JP2010138792A - Vehicle control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle control device for storing the occurrence frequency of such engine starting failures that troubles of specified components and systems cannot be specified, with respect to each engine cooling water temperature, for re-verifying less-repeatable troubles specifically, and for allowing a designer to seize in how conditions the occurrence frequency is higher. <P>SOLUTION: The vehicle control device performs data processing for storing temporal data. Particularly, it performs data processing when accumulating data for history information about the operating conditions of a vehicle and an engine and information over a certain elapsed time for the failure diagnosis of the vehicle. It also carries out analyzing methods using the data processing. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle control device, and more particularly to a vehicle control device that stores and acquires failure analysis data using a failure diagnosis function.

In recent years, domestic and foreign exhaust gas laws and regulations have become stricter year by year, and accordingly, demands for fault diagnosis (OBD: On Board Diagnostics) in vehicle control devices (on-vehicle electronic controllers: ECUs, etc.) have also become stricter.
In the basic failure diagnosis, when the traveling state of the vehicle satisfies a certain condition, the input / output of the vehicle control device is monitored to determine whether it is normal or abnormal. If it is determined that there is an abnormality, a fault code (DTC) that identifies which part or system is abnormal and a running state when the fault determination is performed are stored in a data holding memory (EEPROM). Or RAM backed up by battery power).

Conventionally, in a vehicle failure diagnosis control device, when a set condition is satisfied, a determination function for determining a start-up failure including engine stall or engine start failure and a start-up time when a start-up failure is determined Some have a data storage function and can reduce repair time.
As a failure diagnosis method for an internal combustion engine, there is a method in which an operation time of the internal combustion engine or a physical quantity related to the operation time is integrated to know a physical quantity such as a time until the failure occurs.
Some vehicle control devices can limit the number of times the nonvolatile memory is rewritten to store the number of vehicle operations and the number of times of failure diagnosis to less than the guaranteed number of operations without increasing the storage capacity of the nonvolatile memory. .
JP 2004-44407 A Japanese Unexamined Patent Publication No. 63-167059 Japanese Patent No. 3991963

By the way, in the fault diagnosis program in the current vehicle control device, although a failure of a large number of parts / systems is considered as a factor due to an engine start failure or the like, a fault code for identifying the fault content and a running state at the time of the fault Since the function that can store the data is limited to the failure of a specific system or part, if the part / system cannot be specified, it is not determined as a failure.
The engine start failure is a serious failure for the customer, but it cannot be determined as a failure. After the vehicle is brought to the repair shop, the repair shop must re-examine the trouble to understand the situation. Don't be. In general, engine start failure often occurs only under special conditions, and this re-verification is time-consuming and requires a lot of man-hours / inconvenience for both repairers and customers.
Further, in many cases, a failure of a vehicle brought into a repair shop by a customer cannot be diagnosed by an existing failure diagnosis program and a failure code does not remain. If these symptoms can be reproduced immediately, failure diagnosis by the operator is possible, but failure analysis with low reproducibility makes it extremely difficult to analyze the cause of the failure. In Reference 1, the second failure code (symptom-based) is newly established, so that the symptom base such as engine stall and engine start failure (the above-mentioned “current failure diagnosis program cannot be diagnosed and no failure code remains) It is possible to save data related to defects (corresponding to “case”).
However, in the analysis of defects with low reproducibility, the situation under which the problem occurred, in particular, the engine cooling water temperature state, is the point in the problem analysis. There was an inconvenience that sufficient data could not be stored.

  Accordingly, the object of the present invention is to save the frequency of engine start failures that cannot identify a specific component / system failure according to the engine coolant temperature, so that even a problem with low reproducibility can be targeted. Another object of the present invention is to provide a vehicle control device that can be re-verified, and that allows a designer to grasp under which circumstances the frequency of occurrence is high and to examine preventive measures.

  The present invention has a storage area and a plurality of counter functions. In this counter function, an increment process is performed to increase each counter corresponding to the establishment of a predetermined condition, and the count value increased by the increment process is calculated. In the vehicle control device stored in the storage area, a plurality of first counters having upper limit values equivalent to each other corresponding to variations in driving conditions are provided, and another second counter related to the plurality of first counters is provided. A counter is provided, and when the predetermined condition is satisfied, each of the first counters is continuously incremented by one unit based on the result, and the increment process of the first counter is continued according to the operation over time. And when one of the plurality of first counters reaches an upper limit value In addition to performing a two-dividing process that substantially halves the first counter that has reached this upper limit value, the second counter is continuously incremented one unit at a time based on the results of performing the two-dividing process, Simultaneously with the increment processing of the second counter, the two counter processing of the first counter other than the first counter that has reached the upper limit value among the plurality of first counters is performed, and thereafter, According to the operation, the increment process of the second counter is continuously performed.

