JPH0769093A - Failure diagnostic device and failure diagnostic method for vehicular control device - Google Patents

Abstract

PURPOSE:To simplify constitution, and restrain an increase in cost to the minimum by providing a first and a second operating condition detecting means, a first a second control devices, a first and a second trouble detecting means, a first and a second trouble signal output means, a converting means, a judging and diagnosing means and an informing means. CONSTITUTION:When a signal from an engine operating condition detecting sensor 1 is inputted, a trouble judging part 3 judges whether or not the engine operating condition detecting sensor 1 runs into trouble. When a code converting part 4 receives a trouble detecting signal, the part outputs the signal to an ISO converting part 5 as a trouble signal proper to an engine control unit 2. The ISO converting part 5 receives trouble detecting signals from the code converting part 4 and a code converting part 14, and converts these into a signal fit for a prescribed communication system. A trouble judging part 13 receives a signal from an AT condition detecting sensor 11, and judges whether or not the AT condition detecting sensor 11 runs into trouble. When the code converting part 14 receives the trouble detecting signal, the part outputs the signal to the engine control unit 2 as a trouble signal proper to an AT control unit 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle for diagnosing a failure of an electronic component mounted on a vehicle, particularly, when a control that deteriorates exhaust gas is performed, a failure of the electronic component causing the failure. The present invention relates to a failure diagnosis device and a failure diagnosis method for a control device.

[0002]

2. Description of the Related Art Conventionally, the operation of an engine, an automatic transmission (hereinafter referred to as AT), etc. mounted on a vehicle is generally electronically controlled, but these controls are performed according to a plurality of sensor outputs. Therefore, there is a problem that proper control cannot be performed if the sensor fails. For this reason, each automobile manufacturer has detected a sensor failure by its own failure diagnosis method, and has further output its own sensor failure signal to its own diagnostic device.

On the other hand, in recent years, in accordance with the law concerning exhaust gas regulations in the United States (so-called OBD-II), exhaust gas components emitted from a vehicle equipped with an AT are deteriorated.
When the T control is performed, it is stipulated that the driver is notified by detecting the faulty AT control electronic component and lighting the indicator lamp or the like as the cause (for the engine control electronic component, The same).

Further, in this regulation, failure signals uniquely detected by each company are defined by the above-mentioned law as communication regulations (ISO.
9141), a defective electronic component can be detected as a common signal regardless of the manufacturer when a predetermined diagnostic device is used.
Therefore, for example, in a vehicle equipped with an engine control unit (ECU), an AT control unit, and a control unit for controlling other devices, a failure of an electronic component that causes deterioration of exhaust gas from a control target of each control unit is detected. When it is detected, the failure is notified by turning on the indicator light as described above,
It is conceivable that the failure signal is encoded for each control device in accordance with the specified communication regulations, and the encoded failure signal is output to the diagnostic device.

[0005]

However, in such a configuration, each control device must be provided with a converter capable of outputting a coded signal suitable for the above-mentioned specified communication method. There is a problem that the configuration becomes complicated and the cost increases enormously.

The present invention was devised in view of the above problems, and makes it possible to efficiently output a coded signal conforming to a specified communication system, simplify the configuration, and minimize the cost increase. An object of the present invention is to provide a failure diagnosis device and a failure diagnosis method for a vehicle control device, which are limited.

[0007]

Therefore, a failure diagnosis device for a vehicle control device according to a first aspect of the present invention detects a driving state of a predetermined constituent element among vehicle constituent elements mounted on a vehicle. A first driving state detecting means; a second driving state detecting means for detecting a driving state of another constituent element different from the predetermined constituent element among the plurality of vehicle constituent elements;
A first control device for controlling the predetermined constituent element based on an output from the driving state detecting means; and a second control device controlling the predetermined constituent element based on an output from the second driving state detecting means. In the failure diagnosis device for a vehicle control device, the failure diagnosis device for diagnosing a failure of any one of the first operation state detection means, the second operation state detection means, the first control device, and the second control device. Is installed in the control device,
When the first control device or the first failure detection means for detecting a failure of the first operating state detection means and the first control device are arranged to receive a failure detection signal from the first failure detection means, As the failure signal peculiar to the first control device, the second
First failure signal output means for outputting to the control device, and the second
Second failure detection means arranged in the control device for detecting a failure of the second control device or the second operating state detection means,
Second failure signal output means disposed in the second control device, which outputs a failure detection signal unique to the second control device when receiving a failure detection signal from the second failure detection device, and the second control device. Conversion means, which is provided, receives the failure signals from the first failure signal output means and the second failure signal output means, and converts each failure signal into a signal conforming to a predetermined communication method; and the conversion means. The failure signal changed to a signal compatible with the predetermined communication method is read by any one of the first operating state detecting means, the second operating state detecting means, the first control device, and the second control device. It is characterized by having a judgment / diagnosis means for judging and diagnosing a failure.

The invention according to claim 2 is characterized in that when the first control device or the first operating state detecting means is out of order, it is provided with an informing means for informing this. Further, in the invention according to claim 3, when the second control device or the second operating state detecting means is out of order,
It is characterized in that a notifying means for notifying this is provided.

Further, in a fourth aspect of the present invention, a second failure signal from the first failure signal output means is read to judge and diagnose a failure of the first control device or the first operating state detecting means. It is characterized by having a judgment / diagnosis means. Further, the invention according to claim 5 is a second judgment / diagnosis for reading a failure signal from the second failure signal output means, and judging and diagnosing a failure of the second control device or the second operating state detecting means. It is characterized by having means.

