JPH0420815B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a fault display system for automobiles, and more particularly to a fault display system for displaying failures of lamps, solenoids, motors, and other actuators (hereinafter referred to as electrical components) in a digital multiplex transmission system for automobiles. It is something. [Prior art] Conventional technologies in this field include Honda Accord Service Manual, Honda Motor Co., Ltd.
In September 1981, there was something described in PV-6. FIG. 2 is a diagram showing the appearance of the display device described in the above-mentioned document. In this display device, as shown in the figure, a display light row 310 composed of display lights 311 to 322 that performs a series of displays is arranged on the upper side of a combination meter 300 mounted on an automobile instrument panel. The indicator light row 31
0, an indicator light 314 that warns of insufficient battery charge of the AC generator, an indicator light 315 that warns of insufficient lubricating oil, an indicator light 319 that warns of the brake oil level and handbrake status, and an oxidation catalytic converter for exhaust gas. An indicator light 320 that warns about the temperature of the vehicle, an indicator light 321 that warns that the door is not locked, and an indicator light 322 that warns that the vehicle height adjustment device of the suspension is malfunctioning are indicator lights that display warnings. FIG. 3 is a diagram showing details of the display section 330 in FIG.
Reference numerals 3 and 334 indicate indicator lights that warn when the front and rear left and right doors of the vehicle are opened, 335 indicates an indicator light that warns when the trunk lid is opened, and 336 indicates a brake light disconnection warning lamp. Indicator lights 314, 31 that display the above various warnings
5,319,320,321,322,331,
This is an overview of the warning display system currently in practical use, with display devices consisting of 332, 333, 334, 335, and 336, and items set independently by manufacturers from the viewpoint of legal requirements or operability and usability. Warnings are displayed regarding the following. Note that the display device is equipped with a spare indicator light 311,
312, an indicator light 313 that displays the operation of the cruise control, a direction indicator light 31 that indicates the direction
6,317, indicator lights that display the status of electrical components other than warning displays, such as a high beam indicator light 318 that indicates the high beam of the headlight, are also included. [Problems to be Solved by the Invention] However, with the above-mentioned conventional display method, there is no problem with fault warnings for a relatively small number of electrical components;
If you try to display a warning about the failure of a large number of automotive electrical components such as units, sensors, lamps, motors, solenoids, and other actuators, you will need a large number of indicator lights, which is not economical, and There was a problem in that it was difficult for users to quickly decide on countermeasures even if failures were displayed for each electrical component. The present invention has been made in view of the above points, and it eliminates the above problems and enables general users to accurately judge the urgency of troubleshooting without requiring specialized knowledge. The purpose of this invention is to provide a fault display method that is easy to use. [Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a display system that displays the status of various electrical components of an automobile by a plurality of status display means provided corresponding to the electrical components. A plurality of fault display means are provided to classify and display fault information of various electrical components other than those whose status is displayed by the plurality of fault display means, classified by system according to the degree of fault, and to display fault information of various electrical components sent through a digital multiplex transmission path. A fault display system is constructed by providing a means for taking in fault information from the fault state detecting means and classifying it into the fault display means according to the degree of fault and displaying it for each system. Further, the fault information of various electrical components other than the state displayed by the state display means is classified by system according to the degree of fault, and a display means is provided for displaying the fault information superimposed on the state display means, and digital multiplexing is provided. Fault information is received from the fault state detection means of various electrical components sent through transmission lines, and the fault information and other state information are distinguished and displayed on the state display means. A fault display system is constructed by providing means for displaying information by changing the on/off duty ratio. [Function] By configuring the fault display method as described above, fault information for a large number of electrical components is displayed by system and classified according to the degree of fault, making it possible to accurately judge the urgency of troubleshooting. It's easy,
This is possible at low cost. [Example] Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 is a diagram showing the appearance of a fault display device to which a fault display method according to the present invention is applied. In the figure, 111-122 correspond to indicator lights 311-322 of the display device shown in FIG. 131-1
Reference numeral 40 indicates a warning light that indicates a failure of an electrical component classified by system based on the degree of failure. (1) Air conditioner system warning light 131 Compressor magnetic clutch, idle correction solenoid valve, heater mode solenoid valve, blower motor, internal/external air switching valve, (2) Wiper mirror system warning light 132 Electric remote control mirror motor, electric remote control mirror solenoid , wiper motor, washer motor, rear window defroster, (3) Cruise system warning light 133 Auto cruise control valve, auto cruise control unit, (4) Battery starter system warning light 134 Starter magnet switch, regulator (5) Engine System warning light 135 Radiator fan motor, fuel pump, fuel cut-off solenoid (6) Headlight system warning light 136 High beam headlight right, high beam headlight left, low beam headlight right, low beam headlight left, (7) Horn light System warning light 137 Horn, turn light, side light, tail light, back light, license light,
Stop light, (8) Control system warning light 138 Various EGR system solenoids (9) Door system warning light 139 Power window motor, door lock actuator, (10) Height control system warning light 140 Compressor, exhaust solenoid valve, tank solenoid valve , rear solenoid valve,
Front solenoid valve. Note that EGR above refers to exhaust gas recirculation.
