JP3136994B2 - Data processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device for executing an operation based on data stored in a storage means.

[0002]

2. Description of the Related Art Hitherto, various data processing apparatuses of this type have been proposed, and an example thereof is a fuel injection pump control apparatus for a diesel engine. In a fuel injection pump of a diesel engine, the characteristics are different for each pump. However, it is desirable that the fuel injection pump control device executes control according to the characteristics of the pump. Therefore, it is conceivable that a ROM in which the characteristic data is irrevocably stored is fixed for each pump, and the CPU of the fuel injection pump control device reads the characteristic data stored in the ROM and executes control. (Japanese Patent Publication No. 4-28901)
issue).

The reading of the characteristic data from the ROM is generally performed by data communication or the like. Therefore, in this type of fuel injection pump control device, the data read from the ROM is written into a backup RAM or the like provided near the CPU, and the backup R
It has been considered to execute control based on characteristic data stored in the AM. When such a configuration is adopted,
It is not necessary to read the characteristic data by executing data communication each time during the control, and the efficiency of the control can be improved.

[0004]

However, the characteristic data stored in the backup RAM may be changed (destroyed). Therefore, the following countermeasures can be considered. That is, mirror data obtained by inverting "1" and "0" of the characteristic data (original data) is stored in the backup RAM together with the above-mentioned characteristic data, and it is checked whether both of them hold the inverted state. Perform a so-called mirror check, calculate the SUM value of the characteristic data stored in the backup RAM, and check the SUM.
By judging whether or not the data coincides with the above, it is checked whether there is any abnormality in the characteristic data, that is, whether the characteristic data has changed (SUM check). When an abnormality is detected, the characteristic data is read from the ROM again and written into the backup RAM.

However, abnormalities that are not detected even when such a check is performed may occur in the characteristic data. For example, as illustrated in FIG. 6A, when data at the same position of the original data and the mirror data are simultaneously inverted, such an abnormality cannot be detected by the mirror check. Also, as exemplified in FIG.
If the data of “1” and “0” of the same digit are simultaneously inverted, such an abnormality cannot be detected by the check SUM. Further, as illustrated in FIG. 6C, when an abnormality occurs that satisfies the above two conditions at the same time, such an abnormality is detected by mirror check.
It cannot be detected by UM check.

In such a case, the CPU sets the backup R
The control is executed using the AM characteristic data as it is without noticing that it is abnormal. This type of data is automatically updated like learning data and does not approach the original value, so that control is executed based on incorrect characteristic data thereafter. This kind of problem also occurs in some other data processing devices.

Therefore, the present invention provides a data processing apparatus which reads predetermined data stored in a storage means and executes an operation, and preferably retains the original value of the predetermined data so as to be usable for the operation. Made for purpose.

[0008]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, the invention according to the first aspect of the present invention relates to an internal combustion engine.
A first memory means a nonvolatile that unerasable stores characteristic data of the fuel injection pump of the engine, and a second storage means for rewritably storing the characteristic data, the characteristic data stored in said first storage means And read the loaded feature
A data updating means for performing the data update processing for writing the gender data in the second storage means, based on the stored the characteristic data to said second storage means, the fuel injection pump
In the data processing apparatus including a calculation means for performing an operation control, the said data updating means, regardless of the correctness of the characteristic data stored in said second storage means, i
When the ignition key is turned on and a certain number of times
Each trip (However, one trip means one ignition
(Meaning from the operation key on to off) during the data update process.

According to the present invention, the data updating means reads the characteristic data stored in the first storage means and executes a data updating process for writing the read characteristic data in the second storage means. Then, the second storage means holds the characteristic data, and the calculating means sets the fuel injection pump based on the characteristic data stored in the second storage means.
Perform the operation that controls .

Here, the data updating means is ignited regardless of whether the characteristic data stored in the second storage means is correct or not.
When the session key is turned on and
The above-described data update process is executed for each backup . However, 1
A lip is a single ignition key on to off.
Means. Therefore, even if the abnormality in the characteristic data stored in the second storage means is not detected, every time the predetermined condition is satisfied, the above characteristic data stored in the second storage means, said first memory means Is updated by the above characteristic data read from the. Further, the first storage means stores the characteristic data in a non-rewritable manner, and the characteristic data stored therein rarely changes.
Therefore, the original value of the characteristic data can be favorably retained and used for the calculation. Therefore, the reliability of the calculation by the calculation means can be improved extremely favorably.

