JPS5826651A - Vehicle's defect display - Google Patents

Abstract

PURPOSE:To effectively use a display space by providing a combination controller with the feature of generating a defect signal and a signal of an operating condition of elements to be controlled and by alternatively displaying the contents of both signals by means of a central controller. CONSTITUTION:A central controller 6 receives signals of switches 1 and sensors 2 and diagnosis data and operating condition data of mounted controllers 4. The diagnosis data is stored in second- and hour-base address counters in RAM 6c while the operating data is stored in RAM 6c. Based on the stored condition signal and defect signal, the central controller 6 alternatively displays the operating conditions of elements to be controlled and contents of occurring defects. Hence, the display space on the display 7 may be effectively used and the driver informed of the contents of occurring defects.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle abnormality display device that detects and displays abnormalities in a control device provided in a vehicle.

In conventional vehicles, there is a device known as an OK monitor that detects insufficient oil μ, window lubrication fluid shortage, headlamp disconnection, coolant lamp disconnection, stopfung disconnection, charging system abnormality, etc., and displays W blue.

These inspection items were selected to be relatively easy to inspect and repair even for ordinary drivers, and were originally intended for ordinary drivers as a nine-warning device.

However, the latest vehicles are becoming increasingly electronic and complex, making it difficult to find the location of a failure. For example, recently, one or more control devices using microcomputers, such as a fuel injection control device, an ignition control device, an air conditioner control device, an automatic speed control device, etc., are installed on a single vehicle. Each of these control devices has a plurality of sensors and actuators, and uses the characteristics of a microcomputer to finely control the device according to a control program stored in a storage section built into each control device.

Even if an abnormality occurs in the control process of a complex control device equipped with a large number of sensors and actuators, it is difficult to recognize the abnormality if the degree of the abnormality is small.
In addition, there are various combinations of conditions that may be the cause, but in order to discover the true cause, it is necessary to diagnose the control device from the outside, and check the operation logic of the control system. The more complicated it gets, the less easy it becomes. Further, even if an abnormality occurs intermittently, it is not easy for a repair shop to discover and confirm the cause of the abnormality.

The present invention was developed in view of the above problem, and includes a plurality of control devices that perform control independently according to a predetermined control program, and a function of detecting control abnormalities in the control devices themselves and generating an abnormality signal. By centrally managing the generation of abnormal signals from the control devices in the central control system [&l:] and by displaying the contents of the abnormality on the display device in response to the generation of abnormal signals, it is possible to control the occurrence of abnormal signals from the control devices in the vehicle. The object of the present invention is to provide a vehicle abnormality display device that allows a vehicle owner (including the driver) to easily recognize the abnormality content of a specific control device in a centrally managed display. It is.

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is an overall configuration diagram showing one embodiment.

In FIG. 1, 1 is a switch group, and la is a command to the central control device 6 to selectively display the first diagnosis information, giving priority to other displays on the display device 7. the first diagnosis switch, 1'b
is a second diagnosis switch that issues a command to the central management device 6 to selectively display the second diagnosis information, giving priority to other display contents to be displayed on the display device 7. This first. The contents of the second diagnosis information will be described later, but in normal vehicles, the second diagnosis switch is a hidden switch that cannot be easily operated by the driver, and is usually not used for repairs or inspections. It is used only when the equipment for the purpose of service or repair is brought to a location such as a dealer for repair or inspection. S switch) issues a command to the central management device 6 to initialize the diagnosis information stored in the nonvolatile RAM 60, which is a main component of the central management device 6. 2 is a group of detectors, including a cooling water level μ warning switch 2a, a windshield oil level warning switch 2b1, a headlamp disconnection detection circuit 20;
．． Rear fan 1 disconnection detection circuit 2 (1, stop lamp disconnection detection circuit 2e.

They are installed in various parts of the vehicle, such as the steering unrotter switch 2f, the door open switch 2g, the ignition close switch 2h, the lighting switch 21, the battery voltage divider circuit 2j, and the interior temperature sensor (thermistor, etc.) 2. Analog or digital II! :*C
It converts it into a signal and provides information to the central control device 6V.

4 Hironei onboard control device group, engine comprehensive control device 4a, automatic speed control device #i1 (including vehicle speed warning control device) 4b
, an anti-skid control device Wt+c, an air conditioner control device 4d, etc. These control devices are connected to actuator groups and detector groups (not shown) necessary for accomplishing the objectives of each control device, collect information from these detector groups, and control that information. A microcomputer (not shown), which is the main component of the device, performs arithmetic processing, and a group of actuators is controlled based on the results. In addition, each control device 4as 4 bs 40.4 (each control device 4a, 41 which occurred in the process of control due to a part of the #disconnection debugtum in the lF1 control delogum), 40,4 (diagnosis V for each l It maintains information on the operating status and information on the operating status, and updates the central management device 6 and each control device 4a, 4b at an appropriate timing.
, 40, 4(l), the information is serially transmitted to the central control device 6 according to a fixed communication procedure via the data communication line 5.

