CN108749747B - Signal transmission system of vehicle - Google Patents
Signal transmission system of vehicle Download PDFInfo
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- CN108749747B CN108749747B CN201810724067.8A CN201810724067A CN108749747B CN 108749747 B CN108749747 B CN 108749747B CN 201810724067 A CN201810724067 A CN 201810724067A CN 108749747 B CN108749747 B CN 108749747B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention provides a signal transmission system of a vehicle, which belongs to the technical field of vehicles and comprises: gateway, meter, first bus and second bus; the gateway comprises a first bus interface and a second bus interface; the instrument comprises a bus interface and a hard wire interface, wherein the hard wire interface is an interface used for being connected with the mechanical transfer case so as to receive a driving state signal of the mechanical transfer case; the first bus is used for connecting the gateway and the instrument, one end of the first bus is connected with a first bus interface of the gateway, and the other end of the first bus is connected with a bus interface of the instrument; the second bus comprises at least three connecting ends, wherein one connecting end is a connecting end used for being connected with the electronic transfer case, one connecting end is connected with a second bus interface of the gateway, and the other connecting ends are respectively connected with an electronic control module for receiving driving state signals of the electronic transfer case or the mechanical transfer case. The signal transmission system is suitable for vehicles using mechanical transfer cases and vehicles in which the mechanical transfer cases are replaced by electronic transfer cases.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a signal transmission system of a vehicle.
Background
The transfer case for vehicle is a gear transmission system fixed on the frame separately, its input shaft is connected with the output shaft of the speed variator by means of universal driving device, and its output shaft has several output shafts, and is respectively connected with all driving axles by means of universal driving device so as to distribute the power output by speed variator to all driving axles.
At present, the mechanical transfer case is mainly used for mass production and vehicle type production, but with the development of electronic control technology, the electronic transfer case gradually replaces the traditional mechanical transfer case, and network signal transmission is carried out through a bus to realize control.
In the whole vehicle system, the control logic of the electronic control module, such as an engine control system (EMS), an electronic stability system (ESP) of the vehicle body, an automatic Transmission Control Module (TCM) of the vehicle, etc., in different driving states (including two-wheel drive and four-wheel drive) is different, so that it is necessary to receive a driving state signal of the transfer case, and then perform different logic control according to the driving state signal. Therefore, in the existing vehicle model, the mechanical transfer case is replaced by the electronic transfer case, which involves modification of the electronic control module, and any modification of the electronic control module that needs to interact with each other to implement the control function requires a relatively large cost and a relatively long development period. In addition, the hardware structure and related software for signal transmission also need to be changed in time and cost.
Disclosure of Invention
In view of the above, the present invention provides a signal transmission system for a vehicle, so as to solve the problem that the existing signal transmission system needs to spend a lot of cost and time to change the hardware structure and software of the vehicle when replacing the mechanical transfer case with the electronic transfer case.
In order to solve the above technical problems, the present invention provides a signal transmission system of a vehicle, including:
gateway, meter, first bus and second bus;
the gateway comprises a first bus interface and a second bus interface;
the instrument comprises a bus interface and a hard wire interface, wherein the hard wire interface is an interface used for being connected with a mechanical transfer case so as to receive a driving state signal of the mechanical transfer case;
the first bus is used for connecting the gateway and the instrument, one end of the first bus is connected with a first bus interface of the gateway, and the other end of the first bus is connected with a bus interface of the instrument;
the second bus comprises at least three connecting ends, wherein one connecting end is a connecting end used for being connected with the electronic transfer case, one connecting end is connected with the second bus interface of the gateway, and the other connecting ends are respectively connected with an electronic control module for receiving driving state signals of the electronic transfer case or the mechanical transfer case.
Preferably, the meter is configured to transmit the driving status signal of the mechanical transfer case received by the meter to the gateway through the first bus;
the gateway is used for receiving the driving state signal of the mechanical transfer case transmitted by the instrument through the first bus and transmitting the driving state signal to the electronic control module through the second bus;
the second bus is also used for transmitting the driving state signal of the electronic transfer case to the electronic control module.