According to a second aspect of the present invention, there is provided a fuel injection system for an internal combustion engine.
A first memory means a nonvolatile that unerasable stores characteristic data of the pump morphism, and second storage means for rewritably storing the characteristic data, after being stored in the first storage means
Reads the serial characteristic data, and a data updating means for performing the data update processing for writing the read characteristic data to said second storage means, the above-mentioned Japanese stored in said second storage means
Based on the sex data, the data processing apparatus provided with an arithmetic means for executing an operation of controlling the fuel injection pump, said data updating means, storing of the said second memory means
Regardless of whether the above characteristic data is correct or incorrect,
When the key is turned off and every certain number of trips
(However, one trip means one ignition key
The means to off from down), and executes the data update processing.

That is, the difference between the present invention and the first embodiment is as follows. In the invention according to claim 1,
When the ignition key is turned on and
Data update processing is performed every few trips . In contrast, in the present invention, the ignition key is turned off.
Is the Ki and every certain number of times trip, is to perform the data update process.

[0013]

[0014]

The third aspect of the present invention provides the first or second aspect.
In the invention described in the above, the storage in the second storage means is
Even if there is a history that the voltage for holding
Regardless of whether the characteristic data is correct or incorrect,
You and the client performs the data updating process.

[0016]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration of a fuel injection pump control device to which the present invention is applied. In addition,
This fuel injection pump control device includes a fuel injection amount control actuator 2 mounted on an electronically controlled fuel injection pump (hereinafter simply referred to as a fuel injection pump) 1 for a diesel engine.
And via the fuel injection timing control actuator 3
This is a device for controlling the fuel injection amount and fuel injection timing of the fuel injection pump 1.

In the fuel injection pump 1, mechanical factors such as component processing accuracy and assembly accuracy of components, responsiveness of each of the actuators 2 and 3, or various sensors mounted on the fuel injection pump 1 (not shown) There is a variation between individuals due to electrical and magnetic factors in the output characteristics of (ii). For this reason, the fuel injection pump 1 includes a storage device 4 for storing characteristic data corresponding to the variation. The ECU 5, which is a control main body that executes the above control, reads out the characteristic data from the storage device 4, executes well-known calculations according to the operation state of the diesel engine, and drives the actuators 2, 3.

In the storage device 4, an OTP as first storage means for storing characteristic data in a non-rewritable manner except when a predetermined voltage is applied to the write voltage supply line L4.
ROM 6 (another nonvolatile storage element such as an EPROM or an EEPROM may be used), a serial communication interface 7 for transmitting data to the ECU 5 by a serial communication method, a communication buffer 8 for noise removal, signal level or impedance conversion. And an input filter 9 for removing high-frequency noise from a clock signal described later input via the power supply and clock signal line L1. The clock signal that has passed through the input filter 9 branches into two, one of which is directly input to the serial communication interface 7 as a clock signal, and the other of which is input to a circuit including a diode 10a for preventing backflow and a capacitor 10b for charging. Is done. Then, the electric power charged in the capacitor 10b of this circuit is used as electric power for driving the OTPROM 6 and the serial communication interface 7.

The writing of the characteristic data to the OTPROM 6 is performed as follows. That is, in a shipping inspection process of the fuel injection pump 1 from the factory, the fuel is actually injected to check the injection characteristics, and data (characteristic data) corresponding to a deviation from the standard injection characteristics of the pump is supplied to the writing voltage supply. OTPROM while applying a predetermined voltage to line L4
6 is stored. The storage device 4 is for storing characteristic data unique to the fuel injection pump 1 as described above, and is very convenient for management because it is mounted on the fuel injection pump 1.

The ECU 5 includes a CPU 11 for executing various calculations including the above control, an input signal buffer 12 for inputting various sensor signals to the CPU 11, and a digital signal when the sensor signal is an analog signal. ADC 12a to be converted and input to CPU 11, power supply circuit 13, PNP transistor 14, communication buffer 15, C
An actuator drive circuit 16 that converts a signal output from the PU 11 into a drive signal of a predetermined voltage and outputs the drive signal to each of the actuators 2 and 3, a ROM 17 in which a program for a data update process described later is stored in a non-rewritable manner, and is used for those processes. Memory (B / U memory) 18 for rewritably storing data and a resistor 20.

