JPS62279151A - Control device mounted on car - Google Patents

Abstract

PURPOSE:To prevent erroneous mounting of a device to other kind of a vehicle, by a method wherein a control device mounted on a car, e.g. an antiskid control device, a fuel injection amount control device, can be recognized and features of the device can be easily grasped. CONSTITUTION:A control device CA for mounting itself stores recognition information, capable of being distinguished from that on other control device mounted on car, by means of a C1, and is adapted to output recognition information by means of a C2, where occasion demands, A lot number, adherent information, executed in a quality management process, are utilized as the recognition information, and the information is stored in a non-volatile memory element. Where there is a given output demand on the control device mounted on car, information from the memory element is outputted, and by means of the information, erroneous recognition of parts and the like is prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an in-vehicle i, II I'll device that is installed in a vehicle and manages predetermined components of the vehicle.

[Prior Art] Conventionally, a vehicle is equipped with various control devices, such as an anti-skid control device, a fuel injection amount control device, etc., to manage the components of the vehicle. The proportion of these on-vehicle control devices being installed is increasing as the cost of electronic components decreases and quality improves.

Furthermore, in response to the spread of the above-mentioned control devices, dealers and service facilities are rapidly moving toward computerization, and are even attempting to carry out detailed checks on vehicle-mounted control devices.

In other words, manufacturers and users will work together to advance the computerization of control mechanisms, making vehicle control even more accurate.
This results in faster speeds.

Furthermore, the above-mentioned in-vehicle control device checks the vehicle driving status, checks various component devices, etc., and stores the check results. ! It has a new usage mode that was not found in the II device, and was published in Japanese Patent Application Laid-open No.
Many proposals have been made for constructing self-check functions such as the mounted component management system disclosed in Japanese Patent No. 140626.

[Problems to be Solved by the Invention] However, even with the 1i-mounted control device, which is being increasingly used as described above, it is still not sufficient and has the following problems.

The appearance of an on-vehicle control device is simply a collection of electronic components, and it is not possible to know the type of the control device or the control content from the appearance.

Therefore, if an in-vehicle control device installed in a vehicle is mistakenly installed in a vehicle that was developed and designed for another vehicle type, for example, if a control device for a manual transmission vehicle is installed in an automatic transmission vehicle. Even when the control device itself is normal, it cannot be detected by a simple inspection. In addition, even if a defect is discovered in a program or part of a component of a loft product that has a control 'II device, it is difficult to distinguish between a normal control device and the loft product, and all It is necessary to take measures such as replacing or repairing the product.

The present invention has been made to solve the above problems,
It is an object of the present invention to provide a vehicle-mounted control I-wave device that can easily and easily recognize each vehicle-mounted control device and accurately grasp the characteristics of the control device.

[Means for Solving the Problems] The means constructed by the present invention to solve the above-mentioned problems are mounted on a vehicle as shown in the basic configuration diagram of FIG.
In-vehicle control device C that executes predetermined management for the vehicle
In A, recognition information storage means C1 stores recognition information necessary for distinguishing and recognizing the control device CA from other vehicle-mounted control devices; and when a predetermined output request is made, the recognition information storage means C
The gist of the present invention is a 11-mounted control device C△ characterized by comprising a recognition information output means C2 for outputting the recognition information stored in No. 1.

[Operation] The recognition information storage unit C1 in the vehicle-mounted control I-wave device A of the present invention stores recognition information that allows the vehicle-mounted control device OA to be identified from other vehicle-mounted control devices. For example, identification numbers based on the capabilities of the in-vehicle control device CA, lot numbers, and unique information for distinguishing recognition such as that carried out in normal quality control processes such as rough matching of serial numbers in the loft. It is composed of a memory element etc. that stores . Note that this recognition information is fixed and unchanging information that corresponds to the vehicle-mounted control device, so it is stored using a memory element that performs discontinuous storage or a memory element that is always backed up.

The recognition information output means C2 outputs the content stored in the recognition information storage means C1, that is, recognition information, when a predetermined output request is made to the vehicle-mounted IFF device CA. It is not possible to know the recognition information by simply looking at the storage means C1 in which the recognition information is stored. Therefore, the recognition information outputting means C2B outputs the recognition information of the king in response to an output request from outside. The output format etc. is designed as appropriate; for example, the recognition information is transmitted to an external mold in the form of digital information as it is, or it is output via a display means etc. to make it understandable to humans. It can be anything.