Preferably, the electronic control module comprises at least one of the following three: an engine control system, a body electronic stabilization system and an automatic gearbox control module of an automobile.
Preferably, the system further comprises a first hard wire and a second hard wire, wherein one end of each of the first hard wire and the second hard wire is connected with a hard wire interface of the instrument, and the other end of each of the first hard wire and the second hard wire is used for being connected with the mechanical transfer case;
the instrument is used for judging that the driving state signal of the mechanical transfer case is a four-drive high-speed state signal when the first hard wire has a low-level signal and the second hard wire is in a suspended state; when a low-level signal exists on the second hard wire and the first hard wire is in a suspended state, judging that a driving state signal of the mechanical transfer case is a four-drive low-speed state signal; when the first hard wire and the second hard wire are in a suspended state, judging that a driving state signal of the mechanical transfer case is a two-drive state signal; and when the first hard wire and the second hard wire are both provided with low-level signals, judging that the driving state signal of the mechanical transfer case is an abnormal state signal.
Preferably, the meter is configured to display the driving status signal of the mechanical transfer case received by the meter.
Preferably, the meter comprises a first indicator light and a second indicator light;
the driving state signals of the mechanical transfer case comprise four-drive high-speed state signals, four-drive low-speed state signals, two-drive state signals and abnormal state signals;
the first indicator lamp is used for being turned on when the driving state signal of the mechanical transfer case is a four-drive high-speed state signal, turned off when the driving state signal of the mechanical transfer case is a four-drive low-speed state signal or a two-drive state signal, and flashing or turning on when the driving state signal of the mechanical transfer case is an abnormal state signal;
the second indicator lamp is used for being turned on when the driving state signal of the mechanical transfer case is a four-drive low-speed state signal, turned off when the driving state signal is a four-drive high-speed state signal or a two-drive state signal, and flashing or turning on when the driving state signal is an abnormal state signal.
Preferably, the electronic transfer case comprises an electronic transfer case controller for sending out a driving state signal, a first display signal and a second display signal of the electronic transfer case; the gateway is used for receiving the first display signal and/or the second display signal transmitted from the second bus and transmitting the first display signal and/or the second display signal to the instrument through the first bus; the instrument is used for receiving the first display signal and/or the second display signal from the first bus and correspondingly displaying according to the first display signal and/or the second display signal.
Preferably, the first display signal includes: a first light-up signal, a first flicker signal, and a first light-out signal, the second display signal including: a second lighting signal, a second blinking signal, and a second extinguishing signal; the first lighting signal indicates that the vehicle is in a four-drive high-speed driving state or a transfer case is in a fault state, the first flicker signal indicates that the vehicle is converted from a two-drive driving state to a four-drive high-speed driving state or from a four-drive low-speed driving state to a four-drive high-speed driving state, the first extinction signal indicates that the vehicle is in a two-drive driving state or a four-drive low-speed driving state, the second lighting signal indicates that the vehicle is in a four-drive low-speed driving state or a transfer case is in a fault state, the second flicker signal indicates that the vehicle is converted from a four-drive high-speed driving state to a four-drive low-speed driving state, and the second extinction signal indicates that the vehicle is in a two-drive driving state or a four-drive high-speed driving state;
the instrument comprises a first indicator light and a second indicator light;
the first indicator light is used for being turned on when the first display signal is a first turning-on signal, flashing when the first display signal is a first flashing signal, and turning off when the first display signal is a first turning-off signal;
the second indicator light is used for turning on the second display signal, turning off the second display signal and turning off the second display signal when the second display signal is a second turning-on signal and the second display signal is a second turning-off signal.
Preferably, the driving state signal of the electronic transfer case and the driving state signal of the mechanical transfer case are transmitted in the signal transmission system with the same message address and the same period.
Preferably, the first display signal and the second display signal are transmitted in the signal transmission system at the same message address and the same period as the driving state signal.