The power supply circuit 13 receives a power supply from the battery 19 and supplies a predetermined voltage to the entire ECU 5. Also, the backup memory 18 receives power supply from the battery 19 even when the ignition key is turned off, and always retains data by the power supply. That is, the backup memory 18 corresponds to a second storage unit. Further, sensors for inputting a signal to the input signal buffer 12 include an engine speed sensor, an intake pressure sensor, an engine coolant temperature sensor, and the like. The ROM 17 stores C
The external ROM of the PU 11 is used.
M may be used.

The ECU 5 and the storage device 4 are connected to three signal lines L1 to L3 including the power supply and clock signal line L1.
Connected at The CPU 11 in the ECU 5 has a PN
The on / off of the P transistor 14 is periodically switched, and the output of the PNP transistor 14 is output to the storage device 4 as a clock signal. Then, as mentioned above,
The clock signal can synchronize with the serial communication interface 7 of the storage device 4 and supply power to each element of the storage device 4. Also,
The serial communication interface 7 is connected to the CPU 1 via a communication buffer 8, a serial communication line L2, and a communication buffer 15.
1 is connected. Further, the ground line L3 is connected to the ECU
The ground potential (ground potential) on the fifth side and the ground potential of the storage device 4 are directly connected to each other and used as reference operating potentials. Both ground potentials may be connected via a conductive component.

Next, the operation of the fuel injection pump control device thus configured will be described. The CPU 11 reads the characteristic data from the OTPROM 6 bit by bit in synchronization with the clock signal, and stores it in the backup memory 1.
8 is stored. Thereafter, the actuators 2 and 3 are controlled according to the sensor signals and the stored characteristic data,
The fuel injection timing and fuel injection amount are adjusted. Since this control is well known, its description is omitted. Further, the data stored in the backup memory 18 may be destroyed due to a decrease in the output voltage of the battery 19 or the like, and the contents may change. Therefore, the CPU 11 sets the backup memory 18
Then, the next data update process is performed to update the characteristic data stored in the OTPROM 6 with the characteristic data read from the OTPROM 6 again. Subsequently, the data updating process will be described with reference to the flowchart of FIG. Note that the CPU 11
Repeatedly executes this process at predetermined intervals.

As shown in FIG. 2, when the process is started, first, at step 101, it is determined whether or not a data update condition is satisfied. Here, as the data update condition, various conditions are considered as shown in the following (1) to (4), and any of them is adopted. In addition, adopt the conditions shown in or
Is an embodiment of the present invention, and the conditions shown in
If only is adopted, it is not included in the scope of the present invention.
It is a reference example. . When the ignition key is turned on and every fixed number of trips (however, one trip means from one ignition key on to one off). It is when the ignition key is turned off and every trip a fixed number of times (however, this condition can be adopted
(Limited to a device that supplies power to the ECU 5 for a predetermined time after the ignition key is turned off.) Each time the traveling distance of the vehicle equipped with the fuel injection pump 1 reaches a predetermined value. Each time the integrated value of the time that the ignition key is kept on reaches a predetermined value. (Or) (when the engine is stalled or at low speed) When the data update condition is not satisfied (101: NO)
Moves on to step 103, where the backup memory 18
It is determined whether there is a history that the voltage (backup memory holding voltage) supplied from the battery 19 has decreased.
If there is no degraded history (103: NO), the process proceeds to step 105, and the presence or absence of an abnormality is determined by performing a mirror check and a SUM check on the characteristic data stored in the backup memory 18. If the characteristic data is normal, the process is temporarily terminated and the process waits until the next processing cycle. On the other hand, when the data update condition is satisfied (10
1: YES), if there is a history of a decrease in the backup memory holding voltage (103: YES), or if an abnormality in the characteristic data is detected by a mirror check or a SUM check, the process proceeds to step 107 and subsequent steps.

