WO2009074088A1

WO2009074088A1 - An automobile window anti-pinch system based on a lin bus

Info

Publication number: WO2009074088A1
Application number: PCT/CN2008/073273
Authority: WO
Inventors: Wei Jiang
Original assignee: Chery Automobile Co., Ltd.
Priority date: 2007-12-04
Filing date: 2008-12-01
Publication date: 2009-06-18
Also published as: CN101182748A; CN101182748B

Abstract

An automobile window anti-pinch system comprises an automobile body control module and an anti-pinch module which are connected through a LIN bus. Wherein, the automobile body control module is used for sending corresponding control command to the anti-pinch module through the LIN bus, as well as receiving the automobile window status information from the anti-pinch module. The anti-pinch module is used for indirectly controlling the movement of the automobile window through controlling the operation of a motor after having received the control command, as well as sending the automobile window status information to the automobile body control module through the LIN bus.

Description

Window anti-pinch system based on LI bus

This application claims priority to Chinese Patent Application No. 200710195895.9, entitled "A LIN-based Window Anti-Pinch System", filed on December 4, 2007, the entire contents of which are incorporated by reference. In this application.

Technical field

The invention relates to the field of automobile electric window anti-pinch technology and the field of vehicle bus LIN bus control technology, in particular to a window anti-pinch system based on LIN bus.

Background technique

At present, many vehicles in China have been equipped with electric windows, which are roughly divided into the following two types: One type of electric window has only manual up and down function, no anti-pinch function, no one-button centralized window-lifting function; another type of electric window has manual And automatic rise and fall function, anti-clip function, one-button centralized control window.

At present, most of the window anti-pinch modules that adopt anti-pinch electric window vehicles in China directly connect with traditional harnesses directly, and the interface block diagram is shown in Figure 1.

The disadvantage of this approach is that there are too many harnesses and the function is not easy to expand.

In addition, at present, there is a common safety hazard in the anti-pinch electric window, that is: when the vehicle is turned off, the owner uses the remote control to fortify, triggers a one-button centralized control window function, and if there is anti-pinch action during window lifting, the motor reverses. The control window is lowered and stopped. At this time, the window is not closed, but the door control module (BCM) is considered to be successful, resulting in a safety hazard.

Summary of the invention

The invention is improved on the basis of the original anti-pinch module, and adopts a control strategy based on the LIN bus.

The specific technical solutions are as follows.

The invention provides a window anti-pinch system based on a LIN bus, comprising: a body control module and an anti-pinch module, wherein the body control module and the anti-pinch module are connected by a LIN bus; wherein the body control module is used for passing LIN The bus sends a corresponding control command to the anti-pinch module; and is also configured to receive the window status information sent by the anti-pinch module;

The anti-pinch module is configured to indirectly control the movement of the window by controlling the operation of the motor after receiving the control command; and is further configured to send the window status information to the vehicle body control module through the LIN bus.

The anti-pinch module is further configured to: determine whether a anti-pinch action occurs during the ascent of the window, when the window When the anti-pinch action occurs during the ascent, the motor is reversed to lower the window; when the anti-pinch action does not occur during the window ascending, the motor is normally operated to raise the window to the top;

It is also used to carry the anti-pinch signal in the window state information.

The body control module is further configured to: when the anti-pinch signal identifies that the window has an anti-pinch action, if the anti-pinch action occurs for the first time during the rising of the sub-window, delaying a preset time to perform a control command Transmitting, and carrying the centralized window up signal in the control command; if the anti-pinch action occurs for the second time during the rising of the window, controlling the alarm device to perform an alarm;

Correspondingly, the system also includes an alarm device for alarming under the control of the body control module. The window status information further includes: a window motion status signal and/or a window position signal. The control command includes: one or more of a key position status signal, a glass lifting signal, and a centralized window raising signal.

The body control module is further configured to: generate the control command based on the window status information and/or the status of each local control switch and/or remote information on the CAN bus and/or an input signal to the remote control.

The system further includes:

a remote control device for transmitting the input signal to the vehicle body control module.

The anti-pinch module is further configured to: send a motor thermal protection signal, a motor voltage signal, and a motor failure signal to the vehicle body control module;

Correspondingly, the body control module is further configured to: convert the motor thermal protection signal, the motor voltage signal, and the motor fault signal into corresponding diagnostic fault codes and store them.

The window anti-pinch system provided by the invention circulates the signal transmission between the body control module and the anti-pinch module through the LIN bus, simplifies the network harness, reduces the cost, and improves the network communication efficiency and reliability.