For example, the engine integrated control device 4a includes a water temperature sensor (not shown), an intake temperature sensor (thermistor), an intake air amount sensor (potentiometer), an acceleration sensor, an oxygen sensor, and an engine crank angle sensor. , vehicle speed sensor, idle, 4/switch, 7/'L' throttle switch, air conditioner operating switch, starter operating switch, and neutral position switch are connected to a group of detectors that detect the operating state of the engine. , O information is input from these detector groups, and the information is processed by the microcomputer shown, which is the main component of the control device, to purify exhaust gas, improve drivability, improve fuel efficiency, and increase output. To optimize the fuel supply to the engine for the purpose of controlling the conduction time and timing of the start of conduction of the drive coil of the injector, which is an actuator (not shown) that injects fuel into the intake system of the engine (not shown), In addition, for the same purpose, information from various sensors is processed to control the ignition timing of an ignition device (not shown), and to control the ignition ability of the ignition device to a certain level over the entire rotation, and the ignition device is adjusted based on the results. Ignition carp (not shown) inside μ
Controls the timing of starting conduction and the timing of cutting off conduction. Further, in order to stabilize the engine speed at a constant value when the engine is idling, opening and closing of the intake valve is controlled by a suit motor, which is an actuator shown in the figure, for feedback controlling the amount of intake air according to the engine speed. In addition, this is done by duty-controlling the conduction time of a voltage switching pump O drive unit (not shown) to mix engine intake negative pressure and atmospheric pressure at a duty ratio to create an appropriate negative pressure. The amount of intake air may be adjusted by an air switching pulp (not shown) that controls the amount of intake air using negative pressure.

In the process of control, this engine comprehensive control device diagnoses the operating states of various voltage detectors and actuators connected to the engine control device, as well as the operating state of the control device's own circuits, and determines whether they are normal or abnormal. data is retained. Also, based on the information from the detector, data on operating conditions such as engine rotation speed are held, and at an appropriate timing, data is sent to the central control device 6 in series via the data communication line 5 according to a predetermined communication procedure. Send those data according to the following.

Reference numeral 5 denotes a data communication line group that connects the central pipe embedded [6] and other vehicle-mounted control device groups 4. 6 is a central management device, CPU, R
1-chip microcomputer 6a, A/D converters 6b1 and 0, consisting of OM, RAM, 10 circuit parts, etc.
The nonvolatile RAM 60 of MO8 is the main component, and control command information is input from the input port of the microcomputer 6a to the central control device 6 of the switch group 1, and each of the vehicles in which the detectors are installed from the detector group 2 is input. It inputs information on the state of the parts, receives serial data communication from other on-vehicle control devices 4, and transmits that information to the microcomputer 6a.
It performs arithmetic processing to create various display information, stores it in the RAM, selects data to be displayed from among the stored various display information, and controls the display device 7 to display them. In addition, necessary display information stored in RAM is non-volatile RAM that retains its memory even when the power supply is disconnected.
It is stored in C.

The storage contents of this non-volatile RAM 6G are as shown in Table 1, and this non-volatile RAM 6eoA mainly contains diagnostic abnormality information and concentration information sent from each control device 4a, 4'b, 40.4d. Diagnosis abnormality information of the management device 6 itself is stored, and area B stores ON monitor information, switch information, and each control device 4a, 4b, 40.
, 4d, operating information, fluctuation voltage, room temperature, etc., and a tempo free gator to be ordered in the arithmetic processing process are stored.

Note that the contents stored in area B may be erased by turning off the ignition S/B switch.

In addition, the A/D:z converter 6b inputs the analog voltage generated from the battery voltage voltage divider circuit 2j1 and the room temperature detection circuit (using +-mi, Then, the digital information after le conversion is provided to the microcomputer 6a in response to a request from the microcomputer 6a.

Reference numeral 7 denotes a display device, which includes a display device 7a for displaying characters, numbers, etc. that corresponds to display commands from the central control device 6;
7b display, for example, to display letters or numbers, there is a Pufun tube display, electro J&/minescence gray (EL), liquid crystal display (
LO), gas sound emitting T'IZ7''V-(GO), fluorescent tube display, light emitting diode display (LED
) etc. can be used. Also, Llli as a hump
2D, white Wt bulb, gas discharge tube, etc. can be used. 8 is a buzzer that receives a buzzer electromotive signal from the central control device 6 (
The central control device 6 is equipped with a buzzer-driven function (on/off) to issue a warning to the driver.

The power supply section of the centralized management device 6 receives DC power from the patch 910 and generates a constant voltage.

Reference numerals 9a and 9b are constant voltage circuits of the central control device 6, which supply a constant voltage (both constant voltages of 5V) to the central control device 6 from the vehicle-mounted battery 10. First constant voltage circuit 9ati/
It is directly connected to the stem 910, and always supplies a constant voltage to the non-volatile RAM 60 in the central control device 6, keeping this non-volatile RAM GC in a constantly energized state and retaining the memory even when the ignition switch 9C is turned off. Also, when the ignition VB switch 9C is turned on, the second constant voltage circuit 9b connects the battery lO to the ignition switch 9C.
1 diode 9f, and supplies a constant voltage to other parts of the central tube m device 6 except for the nonvolatile RAM 6C. In addition, even if the ignition switch 9C is off, if the door switch 9 (1 (switch turns on when the driver's door opens) is on), the fungistor 9θ is in a conductive state, and the second constant voltage circuit 9b is connected to the battery 10. PNP) Tunjista 98. It is activated by power supply via diode 9g.