The technical scheme of the invention has the following beneficial effects:
the electronic transfer case and the mechanical transfer case can be compatible, namely the electronic transfer case can be connected, and when the electronic transfer case is used for replacing the mechanical transfer case or the mechanical transfer case is used for replacing the electronic transfer case, large hardware structure and software change are not needed, and an electronic control module is not needed to be changed, so that the realization of all functions can be ensured, including the transmission of a driving state signal of the changed transfer case to the electronic control module.
Drawings
Fig. 1 is a schematic structural diagram of a signal transmission system of a vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a signal transmission system of a vehicle in an embodiment of the invention when connected to a mechanical transfer case;
fig. 3 is a schematic structural diagram of the signal transmission system of the vehicle in the embodiment of the invention when the signal transmission system is connected with the electronic transfer case.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate a relative positional relationship, which changes accordingly when the absolute position of the object to be described changes.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a signal transmission system of a vehicle according to an embodiment of the invention, where a signal transmission system 10 of the vehicle includes:
a Gateway (GW) 13, a meter (IPC) 11, a first bus 12, and a second bus 14;
the gateway 13 includes two bus interfaces, namely a first bus interface and a second bus interface;
the meter 11 includes a bus interface and a hard-wire interface, the hard-wire interface being an interface for connection with a mechanical transfer case to receive a drive status signal of the mechanical transfer case;
the first bus 12 (may also be referred to as an IBUS bus or an entertainment system bus) is configured to connect the gateway 13 and the meter 11, where one end of the first bus 12 is connected to a first bus interface of the gateway 13, and the other end is connected to a bus interface of the meter 11;
the second bus 14 (also called VBUS bus, or power system bus) includes at least three connection terminals, where one connection terminal is a connection terminal for connection with an electronic transfer case, one connection terminal is connected to the second bus interface of the gateway 13, and the other connection terminal is connected to an electronic control module that receives a driving status signal of the electronic transfer case or the mechanical transfer case, respectively.
Wherein the driving state signal includes: a four-drive high-speed state signal, a four-drive low-speed state signal, a two-drive state signal and an abnormal state signal. The first bus 12 and the second bus 14 may specifically be CAN (Controller Area Network ) buses.
In different driving states, the control logic of the electronic control module is different, so that the driving state signal of the electronic transfer case or the mechanical transfer case needs to be received, and then corresponding logic control is performed according to the current driving state signal. Specifically, the electronic control module may include at least one of the following three: an engine control system, a body electronic stabilization system and an automatic gearbox control module of an automobile. When the electronic control module includes an engine control system, a vehicle body electronic stabilization system and an automatic gearbox control module, the second bus 14 is provided with at least five connection terminals, two of which are respectively used for connecting with the gateway 13 and the electronic transfer case, and the other three of which are respectively used for connecting with the engine control system, the vehicle body electronic stabilization system and the automatic gearbox control module.
The signal transmission system of the vehicle, provided by the embodiment of the invention, can be compatible with an electronic transfer case and a mechanical transfer case, namely can be connected with the electronic transfer case or the electronic transfer case, and does not need large hardware structure and software modification when the electronic transfer case is replaced by the electronic transfer case or the mechanical transfer case, and does not need to modify an electronic control module, so that the realization of all functions can be ensured, including the transmission of a driving state signal of the modified transfer case to the electronic control module, and the control logic of a whole vehicle power system is unchanged.
Referring to fig. 2, when the signal transmission system of the vehicle is connected to a mechanical transfer case, the meter 11 is configured to transmit the driving status signal of the mechanical transfer case received by the meter to the gateway 13 through the first bus 12; the gateway 13 is configured to receive, through the first bus 12, a driving state signal of the mechanical transfer case transmitted from the meter 11, and transmit the driving state signal to the electronic control module through the second bus 14.
Specifically, the driving state signal st_4h_4l of the mechanical transfer case is sent at 20mS period (update) under the address of the message ID0x220, and the specific signals sent are: 0x0: inactive,0x1:4h,0x2:4L and 0x3: error, respectively represents a two-drive state signal, a four-drive high-speed state signal, a four-drive low-speed state signal and an abnormal state signal.
