JPH09273447A - Processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discriminate a kind of a controlled device before control is carried out so as to reduce an influence on the controlled device even if an abnormal condition is caused in information for discriminating a kind of the controlled device. SOLUTION: If an identification code read from EEPROM 53 differs from an identification code based on an identification signal given to an input terminal 54, a control circuit 76 selects the identification code for a vehicle of a higher priority kind in the two identification codes and decides a regeneration time so that solid particles collected in a DPF 6 are reduced even if the identification codes does not matches mutually. Therefore, deterioration in solid particle collecting efficiency in the DPF 6 can be prevented when a vehicle starts traveling next time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing device that performs control corresponding to a plurality of types of controlled devices.

[0002]

2. Description of the Related Art The exhaust gas of a diesel engine contains solid fine particles called diesel particulates. The solid fine particles include soot, hydrocarbons, metal particles generated when fuel is burned in a diesel engine, unburned fuel left unburned in a diesel engine, and the like. A diesel particulate filter (Diesel Particulate Filter; hereinafter abbreviated as "DPF"), which is a filter for collecting diesel particulates, collects solid particulates while the vehicle is traveling. When the vehicle is stopped, the collected solid fine particles are heated and burned to be removed, and the DPF is regenerated so that the solid fine particles can be collected again. At this time, the amount of solid particulates collected by the filter is determined by the value of the inflow air pressure of the air flowing into the internal combustion engine and the pressure determined by the difference between the back pressure between the internal combustion engine and the DPF and the atmospheric pressure. The value and is estimated as a parameter. The inflow air pressure and the back pressure for obtaining the parameters for setting the DPF regeneration condition are measured by, for example, a sensor. The regeneration condition of the DPF, that is, the amount of heat applied to the filter and the heating time of the filter are set according to the estimated amount of collected solid fine particles. The estimated collection amount of the solid fine particles and the collection time which is the time from one reproduction to the next reproduction are sequentially stored in a memory or the like.

Recently, vehicles are often provided with an ECU (Electric Control Unit) for controlling the operation of an engine or the like. In the case of a vehicle equipped with a diesel engine, an ECU that controls the regeneration device of the DPF is provided. When regenerating the DPF,
The ECU estimates the amount of solid fine particles collected by the DPF based on the value measured by the sensor, and determines the regeneration time and the like. The ROM (Read Only Memory) included in the ECU previously stores the amount of solid fine particles in association with the output of the sensor. The ROM stores a map in which the outputs of the sensors and the amounts of solid fine particles for a plurality of vehicle types are associated with each other in order to mass-produce the ROMs by using them in common for a plurality of vehicle types and reduce the manufacturing cost of the ROM. Has been done, E
The CU refers to a map corresponding to the type of vehicle and estimates the amount of solid particles based on the value measured by the sensor.

[0004]

In the above-mentioned ECU, the vehicle type is generally discriminated based on the vehicle type discriminating signal given when the power is turned on. However, the signal line to which the signal is supplied is, for example, broken. In that case, there is a problem in that the ECU estimates the amount of solid fine particles trapped in the DPF by referring to a map for a vehicle of a type different from the vehicle actually mounted.

When the amount of solid fine particles is estimated by referring to a map for a vehicle of a type different from the vehicle actually mounted, the amount of solid fine particles actually collected by the DPF and the estimated amount of solid fine particles are calculated. If a difference is caused and it is estimated that the amount of the solid fine particles is small, the solid fine particles cannot be completely removed even if the DPF is regenerated, and the collection efficiency of the solid fine particles in the DPF is reduced or a failure occurs. There is a risk. In addition, when the amount of the solid fine particles is estimated to be large, there is a case where the DPF is melted due to an excessive amount of heat applied to the DPF when the DPF is regenerated.

Further, the ECU is equipped with an EEPROM (electrically writable and erasable read-only memory),
In the ECU that writes the type of the vehicle in which the ECU is mounted in the EPROM and reads the contents of the EEPROM when the power is turned on to determine the vehicle type, the information for determining the vehicle type written in the EEPROM may be rewritten. The above problems cannot be solved.

An object of the present invention is to discriminate the type of the controlled device so that the influence on the controlled device is reduced even when the information for discriminating the type of the controlled device is abnormal. It is to provide a processing device capable of performing control.

[0008]

According to the present invention, a plurality of types of controlled devices are commonly used, and a plurality of types of controlled devices are operated by using control information determined for each type. A first memory for storing the operating conditions of the controlled device for each type, a rewritable second memory for storing the type of the controlled device to be controlled by the processing device, one or more connection terminals, When it is determined that the type of the controlled device determined based on the signal applied to the connection terminal corresponding to the type of the control device and the type of the controlled device stored in the second memory are the same, the same. The controlled device is operated with the information for the control corresponding to the type of the controlled device determined to be, and when it is determined that they are not the same, the controlled device is operated with the information for the predetermined control. Control Characterized in that it comprises a means. According to the present invention, when the control means determines that the type of the controlled device determined based on the signal given to the connection terminal and the type of the controlled device stored in the second memory are the same, The controlled device is operated by the information for control corresponding to the type of the controlled device. Further, when it is determined that they are not the same, the controlled device is operated by the information for predetermined control. Therefore, even if the type of the controlled device determined based on the signal applied to the connection terminal and the type of the controlled device stored in the second memory are different, the information for the predetermined control is used. Since the controlled device is operated, the controlled device does not need to be operated by setting different control information based on the information indicating the different controlled device types. It is possible to prevent the controlled device from being operated on the basis of information for improper control.

Each operating condition stored in the first memory of the present invention has a priority order, and the control means is based on a signal given to the connection terminal corresponding to the type of the controlled device. When it is determined that the type of the controlled device determined by the above is not the same as the type of the controlled device stored in the second memory, based on the signal given to the connection terminal corresponding to the type of the controlled device. Of the information for control corresponding to the type of the controlled device defined according to the control information and the information for control corresponding to the type of the controlled device stored in the second memory, the priority is determined to be high. The controlled device is operated by using the existing information. According to the invention, when the control means determines that the type of the controlled device determined based on the signal given to the connection terminal is not the same as the type of the controlled device stored in the second memory, The controlled device is operated by using the information having a high priority. Therefore, even if the type of the controlled device determined based on the signal applied to the connection terminal and the type of the controlled device stored in the second memory are different, the controlled device is controlled by the information with high priority. Since the device is operated, it is possible to prevent the controlled device from being operated based on information for improper control.