In step 107, the SUM value and the data counter CDATA are reset to zero. In the following step 111, one piece of characteristic data is read from the OTPROM 6, and in step 113, it is determined whether there is any abnormality in the data by an overrun error check, a parity check, and a framing error check. If the data is normal, the process proceeds to step 115, where the data (one data) is written into the backup memory 18 and the data counter CDATA is incremented by one. In the following step 117, the data counter CD
It is determined whether or not the value of ATA matches the total number N of the characteristic data. If they do not match (117: NO), the value of the data is added to the SUM value in step 119, and the process proceeds to step 111 to execute the same processing for the next data.

As described above, the processing of steps 111 to 119 is repeatedly executed, and when all data has been written to the backup memory 18, CDATA = N (117: YE
S). Then, the process proceeds to step 121 to determine whether or not the read data matches the SUM value.
That is, since the last data read is the check SUM, the SUM value and the check SUM should match if the data is read normally. Therefore, if the two match (121: YES), it is determined that the characteristic data has been correctly updated, and the process is temporarily terminated. On the other hand, if an abnormality is found in step 113 while the data is updated one by one by the processing in steps 111 to 119,
If the last read data does not match the SUM value (121: NO), the process proceeds to step 107 to update the characteristic data again from the beginning. Also, if a timeout error occurs during this process,
Perform known error handling.

As described above, in the present fuel injection pump control device, regardless of whether the characteristic data stored in the backup memory 18 is correct or not, when the data update condition determined according to the operating state is satisfied, and when the backup memory holding voltage is When it has decreased, the data updating process from step 107 is executed. That is, the characteristic data is read from the OTPROM 6 (step 111), and the read data is written in the backup memory 18 (step 115).

Therefore, even if no abnormality is detected in the characteristic data of the backup memory 18, the characteristic data is
It can be updated with the characteristic data of the TPROM 6. O
The TPROM 6 normally stores the characteristic data in a non-rewritable manner, and the data stored therein rarely changes. Therefore, control of the actuators 2 and 3 can be executed using accurate characteristic data. Therefore, the reliability of the control of the fuel injection pump 1 by the present device becomes extremely high. In addition, since the characteristic data is not always obtained by communication, the processing is speeded up. Furthermore, since the characteristic data of the fuel injection pump 1 is automatically updated like learning data and does not approach the original value, the effect of executing the data update processing becomes more remarkable.

Further, in the above embodiment, the data in the backup memory 18 is unconditionally updated when the update of the characteristic data is instructed (when the process proceeds to the processing after step 107). Is instructed, the characteristic data stored in the backup memory 18 is compared with the characteristic data read from the OTPROM 6,
You may decide not to update according to the result. However
However, in this case, too, it is merely a reference not included in the scope of the present invention.
An example. FIG. 3 is a flowchart illustrating an example of such a data update process. FIG. 3 shows only the processing corresponding to the steps 107 to 121 in FIG.

As shown in FIG. 3, when the condition for updating the characteristic data is satisfied and the routine proceeds to step 201, the continuous communication error counter CREN and the data mismatch counter CF are set.
Reset UIT to 0. In the following step 203,
An all data reception process is performed in which all data of the characteristic data in the OTPROM 6 is compared with data in the backup memory 18. FIG. 4 shows the details of the all data reception processing.

As shown in FIG. 4, first, at step 231
Resets the data counter CDATA, the SUM value, the communication error flag FTUS, and each bit of a data match check bit string to be described later to "0". In addition,
In step 231, the above-described reset is performed after storing the data of the data match check bit string before reset as the previous data.

In the following step 233, the characteristic data is set to 1
Data read, error check (parity check,
Overrun error check and framing error check) are executed. If there is any abnormality, the communication error flag FTUS is set to 1 in step 237, and if normal, the process proceeds to step 241. Step 24
At 1, the data counter CDATA is incremented by one, and at step 243, the read data is temporarily stored.
That is, the read data is not written directly to the backup memory 18 but is temporarily stored in another area.

In the following step 245, the read data is collated with the corresponding data (B / U data) in the backup memory 18, and if they match (245: YES).
Goes to step 247 as it is,
45: NO), the corresponding data match check bit is set to "1" in step 249, and the routine goes to step 247. The subsequent processes of steps 247 to 253 are the same as the processes of steps 117 to 121 in FIG. That is,
The processes of steps 233 to 251 are executed while sequentially adding the SUM values (step 251). When CDATA = N (247: YES), it is determined whether or not the last read data (check SUM) matches the SUM value. Is determined (step 253). If an affirmative determination is made in step 253, the process returns to the routine of FIG. 3 as it is. If a negative determination is made, the communication error flag FTUS is set to 1 (step 255), and the process returns to the routine of FIG.

