module drives a low-frequency antenna on the vehicle to generate a wireless signal to search the key, verifies the legality of an obtained key RF signal, and then sends a command to the BCM module to lock and unlock the whole vehicle.

In recent years, the share of medium and large SUVs in the domestic automobile market is getting larger, and as the backup door of the SUV is larger and is also very heavy, the opening and closing of the back door are very inconvenient, especially for female users. In order to facilitate the opening of the back door, the mounting of a power tailgate system (PLG) and a kick sensor (kick sensor) is also one of the arrangements in the fashion trend. When a user holds heavy objects with two hands, the user only needs to use feet to aim at the position of the sensor to perform kicking action, so that the tail gate can be opened, and the tail gate is very convenient, fast and practical. However, the kick sensor increases the cost of the whole vehicle and reduces the competitiveness of the vehicle. Meanwhile, the kick sensor has the problem of certain induction failure in certain scenes, so that the use is influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an opening method of an electric tail gate, which is used for realizing the automatic induction type opening of the electric tail gate.

In order to achieve the purpose, the invention adopts the technical scheme that: a method for opening a power tail gate comprises the following steps:

step 1: the PEPS module drives a low-frequency antenna installed in a rear bumper of the vehicle to periodically generate a low-frequency signal for searching for a key, and whether a legal key exists around the vehicle is detected;

step 2: acquiring the real-time distance between a legal key and a vehicle in real time;

and step 3: judging whether the legal key is in a motion state close to the vehicle or not according to the change of the real-time distance;

and 4, step 4: when the key is in a motion state close to the vehicle and the duration time that the real-time distance between the vehicle and the legal key is detected to be smaller than the set distance reaches a preset time threshold value, the tail gate opening step is started, and the PEPS module controls the electric tail gate system to open the tail gate.

In step 4, after entering the tail gate opening step, the PEPS wakes up the CAN network of the vehicle and sends a signal to the BCM to enable the BCM to send a door opening early warning signal, and detects the distance change between the legal key and the vehicle in real time, and when the door opening early warning signal is sent and the distance between the legal key and the vehicle is increased within the set time, the PEPS module sends a tail gate opening instruction to the PLG module through the CAN bus.

The PEPS module sends a tail door opening instruction to the PLG module and sends an instruction to the BCM module to shield the vehicle body anti-theft alarm when the tail door is opened.

In step 4, the BCM sends out a door opening early warning signal by controlling the car lamp and/or the buzzer.

The car light is left indicator and/or right indicator, and the BCM module controls the indicator to flicker.

In step 1, the PEPS first drives the low-frequency antenna to send a short message to search for a key, and if a legal key is found, the PEPS module drives the detection antenna to send a complete wireless signal for verifying the identity of the key to verify whether the key is a legal key.

When the key enters the communication range of the low-frequency antenna, the key detects the intensity of a periodic signal generated by the current low-frequency antenna and feeds the signal intensity back to the PEPS module, and the PEPS module judges the real-time distance between the key and the vehicle according to the fed-back signal intensity signal.

The invention has the advantages that: based on the existing keyless system hardware and the optimization of vehicle hardware through a software control strategy, the electric tail gate can be opened in an induction mode, the hardware cost is not increased, the implementation cost is low, and the vehicle competitiveness can be improved; the opening control logic of the electric tail gate is reasonable, the induction type opening of the electric tail gate can be accurately realized by opening, both hands can be liberated, and the use is more convenient; during the tail-gate that sets up opens control logic, need retreat one step when opening early warning signal and just can open the tail-gate, further can accomplish and prevent the maloperation function, touch the user when avoiding the tail-gate to open simultaneously, it is more reasonable.

Drawings

The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:

FIG. 1 is a hardware schematic of the present invention.

Detailed Description

The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.

As shown in fig. 1, the hardware schematic diagram of the electric tailgate opening method according to the present application includes a PEPS module, a smart key, a vehicle CAN network bus disposed on a low frequency antenna, an RF antenna, a PLG, a BCM, and a vehicle for module communication. The opening method of the electric tail gate based on the hardware comprises the following steps:

step 1: the PEPS module drives a low-frequency antenna installed in a rear bumper of the vehicle to periodically generate a low-frequency signal for searching for a key, and whether a legal key exists around the vehicle is detected; the PEPS drives the low-frequency antenna to send a short message to search for the key, and if the legal key is found, the PEPS module drives the detection antenna to send a complete wireless signal for verifying the identity of the key so as to verify whether the key is the legal key.

Step 2: acquiring the real-time distance between a legal key and the tail of the vehicle in real time; when the key enters the communication range of the low-frequency antenna, the key detects the intensity of a periodic signal generated by the current low-frequency antenna and feeds the signal intensity back to the PEPS module, and the PEPS module judges the real-time distance between the key and the tail of the vehicle according to the fed signal intensity signal.

And step 3: judging whether the legal key is in a motion state close to the vehicle or not according to the change of the real-time distance; and analyzing the change trend of the real-time distance, and judging the motion state of the approaching vehicle if the distance is reduced, or else, judging the motion state of the approaching vehicle not.