The control means of the present invention includes a type of a controlled device determined based on a signal applied to a connection terminal,
When it is determined that the type of the controlled device stored in the second memory is not the same as the type of the controlled device stored in the first memory, the information for the control having the highest priority among the information stored in the first memory for each control is selected. The controlled device is operated by the information. According to the present invention, when the processing device determines that the type of the controlled device determined based on the signal applied to the connection terminal and the type of the controlled device stored in the second memory are not the same. , Of the operating conditions stored in the first memory, the controlled device is operated according to the information for control having the highest priority. Therefore, even if the type of the controlled device determined based on the signal applied to the connection terminal and the type of the controlled device stored in the second memory are different, they are still stored in the first memory. Since the controlled device can be operated by the information for the control with the highest priority among the operating conditions, the controlled device is controlled based on the information indicating the different controlled device types and the possibility that an abnormality has occurred. It is possible to prevent the controlled device from being operated based on an unsuitable kind of operating condition without setting the information for the controlled device to operate.

According to the present invention, the type of the controlled device determined based on the signal applied to the connection terminal corresponding to the type of the controlled device and the type of the controlled device stored in the second memory are the same. When it is determined that the two do not match, a display means for displaying a mismatch is included. According to the present invention, the display means included in the processing device is stored in the second memory and the type of the controlled device which is determined based on the signal given to the connection terminal corresponding to the type of the controlled device. When it is determined that the types of controlled devices are not the same, a display indicating that they do not match is displayed. Therefore, the user of the processing device can determine whether or not the information for determining the type of the controlled device is abnormal by observing the display of the display means, and the user can be informed that the abnormality has occurred. Can be displayed to prompt processing for removing the abnormality.

The controlled device of the present invention is provided in a discharge path of exhaust gas of a diesel engine, and collects solid fine particles in exhaust gas discharged from the diesel engine, and heats the filter. A diesel particulate filter means including an electric heater for burning and removing solid fine particles, and a back pressure detecting means for detecting a back pressure which is a pressure on an upstream side in an exhaust gas inflow direction with respect to the filter is provided, In the first memory, the back pressure and the amount of solid fine particles collected by the filter are stored in association with each other as information for the control, and the control means is the back pressure detection means. Based on the back pressure detected by, the collection amount of the solid fine particles collected by the filter is read out from the first memory, and the read collection amount is obtained. Zui seeking calculates the heating time required to burn the trapped solid particulate, and supplying power to the electric heater only the heating time. According to the present invention, the processing device is controlled based on the type of diesel particulate filter means determined based on the signal applied to the connection terminal and the type of diesel particulate filter means stored in the second memory. The type of diesel particulate filter means is determined, the first memory is referred to in correspondence with the type of diesel particulate filter means, and the trapped amount trapped by the filter is calculated based on the back pressure. Based on this, the heating time required to burn the collected solid fine particles is calculated and obtained, and electric power is supplied to the electric heater for the heating time. Therefore, depending on the type of diesel particulate filter means determined based on the signal given to the connection terminal and the type of diesel particulate filter means stored in the second memory, electric power is supplied to the electric heater of the diesel particulate filter means. Of the diesel particulate filter means to be controlled, and the processing device can perform control corresponding to the type of diesel particulate filter means to be controlled. Since the back pressure and the trapped amount stored in the first memory are determined according to the type of diesel particulate filter means, the time for heating the filter is short and solid particulates are completely removed. It is possible to prevent the filter from remaining unburned, and the solid particulate collection efficiency of the filter to be lowered, or the filter from being melted by giving too much.

The priority of the present invention is such that, when the back pressure is the same, the priority of the type of diesel particulate filter means having a large amount of solid particulates collected by the filter becomes high. It is characterized by being determined. According to the invention, the priority of the types of diesel particulate filter means stored in the first memory is that the diesel particulate filter collects a large amount of solid particulates when the back pressure is the same. The priority of the means is determined to be high. Therefore, the type of diesel particulate filter means determined based on the signal given to the connection terminal, and the second
Even if the type of diesel particulate filter means stored in the memory indicates a different type, the time to heat the filter by controlling the diesel particulate filter means as the diesel particulate filter means of a higher priority type. Is not sufficient, and the solid fine particles remain unburned, so that it is possible to prevent deterioration of the collection efficiency of the filter.

The present invention provides a filter which is provided in an exhaust gas exhaust path for exhausting exhaust gas from a diesel engine and collects solid particles in the exhaust gas, and a solid collected by the filter by heating the filter. Diesel particulate filter means including an electric heater for burning fine particles, and a back pressure detection means for detecting a back pressure which is a pressure in a space on the upstream side in the exhaust gas inflow direction with respect to the filter in the discharge path, A connection terminal, a voltage supply means for applying a voltage corresponding to the type of diesel particulate filter means to the connection terminal, for each type of diesel particulate filter means, a back pressure detected by the back pressure detection means, and A read-only memory that stores the amount of solid particulates collected by the filter in association with And electrically writing erasable programmable read-only memory that kind of should do diesel particulate filter means has been previously stored,
When it is determined that the type of diesel particulate filter means determined based on the voltage applied to the connection terminal is the same as the type of diesel particulate filter means stored in the programmable read only memory, the lead The collection amount of the diesel particulate filter means stored in the only memory and determined to be the same is obtained by reading from the read only memory corresponding to the back pressure. A predetermined collection amount is obtained corresponding to the pressure, and the heating time required to burn the collected solid fine particles is calculated based on the obtained collection amount, and the electric heater is used for the heating time. And a control means for supplying electric power to the diesel particulate filter. It is a filter of the playback device. According to the invention, the control means is a type of diesel particulate filter means determined based on the voltage applied to the connection terminal, and a diesel particulate filter means stored in an electrically programmable erasable programmable read only memory. The type of diesel particulate filter means to be controlled based on the type and the type of diesel particulate filter means is determined, the read-only memory is referred to in correspondence with the type of diesel particulate filter means, and the collection collected in the filter is based on the back pressure. The amount is calculated, the heating time required to burn the solid fine particles collected by the filter is calculated based on the collected amount, and electric power is supplied to the electric heater for the heating time. Therefore, depending on the type of diesel particulate filter means defined based on the voltage applied to the connection terminal and the type of diesel particulate filter means stored in the programmable read-only memory, the diesel particulate based on the back pressure is used. The time for supplying electric power to the electric heater of the filter means can be determined, and the control means can perform control corresponding to the type of diesel particulate filter means to be controlled. Since the back pressure and the trapped amount stored in the read-only memory are determined according to the type of diesel particulate filter means, the time for heating the filter is short and solid particles are completely removed. It is possible to prevent the filter from remaining unburned, and the solid particulate collection efficiency of the filter to be lowered, or the filter from being melted by giving too much.