Next, the operation in the above configuration is illustrated in the display explanatory diagram shown in FIG. 2, the operation flow chart in FIGS.
The timing chart shown in Figure 4, and Figures 11 and 1
This will be explained with reference to the g/rear μ data configuration diagram shown in FIG.

In nine vehicles equipped with components 11 to 1o in Figure 1,
When the key switch 9C is turned on at the start of operation, or when the driver's door is open even if the key switch 9C is off, a constant voltage is supplied from the battery lO through the second constant voltage circuit 9b, and the electricity is supplied to each part. The system becomes operational. The microcomputer 6a is activated by receiving the stabilizing voltage from the second constant voltage circuit 9b, and executes the arithmetic processing of the control program at a period of approximately several lQQmBeo.

That is, the arithmetic processing is started from the start step 100 in FIG. 3, and the process proceeds to the initial setting step 200, where the registers, counters, latches in the microcomputer 6a, and some storage in the RAM are required to start the arithmetic processing. Set to the initial state.

This initial state setting operation includes resetting the monitor flags of each OK monitor item, which will be described later, initializing the unria μ data reception routine, and each control device 4a.

4b, 4C14d operation data initialization work, etc. are included. However, at this time, only the control device [114a, 4b, 4c, 4d (7)/iagutsis information] stored up to that point is not affected by Hiroko's initial setting operation.

In addition, the check code data in the check code area in the nonvolatile RAM 6C (if constant voltage power has been continuously supplied to the nonvolatile RAM 6C since the last time the ignition switch 900 was turned on, the nonvolatile RAM 6C is This method simultaneously checks the data indicating the validity of the non-volatile RAM 6C written in the RAM 60 and other data in the non-volatile EAM 60, and if the reference result differs from the expected value, the data is set to the non-volatile RAM 6C. Only after voltage power is supplied, the ignition switch 90 is turned on. During Lfi, it is determined that constant voltage power is supplied to the entire management device 6, and the non-volatile RA
M6C! All data within is determined to be invalid and initialized.

After this initial setting, information detection lS (switch group, detector IF
) Proceed to routine 300. This information prosecution routine 300
So let's move on to the first part. Second diagnosis switch 1a%lb
, the first one corresponds to the on/off state of the S switch 1c.
1 Set/reset the second diagnosis switch bladder and S switch flag. In addition, the on/off state of the cooling water level warning switch 2a1 and the window washer fluid level warning switch 2b in the detector group 2 is detected to determine whether or not there is a shortage of cooling water and window washer fluid. The flags for insufficient cooling water and window washer fluid are reset/set. or,
Detects high/low output voltages of the headlamp #R line detection circuit 20, rear lamp disconnection detection circuit 2d1, and stop lamp disconnection detection circuit 2e, determines disconnection/continuity of the headlamp, rear lamp, and stop lamp, and sets each lamp disconnection flag. / Resen F. Also, by detecting the on/off state of the ignition close switch 2h, the lighting switch 21, and the on/off state of the door open switch 2g, the ignition close switch 2h is turned off (open), the lighting switch 21 is turned on, and the door close switch 2g is turned on. It is determined that the three on (open) states have been established, and a flag indicating ``forgot to put on the phytochemistry'' is set for a certain period of time after the conditions are established. Also, the ignition close switch 211. Steering unlock switch 2f, door open switch 2g on/
Detects the off state and closes the ignition switch 2h
is off, steering unlock switch 2f is on (
It is determined that the door open switch 2g (key inserted state) is in the ON state, and after these conditions are met, a "KEY forgotten" flag is set for a certain period of time. In addition, the battery voltage divider circuit 2j and the room temperature detection circuit 2
The output voltage of
Data on the battery voltage and room temperature are obtained based on the Lln number and stored in the RAM. After performing the above arithmetic processing, the process proceeds to the communication information processing section 400.

This communication information processing routine 400 dacodes the data received from each control device group 4 in the timer interrupt routine shown in FIG.
(Obtain diagnosis information and operating status information of l,
Based on that information, each control device 4a, 4'b, 4c, 4
(Performs data processing for i operation display and diagnosis information.