Further, according to a sixth aspect of the present invention, one of the engine control device for controlling the engine mounted on the vehicle and the automatic transmission connected to the engine is the first control device, and the other is the other. It is characterized by being a second control device. Further, the invention according to claim 7 is a traction control control device, ABS in which an operation state detecting means for detecting an operation state is connected to the second control device.
At least one control device of the control device and the power steering control device is connected, and the operating condition detection means is connected to the control device connected to the second control device or the control device connected to the second control device. It is configured to output the failure detection information in 1) to the second control device.

According to a eighth aspect of the present invention, there is provided a method for diagnosing a failure in a vehicle control device, comprising: a first operating state detecting means for detecting an operating state of a predetermined component among the vehicle components mounted on the vehicle. Second driving state detecting means for detecting a driving state of another constituent element of the plurality of vehicle constituent elements, and first control for controlling the predetermined constituent element based on an output from the first driving status detecting means. An apparatus and a second controller for controlling the predetermined component based on the output from the second operating state detecting means, and the first operating state detecting means, the second operating state detecting means, and the first operating state detecting means. Control device and second
In a failure diagnosis method for a vehicle control device for diagnosing a failure of any one of the control devices, a failure detection step of detecting a failure of the first control device or the first operating state detection means and outputting a failure detection signal. A step of outputting a failure signal output to the second controller as a failure signal peculiar to the first controller upon receiving the failure detection signal of the failure detecting step, and the second controller or the second operating state detecting means. Fault detection step of detecting a fault of the second control device and outputting a fault detection signal, and a fault signal output step of outputting the fault detection signal by the fault detection step as a fault signal peculiar to the second control device; (1) Signal conversion for receiving a failure signal peculiar to a control device and a failure signal peculiar to a second control device, and converting each failure signal into a signal conforming to a predetermined communication method One of the first operating state detecting means, the second operating state detecting means, the first control device, and the second control device by reading the step and the failure signal changed to a signal compatible with the predetermined communication method. It is characterized by having a failure diagnosis step of judging and diagnosing such a failure.

Further, in the invention according to claim 9, the first control device or the first operating state detecting means is out of order on the basis of the failure signal changed to a signal compatible with the predetermined communication method. It is characterized by having a failure notification step for notifying the effect. Further, the invention according to claim 10 notifies that the second control device or the second operating state detecting means has a failure based on a failure signal changed to a signal compatible with the predetermined communication method. It is characterized by having a failure notification step to be performed.

Further, the invention according to claim 11 reads the failure signal peculiar to the first controller output in the failure signal output step, and determines the failure of the first controller or the first operating state detecting means. It is characterized by having a failure diagnosis step for performing a diagnosis. The invention according to claim 12 reads the failure signal peculiar to the second controller output in the failure signal output step, and determines and diagnoses the failure of the second controller or the second operating state detecting means. It is characterized by having a failure diagnosis step.

Further, the failure detecting method of the present invention according to claim 13 is a transmission operating condition detecting means for detecting an operating condition of an automatic transmission connected to an engine mounted on a vehicle, and the operating condition detecting means mounted on the vehicle. An engine operating state detecting means for detecting an operating state of the engine, a transmission control device for controlling an automatic transmission connected to the engine, and an engine control device for controlling an engine mounted on the vehicle, A failure diagnosis method for a vehicle control device for diagnosing a failure of any one of the transmission operation state detection means, the engine operation state detection means, the transmission control device and the engine control device, the transmission control device or the transmission A failure detection step of detecting a failure of the machine operating state detection means and outputting a failure detection signal, and a failure detection signal obtained by this failure detection step A failure signal output step of outputting as a failure signal peculiar to the transmission control device, a failure detection step of detecting a failure of the engine control device or the engine operating state detection means, and outputting a failure detection signal, and the failure detection Upon receiving a failure detection signal by the step, a failure signal output step of outputting to the transmission control device as a failure signal unique to the engine control device, the failure signal unique to the transmission control device and the failure signal unique to the engine control device. And a signal conversion step of converting each failure signal into a signal compatible with a predetermined communication method, and reading the failure signal converted into a signal compatible with the predetermined communication method to detect the transmission operating state. Means, engine operating state detection means, transmission control device and engine control device, and diagnoses and diagnoses any failure. It is characterized in that it includes a fault diagnosis step.

[0015]

In the failure diagnosis device for a vehicle control device according to the above-mentioned claim 1, the first operating state detecting means detects the operating state of a predetermined component among the vehicle components mounted on the vehicle, and The driving state detecting means detects a driving state of another constituent element different from the predetermined constituent element among the plurality of vehicle constituent elements.

The first control device controls the predetermined components based on the output from the first operating state detecting means, and the second control device controls the output from the second operating state detecting means. Based on the above, the predetermined components are controlled. Then, the failure of any one of the first operating state detecting means, the second operating state detecting means, the first control device, and the second control device is diagnosed.

That is, when the first failure detection means detects a failure of the first control device or the first operating state detection means, the first failure signal output means receives the failure detection signal and the first control device. The second as the unique failure signal
Output to control device. Further, when the second failure detection means detects a failure of the second control device or the second operating state detection means, the second failure signal output means receives the failure detection signal and a failure peculiar to the second control device. Output as a signal.

Further, the conversion means receives the failure signals from the first chapter signal output means and the second failure signal output means, converts each failure signal into a signal compatible with a predetermined communication method, and makes a determination. In the diagnosis means, the failure signal converted into a signal compatible with the predetermined communication method by the conversion means is read, and the first operating state detection means,
The failure of any one of the second operating state detecting means, the first control device, and the second control device is determined and diagnosed.