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

First, FIG. 2 is a schematic configuration diagram showing an internal combustion engine equipped with an in-vehicle control device according to an embodiment and its peripheral devices.

1 is the internal combustion engine body, 2 is the piston, 3 is the spark plug, 4
is an exhaust manifold, 5 is an oxygen sensor provided in the exhaust manifold 4 and detects the residual oxygen concentration in the exhaust gas, 6 is a fuel injection valve that injects fuel 1 into the intake air of the internal combustion engine main body 1, and 7 is an intake manifold , 8 is an intake air temperature sensor that detects the temperature of intake air sent to the internal combustion engine body 1, 9 is a water temperature sensor that detects the internal combustion engine cooling water 4 T I-I W, 10 is a throttle valve, and 11 is an idle switch. 14 is a surge tank that absorbs the pulsation of intake air, and 15 is an air flow meter that detects the amount of intake air.

16 is an igniter that outputs the high voltage necessary for ignition; 17 is a distributor that is linked to a crankshaft (not shown) and distributes the high voltage generated by the igniter 16 to the spark plugs 3 of each cylinder; and 18 is a distributor 17 One is a rotation angle sensor that also serves as a rotation speed sensor that outputs 24 pulse signals for one revolution of the distributor 17, that is, two revolutions of the crankshaft. 20 is an electronic control circuit as a control means; 21 is a key switch; 22 is a key switch 21;
a battery that supplies power to the electronic control circuit 20 via;
each represents.

Furthermore, the vehicle-mounted control device of this embodiment also has a function of diagnosing the various sensors described above based on the outputs of the sensors. Therefore, a test switch 24 for activating this diagnostic function and a warning light 26 that turns on when any abnormality is found in the diagnostic results are provided.

Next, the internal configuration of the electronic control circuit 2o will be explained. In the figure, 30 is a central unit that inputs and calculates data output from each sensor according to a control program, and performs processing for controlling the operation of each device. a processing unit (CPU); 31 a read-only memory (ROM) in which various control programs described later and storage information as initial data are stored; 32 an electronic control circuit 2;
Random access memory (RAM) where data input to 0 and data necessary for arithmetic control are temporarily read and written.
, 33 is a timer that can read the real time controlled by the CPU 30 at any time and has a register (hereinafter referred to as conveyor Δ) that generates an interrupt routine to the CPU 30, and 36 is each sensor and a switch. 24
38 is the input port for inputting the signal from the igniter 1
6, an output port for driving the fuel injection valve 6 and warning light 26 provided in each cylinder; and 3, a common bus for interconnecting each of the above elements. The input port 36 is connected to the oxygen sensor 5
．． Intake temperature sensor 8. Water temperature sensor 9° Throttle sensor 1
1. An analog input section (not shown) that A/D converts and inputs an analog signal from the air flow meter 15, an idle switch (not shown) in the throttle sensor 11, a rotation angle sensor 18, a cylinder discrimination sensor 19. Test switch 24
It consists of a pulse input section (not shown) into which pulse signals are input. Further, when the output port 38 receives a command to start fuel injection from the CPU 30, it outputs a control signal to open the fuel injection valve 6, and this control signal causes the output port 38 to output a signal from the CPLJ 30 that commands the end of fuel injection. It continues to be output until it is received. The command to end the fuel injection is issued by a match interrupt routine to the conveyor that occurs when the fuel injection end time set by the CPIJ 30 on the conveyor A inside the timer 33 and the actual time that the timer 33 continues to count match. It is configured to be given by

The in-vehicle control device of this embodiment configured as described above is
In order to always optimize the operating state of the internal combustion engine 1, a basic control routine whose flowchart is shown in FIG. 3 is executed.

The basic control routine of the internal combustion control 13111 shown in FIG.
When the key switch 21 is turned on, it is activated and first the CP
Initialization such as clearing the internal register of U30 is performed (step 1o○) to prepare for subsequent processing.