Moreover, when the anti-pinch action occurs during the process of starting the one-key centralized control window for the window to rise, the anti-pinch module sends a corresponding signal to the body control module, and the body control module controls the anti-pinch module again after delaying for a certain period of time. The control of the window is raised, so that the window control rises successfully, or the user is alerted when the anti-pinch action occurs again, which eliminates the fact that the anti-pinch electric window in the prior art cannot truly realize the car after the anti-pinch action occurs. The safety hazard of window closing. DRAWINGS

1 is a schematic structural view of an interface of an anti-pinch module in the prior art;

2 is a schematic diagram of an interface structure of an anti-pinch module based on a LIN bus control;

Figure 3 is a schematic diagram of the LIN network structure composed of BCM and anti-pinch module.

detailed description

With the development of automotive technology and network communication technology, the network of automotive information communication is an inevitable trend. The diversification of automotive information communication has promoted the emergence and development of automotive hierarchical networks. LIN is a new low-speed serial bus with a simple structure, flexible configuration, and low cost. It is mainly used as an auxiliary network or sub-network for high-speed buses such as CAN. In the case of low bandwidth requirements, low functionality, and low real-time requirements, such as the control of body appliances, the use of the LIN bus can effectively simplify the network harness, reduce costs, and improve network communication efficiency and reliability. As a new type of automobile bus with excellent performance and low price, LIN will further promote the implementation and improvement of the automotive graded network structure and promote the development of automotive technology.

The schematic diagram of the interface structure of the anti-pinch module based on the LIN bus control in the present invention is shown in FIG. 2: The anti-pinch module realizes all functions only through the power supply, the ground, and the LIN three-wire, and is easy to expand the function.

As shown in Figure 3, the entire window control system connects the body control module (BCM) and the anti-pinch modules corresponding to each window through the LIN bus to form a LIN network. The BCM is the main node of the LIN network, and the anti-pinch module is Slave node of the LIN network.

After the BCM receives the switch input signal, the BCM periodically sends a key gear signal, a glass lift signal, a centralized window lift signal, etc. to the anti-pinch module through the LIN bus, and the anti-pinch module controls the motor to operate after receiving the corresponding signal, and Through the LIN bus, the BCM periodically sends signals such as the window motion status signal and the window position signal, as well as some fault diagnosis signals such as the motor thermal protection signal, the motor voltage signal, and the motor error signal.

The master node BCM collects the state of each local control switch and accepts the remote information on the CAN bus, generates a control command according to this, and converts the control command into a LIN message, and sends it to the corresponding slave node anti-pinch module through the LIN network, After receiving the LIN message related to itself, the node anti-pinch module unpacks and interprets the LIN message, and then controls the corresponding actuator action according to the obtained instruction, thereby realizing the control of the corresponding window. At the same time, when necessary, the slave node anti-clamp module respectively feeds back the state of the window controlled by the node to the master node BCM, and the master node BCM then processes the state information of the window to perform corresponding processing on each window. control. Hereinafter, the specific implementation manners of the LIN bus for realizing the window raising prevention function, the secondary automatic window raising function and the diagnosis function of the window control system of the present invention are respectively described in detail:

(1) Automatic riser with anti-pinch function:

When the auto-rising switch is triggered, the BCM receives a low-level input signal from the corresponding control switch, and converts the input signal into a LIN message, and the LIN message is cycled through the LIN bus in the form of a message. Sexually sent to the anti-pinch module, this frame message mainly contains the following signals: key position status signal, glass lifting signal, centralized control window signal, etc., as shown in Table 1:

Table 1

After the LIN message is received by the LIN transceiver of the anti-pinch module, the relevant signal is sent to the controller of the anti-pinch module, and the automatic window-up command is issued by the controller, thereby driving the motor to work and causing the window to rise. While the window is rising, the anti-pinch module also periodically sends the status information of the window to the BCM in the form of a LIN message. The LIN message sent to the BCM mainly includes the window motion status signal and the window position signal. , whether the signal such as anti-pinch signal, as shown in Table 2:

Table 2

After receiving the LIN message sent by the anti-pinch module through the LIN transceiver included in the BCM, the BCM unpacks and interprets the LIN message, and sends the obtained related signal to the controller included in the BCM to the anti-pinch module. Control accordingly.

If the window does not have anti-pinch action during the ascent, the window rises to the top normally. At this time, the contents of the LIN message sent by the anti-pinch module to the BCM are shown in Table 3: table 3

If the window has an anti-pinch action during the ascent, the controller of the anti-pinch module immediately drives the motor to reverse, causing the window to descend, and sends a LIN message containing the window status information to the BCM. At this time, the contents of the LIN message sent to the BCM are as shown in Table 4:

Table 4

After the window is lowered by 150mm, the motor stops working. At this time, the contents of the LIN message sent by the anti-pinch module to the BCM are shown in Table 5:

table 5

If after 4 seconds, the BCM does not receive any input signal to the control switch, the LIN bus automatically goes to sleep and stops sending and receiving any message on the LIN bus. The LIN bus is immediately woken up until the BCM receives the input signal to the control switch.