According to the second aspect of the invention, the first
When the control device or the first operating state detecting means is out of order, the informing means informs this, and in the invention according to claim 3, the second controlling device or the second operating state detecting means is out of order. If so, the notification means notifies this. Further, in the invention according to claim 4, in the second judging / diagnosing means, the failure signal from the first failure signal output means is read, and the first controller or the first controller is read.
The failure of the operating state detection means is judged and diagnosed.

On the other hand, in the invention according to claim 5, the second determination / diagnosis means reads the failure signal from the second failure signal output means, and the second control device or the second control signal is read.
It is also possible to judge and diagnose a failure of the operating state detecting means (claim 5). In the invention according to claim 6, one of the engine control device for controlling the engine mounted on the vehicle and the automatic transmission connected to the engine is the first control device, and the other is the second control device. As a device, any one of the above-mentioned first operating state detecting means, second operating state detecting means, first control device, and second control device is determined and diagnosed.

According to the invention of claim 7, the second
At least one control device of a traction control control device, an ABS control device and a power steering control device, in which a driving condition detection means for detecting a driving condition is connected to the control device, or a driving condition detection device connected to the control device. The failure detection information is output to the second control device to detect a failure of the control device, the control device, or the operating state detection means connected to the control device.

Further, in the failure diagnosis method for a vehicle control device according to the present invention, the first operating state detecting means detects the operating state of a predetermined component among the vehicle components mounted on the vehicle. The second driving state detecting means detects the driving states of other constituent elements different from the predetermined constituent element among the plurality of vehicle constituent elements. The first control device controls the predetermined component based on the output from the first operating state detecting means, and the second controller controls the predetermined component based on the output from the second operating state detecting means. Controls certain components.

Further, any one of the first operating state detecting means, the second operating state detecting means, the first control device and the second control device is diagnosed for failure. That is, in the failure detection step, a failure of the first control device or the first operating state detection means is detected and a failure detection signal is output. In the failure signal output step, when the failure detection signal obtained in the failure detection step is received, it is output to the second controller as a failure signal specific to the first controller.

In the failure detecting step, a failure of the second control device or the second operating state detecting means is detected and a failure detecting signal is output, and in the failure signal outputting step, the failure detecting signal by the failure detecting step is output. When received, it is output as a failure signal peculiar to the second control device. In the signal conversion step, the failure signal unique to the first control device and the failure signal unique to the second control device are received, and each failure signal is converted into a signal that conforms to a predetermined communication method.

Further, in the failure diagnosing step, the failure signal converted into a signal compatible with the predetermined communication method is read, and the first operating state detecting means, the second operating state detecting means, the first control device and the first controlling device are provided. The failure of any one of the two control devices is judged and diagnosed. Further, in the invention according to claim 9, in the failure notification step, the first control device or the first operating state detection means fails based on the failure signal changed to a signal compatible with the predetermined communication method. To notify that.

Further, in the invention according to claim 10, in the failure notification step, the second control device or the second operating state detecting means is based on the failure signal changed to a signal compatible with the predetermined communication method. Informs that there is a failure. Further, in the invention according to claim 11, in the failure diagnosis step, the failure signal peculiar to the first controller output in the failure signal output step is read, and the failure of the first controller or the first operating state detecting means. To judge and diagnose.

Further, in the invention according to claim 12, in the failure diagnosis step, the failure signal peculiar to the second controller output in the failure signal output step is read to detect the second controller or the second operating state. The failure of the means is judged and diagnosed. Also, in the failure diagnosis method for a vehicle control device according to the present invention, the transmission operating state detecting means detects the operating state of the automatic transmission connected to the engine mounted in the vehicle to determine the engine operating state. The detecting means detects the operating state of the engine mounted on the vehicle.

Further, the transmission control device controls the automatic transmission connected to the engine, and the engine control device controls the engine mounted on the vehicle. Then, a failure is diagnosed in any one of the transmission operating state detecting means, the engine operating state detecting means, the transmission control device, and the engine control device. That is, in the failure detection step, the failure of the transmission control device or the transmission operating state detection means is detected, a failure detection signal is output, and the failure signal output step receives the failure detection signal by the failure detection step. , Is output as a failure signal specific to the transmission control device.

In the failure detection step, a failure of the engine control device or the engine operating state detection means is detected, a failure detection signal is output, and the failure signal output step receives the failure detection signal by the failure detection step. And output to the transmission control device as a failure signal specific to the engine control device. Further, in the signal converting step, the failure signal peculiar to the transmission control device and the failure signal peculiar to the engine control device are received and each failure signal is converted into a signal adapted to a predetermined communication system.

In the failure diagnosing step, the failure signal converted into a signal compatible with the predetermined communication system is read, and the transmission operating state detecting means, the engine operating state detecting means, the transmission control device and the engine control are read. Determine and diagnose the failure of any of the devices.

[0031]

Embodiments of the present invention will be described below with reference to the drawings. (A) Description of First Embodiment FIG. 1 is a block diagram showing a failure diagnosis device according to a first embodiment of the present invention. The failure diagnosis device shown in FIG.
When used in a vehicle equipped with an AT (automatic transmission) and when AT control and engine control are performed such that the components of exhaust gas deteriorate,
This is for detecting and notifying a malfunctioning electronic component that is considered to be the cause.

In FIG. 1, reference numeral 1 denotes one or more engine operating state detecting sensors (second operating state detecting means, engine operating state detecting means). The engine operating state detecting sensor 1 is mounted on a vehicle. It detects an operating state of an engine as a predetermined constituent element of vehicle constituent elements, and examples thereof include a throttle opening sensor, an air flow sensor, an O ₂ sensor, and the like.

Reference numeral 2 denotes an engine control unit (second control device, engine control device). The engine control unit 2 controls the engine based on the information from the engine operating condition detection sensor 1 and the operating condition of the engine. It is capable of detecting a failure of the detection sensor 1, and includes a failure determination section 3, a code conversion section 4, an ISO conversion section 5, and an engine control section 6.