[0015]

1 is a block diagram showing a structure of a control circuit 26 and an exhaust path 3 of a diesel engine (hereinafter abbreviated as "engine") 2 according to a first embodiment of the present invention. .

The control circuit 26 includes a CPU 50 and a RAM.
(Random access memory) 51, ROM 52, E
It is configured to include an EPROM 53 and a conversion circuit 55. The RAM 51 is a memory for temporarily storing the result of calculation performed by the CPU 50. RO
In M52, a so-called map for estimating the amount of solid particulates to be described later is stored in advance. Details of the map will be described later. In the EEPROM 53,
An identification code, which will be described later, for determining the type of vehicle in which the control circuit 26 is mounted is stored.

The control circuit 26 is provided with input terminals 54a, 54b, 54c to which an identification signal for determining the type of vehicle in which the control circuit 26 is mounted is input. The identification signal is given to the conversion circuit 55 via the input terminals 54a, 54b, 54c. The conversion circuit 55 creates an identification code based on the three parallel identification signals, and the CPU 50
Output to

The states of the input terminals 54a, 54b, 54c are determined depending on whether a high level signal is applied or the input terminals 54a, 54b and 54c are in an open state in which they are not connected to any voltage. The high level signal given to the input terminal 54 is
For example, it is a voltage VB of, for example, 5V output from voltage circuit 61.

Exhaust gas discharged from the engine 2 is guided to the DPF 6 via the conduit 5. The exhaust gas that has passed through the DPF 6 is introduced into the muffler 9 via the pipe 8 after the smoke is removed by the heater 7. Exhaust gas is muffler 9
After being subjected to the sound deadening process in (1), it is discharged to the outside through the conduit 10.

In addition to exhaust gas, air is introduced into a pipe line 5 between the engine 2 and the DPF 6. This air is mixed only when the DPF 6 is regenerated in order to quickly perform ignition when the DPF 6 is regenerated, which will be described later. After the air introduced is purified by the air cleaner 13,
It is introduced into the pipe line 16 connected to the pipe line 5 via the air pump 14 and the valve 15.

A heater 18 is provided near the DPF 6 in the conduit 5. A heat reflection plate 19 is provided in the vicinity of the heater 18 of the pipe line 5 and on the upstream side in the exhaust gas inflow direction. As will be described later, the heater 18 is used to burn and remove the solid fine particles collected in the DPF 6 to regenerate the DPF 6. The signal U1 output by the user operating the input device 63 is supplied to the control circuit 26, whereby the DPF 6 is regenerated.

The battery 28 supplies electric power to the voltage circuits 61 and 62 via the main relay circuit 27. The control circuit 26 controls conduction / interruption of the main relay circuit 27. The voltage circuit 61 converts the voltage of the electric power supplied from the battery 28 from, for example, 12V to 5V and supplies the voltage to the control circuit 26. The voltage circuit 62 is connected to the battery 28.
The voltage of the electric power supplied from
Converted to 0V and output. Electric power is supplied to the heater 18 and the heater 7 from the battery 28 via the heater relay circuits 22 and 23 and the voltage circuit 62, respectively.

The control circuit 26 includes an ignition (I
G) The output from the switch 31 is given. Control circuit 2
6 is a starter relay circuit 3 in response to the given output.
2 is controlled and the starter motor is driven to start the engine 2. Furthermore, the control circuit 26 controls the display device 34 to display the amount of solid fine particles trapped in the DPF 6 and the failure portion.

The control circuit 26 also includes an air cleaner 13
An output obtained by measuring the amount of inflow air of the air introduced into the air pump 14 is provided from a flow rate sensor 37 installed in a pipe line 36 that connects the air pump 14 with the air pump 14. Control circuit 2
Reference numeral 6 controls the air pump 14 and the valve 15 based on the value measured by the flow rate sensor 37 to control the pipeline 5
Controls the amount of inflow of air introduced into the.

The engine 2 is provided with a sensor 39 for measuring the intake air pressure of the engine. A back pressure sensor 41 for measuring the back pressure of the exhaust gas introduced into the pipelines 5, 16 between the engine 2 and the DPF 6 is installed in the pipeline 16 connected to the pipeline 5. There is. Further, a temperature sensor 43 is installed between the heater 18 and the DPF 6. The outputs of the sensors 39, 41, 43 are given to the control circuit 26. The control circuit 26 uses the sensors 39, 4
Based on the outputs of 1, 43, the regeneration condition of the DPF 6 is determined as will be described later, and the heater relay circuit 22 conducts electricity /
Control the interruption.

A control method for determining the regeneration condition of the DPF 6 in the exhaust path 3 will be described below. The control circuit 26
As described above, the sensor 39 measures the intake air pressure of the engine 2. Further, the back pressure in the pipe 5 from the engine 2 to the DPF 6 is measured by the back pressure sensor 41. When the engine 2 is stopped, the intake air pressure and the back pressure both have the pressure value PA indicating the atmospheric pressure. When the engine 2 is operated, the back pressure becomes a positive value,
The pressure value becomes P1. The control circuit 26 determines the pressure value PB which is the difference between the pressure value P1 and the pressure value PA after the engine 2 has been operated.

PB = (P1-PA) (1) When the pressure value PB is equal to or higher than a predetermined pressure value, the DPF
It is considered that a large amount of solid fine particles were collected in 6 and the flow of exhaust gas was obstructed. At this time, the control circuit 26 determines that it is necessary to burn and remove the collected solid fine particles and regenerate the DPF 6. The control circuit 26 controls the control circuit 26 based on the pressure PB and the intake air pressure, for example.
The amount of solid fine particles trapped in the DPF 6 is estimated by referring to a map stored in advance in the ROM 52 provided in the. In addition, the DP based on the estimated collection amount obtained
As the F regeneration condition, for example, the heating time by the heater 18 is determined.