  The vehicle control device according to the present invention stores the frequency of occurrence of engine start failure for each engine coolant temperature so that a failure of a specific part / system cannot be specified, and re-focuss even if the problem is low reproducibility. Verification can be performed, and the designer can grasp under which circumstances the occurrence frequency is high.

This invention can be re-verified with a focus even if it is a problem with low reproducibility, and the designer should understand under what circumstances the occurrence frequency is high and examine preventive measures Is realized by storing the frequency of occurrence of engine start failure such that a failure of a specific part / system cannot be specified for each engine coolant temperature.
Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings.

1 to 10 show an embodiment of the present invention.
1 and 2, reference numeral 1 denotes a vehicle. This vehicle 1 is equipped with an engine 2 and a communication diagnosis system 3. The communication diagnosis system 3 includes a plurality of, for example, a first vehicle control device 4A, a second vehicle control device 4B,... As a vehicle control device 4, and a failure diagnosis device (failure diagnosis tester). 5 is provided apart from the vehicle 1.
The first vehicle control device 4A, the second vehicle control device 4B,... Are connected to each other via a vehicle side communication line 6 capable of serial communication and bidirectional data communication as communication lines. The control object is controlled while performing transmission / reception of. A vehicle-side connection connector 7 is provided on the vehicle-side communication line 6.
The failure diagnosis device 5 is connected to any one of the plurality of vehicle control devices 4, and rewrites a program of one vehicle control device or trouble diagnosis (OBD) of the vehicle 1 or engine 2. : On Board Diagnostic).
The failure diagnosis apparatus 5 is provided with a display 8 and is connected to an out-of-vehicle communication line 10 that is a communication line provided with an out-of-vehicle connector 9 that can be coupled to the vehicle side connector 7. The vehicle communication line 10 can be connected to the vehicle communication line 6.
The first vehicle control device 4A and the second vehicle control device 4B have the same structure. Here, only the second vehicle control device 4B will be described as follows.

The second vehicle control device 4B includes, for example, a plurality of vehicles such as a body control module (BCM), an engine control module (ECM), a transmission (A / T) controller, an ABS (anti-lock brake system) controller, and an air bag controller. Control device (in-vehicle electronic controller: electric control unit (ECU)) and has a failure diagnosis function (self-diagnosis).
As shown in FIG. 1, the second vehicle control device 4 </ b> B inputs a signal from a communication port 11 that is a receiving means connected to the vehicle-side communication line 6 and a signal from the vehicle-mounted sensor 12 to perform waveform processing and a communication port. An input processing device 13 that outputs to 10 and a communication port 11 that calculates the optimum control amount for the target control based on the signal from the input processing device 13 and outputs a control signal based on the calculation result A processing unit (CPU) 14, a writing storage unit 15 including a block rewritable non-volatile memory (ROM) for storing a control program and data, and a non-volatile EEPROM used when programming in a factory Data storage means 16 (electrically erasable / writable ROM) and a central processing unit (CPU) 14 for performing calculations Data storage and storage means (RAM) 17 for storing data and stored failure information in other electronic control devices, backup storage means (RAM) 18 for storing data in a backup, and central processing unit An output control device 10 connected to the communication port 11 so as to drive an actuator (fuel injection valve or the like) 19 in response to a control signal from the (CPU) 14 and a power supply circuit 21 are provided.

A power supply (battery) 23 is connected to the power supply circuit 21 of the second vehicle control device 4B through a power line 22 so as to receive power supply, and an ignition switch 25 is connected through an ignition signal line 24 so as to receive an ignition signal. Is connected. A vehicle-side power line 26 and a vehicle-side ground line 27 connected to the vehicle-side connector 7 are connected to the power source 23.
On the other hand, the failure diagnosis apparatus 5 is connected to an external power line 28 and an external ground line 29 connected to the external connector 9. The external power line 28 can be connected to the vehicle-side power line 26. The ground line 29 outside the vehicle can be connected to the ground line 27 on the vehicle side.

