JP2008049731A - Vehicle information display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle information display for obtaining and suitably displaying vehicle information in correspondence with K line and CAN communication by being connected to a vehicle side failure diagnosis connector mounted on an ECU of a vehicle. <P>SOLUTION: The vehicle information display is provided with a vehicle information obtaining means for continuously obtaining the vehicle information by connecting a connector for connection to the connector for vehicle diagnosis arranged on the vehicle side, a vehicle information processing means for suitably processing the vehicle information obtained by the vehicle information obtaining means, and a vehicle information display means for suitably altering the vehicle information processed by the vehicle information obtaining means and displaying the vehicle information on a screen. The connector for connection connected to the connector for vehicle diagnosis is equipped with a function for taking out the vehicle information of the vehicle in correspondence with CAN communication. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle information display device that acquires vehicle information from a vehicle diagnosis connector provided in a vehicle and displays vehicle information such as vehicle speed, engine speed, or water temperature immediately and continuously.

Some vehicle information display devices in the prior art are disclosed by the same applicant.
As shown in FIG. 14, a main body side harness 2 is connected to the main body 1 of the vehicle information display device, and a connecting connector 3 is attached to an end of the main body side harness 2.

  On the other hand, a vehicle diagnosis connector 4 (diagnostic connector, connector conforming to ISO 9141, ISO 14230 or JIS D5404) connected to an electronic control unit (ECU) disposed in a motor, transmission, brake, or the like (not shown) of a vehicle such as an automobile. ) Is connected to a connector 5 that is detachable corresponding to the vehicle diagnostic connector 4.

  For example, a main harness 6 such as an OBDII (vehicle function diagnosis system 2) cable is connected to the connection connector 5, and a connection connector 7 is attached to the other end of the main harness 6. .

  By connecting the connecting connector 7 attached to the main harness 6 and the connecting connector 3 attached to the main body side harness 2, the vehicle diagnosis connector 4 and the main body 1 of the vehicle information display device are electrically connected. Can be connected.

  Thus, by electrically connecting the vehicle diagnosis connector 4 and the vehicle information display device main body 1, the vehicle information display device main body 1 can output various types of vehicle information output from the vehicle diagnosis connector 4 ( Diagnostic code) can be acquired continuously.

  The vehicle information acquired by this acquisition means includes vehicle information output to the K line of the vehicle diagnosis connector 4, for example, vehicle speed, engine (motor) speed, water temperature, ignition timing, injector injection time, intake air temperature. Vehicle information such as airflow voltage, boost voltage, boost pressure, 02 sensor voltage, 02 sensor voltage rear, air fuel efficiency correction coefficient, battery voltage, throttle sensor voltage, WGV1, WGV2 or failure code.

  A cigar plug 9 is connected to the cigar socket 8 provided in the vehicle. An ignition / accessory harness 10 is connected to the cigar plug 9, and a connection terminal 11 is attached to an end of the ignition / accessory harness 10.

  The cigar plug 9 is not limited to connecting the cigar plug 9 to the cigar socket 8 as long as it can be electrically connected to the ignition or accessory wiring of the vehicle. For example, the cigar plug 9 is omitted, The ignition / accessory harness 10 can also be electrically connected directly to the ignition or accessory wiring.

  The main harness 6 is formed by bundling a plurality of signal lines, and one of the ignition signal lines 12 is an ignition signal line 12a on the connection connector 5 side and an ignition signal line on the connection connector 7 side. The connection terminals 13a and 13b are attached to the ignition signal lines 12a and 12b, respectively.

  In this way, when the connection terminal 11 and the connection terminal 13b are connected, when an ignition key (not shown) of the vehicle is operated, for example, when the accessory is turned on so that the electronic device of the vehicle is turned on. The voltage supplied from the cigar socket 8 can be detected by the main body 1 of the vehicle information display device via the cigar socket 8 provided in the vehicle.

  FIG. 15 shows that the main body 1a of the vehicle information display device and the vehicle diagnosis connector 4a disposed on the vehicle are connected via the connection connector 5a, and the main body 1a of the vehicle information display device and the vehicle are arranged on the vehicle. It is the schematic of the state with which the provided cigar socket 8a was connected via the cigar plug 9a.