(The detailed calculation process is shown in FIG. 6.) The received data used in this communication information processing μm chip 400 will be explained below. Now, while the series of routines shown in FIG. 3 are being executed, the timer interrupt routine shown in FIG. When the serial data arrives at the receiving μm terminal 800, each control device is transmitted from the control device group 4 via the data communication line group 5 according to a predetermined communication procedure! 4a, 4b,
Diagnosis information and operation information data of 4c and 4a are sampled at appropriate timings synchronized with timer interrupts, and after performing arithmetic processing such as parity f-check to confirm the validity of the data, it is determined that the data is valid. When it is determined, the data is stored in the nonvolatile ktAM 60 for each communication line, and at the same time, the unprocessed data presence flag for that communication line is set. The structure of this V rear μ data is shown in FIG. 11. Data receptionッ-1000n8
The operation of 00 will be explained using the serial data reception timing chart shown in FIG. In FIG. 12, (1) indicates the timing of occurrence of a timer interrupt. (2
), (6) show the serial μ data of two data communication lines (hereinafter referred to as the first and second data communication lines) of the data communication line group 5.* (3) and (7) show the serial μ data of the first and second data communication lines. jl! 2
The data sampling timing of the data communication fin is shown below. (4) and (8) show the reset/set timing of the 7 puffer while receiving data indicating that the 11th and 2nd data communication fin is receiving the serial lv7'-event.

(5) and (9) are the first. Corresponding to the data communication fin of jlT2, set the unprocessed data flag indicating that the data received from each communication line has not yet been processed by the communication information processing routine 400 in the main μm circuit. The transmission rate of this serial data is 250 bits/second, and as shown in Figure 11, the start bit (ST) is low level and 1 bit (b
j-t) Data is positive logic, 8 bits, parity (P)
is 1 bit with even parity, and stop pitch (SP) is 1 bit with high level μ. It is at a high level when there is no data.

Next, the operation of this serial μ data reception routine 800 will be explained according to the timing chart of FIG. 12 and the detailed calculation process of FIG. 5. The arithmetic processing shown in FIG. 5 is for one piece of serially received data, and similar arithmetic processing is sequentially executed for other serially received data.

The data of the first and second data communication fins (Fig. 12 (2), (6)) in timing chart F shown above are data synchronized with the timer interrupt generation timing (Fig. 12 (1)). Sampling timing (Figure 12 (3), (
7))). Period 801 a.

801 BA misstart bit output period. During this period, the data communication fin is in a state of no data after one data communication has finished, and every time a timer interrupt occurs (I
The data of each data communication fin is sampled every mseC). This period is a period in which the data communication fin enters the high level p state after the previous data communication ends, and then finds the timing to change to the low level μ for the first time. Subsequently, during periods 802a and 802b, each data communication line is activated in synchronization with the second timer interrupt timing (after 2 msec) after a change in the level of each data communication line from high to low is detected during the start bit confirmation period. data is sampled, and if it is similarly low level at this time, it is determined that there is a true start bit (ST). Further, if the sampled value is a high level, it is determined that the previously sampled low level was noise, and the process returns to the state of 802a, 8021). and,
Following periods 802a and 802b, in V-real data reception periods 803a and 803b, the data of the first and second data communication fins are acquired at each timer interrupt generation timing of 4 times fi (4 msec) after the previous data sampling. Usually, only the number of data bits (8 data bits + 1 parity bit + 1 stop bit = 10 bits) is sampled. Checking the relationship between the 8 bits of data and the parity bit in the 10-bit data thus obtained (parity check) and the level of the stop bit, +(
High level lv) is checked, and if it is determined that reception has been completed normally, 8 bits of data is stored in RAM,
At the same time, unprocessed data communication fins corresponding to each data communication line are set at the timings shown in FIG. 12 (5) and (9). Please note that the data receiving flag is shown in Figure 12 (4).
, (8) As shown in K, the stop bit is sampled from the point where the start bit is first sampled, and then l[i
! It is set until the first timer interrupt occurs, and during this time, data is unconditionally sampled every fourth timer interrupt and the data is handled as communication data.

Based on the above-mentioned received data and the unprocessed data presence flag, the communication information processing μm processing 400 first enters the unprocessed data presence flag determination step 401 shown in FIG. At this point, the set/reset state of the unprocessed data flag for each communication line is determined, and if the unprocessed data flag is set and the determination is YES, the next diagnosis information and operation information are sent. Judgment step 402
Proceed to.

In this judgment step 402, information on the communication line side or the same communication line is classified into diagnosis and operation state information according to predetermined classifications depending on the data format, and if it is diagnosis information, it is decoded and the diagnosis information is decoded. The process advances to a storage routine 403, and if it is operational information, the process proceeds to an operational information decoding and storage routine 407. If the process proceeds to routine 407, the received data is decoded and stored in the RAM as information such as engine speed, autodrive operating state, speed winner operating state, etc., and then the process proceeds to step 408. In addition, when proceeding to ~-chin 403, the received data is decoded as diagnostic abnormality information, classified by each control device and by item, and stored in the non-volatile RA as shown in Tables 2 and 3.
Diagnosis information storage area in M6C (Table 2, Table 3
indicates groups 1 and 2 of diagnosis abnormalities; 1
Group is from address ADRt to ADR1+n% 2nd group is from address ADR1 to ADH! +n) for each diagnosis error item of each control device, set the corresponding diagnosis error flag in the diagnosis error flag group (110 section in the table) in group 1 and group 2 (110 section in the table).
110 part to 1). Then, the corresponding diagnosis counters are set to 0.