Referring to fig. 3, when the signal transmission system of the vehicle is connected with an electronic transfer case, the electronic transfer case includes an electronic transfer case controller, and the electronic transfer case controller is configured to send out a driving state signal, a first display signal and a second display signal of the electronic transfer case; the second bus 14 is used for transmitting the driving state signal of the electronic transfer case to the electronic control module; the gateway 13 is configured to receive the first display signal and/or the second display signal transmitted from the second bus 14, and transmit the first display signal and/or the second display signal to the meter 11 through the first bus 12; the meter 11 is configured to receive the first display signal and/or the second display signal from the first bus 12, and perform a corresponding display according to the first display signal and/or the second display signal.
Specifically, the electronic transfer case is programmed on the second bus 14 to support the ISO11898 protocol with a communication rate of 500Kbps. The driving state signal of the electronic transfer case and the driving state signal of the mechanical transfer case are sent in the signal transmission system with the same message address and the same period, that is, the driving state signal St_4H_4L of the electronic transfer case is still sent with the 20mS period (updating) under the message ID0x220 address, and the specific sent signals are also: 0x0: inactive,0x1:4H,0x2:4L and 0x3: error.
The first display signal and/or the second display signal are/is transmitted in the signal transmission system at the same message address and the same period as the driving state signal, i.e. the first display signal 4h_st and the second display signal 4l_st are also transmitted at the message ID0x220 address at a 20mS period (update). The first display signal 4h_st is specifically: the second display signals 4L_St are specifically: 0x 0:active, 0x1:4L, and 0x2:4Lblink.
In summary, in the signal transmission system, the gateway 13 may forward the message with ID0x220 from the first bus 12 to the second bus 14, and may forward the message with ID0x220 from the second bus 14 to the first bus 12, so that the signal transmission system may be compatible with the electronic transfer case and the mechanical transfer case, that is, may implement all the required functions regardless of the electronic transfer case or the mechanical transfer case. And, when switching to use the electronic transfer case and the mechanical transfer case, the software development cost and time associated with the gateway can be reduced.
Specifically, referring to fig. 2, the signal transmission system of the vehicle further includes a first hard wire 15 (may also be referred to as a 4H hard wire) and a second hard wire 16 (may also be referred to as a 4L hard wire), wherein one end of each of the first hard wire 15 and the second hard wire 16 is connected to a hard wire interface of the meter 11, and the other end is used for being connected to the mechanical transfer case; the meter 11 is configured to determine that a driving state signal of the mechanical transfer case is a four-wheel drive high-speed state signal when a low-level signal exists on the first hard wire 15 and the second hard wire 16 is in a suspended state; when a low-level signal exists on the second hard wire 16 and the first hard wire 15 is in a suspended state, determining that a driving state signal of the mechanical transfer case is a four-wheel-drive low-speed state signal; when the first hard wire 15 and the second hard wire 16 are in a suspended state, determining that the driving state signal of the mechanical transfer case is a two-drive state signal; when there is a low level signal on both the first hard wire 15 and the second hard wire 16, it is determined that the driving state signal of the mechanical transfer is an abnormal state signal.
In this embodiment of the present invention, when the mechanical transfer case is connected, the meter 11 receives signals transmitted by the mechanical transfer case through the first hard wire 15 and the second hard wire 16, obtains current driving status signals of the mechanical transfer case according to the signals on the first hard wire 15 and the second hard wire 16, and transmits the current driving status signals of the mechanical transfer case to the gateway 13 through the first bus 12, and the gateway 13 transmits the current driving status signals to the electronic control module through the second bus 14.
In the embodiment of the present invention, when the transfer case connected to the signal transmission system of the vehicle is a mechanical transfer case, the meter 11 is configured to display the driving state signal of the mechanical transfer case according to the driving state signal received by the meter.