  The main body 1a of the vehicle information display device acquires the vehicle information output to the K line 18 of the vehicle diagnosis connector 4a via the connection connector 5a connected to the vehicle diagnosis connector 4a.

  The acquired vehicle information is transmitted to the microcomputer 20 as processing means for processing the vehicle information via the K-line communication interface circuit 19 of the main body 1a of the vehicle information display device.

  The K-line communication interface circuit 19 converts the vehicle information output to the K-line 18 into a signal that can be processed by the microcomputer 20, such as a UART signal.

  The microcomputer 20 processes the transmitted vehicle information by a predetermined calculation stored in the storage unit 21. Information processed by the microcomputer 20, for example, the previous display contents and the vehicle information output to the K line 18 may be stored in the storage unit 21 as necessary.

  Information stored in the storage means 21 is read into the microcomputer 20 when necessary. In addition, when the power is turned off after using the main body 1a of the vehicle information display device, the storage unit 21 reads information before turning off the power into the microcomputer 20, and before turning off the power. Information can also be fed back to the vehicle diagnosis connector 4a.

  Then, it becomes possible to hold the information set by operating the previous operation switch 16e and to omit the setting again, and when the previous information and the information when the power is turned on are remarkably different. Notification can also be made by a notification means.

  Information processed by the microcomputer 20 is immediately and continuously notified to the user of the vehicle by a screen display by the display monitor 14a and a warning sound by the buzzer 15.

In short, when the operation switch 16c is operated and, for example, the content notified by the notification means is the engine speed, the engine speed of the vehicle that changes from moment to moment is displayed immediately and continuously on the display monitor 14a. In addition, the engine speed is continuously monitored, and when a preset engine speed is exceeded, a warning sound is immediately generated and notified.
JP 2004-359127 A (2nd to 5th pages, FIG. 1)

However, even if the vehicle information display device of the prior art described in the background section above uses the vehicle diagnosis connector disposed on the vehicle side, the vehicle diagnosis connector K used on the vehicle side is used. Only vehicle information output to the line is used, and since it is not configured to support CAN (Controller Area Network) communication, vehicle information cannot be obtained for a vehicle equipped with CAN communication. There is a problem.
In addition, since it cannot be applied to a vehicle equipped with CAN communication, for example, it is impossible to control to increase or decrease fuel injection amount by using CAN communication to improve fuel efficiency and to control to turn on or off the electric fan. There is.
Further, since the configuration is limited to only the diagnostic connector, for example, an efficient fuel consumption can be achieved by obtaining an A / F value by connecting to an A / F sensor or displaying the screen in comparison with the rotation speed. There is also a problem that it cannot be controlled.

  Therefore, the present invention is not limited to vehicles that support K-line, and can be used for both vehicles equipped with K-line and vehicles that support CAN communication, and is not limited to the vehicle diagnosis connector. There is a problem that must be solved in a vehicle information display device that also incorporates signals.

  In order to solve the above problems, a vehicle information display device according to the present invention is configured as follows.

(1) The vehicle information display device includes a vehicle information acquisition unit capable of continuously acquiring vehicle information by connecting a connection connector to a vehicle diagnosis connector disposed on the vehicle side, and the vehicle information acquisition. Vehicle information processing means for appropriately processing the vehicle information acquired by the means, and vehicle information display means for displaying the vehicle information processed by the vehicle information acquisition means on a screen, wherein the vehicle information acquisition means is adapted for CAN communication. It has a function of acquiring vehicle information of a corresponding vehicle.
(2) The vehicle information display device according to (1), which has a function of controlling increase / decrease in the fuel injection amount using a command that can be decoded by CAN communication in the case of a vehicle that supports CAN communication. .
(3) Further, in addition to the connector for connection to the vehicle diagnostic connector, an acquisition means for acquiring information such as an A / F sensor, a hydraulic pressure sensor, or an oil temperature sensor is provided (1) ) Vehicle information display device.

  The vehicle information display device of the present invention can be attached to both vehicles of CAN communication compatible vehicles in addition to K line compatible vehicles, and is present by making it possible to obtain similar vehicle information. There is an effect that vehicle information can be obtained by attaching the device of the present application to all vehicles.

  In addition, since the vehicle that supports CAN communication is provided with a function for controlling the increase / decrease in the fuel injection amount, it is possible to perform unique fuel control and improve fuel efficiency.