And 4, step 4: when the key is in a motion state close to the vehicle and the duration time that the real-time distance between the tail of the vehicle and the legal key is detected to be smaller than the set distance S reaches a preset time threshold t, the tail door opening step is started, and the PEPS module controls the electric tail door system to open the tail door. The set distance S and the preset time threshold T can be used for verifying the optimal distance and the optimal duration T according to vehicle tests, when a user brings a key close to the tail of the vehicle, the distance is reduced in real time, when the distance is smaller than the set distance S, the duration is calculated, and when the duration reaches the time threshold T, the step of opening the tail gate is carried out.

In step 4, after entering the tail gate opening step, the PEPS may firstly wake up the CAN network of the vehicle and send a signal to the BCM to make the BCM send out a door opening early warning signal, and detect a distance change between a legal key and the vehicle in real time, where the door opening early warning information includes signals of the vehicle and the like and an alarm signal. After the door opening early warning information is sent out, when the distance between a legal key and the vehicle is increased within the set time T1, the PEPS module sends a tail door opening instruction to the PLG module through the CAN bus. The PEPS module sends a tail gate opening instruction to the PLG module and sends an instruction to the BCM module to shield the vehicle body anti-theft alarm when the tail gate is opened. After entering the opening step, the back door is about to be opened at the moment, a signal is given to remind the user, the user retreats one step after reminding, namely the distance between the key and the tail part of the vehicle is increased, the user knows the door opening signal at the moment, the vehicle door can be opened at the moment, and the PEPS outputs a signal to the PLG to control the back door to be opened. If the distance is unchanged or reduced after the light early warning signal is sent, the user does not go backwards at the moment, which indicates that the user does not prepare to open the vehicle door (and the user cannot open the vehicle door at the tail of the vehicle because the user may collide with the user).

The BCM sends out door opening early warning signals by controlling the car lamps and/or the buzzer. The car light is left indicator and/or right indicator, and BCM module control indicator scintillation sends alarm flashing signal, and BCM control bee calling organ sends alarm signal and gives the warning.

The intelligent search and key location technology of the sufficient automobile keyless system realizes the function of opening the electric tail gate by induction under the condition of not increasing the cost. The specific implementation mode is as follows: the PEPS module drives a low-frequency antenna installed at the tail of the vehicle to periodically generate a low-frequency signal for searching for the key, and detects whether a legal key appears around the vehicle. In order to reduce the static current of the vehicle, the PEPS module firstly drives the low-frequency antenna to send a short message to search for a legal key, and if the legal key is found, the PEPS module drives the detection antenna to send a complete wireless signal for verifying the identity of the key.

And a low-frequency antenna installed in the rear bumper of the vehicle and periodically driven by the PEPS module to generate a key searching signal. A user carries an intelligent key to lean against a vehicle from the direction of a trunk, the PEPS module wakes up a CAN network of the vehicle when detecting that a legal key and the vehicle maintain a certain distance within a period of time through a key positioning technology, and sends a network signal to the BCM to control the left and right steering lamps of the vehicle to flicker. At this time, the user, after observing the indication of the vehicle light, retreats for a certain distance within a predetermined time. The PEPS module is positioned to the position that the distance between the intelligent key and the vehicle is changed, the fact that the user wants to open the trunk is evaluated through a software strategy, at the moment, the PEPS module sends a tail door opening instruction to the PLG module, and the PLG module drives the electric tail door to be opened.

And a low-frequency antenna installed in a rear bumper of the vehicle and used for periodically detecting keys approaching from the rear of the vehicle. When a user carries the intelligent key to lean into the vehicle from the direction of the trunk, the key can detect the intensity of the periodic signal generated by the low-frequency antenna at the current position and feed the signal intensity back to the PEPS module through high frequency. The PEPS module can determine the real-time distance of the key from the vehicle from this intensity value.

When the PEPS module detects that a legal key and the vehicle maintain a certain distance within a period of time, the PEPS module wakes up a CAN network of the vehicle and sends a network signal to the BCM to control the left and right steering lamps of the vehicle to flash and the buzzer to sound, so that a user CAN sense that the vehicle enters a tail gate opening area in a visual and auditory mode.

At the moment, the user retreats for a certain distance within a specified time, and the PEPS module receives the signal intensity fed back by the key and performs side summation, so that the distance between the intelligent key and the vehicle is positioned to be changed. The software strategy evaluates that a user executes the action of opening the trunk by induction, at the moment, the PEPS sends an instruction to the BCM through the CAN bus to shield the automobile body anti-theft alarm when the tail door is opened, and simultaneously sends a tail door opening instruction to the PLG module, and the PLG module drives the electric tail door to open.

The scheme has the advantages that:

1. the keyless system based on the vehicle realizes the function of opening the electric tail gate by induction through software strategy optimization, does not increase hardware cost, and improves vehicle competitiveness;

2. the electric tail gate is opened in an induction manner by positioning the key position, so that both hands of a user are liberated, and the electric tail gate is more convenient to use;

3. when the system works, the user needs to retreat one step in a specific scene, the function of preventing misoperation can be achieved, meanwhile, the user is prevented from being touched when the tail gate is opened, and the system is more reasonable.

It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.