The failure determination unit (second failure detection means) 3 detects a failure of the engine operating state detection sensor 1. That is, by inputting a signal from the engine operating state detection sensor 1, the engine operating state detection sensor 1
It is designed to determine whether or not there is a failure. When the code conversion section (second failure signal output means) 4 receives the failure detection signal from the failure determination section 3, the code conversion section 4 receives the ISO (International Sta.
ndardization Organization) output to the conversion unit 5. That is, when the failure determination unit 3 determines that the engine operating state detection sensor 1 is out of order, a code-converted signal (fault detection signal) to that effect is output.

For example, a throttle opening sensor, an air flow sensor, and an O as the engine operating state detection sensor 1
A failure detection signal as shown in FIG. 4 is output based on the operating state detection information from the _two sensors.
Further, as shown in FIG. 4, failure detection signals having different duty ratios are output between the sensors. The code conversion when outputting the failure detection signal uses a conversion law specific to the code conversion unit 4.

Reference numeral 5 denotes an ISO conversion section (conversion means). The ISO conversion section 5 receives failure detection signals from the code conversion section 4 and a code conversion section 14 which will be described later, and outputs each failure detection signal to a predetermined value. The signal is converted into a signal compatible with the communication method. That is, for example, the code signal indicating the failure of the engine operating state detecting sensor 1 converted by the code converting unit 4 and the code signal indicating the failure of the AT state detecting sensor 11 described later are used for communication speed, data conversion law, communication circuit, etc. Is to be converted in accordance with a predetermined predetermined communication regulation (for example, ISO9141) (hereinafter, the signal converted by the ISO conversion unit 5 is simply referred to as an ISO code).

The engine control unit 6 controls the engine state based on the information from the engine operating state detection sensor 1. Further, 12 is an AT control unit (first control device, transmission control device).
The control unit 12 is a transmission (AT) attached to the engine.
Based on the information from the AT state detection sensor 11 that detects the driving state of the AT, the AT can be controlled and the failure of the AT state detection sensor 11 can be detected.
3, a code conversion unit 14, and an AT control unit 15.

The AT state detection sensor 11 (second operating state detecting means, transmission operating state detecting means) is A
Pulse generators A and AT for detecting T input shaft rotation speed
A pulse generator B that detects the output shaft rotation speed, a shift control solenoid valve that switches the gear position, a damper clutch control solenoid valve that controls the damper clutch of the torque converter, and a pressure control solenoid valve that controls the hydraulic pressure supplied to the friction element during gear shifting. Etc. Although it is hard to say that the solenoid valve itself is a sensor, it is included in the AT state detection sensor 11 because the AT operating state can be determined by the drive state of the valve.

The failure determination section (first failure detection means) 13 is
By inputting a signal from the AT state detection sensor 11, it is determined whether or not the AT state detection sensor 11 is out of order. Upon receiving the failure detection signal from the failure determination section 13, the code conversion section (first failure signal output means) 14 outputs to the engine control unit 2 as a failure signal unique to the AT control unit 12. That is, when the failure determination unit 13 determines that the AT state detection sensor 11 is out of order, a code-converted signal (fault detection signal) to that effect is output. Also in this case, similarly to the code conversion unit 4 described above,
As shown in FIG. 4, signals having different duty ratios are output between the throttle opening sensor, the air flow sensor and the O ₂ sensor. Further, the code conversion when outputting this failure detection signal uses the conversion law peculiar to the code conversion unit 14 as in the code conversion unit 4.

Further, 21 to 25 are input / output ports,
The AT control unit side input / output ports 21 and 22 are connected to the engine control unit side input / output ports 23 and 24 via control signal lines 19 and 9, respectively. That is, the input / output ports 21 and 23 and the control signal line 19 are interposed between the code conversion unit 14 and the ISO conversion unit 5, and the input / output is performed between the AT control unit 15 and the engine control unit 6. The ports 22 and 24 and the control signal line 9 are interposed. Further, the ISO conversion unit 5 and a later-described determination / diagnosis tester (determination / diagnosis means) 8 can be connected via an input / output port 25 and an external reading terminal 40.

As a result, the code-converted AT state detection sensor 11 as an output signal from the code conversion unit 14 is obtained.
The failure information of is input to the ISO conversion unit 5. The AT control unit 15 controls the AT on the basis of the information from the AT state detection sensor 11, and also controls the AT via the input / output ports 22 and 24 and the control signal line 9.
Coordinated control information can be exchanged between the T control unit 15 and the engine control unit 6. Thus, for example, so-called comprehensive control can be performed in which the engine output is reduced and shift shock is prevented by retarding the ignition timing or reducing the throttle valve opening when shifting.

Further, MIL (Malfunction Indicator La)
mp, notification means) 7 is, for example, the IS from the ISO conversion unit 5.
An O code is input, and based on this signal, failure information of the engine operating state detection sensor 1, the engine control unit 2 or the AT state detection sensor 11, the AT control unit 12 is displayed to the driver by lighting a display or an alarm. It is a notification.

Further, the MIL 7 has a code conversion unit 4
You may make it light when the signal from 14 is input into the ISO conversion part 5. Further, the determination / diagnosis tester 8 is detachably provided to the external reading terminal 40, and reads the ISO code output from the ISO conversion unit 5 via the external reading terminal 40 to determine sensor failure information and make a diagnosis. It is a thing.

Therefore, the MIL 7 is a judgment / diagnosis tester 8
It is only necessary to simply indicate that one of the sensors has a failure so that the failure diagnosis can be promoted. Where A
A specific example of the failure detection method for the T-state detection sensor 11 is shown in Table 1 below.