  Further, by providing an acquisition means for acquiring information such as an A / F sensor, a hydraulic pressure sensor, or an oil temperature sensor without using a vehicle diagnosis connector, for example, the rotational speed and the hydraulic pressure are displayed in comparison. And the rotation speed can be controlled efficiently.

  Next, an embodiment of a vehicle information display device according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the vehicle information display device of the present invention includes a main body 31 having a function of displaying various vehicle information, a connector portion 32 for directly connecting to a vehicle diagnosis connector 47, and a cigar socket. It comprises an ignition connector section 34 having a cigar plug 33 for insertion, and an adapter section 35 for connecting an external water temperature sensor and a voltage input connector.

  As shown in FIGS. 1 and 2, the main body 31 has a rectangular part of the right-hand side portion provided as an operation part 36 as a part in which one end in the longitudinal direction formed in a rectangular parallelepiped shape is formed into a semicircular shape. The display unit 37 is configured such that the main body side harness 38 is pulled from the apex portion of the operation unit 36 and the main body side connector 39 is provided at the end thereof.

  The operation unit 36 includes a rotary encoder 41 with a disk-like push switch (ENTER switch) at the center position, and LEFT switch 42, UP switch 43, RIGHT that are arranged at equal intervals around the rotary encoder 41. The switch 44 and the DOWN switch 45 are arranged.

The display unit 37 is formed by a color graphic liquid crystal display unit of 160 dots × 128 dots, for example, and is connected to the microcomputer 58 (see FIG. 6) by a 16-bit parallel bus.
The display unit 37 is connected to a vehicle diagnosis connector 47 of a CAN-compatible T car and displays vehicle information. The display items are vehicle speed, engine speed, water temperature, ignition timing, injector injection time, airflow sensor voltage, intake air temperature, outside air temperature, intake manifold pressure, 02 voltage, 02 rear voltage, A / F voltage 1, A / F voltage 2 , Intake air volume, battery voltage, throttle opening, AT oil temperature, gear position (lockup), 4WD ratio, diagnostic ratio, external water temperature sensor, external voltage, instantaneous fuel consumption There is.

  In addition, the above 24 types of display items can be displayed by a double digital, a 6 digital, and a needle meter.

  FIG. 3 is a display reference diagram displayed on the display unit. The intake air temperature (INTAK) is displayed like a pointer meter, and “FN” is displayed at the lower left of the screen when the fan is driven.

  FIG. 4 is a dual digital screen displayed on the display unit. The measured temperature when the ideal intake air temperature (INTAK) is 20 ° C. is “20”, and the ideal water temperature (WATER) temperature is When the temperature is 66 ° C., the actual water temperature is displayed as “64”.

  FIG. 5 shows a 6-unit digital screen displayed on the display unit, that is, intake air temperature (INTAK), water temperature (WATER), engine speed (TACHO), outside air temperature (OTMP), ignition timing (IGNIT), oil pressure (ATOIL). 6 types of digital data are displayed. The displayed items can be changed as appropriate.

  In FIG. 1, the connector portion 32 includes a connecting connector 45 that is connected to the main body side connector 39 of the main body 31, and a connection connector 48 that is connected to a vehicle diagnostic connector 47 at the end portion through the main harness 46. It has a configuration. On the connection connector 45 side, an adapter connection connector 49 that is connected to the adapter connector 55 of the adapter unit 35 is provided, and an ignition connection connector 51 is provided in part. The ignition connection connector 51 is opened in the case of a vehicle compatible with CAN communication, and is connected to the ignition connector 53 in the case of a vehicle other than a vehicle compatible with CAN communication.

  The ignition connector portion 34 is configured to include an ignition connector 53 at the end of the ignition harness 52 and a cigar plug 54 at the opposite end.

  The adapter unit 35 includes an adapter connector 55 connected to the adapter connection connector 49 of the connector unit 32 at the end, a water temperature sensor connector 56 connected to the water temperature sensor at the opposite end, and a hydraulic sensor connector connected to the hydraulic sensor. 57 is provided.

  FIG. 6 shows that a vehicle information display device main body 31 and a vehicle diagnosis connector 47 arranged on the vehicle are connected via a connection connector 48, and the vehicle information display device main body 31 and the vehicle are arranged on the vehicle. It is a schematic block diagram of the state connected via the provided cigar socket and the cigar plug 33. FIG.

