JPS61207244A - Display unit for function diagnostic result of car-mounted apparatus - Google Patents

Abstract

PURPOSE:To make sure of a diagnostic result ever so easy as well as to keep off any misconception, by displaying the diagnostic result on diagnostic items with digital numerical values. CONSTITUTION:A clockwise driving integrated circuit 101 makes sure of whether code operation by various switches 1-6 is performed or not, while it displays an operated value on an indicator 103 when an accessory switch 1 and a light switch 2 are turned on the basis of a reference signal out of a reference signal generating circuit 102. Next, when the code operation is performed, the clockwise driving IC 101 shifts to a diagnostic result display mode and commands the segment display based on a diagnostic signal to be inputted via a buffer circuit 105 to the indicator 103. In addition, concretely it counts pulses of the diagnostic signal for the specified time long and displays the number corresponding to frequency of the diagnostic signal, for example,, the segment display of 2, 4, etc., on the indicator 103. Therefore, a fact that abnormal diagnosis is performed on the diagnostic item corresponding to this number is easily checkable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a function diagnosis result display device for on-vehicle equipment that displays diagnostic results for predetermined items of predetermined functions in on-vehicle equipment.

[Prior Art] In recent years, in order to ensure safety with the electronic control of various parts of automobiles, for example, electronic engine control systems, electronic torque converter control systems, etc. have been equipped with functional diagnostics,
That is, the failure location and failure state are constantly diagnosed.

Conventionally, this type of functional diagnosis result display device has been used, for example, in the "Nilasan Service Number No. 484 Introduction to Nissan Cedrick Gloria Y30 Series Vehicles No. 165"
Pages 169 to 169 Published in June 1980 J, as shown in IFil, the diagnostic results obtained by diagnosing predetermined functions of in-vehicle equipment for predetermined items are displayed by the blinking state of two light emitting diodes, etc. There is. Specifically, for example, a code number is set corresponding to each item, and when an abnormality is diagnosed for that item, the corresponding code number is expressed by the number of blinks of each of the above two light emitting diodes. I have to.

[Problems to be Solved by the Invention] Incidentally, in recent years, electronic control of various parts of automobiles has become more complex, and accordingly, the number of diagnostic items for the functions of in-vehicle equipment tends to increase. Therefore, in a device that displays the diagnosis result by blinking a light emitting diode or the like, such as the conventional functional diagnosis result display device, the present invention provides the above-mentioned diagnosis item [means for solving the problem]. The present invention has been developed by focusing on the problem, and provides a functional diagnosis result display device for in-vehicle equipment that prevents misinterpretation of the display of diagnosis results as much as possible. The configuration includes a display control section that displays diagnostic results of predetermined items in digital numerical values on a digital display section mounted on the vehicle.

[Embodiments of the invention] Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a circuit diagram showing an example of a case where the display means in the functional diagnosis result display device for in-vehicle equipment according to the present invention and the digital display section of the in-vehicle clock are shared.

In the same figure, 100 is a clock device, and this clock device 100 basically includes a clock drive rC101, a reference signal generation circuit 102 consisting of a crystal oscillator oSC and a frequency adjustment capacitor C4, and this reference signal generation circuit. The display @ 103 displays data such as time, month and day calculated by the clock drive IC 101 based on a reference signal from the clock drive IC 102 . Specifically, the display 103 is equipped with 7-segment display elements such as liquid crystal for four digits, as shown in FIG. 2, for example.

To explain the specific configuration of the clock device II 00, the terminal A
, B, and C, battery voltage B is applied directly to terminal A, via accessory switch 1 to terminal B, and via light switch 2 to terminal C, respectively. The battery B voltage input through the terminal A is connected to resistors R1, R2, and Zener diode Dzl.
, is stabilized by a stabilizing circuit 104 composed of a capacitor C1 and applied to the clock drive IC 101, while when the accessory switch 1 is in the on state, the terminal B, diode 0
1. The Zener voltage of the Zener diode []z2, which breaks down due to the battery voltage via the resistor R3, is applied to the clock drive 1C101 via the resistors R3 and R4, and when the light switch 2 is in the on state, the terminal 01
The Zener voltage of the Zener diode Qz3, which breaks down due to the battery IB voltage via the resistor R6, is applied to the clock drive IC 101. Further, the terminal C is connected to the diode D1 via the diode D2.
The zener voltage of the zener diode Dz2 is applied to the display 103 when the 7xenary switch 1 and the light switch 2 are each turned on. Furthermore, the terminals G, H, 1, and J connected to the mode setting input terminals of the clock drive IC 101 are connected to the select switch 3 for changing the time (September, month and day), and the terminal H for selecting the FR (month). Adjustment switch 4, which is used for setting, is connected to terminal ■ for minutes (days).
Terminal J is connected to an adjust switch 5 and a reset switch 6, respectively.