The vehicle control device 4B is provided with a failure diagnosis program, and performs failure diagnosis when a predetermined condition is satisfied. Here, the predetermined condition is a condition capable of discriminating between engine stall and engine start failure, and when the failure determination unit 14A of the central processing unit 14 of the vehicle control device 4B determines that a failure has occurred. The failure code and the running state are stored in predetermined storage means such as the data holding storage means 16 inside.
When the vehicle is brought into a repair shop, the failure diagnosis device 5 is connected to the vehicle control device 4B of the vehicle 1, and the failure code stored in the data holding storage means 16 inside the vehicle control device 4B. Then, the statistical data of the running state and the starting time for each cooling water temperature of the engine 2 and the number of start failure occurrences for each engine cooling water temperature are read and displayed on the display 8 of the failure diagnosis device 5.

  In this embodiment, the vehicle control device 4B has a storage area (storage area) with predetermined storage means such as the data holding storage means 16 and has a plurality of counter functions with the counter unit 14B of the central processing unit 14. In this counter function, an increment process for increasing each counter (stored value, unit data) corresponding to the establishment of a predetermined condition is performed, and the count value increased by the increment process is stored in the storage area.

  Further, the vehicle control device 4B is provided with a plurality of first counters having upper limit values that are equivalent to each other in accordance with variations in driving conditions, and another second counter (overflow) related to the plurality of first counters. Counter), and when the predetermined condition is satisfied, each of the first counters is continuously incremented by one unit based on the actual results, and the first counter is incremented according to the operation over time. When the first counter of any of the plurality of first counters reaches the upper limit value, a two-dividing process is performed to halve the first counter that has reached the upper limit value. At the same time, the second counter is continuously incremented one unit at a time based on the results of the two-divided processing, and the increment of the second counter is further performed. At the same time, the second counter processing of the first counter other than the first counter that has reached the upper limit value among the plurality of first counters is performed, and then the second counter is operated according to the operation over time. Continue to increment the counter.

  Further, the vehicle control device 4B sets the first counter and the second counter to binary n bits that can be counted as 2 to the n-th power, and the two-divided processing is the value of the first counter. The first counter is incremented one unit at a time based on the actual results when the predetermined condition is satisfied, and the time is increased over time. Incremental processing of the first counter is continuously performed according to the operation, and when any of the first counters of the plurality of first counters reaches the upper limit value, the first counter that has reached the upper limit value is reached. In addition to performing a two-division process that substantially halves one counter, the second counter is continuously incremented one unit at a time based on the performance of the two-division process. At the same time as the counter incrementing process, the two counter processes of the first counter other than the first counter that has reached the upper limit value among the plurality of first counters are performed. As the second counter increases by continuously performing the increment process of the second counter and continuing the increment process of the second counter, the maximum value that is close to overflowing at the last minute The n-th bit after the bisection processing of the first counter that has reached 1 is set to 1 out of 2 values (0, 1), while the value of the counter that has not contributed to the increase in the most recent second counter The counter value can be changed so that only the first bit converges toward 1 out of 2 values (0, 1) by the two-divided processing.

The operating conditions are the coolant temperature and the cranking time when the engine 2 is started. That is, each variable of the operating conditions (input parameter to the vehicle control device 4) set to divide the counter as a parameter is the coolant temperature of the engine 2 that indicates the combustion environment at the start of the engine 2, and the completion. This is the cranking time, which is the time required to show the ease and difficulty before the explosion.
The first counter is divided into a plurality depending on a condition in which the cooling water temperature and the cranking time are combined, and counts the results of the condition to which the first counter is applied as a frequency. That is, the first counter divides the cooling water temperature into a plurality of temperature ranges, divides the cranking time into a plurality of required time zones, and divides the cooling water temperature into a plurality of times depending on a combination of these. Then, for each of the counters divided into a plurality, the result that the applicable condition is established is counted as the established frequency.
If a failure is determined by the failure diagnosis function (self-diagnosis) of the vehicle control device 4B, the first failure code is recorded. When a specific failure is not determined (when the first failure code is not recorded), the entire system related to the vehicle control device 4B is normal, or the second failure code is recorded. Either a symptom-based failure or either. In any case, since the track record remains in the first counter, it can be determined by analysis.