[0045]

[Table 1]

The operation of the failure judging device according to the first embodiment of the present invention having the above structure will be described below with reference to the flow chart shown in FIG. The AT control unit 15 controls the AT as a predetermined component based on the information from the AT state detection sensor 11 (step A1), while the failure determination unit 13 causes the AT state detection sensor 11 to operate.
It is determined whether the AT state detection sensor 11 is out of order by inputting the signal from (step A
2).

When it is determined that the AT state detection sensor 11 has a failure (YES route in step A2), the failure determination unit 13 sends a failure detection signal indicating that to the code conversion unit 14. Output (Step A
3). When the code conversion unit 14 receives the failure detection signal from the failure determination unit 13, the failure detection signal is coded and stored according to the conversion law peculiar to the conversion unit 14, and the code signal is output to the output port 21 and the control unit. It outputs to the ISO conversion part 5 via the signal line 19 and the input port 23 (step A4).

The engine control unit 6 controls the state of the engine as another component based on the information from the engine operating state detection sensor 1 (step A5), while the failure determining unit 3 controls the engine operating state. The signal from the detection sensor 1 is input and it is determined whether or not the engine operating state detection sensor 1 is out of order (step A
6).

If it is determined that the engine operating state detection sensor 1 is out of order (YES in step A6).
S route), the failure determination unit 3 outputs a failure detection signal indicating that fact to the code conversion unit 4 (step A).
7). In the code conversion unit 4, when the failure detection signal from the failure determination unit 3 is received, the failure detection signal is coded and stored according to the conversion law peculiar to the conversion unit 4, and the code signal is stored in the ISO conversion unit 5. It outputs to (step A8).

In the ISO conversion unit 5, the engine operating state detection sensor 1 and the engine control unit 2 which have been code-converted by the code conversion unit 4 or the code conversion unit 14 described above.
Alternatively, the AT state detection sensor 11 and the AT control unit 1
Convert the failure information of No. 2 into ISO code (Step A
9).

In the MIL 7, the ISO code from the ISO conversion means 5 is received, and failure information of the engine operating state detection sensor 1, the engine control unit 2 or the AT state detection sensor 11, AT control unit 12 is notified by an alarm or the like to the driver. To inform. Further, the judgment / diagnosis tester 8 reads the ISO code output from the ISO conversion section 5 through the external reading terminal 40 to judge and diagnose the failure information (step A10).

Therefore, the engine control unit 2 is provided with an ISO conversion section 5 for converting the ISO information to the ISO code for outputting the failure information to the MIL 7 and the judgment / diagnosis tester 8.
By arranging only one of them, it is possible to efficiently output a coded signal that conforms to the designated communication method, and as a result, there is an advantage that the configuration can be simplified and the cost increase can be minimized. .

(B) Description of Second Embodiment FIG. 2 is a block diagram showing a failure diagnosis device according to a second embodiment of the present invention. The failure diagnosis device shown in FIG. Similar to the above case, when an AT (automatic transmission) -equipped vehicle is used and AT control or engine control that deteriorates the components of exhaust gas is performed, electronic component failure that is considered to be the cause is caused. In this case, the sensor code information can be determined by reading the ISO code, and in addition to the ISO code, the engine control unit 2 and the AT control unit 1 can be used.
2 is different in that the sensor failure information can be determined by reading a signal (a code signal converted by the above-mentioned code conversion units 4 and 14) that is compatible with the communication system peculiar to the system used.

That is, in FIG. 2, 12 is AT
The AT control unit 12, which is a control unit, can control the AT based on the information from the AT state detection sensor 11 and detect a failure of the AT state detection sensor 11 as in the case of the first embodiment. The failure determination unit 13 and the code conversion unit 14 similar to those in the first embodiment.
And the AT control unit 15.

The code converting section 14 is connected to the external reading terminal 41 via the input / output port 26 and the control signal line 39, and the AT control unit 12 is also provided.
It is connected to the analysis unit 31 in the engine control unit 2 via the input / output port 27 on the side, the control line 9 and the input / output port 28 on the side of the engine control unit 2.

The external read terminal 41 is also connected to the code conversion section 4 of the engine control unit 2 which will be described later via the input / output port 30 so that the second judgment / diagnosis tester 32 can be connected. There is.

Therefore, the coded signal from the code conversion section 14 relating to the failure of the AT state detection sensor 11 is output to the second judgment / diagnosis tester 32 through the input / output port 26 and is input. Output port 2
7, the control signal line 9, and the input / output port 28 to output to the analysis unit 31.
The T control unit 12 and the engine control unit 2 are capable of exchanging the failure detection information with a signal coded by a conversion law peculiar to each code conversion unit.

Further, with respect to the AT control section 15 as well, the analysis section 3 in the engine control section 6 is provided by way of the input / output port 27, the control signal line 9 and the input / output port 28.
The control information between the AT control unit 12 and the engine control unit 2 can be exchanged by a signal peculiar to the system. Further, the engine control unit 2 controls the engine based on the information from one or more engine operating state detecting sensors 1 for detecting the operating state of the engine, as in the first embodiment, and the operating state detecting sensor for the engine. It is capable of detecting the failure of No. 1 and comprises a failure determination section 3, a code conversion section 4, an ISO conversion section 5, an engine control section 6 and an analysis section 31.

Here, the failure determination unit 3, the code conversion unit 4,
Since the ISO conversion unit 5 and the engine control unit 6 have substantially the same functions as those of the first embodiment, their description will be omitted. In addition, the analysis unit 31 includes the AT control unit 12
By inputting the coded signal from the code conversion unit 14 and the control signal from the AT control unit 15 and analyzing these signals, the type of signal (the signal from the code conversion unit 14 or the AT The signal from the controller 15) is determined.