(2) The function of automatic double-lifting after one-button centralized control and lifting window anti-pinch:

When using the remote control for arming, the one-button centralized control window function is activated at the same time. At this time, the window is simultaneously controlled to rise. The BCM receives the input signal of the remote controller, activates the one-button centralized control window function, and sends the corresponding LIN message to the anti-pinch module. The contents of the LIN message are as shown in Table 6:

Table 6

After the anti-pinch module receives the LIN message sent by the BCM, the controller of the anti-pinch module drives the motor to realize the simultaneous rise and control of the window, and sends a LIN message containing the window status information to the BCM, and the anti-pinch module sends the message. The LIN message is shown in Table 7:

Table 7

If the window is controlled to rise, the anti-pinch action occurs. The anti-pinch module drives the motor to reverse and sends a LIN message to the BCM. At this time, the LIN message sent by the anti-pinch module carries the window down signal.

After the window is lowered by 150mm, the motor stops working. At this time, the information carried in the LIN message sent by the anti-pinch module to the BCM includes: The window is stopped, and the position of the window is uncertain.

After 2 seconds delay, BCM comprehensively judges the key position status signal, the centralized control rising signal and the anti-pinch signal, and automatically sends a LIN message containing the automatic window-up signal. After the anti-pinch module receives the LIN message, , Control motor to achieve secondary automatic window lifting function. If there is no anti-pinch during the second window lift, the centralized control rises successfully, and the LIN bus goes to sleep after 4 seconds. If the anti-pinch action still occurs during the second window lifting process, the anti-pinch module transmits the LIN message carrying the corresponding signal to the BCM while controlling the motor to reverse the driving window, and the BCM receives the carrying After the LIN 4 of the corresponding signal is processed, the anti-theft horn is driven to alert the owner. (3) Diagnostic function:

During the movement of the window, the anti-pinch module will perform self-diagnosis and send some diagnostic messages through the LIN bus. The diagnostic message includes the following signals: motor thermal protection signal, motor voltage signal, motor fault signal, etc. After receiving the diagnostic message from the anti-pinch module, the BCM converts the diagnostic message into a corresponding diagnostic trouble code and stores it in the EPROM. After connecting the diagnostic device, the fault information can be directly obtained.

Claims

Rights request

A window anti-pinch system based on a LIN bus, comprising: a body control module and an anti-pinch module, wherein the body control module and the anti-pinch module are connected by a LIN bus;

a body control module for transmitting a corresponding control command to the anti-pinch module via the LIN bus; and for receiving window status information sent by the anti-pinch module;

2. The system according to claim 1, wherein the anti-pinch module is further configured to: determine whether an anti-pinch action occurs during the rising of the window, and control the motor reversal when an anti-pinch action occurs during the rising of the window. In order to lower the window; when the anti-pinch action does not occur during the rise of the window, the motor is normally operated to raise the window to the top;

It is also used to carry the anti-pinch signal in the window state information.

The system according to claim 2, wherein the vehicle body control module is further configured to: when the anti-pinch signal identifies that the window has an anti-pinch action, if the anti-pinch action is the sub-window rise The first occurrence in the process, delaying the predetermined time to perform the transmission of the control command, and carrying the centralized window raising signal in the control command; if the anti-pinch action is the second time during the rising of the window When it occurs, the alarm device is controlled to perform an alarm;

Correspondingly, the system also includes an alarm device for alarming under the control of the body control module.

The system according to claim 2 or 3, wherein the window state information further comprises: a window motion state signal and/or a window position signal.

The system according to claim 1 or 2, wherein the control command comprises: one or more of a key position status signal, a glass lifting signal, and a centralized window raising signal.

The system according to any one of claims 1 to 3, wherein the vehicle body control module is further configured to:: according to the window state information and/or the state of each local control switch and/or on the CAN bus The input signal of the remote information and/or the remote control device generates the control command.

7. The system of claim 6 wherein the system further comprises: remote control means for transmitting the input signal to the body control module.

The system according to any one of claims 1 to 3, characterized in that the anti-pinch module is further The step is: sending a motor thermal protection signal, a motor voltage signal, a motor fault signal to the vehicle body control module; correspondingly, the body control module is further configured to: convert the motor thermal protection signal, the motor voltage signal, and the motor fault signal into corresponding Diagnose the fault code and store it.