When the engine 2 is stopped, the control circuit 26 controls conduction / interruption by the heater relay circuit 22 to heat the heater 18, and a predetermined amount of heat is applied to the DPF 6 to burn and remove solid fine particles. , DPF6
To play. The regenerated DPF 6 is used again for collecting solid fine particles. At this time, the estimated collection amount of solid fine particles and the collection time which is the time after the previous regeneration is
The cumulative collection amount and the cumulative collection time stored in the EEPROM 53 of the control circuit 26 are added and stored. The number of times the DPF 6 is reproduced is counted by the counter of the EEPROM 53 and stored. The above-mentioned numerical values written in the EEPROM 53 are stored in the RAM in the control circuit 26.
It may be written at 51. At that time, the RAM 51 must be configured such that electric power is always supplied without going through the main relay circuit 27. When the back pressure sensor 41 has not failed, the heater 18 which is the regeneration device of the DPF 6 is controlled as described above.

The input terminals 54a, 54b of the control circuit 26,
By selecting the voltage level applied to 54c, as shown in FIG. 2 (1), eight types of vehicle types A, B, C,
D, E, F, G, J can be estimated. FIG.
In the table shown in (1), "-" indicates that the terminal 54 is in the open state, and "H" indicates that a high level signal is applied. In this specification, the vehicle type is determined depending on whether a high-level signal that is the voltage VB is applied to the terminal 54 or an open state is used. However, instead of the high-level signal, the terminal 54 is grounded,
The terminals 54 may be connected to each other to determine the vehicle type.

As shown in FIG. 3A, terminals 54a, 5
If both 4b and 54c are open,
The conversion circuit 55 uses the CPU 50 as information for determining the vehicle type.
, An 8-bit identification code in which the least significant 0th bit is “1” and the other 7 bits are “0” is given. CPU5
0 writes and stores the identification code from the conversion circuit 55 in the RAM 51. The vehicle type determination process is performed by comparing the identification code written in the RAM 51 with the identification code stored in the EEPROM 53 in advance.
Details of the determination process will be described later.

Further, referring to FIG. 2A, when the control circuit 26 is mounted on the vehicle type B, the voltage VB is applied to the terminal 54a and the terminals 54b, 54B, as shown in FIG. 3B. 5
Set 4c to the open state. At this time, in the identification code shown in FIG. 2B, the first bit is "1" and the other 7 bits are "0". When the control circuit 26 is installed in the vehicle type C, the voltage V is applied to the terminal 54b as shown in FIG.
B is applied to set the terminals 54a and 54c to the open state. At this time, the identification code is "1" for the second bit and the other 7
The bit becomes "0". As described above, whether the voltage VB is applied to the terminals 54a, 54b, 54c or the terminal 54a, 54b, 54c is set to the open state is determined for each vehicle type in which the control circuit 26 is mounted.

In the identification code shown in FIG. 2 (2), only one of the eight bits is "1" based on the state of the voltage applied to the three terminals 54a, 54b, 54c as described above. Indicates the type of vehicle.
Regarding the priority order determined for each vehicle type in which the control circuit 26 is supposed to be mounted, the vehicle type J whose 7th bit of the most significant bit is "1" has the lowest priority and the 0th bit of the least significant bit is The priority of the vehicle type A that is "1" is determined to be the highest. The method of determining the priority order for each vehicle type will be described later.

FIG. 4 is a diagram for explaining a method of discriminating a vehicle type in the control circuit 26. As described above, the terminal 54
The identification code Z10, which is determined based on the states of the voltages applied to a, 54b, and 54c, is stored in the RAM 51, for example, at the address "1000". Also, CPU
Reference numeral 50 designates the address "200" of the EEPROM 53, for example.
The identification code Z20 stored in the address "0" is read out and stored in the RAM 51, for example, at the address "3000". The CPU 50 compares the identification codes Z10 and Z20, and determines which vehicle model map is used among the maps stored in the ROM 52 in advance based on the comparison result.

FIG. 5 is a table showing an example of the correspondence relationship between the back pressure for each vehicle type stored in the ROM 52, the estimated collection amount of solid fine particles, and the specified amount, and FIG. 6 is the back pressure for each vehicle and the solid state. It is a graph which shows the relationship with the estimated collection amount of fine particles.

In the ROM 52, for example, the address "00"
In a region from “00” to “1000”, a map in which the back pressure, the estimated collection amount, and the specified amount for vehicle type A are stored is stored. The specified amount is determined for each vehicle type,
This is a reference amount of whether or not to promote the reproduction operation of the DPF 6. As will be described later, when the estimated trapped amount is equal to or more than the specified amount, the user is warned and the DPF 6 is regenerated. The specified amount is determined so that the DPF 6 will not be melted even if heat is applied to the DPF 6 for a time required to remove that amount of solid fine particles.

The above-mentioned identification code Z10 and identification code Z2
When the control circuit 26 determines which vehicle type should be controlled by comparing with 0, the start position for reading the estimated trapped amount from the ROM 52 is determined. If it is determined that the vehicle type is A, the read start position is set to the address "0000", and if it is determined that the vehicle type B is the read start position is the address "1000".
It is set at the address. Hereafter, the estimated collection amount up to vehicle type J is stored in sequence.

For example, when it is determined that the vehicle type is A and the measured back pressure is 100 mmHg,
It is estimated that the amount of the solid fine particles collected by the DPF 6 is 12 g. Similarly, it is estimated to be 14 g at 200 mmHg. Similarly for other vehicle types, for example, 100 mm
The estimated collection amount of solid fine particles is stored for each Hg.

As shown in FIG. 6, the relationship between the back pressure and the estimated collection amount of solid fine particles is determined for each model. If the estimated collection amount q1 of the vehicle type A, the estimated collection amount q2 of the vehicle type B, and the estimated collection amount q3 of the vehicle type C in the pressure amount value PC are q1>q2> q3, the priority of the vehicle type is high. The vehicle type A, the vehicle type B, and the vehicle type C are arranged in order from the one. Therefore, the priority order set for each vehicle type is set such that the vehicle type having the largest estimated amount of collected solid fine particles when the back pressure has the same pressure value has the highest priority.