This diagnosis counter is set at a constant cycle (1 second for group 1, 1 second for group 2 VC) synchronized with timer interrupt V in the diagnosis abnormal reception branch elapsed time integration routine 1000 in the timer interrupt routine in FIG. The contents of the diagnosis counter whose diagnosis error flag is set to 1 are read into the microcomputer 6aK at
The value is again written to the counter at the address where it was previously stored. That is, the counter of l# or group 2 whose diagnosis abnormality flag is 1 is incremented by +l every second for l# and every hour for 2#. Therefore, the two-slope diagnosis counter indicates the elapsed time since the corresponding diagnosis abnormality item was last received, one in units of seconds and one in units of hours. In addition, (1), C), ( in Tables 2 and 3)
3) and (4) are associated with, for example, the engine ECU O&l item, the engine ECU item 2, the air conditioner ECU item 41, and the autodrive [CU item Aj.

Table 2 When this μm check 403 is completed, the process proceeds to an importance classification routine 404. In this μm check 404, the diagnostic reception data missed in the routine 403 is classified into two stages A/B according to the predetermined importance for each diagnosis abnormality item, and the next A/B judgment step 405 If it is classified as A, the process goes to flag Asen)/i/-chin 406. And this routine 4
At 064C, flag A is set and the routine advances to routine 40g. Further, if there are 8 classifications in the A/B determination step 405, the process proceeds to 11 to 408. This unasahi-buried data presence flag reset routine 408 is routine 403.4.
This is the reset μm flag of the unprocessed data presence flag corresponding to the received data processed in step 07. This /%/-Chia 40
After passing through 8, the process proceeds to Nutep 409 for determining the elapsed time after receiving the diagnosis signal. Further, if the determination in the first unprocessed data existence 7 pufferfish determination step 401 is No, the process directly proceeds to this determination step 409 .

Then, in this judgment step 409, the elapsed time from the reception of each item of the first group of diagnosis abnormalities shown in Table 2 is judged based on the value of the timer counter accumulated in routine 1000 of FIG. A certain period of time Tl (for example, 15
If more than 410 seconds have elapsed, reset the flag.
If the elapsed time is within T1, the process advances to /v-chin 400a in FIG. 3. And flag reset μ
If the process proceeds to m-chin 410, T is determined at decision step 409.
All diagnosis abnormality flags in one group determined to have passed one or more times are reset. Then, in the next judgment step 411, it is judged whether all the diagnosis abnormality flags of classification A in one group are reset, and if all are in the reset state, the process proceeds to μm check 412.
Reset flag A set in routine 4o6,
If even one is still in the set state, the process directly advances to the next determination step 413. In this judgment step 413, 2#
The diagnostic reception wave elapsed time corresponding to the flag set in Then, the process proceeds to the 2# flag reset μm check 414, and if it is within 72, the process directly proceeds to the routine 400a in FIG.゛Also, routine 41
If the process advances to step 4, all the 7 puffer fish in the second group for which it was determined in determination step 413 that 72 or more have passed are reset, and the counting operation of the corresponding counter is disabled. Then, the process advances to the next μ-chin 400a.

Then, the self-diagnosis process μmm non-0 shown in FIG.
At 0a, self-diagnosis of the Higashi-Nakafubu equipment f6 is performed according to a predetermined determination standard. In other words, under certain conditions of the input signal line to the central control device 6, the original repp or 1d within a certain period
The microcomputer 6 of the central management device 6
If the input signal is outside the standard, it is determined that there is an error tζ somewhere in the input system of the input signal, and the diagnosis error information is stored in the non-volatile RAM 5C and sent to other control equipment*4.
a.

It is stored in the same way as the diagnosis abnormality information transmitted from 4b, 40, and 4d. In addition to this self-diagnosis, it is also possible to check the program ROM of the microcomputer 1cj) by monitoring the output signal with a separate circuit, or to check the RAM when the power is turned on.

Following the final μm change 400, the process proceeds to a determination step 500yc.

In this judgment step 500, the information on the engineering S switch IC inputted by the μm switch 300 is judged by the engineering S switch flag, and if the engineering S switch flag is set, the process passes through the diagnosis information initial setting routine 1100 and returns to the initial setting routine 200. ), and if it is a reset, the process advances to the next display item selection routine 600. And routine 1.10
If it progresses to 0, the diagnosis error information 18
．． All abnormality flags of the second group are reset, and flag A is also reset.

Furthermore, when proceeding to the display item selection routine 600,
Based on the information input in the routine 300 and the routine 400, items to be displayed on the display device 7 are selected according to a predetermined display priority order, and the contents of the nine selected items are stored as an instruction command to the display device 7. Set in the display command register to be used.

This display command includes a command to turn on the warning light and a command to turn on the buzzer, and these commands to turn on the warning light and the buzzer on can be executed in parallel with the display command for the selected display item. This display item selection routine 600 will be explained with reference to the detailed flowchart of FIG.