Specifically, the meter 11 includes a first indicator light and a second indicator light;
the driving state signals of the mechanical transfer case comprise four-drive high-speed state signals, four-drive low-speed state signals, two-drive state signals and abnormal state signals;
the first indicator lamp is used for being turned on when the driving state signal of the mechanical transfer case is a four-drive high-speed state signal, turned off when the driving state signal of the mechanical transfer case is a four-drive low-speed state signal or a two-drive state signal, and flashing or turning on when the driving state signal of the mechanical transfer case is an abnormal state signal;
the second indicator lamp is used for being turned on when the driving state signal of the mechanical transfer case is a four-drive low-speed state signal, turned off when the driving state signal is a four-drive high-speed state signal or a two-drive state signal, and flashing or turning on when the driving state signal is an abnormal state signal.
In this embodiment, when the driving state signal of the mechanical transfer case is a four-drive high-speed state signal, that is, when the mechanical transfer case is in a four-drive high-speed gear, the first indicator light is always on, and the second indicator light is always off; when the driving state signal of the mechanical transfer case is a four-drive low-speed state signal, namely, the mechanical transfer case is in a four-drive low-speed gear, the first indicator lamp is normally turned off, and the second indicator lamp is normally turned on; when the driving state signal of the mechanical transfer case is a two-drive state signal, namely, the mechanical transfer case is in two-drive gear, the first indicator lamp and the second indicator lamp are all normally turned off; when the driving state signal of the mechanical transfer case is an abnormal state signal, namely, the mechanical transfer case fails, the first indicator lamp and the second indicator lamp are both always on or both flash. The first indicator light and the second indicator light are mainly used for intuitively displaying which driving state the mechanical transfer case is currently in, and the lighting logic of the first indicator light and the second indicator light can be free from the limitation, for example, when the mechanical transfer case is in a four-drive high-speed gear, the first indicator light and the second indicator light are always on; when the mechanical transfer case is in a four-wheel drive low-speed gear, one of the first indicator lamp and the second indicator lamp is normally on, and the other is off; when the mechanical transfer case is in two drive gears, the first indicator lamp and the second indicator lamp are all normally turned off; when the mechanical transfer case fails, both the first indicator light and the second indicator light flash.
In the embodiment of the invention, when the transfer case connected with the signal transmission system of the vehicle is an electronic transfer case, the electronic transfer case comprises an electronic transfer case controller, and the electronic transfer case controller is used for sending out a driving state signal, a first display signal and a second display signal of the electronic transfer case; the gateway 13 is configured to receive the first display signal and/or the second display signal transmitted from the second bus 14, and transmit the first display signal and/or the second display signal to the meter 11 through the first bus 12; the meter 11 is configured to receive the first display signal and/or the second display signal from the first bus 12, and perform a corresponding display according to the first display signal and/or the second display signal.
Specifically, the first display signal includes: a first on signal (0x1:4h in the first display signal 4h_st), a first off signal (0x2:4h blank in the first display signal 4h_st), and a first off signal (0x0:active in the first display signal 4h_st), the second display signal including: a second lighting signal (0x1:4l in the second display signal 4l_st), a second blinking signal (0x2:4lblink in the second display signal 4l_st), and a second blanking signal (0x0:inactive in the second display signal 4l_st); the first lighting signal indicates that the vehicle is in a four-drive high-speed driving state or a transfer case is in a fault state, the first flicker signal indicates that the vehicle is converted from a two-drive driving state to a four-drive high-speed driving state or from a four-drive low-speed driving state to a four-drive high-speed driving state, the first extinction signal indicates that the vehicle is in a two-drive driving state or a four-drive low-speed driving state, the second lighting signal indicates that the vehicle is in a four-drive low-speed driving state or a transfer case is in a fault state, the second flicker signal indicates that the vehicle is converted from a four-drive high-speed driving state to a four-drive low-speed driving state, and the second extinction signal indicates that the vehicle is in a two-drive driving state or a four-drive high-speed driving state;
the meter 11 includes a first indicator lamp (also referred to as a 4H indicator lamp, or a four-wheel drive high-speed indicator lamp) and a second indicator lamp (also referred to as a 4L indicator lamp, or a four-wheel drive low-speed indicator lamp);
the first display signal is used for controlling the first indicator lamp, and the second display signal is used for controlling the second indicator lamp;
the first indicator light is used for being turned on when the first display signal is a first turning-on signal, flashing when the first display signal is a first flashing signal, and turning off when the first display signal is a first turning-off signal;
the second indicator light is used for turning on the second display signal, turning off the second display signal and turning off the second display signal when the second display signal is a second turning-on signal and the second display signal is a second turning-off signal.