Based on the back pressure value measured by the back pressure sensor 41, the estimated collection amount of solid fine particles is read from the ROM 52, and the time for burning the solid fine particles is determined based on the estimated collection amount. Since the solid particulates are actually burned when the vehicle is stopped, as shown in the processing of the flowchart shown in FIG. 10 described later, the amount of the solid particulates collected in the DPF 6 is estimated and its maximum value is set to For example, it is stored in the RAM 51 or the like, and the time during which the heater 18 is energized for regeneration of the DPF 6 is determined based on the maximum value when the vehicle is stopped.

FIG. 7 is a graph showing the relationship between the maximum value MAX of the collected amount of solid fine particles in the DPF 6 and the heating time of the heater 18. In the control circuit 26, for example, a correspondence relationship such as the graph shown in FIG. 7 may be set in advance and set for each vehicle type. In step m6 of the flow chart shown in FIG. 9, which will be described later, when the estimated collection amount of solid fine particles is rewritten, the heating time of the heater 18 is also changed. For example, if the heating time of the heater 18 is set to 60 minutes when the maximum value MAX stored in the RAM 51 or the like is the estimated collection amount QA, the estimated collection amount QB with QB> QA has the maximum value. When MAX is rewritten, the heating time is changed to 80 minutes. In the control circuit 26, the heating time is extended as the maximum value MAX of the estimated collection amount of solid particles is updated. Such extension of the heater heating time is performed until the estimated collection amount of the solid fine particles exceeds a predetermined regulated amount.

FIG. 8 is a timing chart for explaining the reproducing operation controlled by the control circuit 26. DPF6
Is performed when the vehicle is stopped, and the user recognizes that the reproduction operation needs to be performed based on, for example, the estimated collection amount of the solid fine particles displayed on the display device 34, and, for example, the pressing operation is performed. It is started by operating the input device 63 such as a button.

At the time t1, the input device 63 is operated to give the signal to the control circuit 26 shown in FIG.
When the signal U1 shown in (1) becomes high level, for example, the heater relay circuit 22 becomes conductive, and electric power is supplied to the heater 18 as shown in FIG. 8 (2).

At time t2 when the period W2 has elapsed from time t1, the operation of the air pump 14 is started as shown in FIG. 8 (3), and at the same time, the valve 15 is operated as shown in FIG. 8 (4).
Is opened. The air pump 14 is operated and the valve 15 is opened, so that air is sent to the conduit 16.
Assuming that the heater 18 is sufficiently heated in the period W2, the introduction of air causes the combustion of solid fine particles and the like in the DPF 6 to start.

The heater 18 is energized during the period W1 from time t1 to time t3 to supply heat to the DPF 6.
After the heater relay circuit 22 is cut off at time t3 and the supply of electric power to the heater 18 is finished, air is further sent to the conduit 16 during the period W4 until time t4 and combustion is continued. Therefore, assuming that the heater 18 is sufficiently heated at the time t2, the combustion is performed during the period W3 from the time t2 to the time t4.

A period W3, which is a combustion time required to remove the solid fine particles from the DPF 6, is obtained from the estimated amount of the collected solid fine particles described above, and is a time period for heating the heater 18 for burning during the period W3. A certain period W1 is defined.

FIG. 9 is a flowchart of the vehicle type discriminating process in the control circuit 26. The vehicle type determination process is performed as part of the reproduction process shown in FIG. 10 described later. EEPR
The identification code stored in the OM 53 is the first identification code, and the identification code determined based on the identification signal input to the conversion circuit 55 via the input terminal 54 is the second identification code.

At step k1, the first identification code is read from the EEPROM 53 and written in the RAM 51. At step k2, the second identification code is written in the RAM 51. In step k3, the first and second identification codes written in the RAM 51 are read to determine whether they match.
If the two identification codes do not match, the process proceeds to step k4. At step k4, for example, a warning indicating that an abnormality has occurred on the display device 34 is issued. At step k5, for example, a predetermined identification code is read from the ROM 52 and set as the identification code for obtaining the estimated amount of solid particulates to be collected. After the identification code is decided, the processing is ended. When the two identification codes match at step k3, the identification code is set as the identification code for obtaining the estimated amount of the solid particulates at step k5, and the process ends.

FIG. 10 is a flow chart for explaining the regeneration processing of the DPF 6 by the control circuit 26. In step m1, the vehicle type discrimination process as shown in FIG. 9 is performed, and the vehicle type in which the control circuit 26 is mounted is determined. In step m2, the back pressure is obtained based on the output of the back pressure sensor 41 described above. At the subsequent step m3, the head address of the ROM 52 for reading the amount of solid particulates collected is determined based on the vehicle type determined at step m1.

At step m4, the trapping amount of solid fine particles is estimated based on the back pressure obtained at step m2 with reference to the map specified by setting the start address of the ROM 52.

In step m5, the collection amount of the solid fine particles estimated in step m4 is compared with the maximum value of the estimated collection amount of the solid fine particles stored in the EEPROM 53. When the estimated collection amount is larger than the maximum value, the process proceeds to step m6. At step m6, the estimated collection amount is stored in the RAM 51 or the like as the maximum value of the collection amount.

In step m7, the estimated collection amount is displayed on the display device 34. In the following step m8, EEP
It is determined whether or not the maximum amount of the solid particulates stored in the ROM 53 is equal to or more than the specified amount. If the maximum value is greater than or equal to the specified amount, step m9
Proceed to. In step m9, as an abnormality warning, for example, a display indicating that the estimated trapped amount is equal to or more than the specified amount is displayed on the display device 34, and the user is prompted to perform the reproducing operation.

In step m10, it is determined whether the input device 63 is operated while the vehicle is stopped. When the input device 63 is operated to instruct the reproduction of the DPF 6 by the user, the process proceeds to step m11 to reproduce the DPF 6. In step m11, the energization time of the heater 18 is obtained from the estimated amount of collected solid particles. After obtaining the energization time of the heater 18, the DPF 6 is regenerated by supplying electric power to the heater 18. In step m10, if the input device 63 is not operated, the processing from step m2 is performed.