Both the first counter and the second counter are binary n bits that can be counted as 2 n. Here, n = 8 and 2 ⁸ = 256 8 bits (0000000 to 11111111). That is, the unit data, which is the counter value, takes values from 0 (00000000) to 255 (11111111).
Further, in the above-described two-dividing process, the value of the first counter is halved so that it becomes an integer value rounded up after the decimal point. For example, in the case of 255 (11111111), this is divided into 128 (10000000), 128 (10000000) is 64 (01000000), and 2 (00000010) is 1 (00000001). In the case of 1 (00000001), it remains 1 (00000001).
Further, as described above, by continuing the increment process, the two-division process is performed, and the second counter (number of two-divisions) is increased.
As this second counter (number of times of two divisions) increases, the n-th bit after the two division processing of the first counter that has reached the maximum value that is about to overflow at the end of the last time is the binary (0, 1) 1 of them. For example, in the case of 255 (11111111) by this bisection processing, 128 (10000000) is obtained, and the eighth bit of n = 8 is 1.

On the other hand, among the counters that have not contributed to the increase in the latest second counter, the value of the counter having a value (having a value from 1 to 254) is converted into a binary value (0 , 1) is changed so as to converge toward 1. For example, in the case of 254 (11111110) by this bisection processing, it becomes 127 (01111111), and when this is repeated, 2 (00000010) becomes 1 (00000001) and 1 (00000001) becomes 1 (00000001). Will remain. If there is no increment while repeating the bisection processing about 8 times with n = 8, the counter becomes 1 (00000001). That is, the counter eventually converges to 1 (00000001). Therefore, conversely, when the counter is 0 (00000000), significant data indicating that there is no record is obtained.
Further, by holding about half the value so that 255 is set to 128, when the unit data is 0, it becomes clear that the result is 0, and there is “unit” that indicates that there is no result. It turns out that. In this two-part implementation, if unit data is 1 even once, it is 1 no matter how many times it is repeated, so the difference between 0 and 1 is a significant difference. Since this is a very simple numerical determination, the operator can visually determine it, and can also automatically perform computer processing.
On the other hand, in the prior art, one of the overflow counters is shared and reset to 0, so when many are 0, it is impossible to know whether or not there is a track record.

When holding about half the value by repeating the above two-divided implementation, the unit data as the counter value tends to be halved as the second counter (overflow counter) increases. In this tendency, the unit data becomes smaller as the number of times of halving is increased. That is, the count accumulation at the old time point is compressed and reduced, and the count accumulation at the recent new time point is less compressed.
This means that if some trouble currently occurs and the service of the vehicle 1 is received, old data that is not related to the current trouble is compressed, new data that is closely related is not compressed, and includes the passage of time. However, weights such as importance and priority are given depending on the size of the data, and the conditions to be reproduced and verified can be accurately indicated. This accuracy can lead to consideration of preventive measures and the like.

Further, as an example of the flow of judgment processing in the verification process, when statistical data as shown in FIG. 2-No. Among the extremely low temperatures up to 5, no. 2 or No. 3, a large value is counted. 4 or No. If the value is small in 5, since the engine is started in a short time, there is not much problem such as starting failure.
However, no. 2, no. 3 or No. No. 4 is a relatively small value. When a large value is counted at 5, since the engine has always started for a long time, some sort of defect or failure can be considered. Or when the cooling water temperature at the time of starting is low or high, when the cooling water temperature at the time of starting is close to normal temperature, for example, an inconvenience of excessive or insufficient fuel injection amount is likely to occur. If the cranking time is long so as to be uniformly distributed over a plurality of temperature ranges, it can be determined that some kind of failure (for example, an electrical system failure) is considered.

  FIG. 4 shows a relationship between time (time) and a cranking time counter (CT Counter), in which the cranking time until the complete explosion gradually increases with the passage of time. , Shows the trend of the cumulative value of the counter, becomes relatively smaller with time (the smaller value remains), weights the most frequently frequent items relatively larger, and has no record However, it is 0.

In this embodiment, examples of storage of the start time statistics storage data include Example 1 shown in FIG. 5 and Example 2 shown in FIG.
In example 1 of the start time statistical data storage example shown in FIG. 5, each start-up coolant temperature has a cranking time for each temperature range, and any of the cranking time counters exceeds 255 (binary 8-bit). In this case, the value of all the cranking time counters is updated by dividing by 2 (the decimal number is rounded up), and “NO.1” (number of times of two divisions) is incremented. Here, the division into two is to divide the data into two, approximately half. In FIG. 5, as “NO.1”, “NO.2”,. When the “number of times of two divisions (overflow counter)” reaches 255 from 0 to 255, and the overflow is about to occur, the number of times of two divisions is divided into two and is reduced to half.
In Example 1 of the storage example of the start time statistics storage data, “the number of times of two divisions (overflow counter)” is not meaningful in the value, but is meaningful in that it can be continued for a long time. Just continue to.