When entering this display item selection routine 600, first flag A is selected.
Proceeding to step 601 to determine the value of /V-chin40
6. Check flag A that is set/reset at 412, and if it is set, it is determined that a diagnostic abnormality of high importance is currently occurring in some control device,
Proceeding to warning light lighting command μm 602, a warning light display command for lighting a warning light to urge the driver to promptly make repairs is set in the display command register. Also, if flag A is checked and reset, it is determined that no diagnostic abnormality of high importance has occurred in the vehicle O all V stems at this time, and the process proceeds to the warning light extinguishing routine 603 to extinguish the warning light. Set the lights-off command to the display command register. The process then proceeds to determination step 604a in which the next first diagnosis switch flag is determined.

In this judgment step 604λ, the above-mentioned! -Chin 300
The value of the diagnosis switch flag of jgl that is set/reset is determined, and if it is set, it is determined that a request to display the diagnosis information of Ml has occurred, and the first diagnosis y display command is issued. 605a
In this first diagnosis display command routine 605a, the code for distinguishing the control devices as shown in FIG. 2 (1), (2), and (3) and the respective control devices 4a, 4b,
In order to display a combination of item codes for distinguishing between 4G and 4d diagnostic abnormalities on the display device 7Vc, a display command corresponding to each display is set in the display command register. The code that distinguishes this control device is shown in Figure 2 (1).
e), E/G (engine control p) as shown in (3)
-)), A/C (air conditioner, troller), gsc
(skid controller), and A/D (not shown)
(auto drive controller) etc. The diagnosis abnormality classification code for each control device 4a, 4b, 4c, and 4d is expressed in Arabic numerals such as "ol" r02J rill. The detailed arithmetic processing of this first diagnosis display command routine 605a is performed in the eighth
As shown in the figure.

If there are multiple diagnosis abnormalities for the above-mentioned nine operations, display commands are issued at regular intervals (for example, 2 seconds) in order of the lowest address number in one group, that is, according to a predetermined priority order. Rewrite komashito to cyclic. Furthermore, if there is no diagnostic abnormality item to be displayed in one group, simply use "OK" to indicate that there is no abnormality.

Next, in the determination routine 604a, the determination is N.

In this case, the process advances to determination step 604'b in which the next second diagnosis switch flag is determined. In this judgment step 604b, the value of the second diagnosis switch flag set/reset in the routine 300 described above is judged, and if it is set, the value of the first and second diagnosis information (group 1, group 2) is determined. It is determined that a display request has occurred and the second diagnosis display command routine 60 is executed.
Proceed to 5b, this diagnosis command μm Chin 6
05b, a code for distinguishing the control devices as shown in FIG. 2 (1), (2), and (3) and each control device 4a, 4b.

Display commands corresponding to each display are set in the display command register so that the display device 7 displays a combination of item codes that distinguish the contents of the diagnosis abnormality of 4C14α. In addition, for items for which the abnormality flag is set for both the 1st and 2nd groups, it is determined that the abnormality is continuing, and the hump 7b used as a warning light is lit at the same time as the diagnosis abnormality item display. A warning light lighting command is also set in the display command register, and abnormalities that are currently occurring and abnormalities that have occurred in the past are distinguished and displayed by lighting/extinguishing the warning light. In this case as well, for multiple diagnosis abnormalities, the first diagnosis display command routine 605a
Similarly to the calculation process, the display is cyclically rewritten at a fixed period (for example, 2 seconds). Therefore, the user can prepare a correspondence table between diagnosis abnormality item codes and abnormality contents and use the diagnosis abnormality contents as an information source for knowledge and trouble repair.

When determining this error code, it is desirable to use the same error code even if the lane is different if the error content is the same, and it is desirable for troubleshooting to classify and assign codes to some extent depending on the error content. . Next, when the determination in the second diagnosis switch flag determination Stella 7'6041) is NO, the process proceeds to determination step 606 in which it is determined whether or not there is a display item of the OK monitor which has the next display priority of 1-. .

In this judgment step 606, all values of the flag group of each OK monitor item set/reset in the information search routine 300 are judged, and if one or more of them is set, it is judged that there is an OK monitor display item. Then, the process advances to the OK monitor display command routine 607. In this OK monitor display command μ-ten 607, the contents of the abnormality that should be warned to the driver as an OK monitor are set in the OK monitor abnormality Buddha set in the information search routine 300 as shown in FIG. 2 (5). , (6), (7), (8), and (9), a display command corresponding to each display is set in the display command register so as to display words in alphabetic or katakana characters. In addition, if you forget to remove the key,
When setting the display command for L Engineering GHT SWJ in the display command register, also set the buzzer-on command at the same time.

The display command registers for this "GKEYJ" GHT SWJ and the buzzer on should be set for a certain period of time (for example, 10 seconds).These two items can be set by turning off the ignition key switch 9C and opening the door. Since a warning is generated when the driver attempts to exit the vehicle, a buzzer is also used to attract the driver's attention.Also, if there are multiple OK monitor items to be displayed, the first diagnosis display command routine 605a Display commands are cyclically rewritten at a certain period (for example, 5 seconds) like arithmetic processing.Also, if it is determined in judgment step 606 that there are no OK monitor items to display, the next display priority order of auto drive and speed up is executed. The process advances to determination step 608 in which it is determined whether or not the owner's operation is displayed.