As described above, according to the first embodiment of the present invention, when the identification code read from the EEPROM 53 and the identification code based on the identification signal are different from each other, the control circuit 26 takes two types. As the abnormality in which the identification codes do not match is occurring, for example, a display indicating that the abnormality is occurring is displayed on the display device 34 or the like, so that the user can detect the abnormality early. Further, when an abnormality occurs, a predetermined identification code is read from the ROM 52 to obtain the estimated amount of solid particulates to be collected, so that the identification code that may have caused an abnormality does not determine the vehicle type, and the DPF 6 captures it. The collected solid fine particles are not removed, and the solid fine particle collection efficiency of the DPF 6 decreases, and
It is possible to prevent 6 from supplying an excessive amount of heat.

Since the control circuit 76 according to the second embodiment of the present invention has the same configuration as the control circuit 26 shown in FIG. 1, the same reference numerals are used for the description. Control circuit 76
Controls the regeneration process of the DPF 6 similarly to the control circuit 26. The characteristic of the control circuit 76 is that the EEP is used when the vehicle type is determined.
If the identification code read from the ROM 53 and the identification code based on the identification signal are different, the vehicle type having a higher priority is set as the vehicle type for estimating the amount of solid particulates collected.

FIG. 11 is a flow chart of the vehicle type discrimination process performed by the control circuit 76. In this flowchart, the same processes as those in the flowchart of the vehicle type discrimination process of the control circuit 26 shown in FIG.

The process until the abnormality warning is issued in step k4 is the same as that in the flowchart shown in FIG. After the abnormality warning is given in step k4, the process proceeds to step k11. Step k11 determines which of the two identification codes has the highest priority of the vehicle type defined by the identification code. In the following step k12, step k1
The identification code of the vehicle type determined in 1 is defined as the identification code of the vehicle type for estimating the amount of solid particulates collected. After the processing of step k12 ends, the processing is shifted to the flowchart shown in FIG. 10, for example. If it is determined in step k3 that the two identification codes match, the process proceeds to step k12. At that time, in step k12, the coincident identification code is determined as the identification code of the vehicle type for estimating the amount of the collected solid fine particles.

As described above, according to the second embodiment of the present invention, when the identification code read from the EEPROM 53 and the identification code based on the identification signal are different, the control circuit 76 gives priority to each other. Since the identification code indicating the vehicle type whose value is set to a high value is set as the identification code for estimating the amount of collected solid fine particles, the identification code stored in the EEPROM 53 is rewritten or given to the input terminal 54. When the identification signal becomes a different identification signal due to the disconnection of the signal line or the like and the identification code is erroneously determined, when the vehicle type indicated by the two identification codes has the highest priority, that is, when the back pressure value is the same. We will select a vehicle type with a large estimated collection amount of solid particles,
Even when the identification codes do not match, the regeneration time can be set so as to reduce the solid fine particles trapped in the DPF 6. Therefore, it is possible to prevent the collection efficiency of the DPF 6 from decreasing when the vehicle next starts traveling.
Further, the control circuit 76 may set the priority order such that the time until the same estimated collection amount is short, that is, the vehicle type in which the DPF 6 collects the solid particulates is fast, has a high priority. .

The control circuit 86 according to the third embodiment of the present invention has the same configuration as the control circuit 26 shown in FIG. 1 similarly to the control circuit 76 described above, and therefore the description will be given using the same reference numerals. I do. The characteristic of the control circuit 86 is that when the identification code read from the EEPROM 53 at the time of performing the vehicle type identification and the identification code based on the identification signal are different, R
That is, among the vehicle types stored in the OM 52, the vehicle type with the highest priority is set as the vehicle type for estimating the trapped amount of solid particulates.

FIG. 12 is a flow chart of a vehicle type discrimination process performed by the control circuit 86. In this flowchart, the same processes as those in the flowchart of the vehicle type discrimination process of the control circuit 26 shown in FIG.

The process until the abnormality warning is issued in step k4 is the same as that in the flowchart shown in FIG. After the abnormality warning is given in step k4, the process proceeds to step k21. In step k21, the identification code indicating the vehicle type having the highest priority among the vehicle types stored in the ROM 52 is determined as the identification code for estimating the amount of solid particulates trapped. After the processing of step k21 is completed, the processing is shifted to, for example, the flowchart shown in FIG. If it is determined in step k3 that the two identification codes match, the process proceeds to step k21. At that time, in step k21, the coincident identification code is set as the identification code of the vehicle type for estimating the amount of the collected solid particles.

As described above, according to the third embodiment of the present invention, the control circuit 86 stores in the ROM 52 when the identification code read from the EEPROM 53 and the identification code based on the identification signal are different. Since the identification code indicating the vehicle type having the highest priority among the identification codes indicating the stored vehicle type is set as the identification code for estimating the trapped amount of solid particulates, the identification code stored in the EEPROM 53 is written. When the identification code is changed, or when the identification signal given to the input terminal 54 becomes a different identification signal due to a disconnection of the signal line or the like and the identification code is erroneously determined, the identification indicating the vehicle type stored in the ROM 52 is performed. Among the codes, the highest priority, that is, the estimated collection amount of solid particulates when the back pressure value is the same is determined to be the largest. That will be selected vehicle type, it is possible to determine the playback time so as to ensure removal of solid particulates identification code is collected in a an even DPF6 not match. Therefore, it is possible to prevent the collection efficiency of the DPF 6 from decreasing when the vehicle next starts traveling.

Since the control circuit 96 according to the fourth embodiment of the present invention has the same structure as the control circuit 26 shown in FIG. 1, the description will be given using the same reference numerals. Control circuit 96
Controls the regeneration process of the DPF 6 similarly to the control circuit 26. A feature of the control circuit 96 is that the EEP is used when the vehicle type is determined.
When the identification code Z1 read from the ROM 53 and the identification code Z2 based on the identification signal are different, it is determined which identification code has a higher priority of the vehicle type, and the priority of the identification code Z2 is determined. If the value is high, the identification code Z2 is written in the EEPROM 53, and the vehicle type defined by the identification code Z2 is used as the vehicle type for estimating the amount of solid particulates collected. The written identification code is read from the EEPROM 53 at the next vehicle type discrimination process.