Here, the configuration of the data match check bit string will be described using the example of FIG. In the example of FIG. 5, the characteristic data is composed of six data DATA1 to DATA6 and a check SUM.
TA3, DATA4, DATA5 and check SU
M matches, and DATA2 and DATA6 do not match.
In such a case, in the data match check bit string, D
The data match check bits corresponding to ATA2 and DATA6 become "1", and the other data match check bits become "0".

Returning to FIG. 3, when the all data reception processing in step 203 is completed, it is determined in step 265 whether or not the communication error flag FTUS is 0. If there is no abnormality during communication and FTUS = 0 (YES), the flow shifts to step 267 to determine whether or not all bits of the data match check bit string are “0”, that is, the characteristic data stored in the backup memory 18. Is OTPROM6
It is determined whether or not it completely matches the characteristic data read from. If they match (YES), the process ends, and if they do not match (NO), step 269
Then, the data mismatch counter CFUIT is incremented by one, and the process proceeds to step 271.

At step 271, it is determined whether or not the data mismatch counter CFUIT has become equal to or greater than a predetermined value M. If M has not been reached (NO), the flow shifts to step 273 to determine whether or not the same data is continuously inconsistent. That is, the data match check bit string stored as the previous data in step 231 is compared with the data match check bit string created in step 249, and it is determined whether or not there are bits that are continuously “1”. Judge. When the process shifts to this step for the first time, a negative determination is made, and the process is repeated from the all data reception process of step 203.

On the other hand, if there is a data coincidence check bit that is continuously "1", the flow shifts to step 275, where the all data forced update process is executed and the process is once ended. If there is data that does not match continuously, it is highly likely that the data stored in the backup memory 18 has changed (destructed). Therefore, in this case, the characteristic data of the backup memory 18 is stored in the OTPRO as executed in steps 111 to 119 in FIG.
It is updated with the data read from M6.

In the processing of the second and subsequent rounds, step 273 is executed.
If a negative determination is made in step (2), noise or the like is superimposed on the data read from the OTPROM
7: NO). Therefore, in this case, the processing shifts to step 203 and the processing from the above-mentioned all data reception processing is repeated. When the loop of steps 203 to 273 is repeated M times, that is, it is determined that data does not match continuously (267: NO), but none of the data that has been continuously determined to be mismatching up to that time is determined. If not (273: NO), an affirmative determination is made in step 271 and the communication processing abnormality counter is incremented in step 277, and the processing is once ended.

The communication processing abnormality counter is defined as OTPR
A counter that indicates the possibility of data destruction of the OM6, malfunction of the communication function, disconnection of the communication line, etc. When the counter reaches a predetermined value, predetermined data (so-called default value) is used instead of the characteristic data. ), And processing such as turning on a warning lamp is executed by another routine. This type of processing is well known and will not be described in detail here.

Further, all data reception processing (step 20)
If the communication error flag FTUS is set in step 237 or 255 during 3), a negative determination is made in step 265 and the process proceeds to step 281. Step 28
In step 1, the communication error counter CREN is incremented by one. In step 283, CREN ≧ K
It is determined whether or not. If CREN <K (283: NO), the process returns to step 203 to repeat the above processing. Then, when CREN ≧ K (283: YES), that is, the communication error flag FTUS continues K times.
Is set (265: NO), the process proceeds to step 285, and a communication continuous error flag is set. The communication continuous error flag is a flag indicating that external noise may be frequently superimposed or that a communication line or a connector is in poor contact. When this flag is set, OTPRO is set.
Control may be performed to stop communication with M6. Also,
After step 285, the process proceeds to step 277 described above.

For this reason, the present embodiment has the following effects in addition to the effects of the above-described embodiment. That is, in the present embodiment, when the characteristic data read from the OTPROM 6 completely matches the characteristic data stored in the backup memory 18 (267: YES).
Does not update the characteristic data. In such a case, even if the characteristic data is updated, there is no change before and after the update, and the data update process is useless. Therefore, unnecessary data update processing can be omitted, and control can be made more efficient.