When it is determined that the signal input to the analysis unit 31 is from the code conversion unit 14,
The signal is output to the ISO conversion unit 5 and the AT
When it is determined that the data is from the control unit 15, it is output to the engine control unit 6. further,
Judgment / diagnosis tester (second judgment / diagnosis means) 3 which is detachably attached to the external reading terminal 41 described above.
2, the code signal from the code conversion unit 4 is input through the input / output port 30 and the control signal line 49, and the failure information of the engine operating state detection sensor 1 is determined and diagnosed. A code signal is input via the input / output port 26 and the control signal line 39, and by reading these signals, the failure information of the AT operating state detection sensor 11 is determined and diagnosed.

The MIL connected to the ISO converter 5
7. A first tester for judgment / diagnosis (first judgment / diagnosis means) 8 connected to the ISO converter 5 via an input / output port 29.
A is the MIL 7 in the first embodiment, the judgment /
Since it has the same function as the diagnosis unit 8, the description thereof will be omitted. With the above configuration, the failure diagnosis apparatus according to the second embodiment of the present invention operates as follows.

That is, the engine control section 6 controls the engine state based on the information from the engine operating state detecting sensor 1. However, the failure determining section 3 receives the signal from the engine operating state detecting sensor 1 as an input. , It is determined whether the engine operating state detection sensor 1 is out of order. Here, when it is determined that the engine operating state detection sensor 1 is out of order, the code conversion unit 4 encodes a signal to that effect by a conversion law specific to the conversion unit 4 and stores the code signal. ISO conversion unit 5,
The data is output to the second determination / diagnosis tester 32 via the input / output port 30 and the control signal line 49, respectively.

Further, the AT control section 15 controls the AT based on the information from the AT state detection sensor 11, and the control signal can be output to the engine control section 6 in the engine control unit 2 via the analysis section 31. Further, the failure determination unit 13 receives a signal from the AT state detection sensor 11 to determine whether the AT state detection sensor 11 is out of order.

When it is determined that the AT state detection sensor 11 is out of order, a signal to that effect is coded by the code conversion unit 14 according to the conversion law unique to the conversion unit 14 and stored. The code signal is output to the analysis unit 31 via the output port 27, the control signal line 9 and the input port 28, respectively. The same code signal is also output to the second judgment / diagnosis tester 32 via the input / output port 26 and the control signal line 39.

In the ISO conversion section 5, the engine operation state detection sensor 1, the engine control unit 2 or the AT state coded by the code conversion section 4 or the code conversion section 14 according to the conversion law peculiar to each code conversion section. Fault information (fault detection signal) of the detection sensor 11 and the AT control unit 12 is converted into an ISO code.

The MIL 7 receives an output signal (failure signal) from the ISO conversion means 5 according to the communication method of the ISO code, and receives the engine operating state detection sensor 1, the engine control unit 2 or the AT state detection sensor 11, A.
The driver is notified of failure information of the T control unit 12 by an alarm or the like. Furthermore, the first tester 8A for judgment / diagnosis
Reads a signal conforming to the communication method of the ISO code output from the ISO conversion unit 5 through the external reading terminal 40 to determine sensor failure information and make a diagnosis.

In the second judgment / diagnosis tester 32,
A signal encoded by the conversion law peculiar to each code conversion unit, which is output from the code conversion unit 4 or the code conversion unit 14, is read through the existing external reading terminal 41, and the determination / diagnosis first tester 8A is provided. The same determination and diagnosis of sensor failure information can be performed. Therefore, in order to output the sensor failure information to the MIL 7 or the first judgment / diagnosis tester 8A, the signal is converted into an ISO code I.
Since only one SO conversion unit 5 needs to be mounted on the engine control unit 2, it is possible to efficiently output a coded signal that conforms to the specified communication method and to suppress an increase in cost. To be

Further, since the second tester 32 for judgment / diagnosis for judging / diagnosing the sensor failure is provided by using the signal coded by the conversion law peculiar to each code conversion unit, the existing external reading terminal 41 is provided. Since the sensor failure information can be read by, the conventionally used tester (that is, the tester unique to each company) can be used as it is.

The control signal line 9 is shared when the coded signal from the code conversion unit 14 and the cooperative control signal from the AT control unit 15 are output to the analysis unit 31. Therefore, it can contribute to further suppression of cost increase. In the present embodiment, the sensor failure information is determined and diagnosed by the first determination / diagnosis tester 8A, and the sensor failure information is determined / diagnosed by the second determination / diagnosis tester 32. However, according to the failure diagnosis device of the present invention,
The diagnosis by the second diagnostic tester 32 may be omitted, and in this case, the block diagram showing the failure diagnosis device of the present invention is as shown in FIG.

(C) Others In each of the above-mentioned embodiments, the failure determination section 13 of the AT control unit 12 is adapted to detect the failure of only the AT state detection sensor 11, but the invention is not limited to this. AT
By providing a system for detecting the failure of the control unit 12 itself, the failure of the AT control unit 12 itself can also be detected.

Similarly, the failure determination unit 3 of the engine control unit 2 is designed to detect the failure of only the engine state detection sensor 1, but the invention is not limited to this, and the failure of the engine control unit 2 itself is also detected. can do. Further, in each of the above-described embodiments, the engine control unit 2 converts the signal into a signal conforming to the ISO code communication system. However, according to the failure diagnosis apparatus of the present invention, the AT control unit 12 side is converted to ISO. There is no problem even if a section is provided and converted into a signal compatible with the ISO code communication system.