This is a device that recirculates part of the exhaust gas as an inert gas to the intake system to lower the combustion temperature of the engine and reduce NOx in the exhaust gas. Further, typical engine controls include fuel system control, ignition system control, EGR system control, etc., and here, EGR system control is targeted as an example. By configuring the fault display device as described above, fault information for a large number of electrical components can be classified and displayed by system, taking into account the degree of fault. FIG. 4 is a diagram showing the external appearance of a fault display device showing another embodiment, in which the upper indicator lights 111 to 122 and the lower electrical component warning lights in FIG. 1 are combined to form one each. It is configured to display using indicator lights 211-215 and 218-222.
Here, the indicator lights 213, 218, 221, and 222, which perform displays in which the warning display and the fault display are related, display the warning display and the fault display by superimposing them with the same display character or pattern, so that the warning display and the fault display are related. Indicator lights 211, 212, 2 that display the
Nos. 14, 215, 219, and 220 display a warning display and a fault display separately at the top and bottom, respectively. In the above fault display device, the identification method when displaying a warning display and a fault display in combination is explained in the fifth section.
This will be explained based on the diagram. This figure is a diagram showing the blinking state of each indicator light in FIG. 4. In the figure, 251 indicates a state in which the indicator light is extinguished, that is, a state in which there is no display and no fault display or warning display is displayed, and 252 indicates a fault display that repeatedly lights up for a short period of time.
Reference numeral 253 indicates a state in which a warning display is superimposed with a fault display in which the light is repeatedly turned off for a short period of time for a long lighting period, and 254 indicates a state in which the warning display continues to be lit. Such changes in the duty ratio for turning on and off the indicator light are performed by a program of the control device, as will be described later. FIG. 6 is a block diagram showing the configuration of a control device for displaying a fault on the fault display device. In the figure, 11 is a transmission line for transmitting digital multiplexed signals, 12 is a serial signal transmission module, 13 is a serial signal transmission module, 14 is an output peripheral interface adapter (PIA), and 15 is an input peripheral interface adapter (PIA). ), 16 is a drive circuit, 17 is an input circuit, 18 is an indicator light for indicating various faults (corresponding to the above-mentioned warning lights 131 to 140 or indicator lights 211 to 222), and 19 is a signal input section for various switches, etc. . Fault information on various electrical components sent through the transmission line 11 is taken into the central processing unit 14 through the serial signal receiving module 12, classified into systems according to the degree of fault, and sent to the output peripheral interface adapter 14 and the central processing unit 14. Fault indicator light 18 through drive circuit 16
to be displayed. Further, electrical component failure information in the signal from the input unit 19 is input for each electrical component. Further, the duty ratio of the display current waveform as shown in FIG. 5 is determined by software according to a program of the central processing unit 14. That is, the duty ratio is determined in advance by software according to the content of the alarm, and the content is set in a timer in the central processing unit 14 and output. If this is shown in terms of hard logic, it can be expressed as shown in FIG. As shown, the door lock signal is input to the OR gate, the OR gate output is input to one input terminal of the AND gate, and the timer output is input to the other input terminal. The timer outputs are timer outputs 1, 2, and 3 depending on the warning content, and by inputting the timer outputs 1, 2, and 3, a display current waveform as shown in FIG. 5 is obtained. It will be done. As mentioned above, by displaying fault information on electrical components, a single indicator light can be used to display faults using a flicker that changes the lighting duty ratio, compared to the conventional warning display that only turns off and lights on. This makes it possible to display them separately. In other words, intuitively, a conventional warning display lights up continuously, but if the light flickers and goes off for a short period of time, it indicates that a fault has occurred in the warning display, and the warning display lights up repeatedly for a short period of time. In the case of flickering like this,
It is shown that only a fault indication has occurred. As described above, a fault display can be determined based on the state of flickering, and a conventional alarm display can be determined to be a fault display without any discomfort based on the overall lighting time.