Further, in the present embodiment, even if it is determined that the data does not match once (267: NO), the collation is repeated a plurality of times, and when it is determined that the same data does not match continuously ( Only in step 273: YES), the characteristic data is updated (step 275). For this reason, even when it is determined that the two do not match due to, for example, noise superimposition on the data, if the two match in the second and subsequent verifications (267: YES), the characteristic data is not updated.
Therefore, unnecessary data update processing can be omitted better, and control can be made more efficient. Further, when there is a possibility that the communication system is abnormal (271: YES, 283: YE
S) also does not update the characteristic data. Therefore, it is possible to properly prevent the characteristic data in the backup memory 18 from being updated with erroneous data. Therefore,
Control reliability can be further improved.

In each of the above embodiments, the CPU
11 corresponds to data updating means and calculating means, the processing of steps 107 to 121 and the processing of step 275 are data updating means, and the processing of controlling the actuators 2 and 3 using the characteristic data of the backup memory 18 is the calculating means. to, its corresponding respectively.

The present invention is not limited to the above embodiments, and can be implemented in various forms without departing from the gist of the present invention. For example , the first storage means for storing data in a non-rewritable manner includes O
The characteristic data as TPROM6 not limited to be stored as digital data, for example, resistors, capacitors, such as inductors, Ru can be applied shall be stored as analog data.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a fuel injection pump control device to which the present invention has been applied.

FIG. 2 is a flowchart showing a data updating process of characteristic data executed by the fuel injection pump control device.

FIG. 3 is a flowchart illustrating another data update process.

FIG. 4 is a flowchart showing an entire data receiving process of the data updating process.

FIG. 5 is an explanatory diagram showing a configuration of a data match check bit string used in the data update processing.

FIG. 6 is an explanatory diagram illustrating a data abnormality that is not detected by a conventional check.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electronic control fuel injection pump for diesel engines 2 ... Actuator for fuel injection amount control 3 ... Actuator for fuel injection timing control 4 ... Storage device 5 ... ECU 6 ... OTPROM 7 ... Serial communication interface 11 ... CPU 17 ... ROM 18 ... Backup Memory 19: Battery L1: Power supply and clock signal line L2: Serial communication line L3: Ground line L4: Write voltage supply line

────────────────────────────────────────────────── (5) Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI F02D 45/00370 F02D 45 / 00370F (JP, A) JP-A-4-125752 (JP, A) JP-A-5-289949 (JP, A) JP-B-4-28901 (JP, B2) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) G06F 12/16 F02D 1/08 F02D 41/24 F02D 41/40 F02D 45/00

Claims (3)

(57) [Claims] 1. A nonvolatile first storage means for storing the characteristic data of a fuel injection pump of an internal combustion engine in a non-rewritable manner, a second storage means for storing the characteristic data in a rewritable manner, and the first storage means. read the stored the characteristic data, a data updating means for performing the data update processing for writing the read characteristic data to said second storage means, based on the characteristic data stored in said second storage means, the fuel A data processing device comprising: an arithmetic unit for performing an arithmetic operation for controlling the injection pump; wherein the data updating unit is configured to perform an ignition key operation regardless of whether the characteristic data stored in the second storage unit is correct or not.
Is turned on and at a certain number of trips (however,
And one trip means one ignition key-on
The meaning) until Luo off, the data processing apparatus and executes the data update processing. 2. A non-volatile first storage means for non-rewritably storing characteristic data of a fuel injection pump of an internal combustion engine ; a second storage means for rewritably storing the characteristic data; read the stored the characteristic data, a data updating means for performing the data update processing for writing the read characteristic data to said second storage means, based on the characteristic data stored in said second storage means, the fuel A data processing device comprising: a calculation unit configured to perform a calculation for controlling the injection pump; wherein the data update unit is stored in the second storage unit.
Regardless of whether the above characteristic data is correct or not, the ignition key
Is turned off and every trip a fixed number of times (however,
And one trip means one ignition key-on
The meaning) until Luo off, the data processing apparatus and executes the data update processing. 3. The storage in the second storage means is held.
Even if there is a history of voltage drop due to
Regardless of the correctness of the data, the data updating means is above de
3. The data processing device according to claim 1, wherein the data processing device executes data update processing .