In each of the above-described embodiments, the AT control unit 12 is connected to the engine control unit 2 and the failure of the AT state detection sensor 11 is output to the engine control unit 2. If there are multiple control units such as a traction control control unit (TCL control unit), an ABS control unit, a power steering control unit, etc.
Similar to the T control unit 12, it may be connected to the engine control unit 2 and the failure of the sensors connected thereto may be output to the engine control unit 2. In this case, the IS provided in the engine control unit 2
The O conversion unit 5 needs to have a large capacity.

As shown in FIG. 5, all the units are not connected to the engine control unit 2, but a plurality of control units are divided into some blocks, and the ISO conversion section 5 is provided only in a predetermined control unit. May be. According to this configuration, the ISO conversion unit 5 does not need to have a large capacity as in the case described above. That is, as shown in FIG. 5, all the units are not connected to the engine control unit 2, and, for example, the AT control unit 12, the TCL control unit 51 and the engine control unit 2 are connected to the first block 5
2, the power steering control unit 53 and AB
With the S control unit 54 as the second block 55, the ISO converter 5 can be provided in each of the first block 52 and the second block 55, for example, in the engine control unit 2 and the ABS control unit 54.

In each of the above embodiments, MIL7 is set to I
Although connected to the SO conversion unit 5, the MIL 7 may be connected to the code conversion units 4 and 14 or the failure determination units 3 and 13 to be turned on. In the case of the second embodiment, the analysis unit 3
1 is provided, the analysis unit 3 is provided as shown in FIG.
1 and the failure determination unit 3 are arranged so as to be connected to each other via the input / output port 28.

Furthermore, in each of the above-described embodiments, the failure of the electronic component that deteriorates the exhaust gas has been described as an example, but the invention is not limited to this, and the invention can also be used for detecting the failure of any electronic component mounted in a vehicle.

[0076]

As described in detail above, the inventions according to claims 1 to 3, 7
According to the invention described in 1 to 9, the first operating state detecting means, the second operating state detecting means, the first control device, the second control device, the first failure detecting means, and the first failure signal outputting means. By providing the second failure detection means, the second failure signal output means, the conversion means, the determination / diagnosis means, and the notification means, the signal line can be shared and the designated communication method can be realized. It is possible to output a suitable encoded signal efficiently,
As a result, there is an advantage that the configuration can be simplified and cost increase can be minimized.

Further, according to the present invention as defined in claims 4, 5, 10 and 11, since it is provided with the second judging / diagnosing means, it is coded by the conversion law peculiar to the first and second failure detecting means. It is possible to judge and diagnose the sensor failure using the signal, and to read the sensor failure information with the existing external reading terminal, so the conventional tester (that is, the tester unique to each company) can be used as it is. Therefore, there is an advantage that it can contribute to further suppression of cost increase.

Further, in the invention according to claims 6 and 12, the first control device is an engine control device for controlling an engine mounted on the vehicle, and the second control device is an automatic control device connected to the engine. By using the transmission control device for controlling the transmission, when AT control and engine control that deteriorate the components of exhaust gas are performed,
There is an advantage that a faulty electronic component considered to be the cause can be detected and notified, and AT or the engine can be appropriately controlled while maintaining high reliability.

[Brief description of drawings]

FIG. 1 is a block diagram showing a failure diagnosis device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a failure diagnosis device according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a failure diagnosis device as a modification of the second embodiment of the present invention.

FIG. 4 is a signal sequence diagram showing a failure detection signal for each sensor.

FIG. 5 is a block diagram showing a failure diagnosis device according to another embodiment of the present invention.

FIG. 6 is a block diagram showing a failure diagnosis device as a modification of the second embodiment of the present invention.

FIG. 7 is a flow chart for explaining the operation of the failure diagnosis device in the first embodiment of the present invention.

[Explanation of symbols]

1 engine operating state detection sensor (first operating state detecting means, engine operating state detecting means) 2 engine control unit (first control device, engine control device) 3 failure determination section (first failure detection means) 4 code conversion section ( 1st failure signal output means) 5 ISO conversion part (conversion means) 6 Engine control part 7 MIL (notification means) 8 Judgment / diagnosis part (judgment / diagnosis means) 8A 1st tester for judgment / diagnosis (first judgment / diagnosis) Means) 9 control signal line 11 AT state detection sensor (second operating state detecting means, transmission operating state detecting means) 12 AT control unit (second control device, transmission control device) 13 failure determination unit (second failure detection) 14) Code conversion unit (second failure signal output unit) 15 AT control unit 19 Control signal lines 21 to 30 Input / output port 31 Analysis unit 32 Second determination / diagnosis Tester (second determination / diagnosis means) 39 Control signal line 40, 41 External reading terminal 49 Control signal line 51 TCL control unit 52 First block 53 Power steering control unit 54 ABS control unit 55 Second block

Front Page Continuation (72) Inventor Masakazu Kinoshita 533-8, Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation

Claims (13)