  The main body 31 is supplied with power from a battery (not shown) provided in the vehicle from the vehicle diagnosis connector 47. The means for obtaining the power supply of the vehicle information display device main body 31 is not limited to receiving the power supplied from the vehicle diagnosis connector 47, but for example, receiving power from a cigar socket or using a battery or the like. May be.

  The main body 31 includes a color LCD display 37, a microcomputer 58, an EEPROM 59, an A / F sensor that is a full range sensor that measures the ratio of fuel and air, or a hydraulic sensor that measures oil pressure in the engine. The CAN communication and the microcomputer 58 are mediated through a voltage input circuit 61 for inputting a signal, a thermistor connection circuit 62 for inputting a signal from an oil temperature sensor for measuring the temperature of oil in the engine, and a vehicle diagnosis connector 47. The CAN controller is built in the microcomputer 58 and performs K-line communication via the CAN communication interface circuit 63 having only the CAN driver function and the connection connector 48, and the K line signal is set to a UART signal level that can be processed by the microcomputer 58. K line communication interface circuit 64 to convert, buzzer 65, operation Switch 66, and a like.

  The vehicle diagnosis connector 47 is a connector described in the standard of JIS D5404.

  The connector 48 is a connector described in the standard of JIS D5404 like the vehicle diagnostic connector, and is + 12V (battery power connected to 16 pins), K line signal (K line connected to 7 pins) Signal), CAN_H signal (CAN High signal connected to pin 6), CAN_L signal (CAN Low signal connected to pin 14), and GND (GND signal connected to pin 4).

  The operation switch 66 is connected to the input port of the microcomputer 58 and is used when changing the LCD display screen of the display unit 37.

  The buzzer 65 is connected to the buzzer output port of the microcomputer 58, and when the switch is pressed, it makes a beep and surely notifies that it has been pressed.

The EEPROM 57 stores information obtained by K-line communication or CAN communication, the previous screen number, and the like, and does not store the program of the microcomputer 58 here. Recording / reproduction for about 1 to 2 minutes is possible, and they are connected using an I ² C bus.

  The LCD 37 is a so-called display unit, which is a 160-dot × 128-dot color graphic liquid crystal display unit, connected to the microcomputer 58 and a 16-bit parallel bus, and information, contrast, and warnings obtained through K-line communication and CAN communication. Display settings, etc.

The cigar plug 33 can be connected to the ACC signal by the cigar plug 33, but may be connected to the IGN signal of the vehicle. Further, in some vehicles, when connected to the 8th pin of the vehicle diagnosis connector 47, it is connected to the IGN signal.
When the ACC signal is turned ON, the power source of the main body 31 is turned ON to start communication. The ACC signal is connected to the interrupt reception port of the microcomputer 58. When the ACC signal is turned ON, the microcomputer 58 exits the low current consumption mode and returns to the normal operation. Thereafter, initial communication is started. This initial communication will be described later with reference to a flowchart.
When the ACC signal is turned OFF by the ignition key OFF operation, the microcomputer 58 enters the low current consumption mode.
Further, in a vehicle in which CAN communication is mounted, wiring to the cigar plug 33 is not necessary.

The microcomputer 58 detects from the interrupt reception port that the vehicle ECU has started CAN communication, exits the low current consumption mode, and returns to normal operation. Thereafter, initial communication is started.
When the ECU stops responding to CAN communication, the microcomputer enters a low current consumption mode.
Even when this line is not connected, the power can be turned on manually. In this case, when the ECU stops responding to K-line communication or CAN communication, the microcomputer enters the low current consumption mode.

The voltage input circuit 61 is connected to an AD conversion circuit of the microcomputer 58 so that an A / F sensor, a hydraulic pressure sensor, or the like can be connected. The relationship between the A / F value of the A / F sensor used in this example and the output voltage is
A / F value = 2 × output voltage [V] +10
It is made to become the relationship.
When the relationship between the two points in the above equation is set, for example, 10.0 when the voltage input is 0.00V and 20.0 when the voltage input is 5.00V, the intermediate value is proportionally calculated and the A / F value is displayed. it can. The display name and unit can be set to any five characters. For example, a display name such as “A / F” or “PRESS”, a unit such as “RATIO” or “hkPa” may be set and displayed.