In the embodiment of the present invention, the lighting logic of the first indicator light and the second indicator light is: when the electronic transfer case is in a two-drive gear, the first indicator lamp and the second indicator lamp are normally turned off; when the electronic transfer case is shifted from a two-drive gear to a four-drive high-speed gear, the first indicator lamp flashes in the gear shifting process, and the first indicator lamp is always on after the gear shifting is finished; when the electronic transfer case is shifted from the four-drive high gear to the two-drive gear, the first indicator lamp is turned off; when the electronic transfer case is shifted from the four-wheel drive high-speed gear to the four-wheel drive low-speed gear, the second indicator lamp flashes in the gear shifting process, and the second indicator lamp is lighted after the gear shifting is finished; when the electronic transfer case is shifted from the four-wheel drive low gear to the four-wheel drive high gear, the first indicator lamp blinks in the gear shifting process, and the first indicator lamp is lighted after the gear shifting is finished. If the electronic transfer case fails, the first indicator light and the second indicator light are simultaneously lighted. Wherein the lighting logic of the first indicator light and the second indicator light is not limited by the above. In other embodiments, other display modes may be used to intuitively display the current driving state of the electronic transfer case.
In addition, the shift from the two-drive to the four-drive high-speed gear and the shift from the four-drive high-speed gear to the two-drive gear are when the vehicle is in a high-speed running state, and the shift from the four-drive high-speed gear to the four-drive low-speed gear or the shift from the four-drive low-speed gear to the four-drive high-speed gear is when the vehicle is in a parking state or a step-on-off state of a manual gear or a neutral state of an automatic gear.
In summary, the signal transmission system of the vehicle provided by the embodiment of the invention can be suitable for the existing vehicle type using the traditional mechanical transfer case and also suitable for the vehicle in which the mechanical transfer case is replaced by the electronic transfer case. The signal transmission system enables transmission of the drive status signal of the transfer case (electronic or mechanical) to the respective electronic control module, whether a mechanical transfer case or an electronic transfer case is used, while also displaying the current drive status of the transfer case (electronic or mechanical) on the meter 11 in real time.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (8)
1. A signal transmission system of a vehicle, comprising:
gateway, meter, first bus and second bus;
the gateway comprises a first bus interface and a second bus interface;
the instrument comprises a bus interface and a hard wire interface, wherein the hard wire interface is an interface used for being connected with a mechanical transfer case so as to receive a driving state signal of the mechanical transfer case;
the first bus is used for connecting the gateway and the instrument, one end of the first bus is connected with a first bus interface of the gateway, and the other end of the first bus is connected with a bus interface of the instrument;
the second bus comprises at least three connecting ends, wherein one connecting end is a connecting end used for being connected with an electronic transfer case, one connecting end is connected with a second bus interface of the gateway, and the other connecting ends are respectively connected with an electronic control module for receiving driving state signals of the electronic transfer case or the mechanical transfer case;
the meter is used for transmitting the received driving state signal of the mechanical transfer case to the gateway through the first bus;
the gateway is used for receiving the driving state signal of the mechanical transfer case transmitted by the instrument through the first bus and transmitting the driving state signal to the electronic control module through the second bus;
the second bus is further used for transmitting a driving state signal of the electronic transfer case to the electronic control module;
the electronic control module comprises at least one of the following three: an engine control system, a body electronic stabilization system and an automatic gearbox control module of an automobile.