FIG. 13 is a flow chart of a vehicle type discrimination process performed by the control circuit 96. This flowchart is
For example, it is performed as step n1 in the flowchart shown in FIG. In step n1, the EEPROM 5
The identification code for vehicle type identification is read from 3 and the identification code Z
Write 1 to RAM 51. At step n2, the identification code Z2 determined based on the identification signal given to the input terminal 54 is written in the RAM 51.

At step n3, two identification codes Z
It is determined whether 1 and Z2 are equal. When it is determined that the two identification codes Z1 and Z2 are not the same, the process proceeds to step n4. In step n4, it is determined whether the identification code Z1 has a higher priority than the identification code Z2. If the identification code Z2 has a higher priority than the identification code Z1, the process proceeds to step n5. At step n5, the identification code Z2 determined based on the identification signal given to the input terminal 54 is written in the EEPROM 53 to form the identification code Z1. In step n6, for example, a display indicating that an abnormality has occurred in which the two identification codes do not match is displayed on the display device 34. In step n7,
The identification code Z1 written in the EEPROM 53 is used as an identification code for determining the vehicle type for estimating the amount of solid particles. After the processing of step n7 is completed, for example, as shown in FIG.
The processing is shifted to the flowchart of 0.

If it is determined in step n3 that the two identification codes are the same, in step n7 the identification code is set to the identification code for estimating the amount of solid particulates trapped. In step n4, the identification code Z
When it is determined that the priority order of 1 is higher than the identification code Z2, the processing from step n6 is performed. At this time, in step n7, the identification code Z1 is used as an identification code for determining the vehicle type for estimating the amount of solid particulates collected.

As described above, according to the fourth embodiment of the present invention, the control circuit 96 determines which of the identification code read from the EEPROM 53 and the identification code based on the identification signal is different. It is determined whether the priority of the vehicle type determined by the identification code is high, and the identification code Z2
If the priority of is high, the identification code Z2 is set to EEPRO
Since the vehicle type that is written in M53 and is determined by the identification code Z2 is used to estimate the amount of solid particulates collected, the identification code stored in the EEPROM 53 has been overwritten, or the input code is given to the input terminal 54. When the identification signal to be generated becomes a different identification signal due to the disconnection of the signal line or the like and the identification code is erroneously determined, the identification code indicating the vehicle type stored in the ROM 52 has the highest priority, that is, the same back pressure. When the value is a value, the identification code indicating the vehicle type for which the estimated collection amount of the solid fine particles is large is stored in the EEPROM 53, and even if the identification codes do not match, the EEPR
The vehicle type is determined based on the identification code stored in the OM 53, and the regeneration time can be determined so as to reliably remove the solid fine particles trapped in the DPF 6, and the DPF 6 when the vehicle next starts traveling. It is possible to prevent a decrease in collection efficiency.

In the present specification, the diesel particulate filter means means the DPF 6 and the heater 1.
8 is included in the configuration. Further, in the present specification, the vehicle type corresponds to the type of diesel particulate filter means mounted on the vehicle body of the automobile.

[0068]

As described above, according to the present invention, the type of the controlled device determined based on the signal applied to the connection terminal and the type of the controlled device stored in the second memory are different. , The controlled device is operated by the information for the predetermined control, so that the controlled device can be controlled based on a signal indicating that there is a possibility that an abnormality has occurred. It is possible to prevent the controlled device from operating based on the information for improper control without determining the information of (1) to operate the controlled device.

According to the invention, the type of the controlled device determined based on the signal given to the connection terminal and the second
When the type of the controlled device stored in the memory is different from that of the controlled device, the controlled device is operated according to the control information having the higher priority among the two types of the controlled devices. It shows different types of controlled devices, does not operate the controlled device by setting the information for control based on the signal that may have an abnormality, etc. Can be prevented from being operated based on the information.

Further, according to the present invention, when the type of the controlled device determined based on the signal given to the connection terminal and the type of the controlled device stored in the second memory are different, Among the control information stored in the first memory, the controlled device is operated by the control information with the highest priority, so that the controlled device types different from each other are indicated and an abnormality occurs. There is no need to determine the information for control based on the signals that may exist and to operate the controlled device, and prevent the controlled device from operating based on the information for inappropriate control. You can

Further, according to the present invention, the display means included in the processing device has the type of the controlled device determined based on the signal given to the connection terminal corresponding to the type of the controlled device and the second memory. When it is determined that the type of the controlled device that is stored is not the same, a display indicating that the two do not match is displayed, so that the user of the processing device sees the display of the display unit and determines the type of the controlled device. It is possible to determine whether an abnormality has occurred when determining
It is possible to indicate to the user that an abnormality has occurred and prompt a process for removing the abnormality.

Further, according to the present invention, the diesel particulate filter means is determined by the type of diesel particulate filter means determined based on the signal applied to the connection terminal and the type of diesel particulate filter means stored in the second memory. The time to supply power to the electric heater of the curate filter means can be determined,
The processing device can perform control corresponding to the type of diesel particulate filter means to be controlled. Since the back pressure and the trapped amount stored in the first memory are determined according to the type of diesel particulate filter means, the time for heating the filter is short and solid particulates are completely removed. It is possible to prevent the filter from remaining unburned and being reduced in efficiency of collecting solid fine particles by the filter, and from being melted by giving too much heat for a long heating time.

Furthermore, according to the present invention, the type of diesel particulate filter means determined based on the signal applied to the connection terminal and the type of diesel particulate filter means stored in the second memory are different types. Even by showing, by controlling the diesel particulate filter means as a high priority type diesel particulate filter means,
It is possible to prevent deterioration of the collection efficiency of the filter in advance because the solid fine particles remain unburned due to insufficient time for heating the filter.

According to the present invention, according to the type of diesel particulate filter means defined based on the voltage applied to the connection terminal and the type of diesel particulate filter means stored in the programmable read-only memory, The time for supplying electric power to the electric heater of the diesel particulate filter means can be determined based on the pressure, and the control means can perform control corresponding to the type of diesel particulate filter means to be controlled. Since the back pressure and the trapped amount stored in the read-only memory are determined according to the type of diesel particulate filter means, the time for heating the filter is short and solid particles are completely removed. It is possible to prevent the filter from remaining unburned, and the solid particulate collection efficiency of the filter to be lowered, or the filter from being melted by giving too much.