  The thermistor connection circuit 62 is connected to the AD conversion circuit of the microcomputer 58 and can be connected to an oil temperature sensor or the like. The thermistor connection circuit 62 is a circuit that converts a resistance value change of the thermistor into a voltage change. The voltage-temperature conversion is programmed in the microcomputer 58.

  The operation of the vehicle information display device having such a configuration will be described below with reference to flowcharts.

  First, FIGS. 7 to 9 are arranged in the microcomputer 58 and the vehicle of the main body 31 of the vehicle information display device based on the information stored in the storage means of the main body 31 of the vehicle information display device shown in FIG. A flowchart for so-called initial communication is shown in which information is communicated between the vehicle diagnosis connectors 47 to automatically set a vehicle manufacturer (vehicle type).

First, initial communication for confirming connection between the main body 31 of the vehicle information display device and the vehicle diagnosis connector 47 is performed (step ST11).
Thereafter, the previously used initial command is sent from the main body 31 of the vehicle information display device to the K line of the connector 48 for connection (step ST12). The communication procedure using the initial command used last time is stored in the EEPROM 59.

  When a response is detected from the K line of the connector 48 for connection and there is a response, communication is started based on the previously set communication procedure (steps ST13 and ST14).

If there is no response in step ST13, detection of a response for a predetermined time is repeated (step ST15).
If there is no response even after a predetermined time has elapsed, a transition is made to the new setting state, and an initial command for the T car is sent to the K line to detect the response (steps ST16 and ST17).
If there is a response in the initial command for the T car, it is determined that the vehicle is a T car, and communication is started using the T car communication procedure (step ST18).

If there is no response in step ST19, detection of the response is repeated for a predetermined time (step ST19).
If there is no response even after a predetermined time has elapsed, a transition is made to the new setting state, and an initial command for N cars is sent to the K line to detect the response (steps ST20 and ST21).
If there is a response in the initial command for N cars, it is determined that the vehicle is N cars, and communication is started using the communication procedure for N cars (step ST22).

  If there is no response in step ST21, detection of the response is repeated for a predetermined time (step ST23).

If there is no response even after a predetermined time has elapsed, a transition is made to the new setting state, and an initial command for the H vehicle is sent to the K line to detect the response (steps ST24 and ST25).
If there is a response in the initial command for the H vehicle, it is determined that the vehicle is the H vehicle, and communication is started using the communication procedure for the H vehicle (step ST26).

  If there is no response at step ST29, detection of the response is repeated for a predetermined time (step ST31).

If there is no response even after a predetermined time has elapsed, a transition is made to the new setting state, and an initial command for the S vehicle is sent to the K line to detect the response (steps ST32 and ST33).
If there is a response in the initial command for the S car, it is determined that the vehicle is the S car, and communication is started using the S car communication procedure (step ST26).

  If there is no response at step ST33, detection of the response is repeated for a predetermined time (step ST35).

If there is no response even after a predetermined time has elapsed, the state shifts to a new setting state, and an initial command based on CAN communication is transmitted to detect the response (steps ST36 and ST37).
If there is a response in the initial command based on CAN communication, it is determined that the vehicle is a vehicle compatible with CAN communication, and communication is started using the CAN communication procedure (step ST38).

When there is no response in step ST37, detection of a response is repeatedly performed for a predetermined time (step ST39).
If no response is received after a predetermined time has elapsed, the vehicle manufacturer cannot be identified, so an error display is performed and the mode is shifted to the low current consumption mode (step ST40).

Next, FIG. 10 shows a flowchart of a process of obtaining vehicle information from the K line of the connector 48 for connection to the microcomputer 58 of the main body 31 of the vehicle information display device after setting by the vehicle manufacturer.
First, in the main body of the vehicle information display device, when the content to be notified is set by operating the operation switch, the microcomputer 58 of the main body 31 of the vehicle information display device communicates with the K line of the vehicle diagnosis connector 48 to notify the content. Is instructed to send a command for transmitting information for displaying (steps ST41 and ST42).

  From the connection connector 48, vehicle information having a content to be notified to the K line is output in accordance with a command instruction, and this vehicle information is acquired by a buffer or microcomputer 58 (not shown) (step ST43).