Subsequently, the operating state of the internal combustion engine 1, for example, the air flow meter 1
51 rotation angle sensor 18. Processing is performed to read signals from the water temperature sensor 9, etc. (step 110), and from the various data read in this way, the basics of control of internal combustion n function 1 such as intake air IQ of internal combustion opening/opening 1, rotation speed N1, or load Q/N are performed. (Step 120). Hereinafter, based on the various quantities obtained in Step 120, well-known ignition timing control (Step 130) and fuel injection resistance control (Step 140) are performed. After completing step 140,
The process returns to step 110 and repeats the process described above.

Note that the control of the fuel injection fJ4ffi here performs air-fuel ratio feedback control in a steady state, and the basic fuel injection m determined based on the load Q/N of the internal combustion engine 1 is corrected by air-fuel ratio feedback. The internal combustion engine gJ is determined by the fuel injection amount corrected by various correction terms such as coefficients.
Although synchronous injection is performed twice per rotation of the internal combustion engine rIA1, oven control and other well-known controls that increase the amount of fuel can be used in place of air-fuel ratio feedback control in response to various transient demands during internal combustion engine RIA1 operation. Sometimes it is done. The basic control of these internal combustion engines, including ignition timing control, is well known, so a description thereof will be omitted.

Next, the process of step 110 of the basic $II/III routine described above will be described in detail using the flowchart of FIG. As explained in FIG.
The output information of a large number of sensors is input. Handling all this information at once! 2! This cannot be done with the CPU 30, which has limited processing power. Therefore, usually the CPU
30 is programmed to sequentially capture the outputs of the sensors on each side according to a predetermined schedule. FIG. 4 shows an input management program according to the schedule, which is read from r(0M31) and processed when step 110 is executed.

First, the sensor output information to be imported this time is determined based on a predetermined schedule (step 111), and the sensor output according to that determination is imported (step 112).
). The output of each sensor will be data within a common sense range, but this range (Illll) is stored in the ROM 31 in advance, and whether or not the value fetched in step 112 is within the common sense range. In other words, the imported value is compared with the upper limit value of the output of the sensor stored in the ROM 31 (step 113), and if it exceeds the upper limit value, the standard value is replaced with the imported data. is given (step 114), and the error flag is set to 1- (step 115). On the other hand, if the value is smaller than the upper limit, a comparison is made with the lower limit in the ROM 31 (step 116), and if the value is smaller than the lower limit, step 114 is carried out as described above.
The process of step 115 is executed, and if the value is larger than the lower limit value, the next data store process (step 117) is executed without changing the captured data. This data store processing is based on the basic tll f
The output of each sensor is used in the process of step 120 of the ULL routine, etc., but in order to use it, the RAM
This is a process of storing the latest output results of a predetermined sensor at a predetermined address of 32. In this way, the capture of the output data of one sensor according to the schedule is completed, and in the same way, every time the CPtJ30 is requested to capture the sensor output data, the CPU 30
The program shown in the figure is executed to capture all sensor output data.

As is clear from the flow chart in Figure 4 above,
The in-vehicle control I device of this embodiment not only simply controls the basic operating state of the internal combustion engine 1, but also monitors the outputs of various sensors necessary for this purpose, and if an abnormality occurs in the sensor, It also has the function of setting an error flag and storing the abnormality. The state of this error flag is displayed as a blinking display of the warning light 26 by the processing of the error check routine executed when the test switch 24 is turned on. FIG. 5 shows a flowchart of the error check routine. As shown in the figure, this program first determines whether or not the test switch 24 is rONj (step 200), and only if it is rONj, moves to the following process (step 210); otherwise, this routine continues. Finish all processing. Step 2
In steps 10 to 230, a process is performed to output the product number, serial number, and date of manufacture stored in the ROM 31 in advance. The product number here is an IT number assigned to identify the type of in-vehicle control device, the so-called model. By checking this product number, you can obtain internal information such as program contents of the in-vehicle control device. You can know. The serial number is a consecutive number assigned to control devices with the same part number in the order in which they were manufactured. By knowing this number and the above product number, it is possible to identify the in-vehicle control device, such as by checking the manufacturing lot. becomes. The manufacturing date stores the date on which the in-vehicle control device was manufactured in order to make the information more reliable. After the information output of these three in-vehicle control devices themselves, step 24
0 is executed, an output is made according to the set state of the error flag, and all processing of this program is completed.