[Claims] 1. A first driving state detecting means for detecting a driving state of a predetermined constituent element among vehicle constituent elements mounted on a vehicle, and another one different from the predetermined constituent element among the plurality of vehicle constituent elements. Second operating state detecting means for detecting an operating state of a component, a first controller for controlling the predetermined component based on an output from the first operating state detecting means, and a second operating state detecting means A second control device for controlling the predetermined constituent elements based on an output from the first operating state detecting means, the second operating state detecting means, the first operating state detecting means,
A failure diagnosis device for a vehicle control device for diagnosing a failure of one of a control device and a second control device, the device being disposed in the first control device, the first control device or the first operating state detecting means. A first failure detecting means for detecting a failure, and the second controller provided in the first controller, and receiving a failure detection signal from the first failure detector as a failure signal unique to the first controller. First failure signal output means for outputting to the second control device, second failure detection means arranged in the second control device for detecting a failure of the second control device or the second operating state detection means, and the second control Second fault signal output means disposed in the device and receiving a fault detection signal from the second fault detection means as a fault signal specific to the second control device; and, disposed in the second control device. The first failure signal output Means and the second failure signal output means for receiving the failure signal from the second failure signal output means, and converting means for converting each failure signal into a signal compatible with a predetermined communication method; and a signal compatible with the predetermined communication method by the conversion means. The failure signal changed to the above is read, and the above-mentioned first operating state detecting means, second operating state detecting means, first control device, second
A failure diagnosis device for a vehicle control device, comprising: a judgment / diagnosis means for judging and diagnosing a failure of any one of the control devices. 2. The vehicle control apparatus according to claim 1, further comprising an informing means for informing that when the first control device or the first operating state detecting means is out of order. Fault diagnosis device. 3. The vehicle control apparatus according to claim 1, further comprising an informing means for informing that when the second control device or the second operating state detecting means is out of order. Fault diagnosis device. 4. A second judgment / diagnosis means for reading a failure signal from the first failure signal output means and judging and diagnosing a failure of the first control device or the first operating state detecting means. The failure diagnosis device for a vehicle control device according to claim 1, wherein: 5. A second judgment / diagnosis means for reading a failure signal from said second failure signal output means and judging and diagnosing a failure of said second control device or said second operating state detecting means. The failure diagnosis device for a vehicle control device according to claim 1, wherein: 6. One of the engine control device for controlling an engine mounted on the vehicle and the automatic transmission coupled to the engine is a first control device, and the other is a second control device. The failure diagnosis device for a vehicle control device according to claim 1, which is characterized in that. 7. The second control device is connected to at least one control device of a traction control control device, an ABS control device and a power steering control device, to which a driving condition detection means for detecting a driving condition is connected. It is configured to output failure detection information in a control device connected to the second control device or an operating state detection means connected to the control device connected to the second control device to the second control device. The failure diagnosis device for a vehicle control device according to claim 1, which is characterized in that. 8. A first driving state detecting means for detecting a driving state of a predetermined constituent element among vehicle constituent elements mounted on a vehicle, and a driving state of another constituent element among the plurality of vehicle constituent elements. A second operating state detecting means, a first control device for controlling the predetermined component based on an output from the first operating state detecting means, and the above based on an output from the second operating state detecting means. A second control device for controlling predetermined components, the first operating state detecting means, the second operating state detecting means, and the first operating state detecting means.
A failure diagnosis method for a vehicle control device for diagnosing a failure of one of a control device and a second control device, wherein a failure of the first control device or the first operating state detection means is detected and a failure detection signal is output. When receiving the failure detection step and the failure detection signal from this failure detection step,
A failure signal output step of outputting to the second control apparatus as a failure signal specific to the first control apparatus, and a failure of detecting a failure of the second control apparatus or the second operating state detecting means and outputting a failure detection signal. When the detection step and the failure detection signal from this failure detection step are received,
A failure signal output step of outputting as a failure signal unique to the second controller, the failure signal unique to the first controller and the failure signal unique to the second controller are received, and each failure signal is transmitted in a predetermined communication method. Signal conversion step for converting into a signal conforming to the above, and a failure signal converted into a signal conforming to the above-mentioned predetermined communication method is read, and the first operating state detecting means, the second operating state detecting means and the first control device are read. And a failure diagnosing step of deciding and diagnosing a failure of any one of the second control device and the second control device. 9. A failure notification step of notifying that the first control device or the first operating state detecting means has a failure based on a failure signal changed to a signal compatible with the predetermined communication method. 9. The method according to claim 8, further comprising:
A method for diagnosing a failure of the vehicle control device described. 10. A failure notification step of notifying that the second control device or the second operating state detecting means has a failure based on a failure signal changed to a signal compatible with the predetermined communication method. The fault diagnosis method for a vehicle control device according to claim 8, wherein the fault diagnosis method is provided. 11. A failure diagnosis step of reading a failure signal specific to the first control device output in the failure signal output step, and determining and diagnosing a failure of the first control device or the first operating state detecting means. The failure diagnosis method for a vehicle control device according to claim 8, wherein 12. A failure diagnosis step of reading a failure signal specific to the second control device output in the failure signal output step, and determining and diagnosing a failure of the second control device or the second operating state detecting means. The failure diagnosis method for a vehicle control device according to claim 8, wherein 13. A transmission operating state detecting means for detecting an operating state of an automatic transmission connected to an engine mounted on a vehicle, and an engine operating state detecting means for detecting an operating state of an engine mounted on the vehicle. And a transmission control device for controlling an automatic transmission connected to the engine, and an engine control device for controlling an engine mounted on the vehicle. A failure diagnosis method for a vehicle control device for diagnosing a failure of any one of a transmission control device, a transmission control device, and an engine control device. When the failure detection step of outputting a signal and the failure detection signal of this failure detection step are received,
A failure signal output step of outputting as a failure signal specific to the transmission control device; a failure detection step of detecting a failure of the engine control device or the engine operating state detection means and outputting a failure detection signal; When the failure detection signal by
The failure signal output step of outputting to the transmission control device as a failure signal peculiar to the engine control device, the failure signal peculiar to the transmission control device and the failure signal peculiar to the engine control device are received, and each failure signal is received. A signal conversion step of converting into a signal compatible with a predetermined communication system, and a failure signal converted into a signal compatible with the predetermined communication system are read, and the transmission operating state detecting means, the engine operating state detecting means, and the gear shifting are performed. A failure diagnosis method for a vehicle control device, comprising: a failure diagnosis step of determining and diagnosing a failure of one of the machine control device and the engine control device.