In this judgment step 608, the operating information of the auto drive and the operating information of the speed winner processed by the communication information processing/L'-chin 400 are judged, and if there is information that either one is operating, the operating information of the auto drive or the speed winner is determined. Proceed to owner's operation display command 609. In this autodrive/Speedwinner operation display command routine 609, a display is displayed according to the operating state of the H, t-drive, or SpeedWoner, whichever is determined to be currently operating. 10), (11), (12),
In order to display as shown in (13), a display command corresponding to each display is set in the display command register.

In the display example, [AUTODRIVEJ is an operation display indicating that vehicle speed control is in progress], rA/D 10100K is currently in the canceled state, but the vehicle speed set for vehicle speed control has already been set, and the resume switch (not shown) is shown. This represents an operating state in which control can be started for automatic operation at a speed of 1100 K/h by pressing . l-A/D MA
"N" indicates that the vehicle speed control device 4b is in an operating state where the main power supply is simply turned on.

[57vt 6oKMJ indicates that the lower limit vehicle speed at which the vehicle speed warning device operates and issues an alarm is set to 5QKM/h4C, and the vehicle is currently traveling below that set speed. This indicates that the vehicle speed exceeds the set vehicle speed and gives a warning to the driver by blinking. (Does not explain details about this feature) Also,
When it is determined in the determination step 60g that the auto drive and speed winner are not operating, the process advances to the next determination step 610, which determines whether or not to display the engine speed, which is the display priority.

In this determination step 610, whether or not the engine is rotating is determined based on the engine rotation speed information processed by the communication information processing μm switch 400, and when it is determined that the engine is rotating, a carrot rotation speed display command μm switch 611 is sent. Then, a display command corresponding to the display of the engine rotational speed processed by the μm chin 400 as shown in FIG. 2 (14) is set in the display command register. Also, judgment routine 6
If it is determined in step 10 that the engine is not rotating, the process advances to μm control 612, which commands display of battery voltage or room temperature, which is the last display priority.

This display command routine 612 is the information search routine 300.
The battery voltage and room temperature information entered in Figure 2 (15)
, (16), a display command corresponding to each display is set in the display command register. The display commands 605a, 605b, 607.609.61 mentioned above
After executing the routines 1 and 612, the process advances to the next display control routine 700 shown in FIG.

This display control routine 700 sends a character display and warning light lighting command to the display device 7 according to the display command set in the display command register in the display item selection routine 600 described above, and also sends a command to the buzzer 8 to display a character and turn on a warning light. Sends a buzzer activation signal. The calculation process of this routine 700 will be explained according to the detailed calculation flowchart shown in FIG. First, when this routine 700 is entered, the process proceeds to a step 701 for determining the presence or absence of a buzzer activation command, and the process proceeds to a routine 702 that refers to the buzzer activation command flag in the display command register and turns on the buzzer drive transistor if the flag is set. If the buzzer activation command flag has been reset, the routine proceeds to routine 703 for turning off the buzzer drive transistor. After this ~-chin 702 or 703, a transmission data presence/absence flag determination step 704 follows. This transmission data presence/absence flag is a flag for indicating that the data in the y real data transmission buffer has not yet been transmitted to the display device 7. If this flag is set, the arithmetic processing of this routine 700 is ended without doing anything. However, if the transmission data presence/absence flag has been reset, the process advances to μm register 705, and a character code string (for example, "HEAD In the case of a LAMPJ display, an 8-bit character code is provided for each character string) and a 1-digit data code that instructs the display to blink and the warning light to turn on/off is stored in the transmitting puffer register. Then, in the subsequent routine 706, the transmission data flag is set, and the digit counter and bit counter used in the serial data transmission routine 900 are determined.
). Then, the arithmetic processing of the μm chip 700 is completed, and the process returns to the information inspection routine 300 according to the flowchart in FIG.

Next, regarding the data transmission routine 900 in the interrupt routine of FIG. 4, the detailed calculation flowchart of FIG.
The explanation will be made according to the serial data transmission timing chart in FIG. 14, and the configuration diagram of serial transmission fn data in FIG. j4! , In Figure 13, (1) is a timing chart of the transmission data block, and as shown in the figure, 5
TX (Start of Text) code, N character codes from Data 1 to Data N (one of which is a command data suite for display blinking and warning light on/off), and ETX (Start of Text) code in order. Indicates the timing of serial transmission. (2) in the figure is a transmission data presence/absence flag, and when the first timer interrupt occurs after this flag is set, the STX code starts to be transmitted.

Further, the transmission data flag is reset at the same time as the transmission of the ETX code is completed. Also, (1) and (2) in Figure 14
), (3), (4), and (5) are enlarged data transmission timings in Figure 13 (timings for the number of digits of transmitted data), and (1) shows the timer interrupt generation timing for every lm5ec. . Further, (2) indicates transmission data. (
3) shows the timing for decrementing the digit counter by one, which will be explained in FIG. (4) shows the timing of decrementing the bit counter by one, which will be explained in FIG. 10, and this is in synchronization with the occurrence of a timer interrupt while the transmission data presence/absence flag is set. (5) shows the bit counter set timing explained in FIG. 10, which occurs when the digit counter is not yet 0 after transmitting the character code for #'i one digit (including the header). Furthermore, the first
FIG. 5 shows the structure of one digit of this serial transmission data.