In the example 2 of the starting time statistical data storage example shown in FIG. 6, a plurality of the second counters are provided corresponding to the cooling water temperatures divided into a plurality of temperature ranges. Then, the second counter is incremented for each of the plurality of temperature ranges in correspondence with the increment of the first counter divided into the temperature ranges of the cooling water temperature.
Also in Example 2 of this start time statistical data storage example, when “the number of times of two divisions (overflow counter)” reaches 255 from 0 to 255 as in Example 1 described above, it is divided into two when the overflow is about to occur. The number of implementations is also divided into two and reduced by half to continue. The “number of times of two divisions (overflow counter)” is not meaningful in the value, but is meaningful in that it can be continued for a long period of time.
In the example 2 of the start time statistical data storage example, as shown in FIG. 6, when any of the cranking time counters exceeds 255 (binary 8 bits), the temperature range of the start-up cooling water temperature that has exceeded. In each unit, the value of the cranking time counter is divided and updated by 2 (the number is rounded up), and the number of times of performing the two-division execution in the temperature range of the cooling water temperature at the start is incremented.

In this embodiment, examples of storing the occurrence count statistics storage data include Example 1 shown in FIG. 7 and Example 2 shown in FIG.
In Example 1 of the failure occurrence count statistical data storage example illustrated in FIG. 7, the third counter is provided with a plurality of engine start failure counts according to the coolant temperature divided into a plurality of temperature ranges. By providing the third counter in this manner, a long-term past record is left for the case of a symptom-based failure in which the second failure code is recorded, thereby facilitating analysis.
In Example 1 of this trouble occurrence count statistical data storage example, “the number of times of two divisions (overflow counter)” is not meaningful in its value, but is meaningful in that it can be continued for a long period of time. Hold.
The “starting failure” in the statistical data in the first example of the failure occurrence statistics data storage example is only “unstartable, starting failure”. For example, when cranking is performed three times intermittently, and it takes a long time for the third time to be a complete explosion determination (becomes a predetermined number of revolutions or more), the “starting failure” is counted twice.
In Example 1 of this trouble occurrence count statistical data storage example, as shown in FIG. 7, when the number of start failures reaches the maximum value of the range, it is stored as the maximum value.

Further, in the second example of failure occurrence statistics data storage shown in FIG. 8, as the fourth counter, the number of start failures when the engine can be started and the number of start failures when the engine cannot be started are set at a plurality of temperatures. A plurality is provided according to the cooling water temperature divided into regions. By providing the fourth counter in this way, a long-term past record is left for the case of a symptom-based failure in which the second failure code is recorded, and the analysis is facilitated.
The “starting failure” in the statistical data in Example 2 of the failure occurrence number statistical data storage example is “startable, starting failure” and “unstartable, starting failure”. It is also possible to set the value including “startable start, bad start” and “unstartable, bad start”. For example, when the cranking is intermittently performed three times, and the third explosion takes a long time and the complete explosion determination (becomes a predetermined number of revolutions) or more, this “starting failure” count is “startable, It can be set once for “starting failure” and twice for “starting failure, starting failure”. In addition, when it is set as a value including “startable / starting failure” and “unstartable / starting failure” without being divided, the “starting failure” is counted three times.
In Example 2 of this failure occurrence count statistical data storage example, as shown in FIG. 8, the number of start failures is stored separately for startable / unstartable.

  In Examples 1 and 2 of the statistical data update process for the number of occurrences of malfunctions in FIGS. 7 and 8 above, when data is stored, it is possible to start using the complete explosion determination after the start failure determination process. The number of start times is stored by separating the start failure and the start failure that cannot be started.

Next, in the statistical data storage process, for example, a case where Example 1 of the start time statistical data storage example and Example 1 of the failure occurrence statistical data storage example are combined will be described with reference to the flowchart of FIG.
As shown in FIG. 3, when the ignition switch 25 is turned on, the program starts (step A01), and it is determined whether or not cranking of the engine 2 has started (step A02). If this step A02 is NO This judgment is continued.
If this step A02 is YES, the start-up coolant temperature is confirmed (step A03), and it is determined whether or not the cranking has been completed (step A04). If this step A04 is NO, this determination is made. Continue.
If this step A04 is YES, as the start time statistical data update process, first, it is determined whether or not the cranking time counter of the present cranking time and the cooling water temperature at the start has reached 255 times (step A05). ), If this step A05 is YES, the number of times of two divisions is incremented and all the cranking time counters are halved (1/2) (step A06). This is to prevent an unexpected data abnormality due to overflow, and a plurality of counters are assigned to different operating states of the engine 2 and are counted by the counter. The counter (overflow counter) is incremented and its value is halved to prevent overflow.
When step A05 is NO or after the process of step A06, the cranking time counter is incremented (step A07), and the start time statistical data update process is terminated.
Then, as the statistical data update process of the number of occurrences of malfunctions, first, it is determined whether or not the start failure determination is established (step A08). If this step A08 is YES, the start of the coolant temperature at the start of this time is started. It is determined whether or not the number of failures has reached 255 (step A09). If this step A09 is NO, the number of startup failures of the current cooling water temperature is incremented (step A10), and the number of failures is generated. The statistical data update process is terminated and the program is ended (step A11).
On the other hand, if step A08 is NO and step A09 is YES, the program is immediately ended (step A11).