2. The signal transmission system of a vehicle of claim 1, further comprising a first hard-wire and a second hard-wire, one end of each of the first hard-wire and the second hard-wire being connected to a hard-wire interface of the meter, the other end of each of the first hard-wire and the second hard-wire being adapted to be connected to the mechanical transfer case;
the instrument is used for judging that the driving state signal of the mechanical transfer case is a four-drive high-speed state signal when the first hard wire has a low-level signal and the second hard wire is in a suspended state; when a low-level signal exists on the second hard wire and the first hard wire is in a suspended state, judging that a driving state signal of the mechanical transfer case is a four-drive low-speed state signal; when the first hard wire and the second hard wire are in a suspended state, judging that a driving state signal of the mechanical transfer case is a two-drive state signal; and when the first hard wire and the second hard wire are both provided with low-level signals, judging that the driving state signal of the mechanical transfer case is an abnormal state signal.
3. The signal transmission system of a vehicle of claim 1, wherein the meter is configured to display based on the received drive status signal of the mechanical transfer case.
4. A signal transmission system for a vehicle according to claim 3, wherein the meter includes a first indicator light and a second indicator light;
the driving state signals of the mechanical transfer case comprise four-drive high-speed state signals, four-drive low-speed state signals, two-drive state signals and abnormal state signals;
the first indicator lamp is used for being turned on when the driving state signal of the mechanical transfer case is a four-drive high-speed state signal, turned off when the driving state signal of the mechanical transfer case is a four-drive low-speed state signal or a two-drive state signal, and flashing or turning on when the driving state signal of the mechanical transfer case is an abnormal state signal;
the second indicator lamp is used for being turned on when the driving state signal of the mechanical transfer case is a four-drive low-speed state signal, turned off when the driving state signal is a four-drive high-speed state signal or a two-drive state signal, and flashing or turning on when the driving state signal is an abnormal state signal.
5. The signal transmission system of a vehicle of claim 1, wherein the electronic transfer case includes an electronic transfer case controller for issuing a drive status signal, a first display signal, and a second display signal for the electronic transfer case; the gateway is used for receiving the first display signal and/or the second display signal transmitted from the second bus and transmitting the first display signal and/or the second display signal to the instrument through the first bus; the instrument is used for receiving the first display signal and/or the second display signal from the first bus and correspondingly displaying according to the first display signal and/or the second display signal.
6. The signal transmission system of a vehicle according to claim 5, wherein,
the first display signal includes: a first light-up signal, a first flicker signal, and a first light-out signal, the second display signal including: a second lighting signal, a second blinking signal, and a second extinguishing signal; the first lighting signal indicates that the vehicle is in a four-drive high-speed driving state or a transfer case is in a fault state, the first flicker signal indicates that the vehicle is converted from a two-drive driving state to a four-drive high-speed driving state or from a four-drive low-speed driving state to a four-drive high-speed driving state, the first extinction signal indicates that the vehicle is in a two-drive driving state or a four-drive low-speed driving state, the second lighting signal indicates that the vehicle is in a four-drive low-speed driving state or a transfer case is in a fault state, the second flicker signal indicates that the vehicle is converted from a four-drive high-speed driving state to a four-drive low-speed driving state, and the second extinction signal indicates that the vehicle is in a two-drive driving state or a four-drive high-speed driving state;
the instrument comprises a first indicator light and a second indicator light;
the first indicator light is used for being turned on when the first display signal is a first turning-on signal, flashing when the first display signal is a first flashing signal, and turning off when the first display signal is a first turning-off signal;
the second indicator light is used for turning on the second display signal, turning off the second display signal and turning off the second display signal when the second display signal is a second turning-on signal and the second display signal is a second turning-off signal.
7. The signal transmission system of a vehicle according to claim 1, wherein the drive state signal of the electronic transfer case and the drive state signal of the mechanical transfer case are transmitted in the signal transmission system with the same message address and the same period.
8. The signal transmission system of a vehicle according to claim 5, wherein the first display signal and the second display signal are transmitted in the signal transmission system at the same message address and the same period as the driving state signal.
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