The above configuration is similar to a normal clock device, and the clock drive tcio
i operates in response to the supply of stabilizing voltage from the stabilizing circuit 104, and responds to the current state based on the reference signal from the reference signal generating circuit 102 after the mode setting by the various switches 3 to 6 is completed. It is determined by applying a voltage, and at the time of the determination, internally calculated time (month and day) data is displayed in segments on the display a103.

On the other hand, the clock device 100 also has a function of processing diagnostic results regarding on-vehicle equipment such as an electronic engine control system and an electronic torque converter control system and displaying the results on a display 103. In this embodiment, a number is set in advance for each diagnostic item, and if there is an abnormality in the H diagnostic item, a pulse signal @ of a frequency corresponding to the number (hereinafter referred to as a diagnostic signal) is used for diagnosis. It is assumed that the output will be output from the device.

In FIG. 1, 105 represents resistors R6 and R7.

The buffer circuit 105 is constituted by R8, a capacitor C3, and a Zener diode Dz4° transistor Tr, and this buffer circuit 105 is operated by supplying a battery Bl source through a terminal. A diagnostic signal from a diagnostic device that is manually input to terminal E is input to the clock drive IC 101 via the buffer circuit 105. Here, when the clock drive IC 101 performs a predetermined cryptographic operation using the various switches 1 to 6, for example, the clock drive IC 101 turns on/off the light switch 2 while holding down the select switch 3 and the reset switch 6. It also has a function III that switches from clock mode to diagnostic result display mode when repeated.

In FIG. 1, a terminal F of the timepiece device 10o is connected to one terminal of a battery B as a ground terminal for the entire device, and is also connected to an external ground as a ground terminal for the timepiece drive IC 101. Also, capacitor C2
is for voltage smoothing.

To explain the specific operation, time δ1 drive! 1lIC101
Usually, as shown in FIG. When the accessory switch 1 or the light switch 2 is on, the calculated value is displayed on the display 103. In the above process, when the cryptographic operation is performed, the mode shifts to the diagnosis result display mode. In this diagnostic result display mode, while the calculation of the current time is continued, the buffer circuit 105
The display unit 103 instructs the display 103 to display segments based on the diagnostic signal inputted via the . Specifically, the pulses of the diagnostic signal are counted at a predetermined time, and the counted value, that is, the number corresponding to the frequency of the diagnostic signal, is displayed on the display 103.
I am trying to display it in This allows, for example, the fourth
As shown in the figure, l 2 N, 11 is displayed on the display 103.
If a segment such as 4'' is displayed, it means that an abnormality diagnosis has been made in the diagnosis item corresponding to the number.

As described above, according to this embodiment, the diagnostic results for each item from the diagnostic device are displayed on the display 103 of the clock device 100.
Since the diagnostic results are displayed as digital values, the diagnostic results can be recognized numerically, allowing for more reliable recognition.

Further, a display means for the diagnosis result and a clock device 10
Since the display device 103 is shared with the display device 103 of the vehicle 0, it is possible to effectively utilize the installation space in the vehicle interior where there is not enough space for installing various devices.

In addition, in the above-mentioned embodiment, the case of a digital clock was shown, but it is also possible to use other digital display units (meters).

Since the diagnostic results for the new items are displayed in digital numbers, the diagnostic results can be easily confirmed and misinterpretation can be prevented as much as possible. This effect becomes more pronounced as the number of diagnostic items increases.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an example of a functional diagnosis result display device for in-vehicle equipment according to the present invention, FIG. 2 is an explanatory diagram showing an example of the display device in FIG. 1, and FIG. 3 is a clock shown in FIG. 1. ya arc
FIG. 4 is an explanatory diagram showing an example of the relationship between diagnostic signals and displays. 100...Clock device 101...Clock drive IC 102...Reference signal generation circuit 103...Display device 104...Stabilization circuit 105...Buffer rgJap- 8...Battery i

Claims (1)

[Claims] A device for displaying diagnostic results for predetermined items of a predetermined function in an in-vehicle device, characterized by having a display control unit that displays the diagnostic results in digital numerical values on an in-vehicle digital display unit. Functional diagnosis result display device.