From the connection connector 48, vehicle information having a content to be notified to the K line is output in accordance with an instruction of the sent command, and this vehicle information is received in a buffer (not shown) (step ST43).
If reception to the buffer does not end even after a predetermined time has elapsed, an error is displayed and the mode is shifted to the low current consumption mode (steps ST44, ST45, ST46).

  When acquisition of vehicle information is completed in step ST44, for example, the next vehicle information that changes every moment is acquired after waiting for a predetermined time, for example, 50 milliseconds (step ST47).

  In this way, vehicle information can be continuously acquired by repeatedly performing a waiting process for a predetermined time from the transmission of the K line command.

  FIG. 11 shows a flowchart of the process of displaying the screen on the display monitor (display unit 37) shown in FIG. When a display instruction signal is output from the microcomputer 58 of the main body 31 of the vehicle information display device to the display monitor, the content of the vehicle information set by operating the operation switch 66 is displayed on the display monitor (step ST51). .

  The display monitor maintains the display of the contents of the vehicle information for a predetermined time, 0.2 seconds in the embodiment, and updates and displays the contents of the next vehicle information output from the microcomputer 58 after the predetermined time has elapsed ( Step ST52).

By repeatedly performing the process of updating and displaying the contents of the vehicle information to the contents of the next vehicle information, the information processed by the microcomputer 58 as the processing means can be displayed immediately and continuously. .
The display form displayed on the display monitor can be displayed like a pointer meter as shown in FIGS. 3 to 5, or can be displayed in two or six series digitally.

Next, when the rotary encoder 41 of the main body 31 shown in FIG. 2 is operated to display an icon menu on the display unit 37, "FUNCTION" is selected from the icon menu, and the next "FUEL INJECTION" is selected, fuel injection An active test command is generated to increase or decrease fuel. Hereinafter, description will be given with reference to the flowchart shown in FIG.
First, when “FUEL INJECTION” is selected by operating the rotary encoder 41 of the main body 31, an active test command for increasing or decreasing fuel is generated (step ST61).

  Next, the rotation number-increase / decrease amount number TO of the active test command generated last time is cleared, and the rotation number-increase / decrease amount number TN transmitted by the current command is also cleared (step ST62).

The current engine speed is latched, the table number TN is represented by (speed / 500 + 1), and TN is up to TN = 7 (step ST63).
Here, the speed-increase / decrease table is
TN = 1: Engine speed 0 to 499 rpm, increase / decrease amount F1 (± 25%),
TN = 2: Engine speed 500 to 999 rpm, increase / decrease amount F2 (± 25%),
TN = 3: Engine speed 1000 to 1499 rpm, increase / decrease amount F3 (± 25%),
TN = 4: Engine speed 1500 to 1999 rpm, increase / decrease amount F4 (± 25%),
TN = 5: engine speed 2000 to 2499 rpm, increase / decrease amount F5 (± 25%),
TN = 6: engine speed 2500 to 2999 rpm, increase / decrease amount F6 (± 25%),
TN = 7: Engine speed 3000 rpm or more, increase / decrease amount F6 (0%),
It has become.

  Next, the table number TO selected by the previous command and the table number TN selected by the current command are the same because both are cleared at this stage, and then a command for interrupting the vehicle information monitor is transmitted. (Steps ST64 and ST65).

  Next, the response waiting for 50 ms to the command for interrupting the vehicle information monitor is ignored (step ST66). The response is ignored because the processing when there is no response and when there is a response is the same.

  Next, the fuel increase / decrease amount FN corresponding to the table number TN based on the engine speed according to the current active test command is sent (step ST67). For example, if the engine speed is 1000 rpm, TN = 3 is selected, and an increase / decrease amount F3 (± 25%) is sent out.

  The 50 ms wait response at this time is ignored (step ST68). This is because the processing does not differ depending on whether or not there is a response, as in the case of ignoring the response to the command for interrupting the vehicle information monitor.

  Next, a vehicle information monitor start command is sent with the previous table number TO and the current table number TN being the same (steps ST69 and ST70).

  Next, jumping to step ST63, the engine speed is latched in the same manner and the table number TN is specified repeatedly, and the state is displayed on the vehicle information monitor (display unit 37).