In the flowchart of FIG. 3 described above, in the case where the start time statistical data storage example is Example 2, as shown in FIG. And all the cranking time counters are halved (1/2).
Further, in the flowchart of FIG. 3 described above, when the failure occurrence statistics data storage example is Example 2, as shown in FIG. 10, after the start failure determination process (after step A08 above), the complete explosion determination is performed. Etc. are used to separate the start failure that can be started from the start failure that cannot be started, and the number of start failures is stored (step A12).

  In the statistical data storage process of FIG. 3 described above, the start time statistical data storage example 1 and example 2 and / or the failure occurrence frequency statistical data storage example 1 and example 2 can be appropriately combined. .

As a result, the vehicle control device 4 according to this embodiment performs data processing for storing data over time. In particular, in the failure diagnosis of the vehicle 1, a history relating to the operating state of the vehicle 1 and the engine 2. Data processing when accumulating information and information data over a certain elapsed time can be performed, and an analysis method using the data processing, that is, an analysis method including a data storage method can be implemented.
In the vehicle control device 4, a plurality of counters are provided to be assigned to the operating state of the engine 2, the values accumulated by the individual counters are compared, and then the data is analyzed to accumulate the actual data over a long period of time. In this accumulation, including the weighting according to the flow of time, it makes sense to facilitate the analysis of the numerical value of the accumulated data, accumulation of defects with no remaining fault codes as data, etc. The objective can be achieved. In other words, all the counters other than the target of the second counter (overflow counter) halve the counter uniformly, and weighting the importance and priority according to the size of the data including the passage of time, the data Further, it is possible to accurately indicate the conditions to be reproduced and verified by the repair shop.

Although the embodiments of the present invention have been described above, the configuration of the above-described embodiments will be described for each claim.
The invention according to claim 1 is provided with a plurality of first counters having upper limit values equivalent to each other corresponding to variations in operating conditions, and another second counter (overflow counter) related to the plurality of first counters. ), And when the predetermined condition is satisfied, each of the first counters is continuously incremented by one unit based on the result, and the increment process of the first counter is continued according to the operation over time. When one of the plurality of first counters reaches an upper limit value, a two-dividing process is performed to substantially halve the first counter that has reached the upper limit value. Then, the second counter is incremented continuously by one unit based on the results of the two-division processing, and the second counter is incremented. At the same time, the two counters of the first counter other than the first counter that has reached the upper limit value among the plurality of first counters are divided into two, and then the second counter is operated according to the operation over time. The increment process is continued.
As a result, the trend can be grasped by the data, so it is possible to shorten the work time for confirming the failure reproduction, take time for the cause identifying work thereafter, and weight the obtained data by the difference in the elapsed time between each other. And memorize it. In particular, the latest data can be weighted recently, the priority and importance can be increased, and the older data can be relatively lowered. Furthermore, data can be accumulated over a long period by counting the two-division processing. Since the count data can be stored separately from the failure code, an analysis different from the diagnosis using only a limited failure code can be performed.

In the invention according to claim 2, the operating conditions are a coolant temperature and a cranking time when the engine is started. The first counter is divided into a plurality depending on a condition in which the cooling water temperature and the cranking time are combined, and counts the results of the condition to which the first counter is applied as a frequency.
As a result, the temperature range of the cooling water temperature at which defects are likely to occur and the generation ratio thereof can be acquired.

In the invention according to claim 3, a plurality of the second counters are provided corresponding to the cooling water temperatures divided into a plurality of temperature ranges. The second counter is incremented for each of the plurality of temperature ranges in correspondence with the increase of the first counter divided into the cooling water temperature range by the increment process.
As a result, it is possible to update the two-part processing for each temperature range where the cooling water temperature is divided into temperature ranges, so that it is possible to obtain data that suppresses the influence of the external environment such as the difference in season, The influence by the difference in the elapsed time of the obtained data can be suppressed.