[Brief description of drawings]

FIG. 1 is a control circuit 26 according to a first embodiment of the present invention.
3 is a diagram showing an exhaust path of the engine 2. FIG.

FIG. 2 is a diagram illustrating an example of setting a vehicle type in a control circuit 26.

FIG. 3 is a diagram for explaining an example of a method of setting a vehicle type in a control circuit 26.

FIG. 4 is a diagram for explaining a method of determining a vehicle type performed by a control circuit 26.

FIG. 5 is a diagram showing a correspondence between a back pressure stored in a ROM 52, an estimated collection amount of solid fine particles, and a specified amount.

FIG. 6 is a graph showing the relationship between back pressure and estimated solid particulate collection amount for each vehicle type.

FIG. 7 is a graph showing the relationship between the maximum value of the estimated collection amount of solid fine particles and the heater regeneration time.

FIG. 8 is a timing chart for explaining a reproduction operation of the DPF 6.

9 is a flowchart of a vehicle type determination process in the control circuit 26. FIG.

FIG. 10 is a flowchart of processing of a main program in the control circuit 26.

FIG. 11 is a control circuit 7 according to a second embodiment of the present invention.
6 is a flowchart of a vehicle type determination process in FIG.

FIG. 12 is a control circuit 8 according to a third embodiment of the present invention.
6 is a flowchart of a vehicle type determination process in FIG.

FIG. 13 is a control circuit 9 according to a fourth embodiment of the present invention.
6 is a flowchart of a vehicle type determination process in FIG.

[Explanation of Codes] 2 Engine 3 Exhaust Path 5 Pipeline 6 DPF 7,18 Heater 22 Heater Relay Circuit 26, 76, 86, 96 Control Circuit 28 Battery 34 Display Device 41 Back Pressure Sensor 50 CPU 51 RAM 52 ROM 53 EEPROM 54a , 54b, 54c Input terminal 55 Conversion circuit 61, 62 Voltage circuit 63 Input device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirotaka Kanazawa 2-1, 1-1 Toyota-cho, Takahama-shi, Aichi Stock company Toyota Industries Corporation

Claims (7)

[Claims] 1. A processing device, which is commonly used by a plurality of types of controlled devices and operates a controlled device by using control information determined for each type, wherein the processing device is defined for each of the plurality of types. First to store information
A memory, a rewritable second memory for storing the type of controlled device to be controlled by the processing device, one or a plurality of connection terminals, and a signal given to the connection terminal corresponding to the type of the controlled device If it is determined that the type of the controlled device determined by the above is the same as the type of the controlled device stored in the second memory, the controlled device determined to be the same stored in the first memory A control means for operating the controlled device with the control information corresponding to the type of the device, and for operating the controlled device with predetermined control information when it is determined that they are not the same. And processing equipment. 2. The information stored in the first memory for each control has a predetermined priority order, and the control means gives the connection terminal to the connection terminal corresponding to the type of the controlled device. When it is determined that the type of the controlled device determined based on the received signal is not the same as the type of the controlled device stored in the second memory, it is given to the connection terminal according to the type of the controlled device. Of the information for control corresponding to the type of the controlled device determined based on the received signal and the information for control corresponding to the type of the controlled device stored in the second memory, The processing device according to claim 1, wherein the controlled device is operated by using information that is highly defined. 3. The type of the controlled device, which is determined based on a signal given to a connection terminal corresponding to the type of the controlled device, and the type of the controlled device stored in the second memory. When is determined not to be the same,
3. The processing device according to claim 2, wherein the controlled device is operated by the information for the control having the highest priority among the information for the respective controls stored in the first memory. 4. The type of the controlled device determined based on the signal applied to the connection terminal corresponding to the type of the controlled device and the type of the controlled device stored in the second memory are not the same. The processing device according to claim 1, further comprising a display unit that displays a display indicating that the two do not match when the determination is made. 5. The controlled device is provided in a discharge path of exhaust gas of a diesel engine, collects solid fine particles in exhaust gas discharged from the diesel engine, and a solid by heating the filter. A diesel particulate filter means including an electric heater for burning and removing fine particles, wherein a back pressure detecting means for detecting a back pressure which is a pressure on an upstream side in an exhaust gas inflow direction with respect to the filter is provided, and In one memory, the back pressure and the amount of solid fine particles collected by the filter are stored in association with each other as information for the control. Based on the detected back pressure, the collection amount of the solid fine particles collected by the filter is read out from the first memory, and is calculated based on the read collection amount. The heating time required to burn the solid fine particles collected by the operation is calculated and obtained, and electric power is supplied to the electric heater for the heating time. Processing equipment. 6. The priority is set such that when the back pressure is the same, the priority of the type of diesel particulate filter means having a large amount of solid particulates collected by the filter is high. The processing device according to claim 5, which is provided. 7. A filter provided in an exhaust path of exhaust gas discharged from a diesel engine, for collecting solid fine particles in exhaust gas, and heating the filter to remove solid fine particles collected by the filter. Diesel particulate filter means including an electric heater for burning; back pressure detection means for detecting a back pressure which is a pressure in a space upstream of the filter in the exhaust gas inflow direction in the discharge path; and a connection terminal A voltage supply means for applying a voltage corresponding to the type of diesel particulate filter means to the connection terminal, and for each type of diesel particulate filter means,
The back pressure detected by the back pressure detecting means and the read-only memory in which the amount of solid particulates collected by the filter are stored in association with each other, and the type of diesel particulate filter means to be controlled is An electrically programmable erasable programmable read-only memory stored in advance, a type of diesel particulate filter means determined based on a voltage applied to the connection terminal, and a diesel stored in the programmable read-only memory When it is determined that the type of the particulate filter means is the same, the trapping amount of the diesel particulate filter means that is stored in the read-only memory and is determined to be the same is determined in accordance with the back pressure. Read from read-only memory to find, When it is determined that the number is not one, a predetermined collection amount corresponding to the back pressure is obtained, and the heating time required to burn the collected solid fine particles is calculated based on the obtained collection amount. And a control means for supplying electric power to the electric heater only for the heating time, the regeneration device of the diesel particulate filter.