Next, an active test command based on the electric fan control will be described with reference to a flowchart shown in FIG.
For the electric fan control, when the rotary encoder 41 of the main body 31 shown in FIG. 2 is operated to display an icon menu on the display unit 37, “FUNCTION” is selected from the icon menu, and the next “FUN CONTROL” is selected. An electric fan control command is generated. This electric fan control command compares the water temperature (WATER) observed by the immediately preceding vehicle information monitor (display unit 37) with the set temperature set by the operator, and if it exceeds the ON set temperature, the ON command (ON TMP: 20 to 150 ° C.) is generated, and an OFF command (OFF TMP: 20 to 150 ° C.) is sent if the temperature is lower than the OFF set temperature.

  When the active test command for electric fan control described above is generated, it is next determined whether vehicle information monitor communication is stopped (steps ST71 and ST72). In the vehicle information monitor communication, one or more pieces of vehicle data information are continuously sent from the ECU at regular intervals after the vehicle information monitor start command is sent from the main body. The transmission at regular intervals is stopped about every 3 seconds. The main body 31 is restarted by sending a vehicle information monitor start command.

If the vehicle information monitor communication is stopped, an electric fan control command is sent next (step ST73).
The response waiting for 50 ms is ignored (step ST74). The response is ignored because the processing when there is no response and when there is a response is the same.

Next, a vehicle information start command is sent out (step ST75).
In step ST72, it is detected whether or not the vehicle information monitor communication is stopped, and the electric fan control command and the vehicle information start command are repeatedly sent to display the state of the electric fan on the monitor. It can be done.

  Not limited to K-line compatible vehicles, it can be applied to both vehicles equipped with K-line and vehicles compatible with CAN communication, and the signal from the A / F sensor is not limited to the vehicle diagnosis connector. Provided is a vehicle information display device adapted to be incorporated.

It is the top view which showed roughly the vehicle information display apparatus which concerns on this invention. It is the top view which expanded and showed only the main body schematically. It is explanatory drawing which showed an example of the screen displayed on a display part similarly. It is explanatory drawing which showed an example of the screen displayed on a display part similarly. It is explanatory drawing which showed an example of the screen displayed on a display part similarly. It is a block diagram of a vehicle information display device. It is a flowchart at the time of initial communication. It is a flowchart at the time of initial communication. It is a flowchart at the time of initial communication. 4 is a flowchart showing a process of acquiring vehicle information from the K line. 4 is a flowchart showing a process of displaying a screen on the display unit. It is the flowchart which showed the process for acquiring the fuel increase / decrease in CAN communication similarly. 4 is a flowchart showing a process of electric fan control in CAN communication. It is the top view which showed roughly the vehicle information display apparatus in a prior art. It is a block diagram of the vehicle information display apparatus in a prior art.

Explanation of symbols

31 Main body 32 Connector portion 33 Cigar plug 34 Ignition connector portion 35 Adapter portion 36 Operation portion 37 Display portion 38 Main body side harness 39 Main body side connector 41 Rotary encoder 42 LEFT switch 43 UP switch 44 RIGHT switch 45 Connector for connection 46 Main harness 47 Vehicle Diagnosis connector 48 Connection connector 49 Adapter connection connector 51 Ignition connection connector 52 Ignition harness 53 Ignition connector 55 Adapter connector 56 Water temperature sensor connector 57 Hydraulic sensor connector 58 Microcomputer 59 EEPROM
61 Voltage input circuit 62 Thermistor connection circuit 63 CAN communication interface circuit 64 K line communication interface circuit

Claims (3)

Vehicle information acquisition means capable of continuously acquiring vehicle information by connecting a connector for connection to a vehicle diagnostic connector disposed on the vehicle side;
Vehicle information processing means for appropriately processing the vehicle information acquired by the vehicle information acquisition means;
Vehicle information display means for displaying vehicle information processed by the vehicle information acquisition means on a screen;
With
The vehicle information acquisition unit has a function of acquiring vehicle information of a vehicle corresponding to CAN communication.   The vehicle information display device according to claim 1, further comprising a function of controlling increase / decrease in fuel injection amount using a command that can be decoded by CAN communication in the case of a vehicle that supports CAN communication.   Furthermore, in addition to the connection connector for connecting to the vehicle diagnostic connector, an acquisition means for acquiring information such as an A / F sensor or a hydraulic pressure sensor or an oil temperature sensor is provided. Vehicle information display device.

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