In addition, since the above-mentioned product number, serial number, manufacturing date, etc. are numbers with large digits, the output is normal serial information that is converted into a binary state from the higher or lower number by blinking a warning light. It uses transfer technology. Therefore, the user can check the recognition of the in-vehicle control device itself and the set or reset status of the error flag by visually determining the blinking of the warning light or by inputting information into a personal computer via a photoelectric converter. can do.

According to the on-vehicle control device of this embodiment configured and operated as described above, the following excellent effects are exhibited.

First, normally, once an in-vehicle control device is installed in a vehicle, it simply becomes a black box.
Even if something developed and designed for another car model is installed due to some kind of mistake, or even if a defect is discovered in one loft, it is impossible to identify each in-vehicle control device in detail. It was impossible. However, the in-vehicle control device of this embodiment outputs enough information to distinguish its own control device from other in-vehicle control devices when the test switch 24 that requests the output of the error flag state is turned on. Therefore, the above problem is resolved.

Furthermore, in the above embodiment, the information that can recognize the in-vehicle control IT device is the corresponding ? It is output together with error information detected by the J-geki control device. Therefore, when a user uses a personal computer to import such information,
By performing processing such as creating a file for each 1m information, reference to past error information can be easily and quickly performed, and the quality of vehicle maintenance and inspection can be improved.

Additionally, in the writable memory of the electronic control circuit 2o described above, repair information such as the product number of the repaired sensor, etc., and the date of repair can be stored from an external electronic device, based on the state of the error flag. If so, W1 can easily recognize not only failure information but also repair information for it, which further improves the reliability of the information. Furthermore, in the above case, if the electronic control unit @ 20 is provided with a timing function and the timing of inspection and replacement of each sensor etc. is stored in advance in the ROM 31, the electronic control unit 20 can simply be used in case of failure. In addition to outputting information, it is also possible to output information that prompts maintenance and inspection, making vehicle maintenance even easier. Then, when a sensor, etc. is replaced or repaired according to the information that prompts this maintenance/inspection, the time measurement for that sensor, etc. is reset and starts a new time measurement, which will prompt the next maintenance/inspection. You can get information.

In the above embodiment, the product number, serial number, and date of manufacture are used as the recognition information, but information on the number that can identify the in-vehicle Lll-11 equipment may also be used.

In addition, the output is not limited to simply flashing a warning light, but can also be displayed in text information on an indicator panel, transferred directly to an external device via a connector, etc. without departing from the gist of the present invention. Pl! Mr. i can realize this.

[Effects of the Invention] As described above in detail with reference to the embodiments, the in-vehicle control device of the present invention memorizes recognition information that can be distinguished from other in-vehicle control devices, and can respond to requests. It outputs the recognition information.

Therefore, the on-vehicle control Qi, which has conventionally existed as a black box, can be accurately and easily identified.

As a result, the in-vehicle control device of a different car model may be
Measures can be easily taken even in cases such as when products are damaged or a defect is discovered in a particular lot of products.

[Brief explanation of drawings]

FIG. 1 is a basic configuration diagram showing the basic configuration of the present invention, and FIG. 2 is an internal combustion engine system structure l112 equipped with the device of the embodiment.
Figure, the third part is the flowchart of the base routine P-t, the third part is the first one, and the third one is the first part of the routine.
Details of the i control routine's sensor output capture processing
” shows a flowchart of an error checking routine executed when OA... *Force formation device C1... Recognition information storage means C2... Recognition information output means 1... Internal combustion engine 20
...Electronic control circuit 24...Test switch 26
・・・Warning light

Claims (1)

[Scope of Claims] In an in-vehicle control device that is installed in a vehicle and executes predetermined management for the vehicle, a recognition device that stores recognition information necessary to distinguish and recognize the control device from other in-vehicle control devices. An in-vehicle control device comprising: information storage means; and recognition information output means for outputting the recognition information stored in the recognition information storage means when a predetermined output request is made.