In the invention according to claim 4, as the third counter, a plurality of engine start failure times are provided according to the coolant temperature divided into a plurality of temperature ranges.
As a result, it is possible to keep track of the tendency while leaving a record of engine start failure, which is a symptom base. The analysis makes it easy to find a failure or malfunction.

In the invention according to claim 5, as the fourth counter, according to the coolant temperature divided into a plurality of temperature ranges, the number of start failures that have become possible to start the engine and the number of start failures that have become unstartable. Several were provided.
As a result, the results of engine start failure, which is a symptom base, can be further detailed, and it is possible to grasp each trend in detail when the engine 2 is finally started and when it cannot be started. And the analysis not only facilitates the work of finding a failure or malfunction, but also makes it easy to find defects in the control settings.

In the invention according to claim 6, a plurality of first counters having upper limit values equivalent to each other corresponding to variations in operating conditions are provided, and another second counter related to the plurality of first counters is provided, The first counter and the second counter are both binary n bits that can be counted as 2 n, and the two-part dividing process is an integer value obtained by rounding up the value of the first counter to the decimal point. When the predetermined condition is satisfied, each of the first counters is continuously incremented by one unit based on the actual result, and the first counter When the increment process is continued and any one of the first counters reaches the upper limit, the first counter that has reached the upper limit is substantially halved. The second counter is incremented continuously by one unit based on the results of performing the two-divided process, and at the same time as the second counter increment process, The first counter other than the first counter that has reached the upper limit in the first counter is divided into two parts, and then the second counter is incremented according to the operation over time. As the second counter is increased by continuing the increment process of the second counter, the first counter that has reached the maximum value that is about to overflow at the end is divided into two. The n-th bit after processing is set to 1 out of the binary values (0, 1), while the counter that has not contributed to the increase in the latest second counter The bisection process the values of the data to be modified so as to converge toward only one bit to one of two values (0, 1).
As a result, the obtained data can be weighted and stored according to the difference in elapsed time. In particular, the latest data and the latest data can be heavier, the priority and the importance can be increased, and the older data can be relatively lowered. Moreover, data can be accumulated over a long period by counting the two-division processing. Furthermore, since the count data can be analyzed separately from the failure code, it is possible to perform analysis different from the diagnosis based on only the limited failure code. Furthermore, since the tendency can be grasped by the data, it is possible to shorten the operation time for confirming the defect reproduction. In addition, if data is read out by connecting to the failure diagnosis device 5, it can be determined that the 1st bit in the n-th bit is high in priority and importance, and conversely the case where only the 1st bit is as low as 1 is instantaneous. Will be able to judge. At this time, it is possible to automatically calculate the data, but it is possible to easily determine visually without incurring the cost, and it takes time to identify the cause later. be able to.

Of course, in the above-described embodiment, various application modifications are possible as follows.
For example, the above-mentioned “statistical data” is stored in a data holding storage means (ROM) of a non-volatile memory (EEPROM, etc.) that can be stored even after the power source (battery) is removed. Data can be collected. If there is no non-volatile memory, it can also be stored in backup storage means (RAM) where data is backed up.
The “starting failure” may be further finely divided. For example, it is possible to subdivide the “starting failure” including the one that reaches a predetermined number of revolutions that can be said to be complete at one time and then stalls after the complete explosion determination.
Furthermore, the method of “data accumulation” may be other than the cranking time at the time of starting the engine. For example, the power source (battery) voltage and current can be applied not only to the engine but also to the power source of an electric vehicle or a hybrid vehicle.
Furthermore, the “storage means” does not necessarily have to be provided in the vehicle control device having a diagnostic function, and another control device (vehicle body control device, shift control device, cooperative control) via a communication network on the vehicle. It is also possible to provide in an apparatus etc.

  The control of the vehicle control device according to the present invention can be used in combination with other controls.

It is a figure which shows the communication hardware structure in the control apparatus for vehicles of a communication diagnostic system. It is a block diagram of the communication diagnostic system mounted in the vehicle. It is a flowchart in the case of preserve | saving the contents of Example 1 of a starting time statistical data example, and Example 1 of a malfunction occurrence frequency statistical data example in a statistical data preservation | save process. It is a figure which shows transition of the counter value in time and a cranking time counter. It is a figure which shows the content of Example 1 of an example of starting time statistical data preservation | save. It is a figure which shows the content of the example 2 of an example of starting time statistical data preservation | save. It is a figure which shows the content of Example 1 of a malfunction generation frequency statistics data storage example. It is a figure which shows the content of the example 2 of a malfunction occurrence frequency statistics data example. FIG. 4 is a flowchart illustrating a main part in a case where a start time statistical data storage example is Example 2 in the statistical data storage processing of FIG. 3; FIG. 4 is a flowchart showing a main part when an example of storing failure occurrence statistical data is taken as Example 2 in the statistical data storage processing of FIG. 3;

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Engine 3 Communication diagnostic system 4 Vehicle control apparatus 4A 1st vehicle control apparatus 4B 2nd vehicle control apparatus 5 Failure diagnosis apparatus 14 Central processing unit 14A Failure determination part 14B Counter part 15 Memory means for writing (ROM)
16 Data holding storage means (ROM)
17 Data storage and storage means (RAM)
18 Backup storage means (RAM)
19 Actuator 21 Power Supply Circuit 23 Power Supply 25 Ignition Switch

Claims (6)

  It has a storage area and a plurality of counter functions. In this counter function, an increment process is performed to increase the corresponding counter when a predetermined condition is satisfied, and the count value increased by the increment process is stored in the storage area. In the vehicle control device for storing, a plurality of first counters having upper limit values equivalent to each other corresponding to variations in driving conditions are provided, and another second counter related to the plurality of first counters is provided, When the predetermined condition is satisfied, each of the first counters is continuously incremented by one unit based on the result, and the increment process of the first counter is continuously performed according to the operation over time. , When any one of the plurality of first counters reaches an upper limit, the upper limit The first counter that has reached 2 is divided in half, and the second counter is incremented continuously by one unit based on the results of performing the two-divided process. Simultaneously with the increment processing of the counter, the second counter processing of the first counter other than the first counter that has reached the upper limit value among the plurality of first counters is performed, and then the second counter according to the operation over time. A control apparatus for a vehicle, wherein the increment processing of the second counter is continued.   The operating conditions are a coolant temperature and a cranking time at the start of the engine, and the first counter is divided into a plurality depending on a combination of the coolant temperature and the cranking time. The vehicle control device according to claim 1, wherein the vehicle control device according to claim 1, wherein the vehicle performance is counted as a frequency.   A plurality of the second counters are provided corresponding to the cooling water temperatures divided into a plurality of temperature ranges, and the first counter divided into the cooling water temperature ranges is adapted to increase by the increment process. The vehicle control device according to claim 2, wherein the second counter is incremented for each of the plurality of temperature ranges.   4. The vehicle control according to claim 1, wherein the third counter is provided with a plurality of engine start failure times in accordance with a coolant temperature divided into a plurality of temperature ranges. 5. apparatus.   A fourth counter is characterized in that a plurality of start failure counts that enable engine start and a start failure count that disables engine start are provided in accordance with cooling water temperatures divided into a plurality of temperature ranges, respectively. The vehicle control device according to any one of claims 1 to 3.   It has a storage area and a plurality of counter functions. In this counter function, an increment process is performed to increase each counter corresponding to the establishment of a predetermined condition, and the count value increased by the increment process is stored in the storage area. In the vehicle control device for storing, a plurality of first counters having upper limit values equivalent to each other corresponding to variations in driving conditions are provided, and another second counter related to the plurality of first counters is provided, The first counter and the second counter are both binary n bits that can be counted as 2 n, and the two-part dividing process is an integer value obtained by rounding up the value of the first counter to the decimal point. Each of the first counters is one unit based on the results when the predetermined condition is satisfied. One of the plurality of first counters has reached an upper limit value, and the first counter is continuously incremented according to the operation over time. In doing this, the first counter that has reached the upper limit value is divided in half, and the second counter is incremented continuously by one unit based on the performance of the two-part process. Further, simultaneously with the increment processing of the second counter, the two counter processing of the first counter other than the first counter that has reached the upper limit value among the plurality of first counters is performed, and thereafter According to the operation over time, the second counter is incremented continuously, and the second counter is incremented continuously. As the counter increases, the n-th bit after the bisection processing of the first counter that has reached the maximum value that is about to overflow at the last minute is set to 1 out of 2 values (0, 1), while Of the counters that did not contribute to the increase of the second counter, the value of the significant counter can be changed to converge so that only the first bit converges toward 1 of the binary values (0, 1) by the two-part dividing process. A control apparatus for a vehicle.

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