The transmission speed of this serial transmission data is 1000 bits/
Start bit (level low) 1 bit, data 8 in seconds
It consists of a bit (positive a filling), 1 parity bit, and 1 stop bit (level high). In FIG. 10, when the data transmission routine 900 is entered, the process first proceeds to a transmission data presence/absence flag determination step 901, in which the value of the transmission data presence/absence flag is determined. If the flag is reset, the arithmetic processing of the y-chin 900 is immediately terminated; if the flag is set, it is determined that there is display data to be transmitted, and the process proceeds to the next p-chin 902.

The conor routine 902 reads the value of the bit indicated by the digit counter in the transmission buffer register and the bit position counter (bit counter) of each digit from the transmission buffer register, and sets the transmission output signal to high or low level according to the value. Ru.

Then, the process advances to the next step 903, and the value of the bit counter is decremented by one. The value of this bit counter is then determined.Proceeding to determination step 904, it is determined whether or not the value of the bit counter is 0. If not, the calculation process of this bit counter 900 is terminated. If so, the process advances to the next digit counter subtraction routine 905 and decrements the digit counter by one. Then, the process advances to judgment step 906 to judge the value of the next digit counter, and if the digit counter is 0, routine 9
The process advances to step 07 to reset the transmission data presence/absence flag. If the value of the digit counter is not 0, the routine proceeds to routine 908 in which the bit counter is set to a determined nine value. That is, in this data transmission routine 900, while the data presence/absence flag is set, each time a timer interrupt occurs, the display character code set in the transmission buffer register is read one bit at a time, and the corresponding bit is read out. The transmission output is set to high/low level μ, thereby transmitting V real data to the display device 7.

In addition, in the above embodiment, when a plurality of abnormality responses occur in each control device, the display is switched on the display 7a. The content of all abnormalities may be displayed.

Furthermore, when an abnormality occurs in the control device, the contents of the abnormality may be immediately displayed on the display [7].

As described above, in the present invention, a plurality of control devices independently perform control according to nine predetermined control programs. Equipped with a machine vIA that detects and generates an abnormal signal by the Guhum, the occurrence of abnormal itA from these multiple control devices is centrally managed by the central control device m, and in response to the generation of the abnormal signal, the abnormality occurrence details are Since it is displayed on the display device, multiple controls are available for the vehicle! ! The operator of the vehicle can be made aware of the content of abnormality in a specific control device among the plurality of control devices, and furthermore, a status signal can be sent to a specific control device among the plurality of control devices according to the operating state of the controlled part. The central control device is provided with a function to generate a state display signal based on this state signal and an abnormality display signal based on the abnormality signal. There is an excellent effect that the display space of the display means can be used effectively by displaying the content alternatively.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram showing one embodiment of the present invention, Fig. 2 is an explanatory display diagram for explaining the operation, and Figs. 3 to 10 are calculations by the control program of the microcomputer in Fig. 1. FIG. 11 is a block diagram showing the structure of serial reception data, FIGS. 12 to 14 are timing charts for explaining the operation, and FIG. 15 is a block diagram showing the structure of serial transmission data. . 1 - switch group, 2 - detector group, 4 - control device group, 6
・I middle management device, 6a-microcomputer, 7-display device. Figure 3 Figure 4

Claims (1)

[Scope of Claims] (1) In a nine-vehicle vehicle equipped with a plurality of control devices that independently control each control target part of the vehicle according to a predetermined nine-control program, the plurality of control devices are provided with control abnormalities of the control device itself. In addition to having a function to detect and generate an abnormal signal, a specific control device is also provided with a function to generate a status signal according to the working status of the controlled part, and the status signal from this specific control device is At the same time, the presence or absence of an abnormality signal from the plurality of control devices is centrally managed for each control device, and an abnormality display signal corresponding to the occurrence of the abnormal signal and a status display signal based on the condition 1 signal are generated. A central control device that selectively generates the control device, and a central control device that displays the operational width of the controlled part when a status display signal is generated from the central control device, and displays an abnormality occurrence response when an abnormality display signal is generated. An abnormality display device for a vehicle, which is equipped with a display device that is displayed indoors. 2. The vehicle abnormality display device according to claim 1, wherein the abnormality display device for a vehicle generates an abnormality signal indicating the location where the plurality of control device abnormalities have occurred. (3) The abnormality display device for a vehicle according to claim 1 or 2, wherein the central management device stores abnormality signals from a plurality of control devices for each control device. (4) The abnormality display device for a vehicle according to any one of claims 1 to 3, wherein the central control device generates an abnormality display signal preferentially with respect to the status display signal. (5) The display device displays, on the same display screen, a symbol for instructing the upper control device and a symbol for indicating the location of the abnormality in response to the abnormality display signal from the central control device.
The vehicle abnormality display device according to any one of items 1 to 4.