However, as mentioned above, the overlapping display of faults and warnings is
This does not apply to the direction indicator lights 216 and 217 shown in the figure. In addition, in the above fault display method, inputting fault information such as disconnection, poor contact, short circuit, etc. from various electrical components can be easily done if the current automobile wire harness is replaced with a digital multiplex transmission system. is possible, and it is also easy to collect such a large amount of fault information from each node to the display unit of the instrument panel through the multiplexing line, so a description of a specific example thereof will be omitted here. [Effects of the Invention] As explained above, according to the present invention, the following excellent effects can be obtained. Fault information for a large number of electrical components sent through the car's digital multiplex transmission line is displayed by system and classified according to the degree of fault, so when a fault occurs in an electrical component, for example, it is displayed. Is it an extremely serious problem that requires immediate attention, such as an engine problem, or something that is dangerous to drive, such as a horn/light system or headlight system, or something that prevents the engine from starting, such as a battery/starter system. It is possible to accurately and easily judge whether the vehicle is impossible, or whether the vehicle can be driven but requires repair. In addition, fault information for a large number of electrical components sent via digital multiplex transmission lines to multiple status display means that display the status of conventional electrical components is classified by system and according to the degree of fault, and the information can be turned on or off. Since the duty ratio is changed and displayed,
Since a conventional display panel can basically be used without the need for a special display, fault indication can be realized at low cost.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the external appearance of a display device to which the fault display method according to the present invention is applied, FIG. 2 is a diagram showing the external appearance of a conventional display device, and FIG. 3 is a diagram showing the display portion 3 of FIG. 2.
30, FIG. 4 is a diagram showing the appearance of another display device according to the present invention, FIG. 5 is a diagram showing the waveform of the display current of the indicator light, and FIG. 6 is a fault display control according to the present invention. FIG. 7 is a block diagram showing the configuration of a control device that performs this, and is a diagram showing the duty ratio determined by software in terms of hardware. In the figure, 111-122... Indicator light, 131-1
40...warning light, 211-222...indicator light.

Claims (1)

[Scope of Claims] 1. In a display method for displaying the status of various electrical components of an automobile by a plurality of status display means provided corresponding to the electrical components, various types of states other than those displayed by the plurality of status display means are provided. A plurality of fault display means are provided for classifying and displaying fault information on electrical components by system according to the degree of fault, and the fault information from the fault state detection means for the various electrical components sent through the digital multiplex transmission path is taken in and displayed. A fault display method characterized in that the fault display means is provided with a means for classifying and displaying each system according to the degree of fault. 2. In a display system that displays the status of various electrical components of a motor vehicle using a plurality of status display means provided corresponding to the electrical components, fault information of various electrical components other than those indicated by the status display means may be used to indicate failures. A display means is provided to classify the fault information into systems according to the severity and to display the fault information superimposed on the state display means, and the fault information from the fault state detection means of the various electrical components sent through the digital multiplex transmission path is displayed. In order to identify and display the imported fault information and other state information on the state display means, means is provided for displaying the fault information and other state information by changing an on/off duty ratio. This fault display method is characterized by: