JP2009223730A - Abnormality monitoring device for arithmetic processing unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an abnormality monitoring device, capable of accurately performing abnormality determination for a specific arithmetic part of an arithmetic processing unit in a pinpoint manner without adding an external circuit. <P>SOLUTION: A specific arithmetic part 38a in a controller 38 arithmetically determines a solenoid drive duty Dc2 for achieving a target clutch capacity tTc2, and supplies it to a solenoid in a clutch pressure control unit 39 to perform fastening capacity control of a clutch. An arithmetic part 38b set within the controller 38 for abnormality monitoring of the arithmetic part 38a map-searches a solenoid drive duty Dc2' for achieving tTc2. An arithmetic result comparison part 38c in the controller 38 outputs an arithmetic result matching signal E, which shows normality with Dc2 matched to Dc2' when deviation ΔDc2=¾Dc2-Dc2'¾ is less than a minute set value, to a controller 11, and does not output the signal E to the controller 11 in other cases which are abnormal with Dc2 differed from Dc2'. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an apparatus for monitoring an abnormality of an arithmetic processing unit in a control system such as a hybrid vehicle that can be driven by power from an engine and a motor / generator.

  The control system controls the corresponding control target based on the control signal obtained by the arithmetic processing unit. At this time, it is necessary to monitor and transmit the abnormality of the arithmetic processing unit or to perform appropriate abnormality countermeasure processing.

As an abnormality monitoring device for an arithmetic processing unit for that purpose, as described in Patent Document 1, for example, an abnormality monitoring circuit is additionally provided outside the arithmetic processing unit to be monitored for abnormality, and is used as an abnormality monitoring target. In general, the arithmetic processing unit is monitored by this circuit so that an abnormality of the arithmetic processing unit is detected at an early stage, and the abnormality is transmitted or an abnormality countermeasure is taken.
JP 2003-150408 A

  However, if an additional abnormality monitoring circuit is added outside the arithmetic processing unit, there is a problem that the cost is increased.

In order to monitor the abnormality of the arithmetic unit without adding an abnormality monitoring circuit outside the arithmetic processing unit, on the premise of a control system having a plurality of arithmetic processing units,
It is conceivable to provide a function for monitoring the abnormality of the arithmetic processing unit whose abnormality should be monitored in another arithmetic processing unit different from the arithmetic processing unit whose abnormality should be monitored.

  The abnormality monitoring function unit set in the other arithmetic processing unit sends data for abnormality determination to the arithmetic processing unit subject to abnormality monitoring, and what kind of answer the arithmetic processing unit subject to abnormality monitoring responds to this Accordingly, it can be considered to determine whether or not the arithmetic processing unit is abnormal.

However, as described above, the abnormality monitoring function unit set in the arithmetic processing unit different from the abnormality monitoring target arithmetic processing unit determines whether the abnormality monitoring target arithmetic processing unit is abnormal.
It only monitors whether the arithmetic processing unit subject to abnormality monitoring is operating normally as a whole, and even if the arithmetic processing unit subject to abnormality monitoring operates normally as a whole, When an abnormality has occurred in the calculation unit, there is a case where the abnormality of the specific calculation unit cannot be recognized.

Therefore, since the specific arithmetic unit in the arithmetic processing unit subject to abnormality monitoring calculates the control amount of the particularly important control part, even if it is necessary to monitor the abnormality of the important arithmetic unit particularly carefully, It is not possible to monitor the abnormality of the important arithmetic unit intensively.
For this reason, even if the operation processing unit subject to abnormality monitoring is operating normally as a whole, if an abnormality has occurred in an important operation unit in the operation processing unit, the abnormality of the important operation unit can be recognized. Therefore, there is a problem that the durability is lost due to a delay in predetermined countermeasures by overlooking such an abnormality.

  In view of the above situation, the present invention does not add an abnormality monitoring circuit to the outside of the arithmetic processing unit that is the target of abnormality monitoring, and thus does not incur a high cost. An object of the present invention is to provide an abnormality monitoring device for an arithmetic processing unit that can reliably detect an abnormality in a specific arithmetic unit and solve the above-mentioned problems caused by an abnormal detection delay or an inability to detect an abnormality of an important arithmetic unit. To do.

For this purpose, the abnormality monitoring device of the arithmetic processing unit according to the present invention is as described in claim 1,
A plurality of arithmetic processing units are provided, one corresponding control object is controlled by a control signal obtained by a specific arithmetic unit in one arithmetic processing unit, and another corresponding one is obtained by a control signal obtained by another arithmetic processing unit. Assuming a control system that controls the control object of
In the one arithmetic processing unit,
Although the arithmetic processing process is different from that of the specific arithmetic unit in the one arithmetic processing unit, a monitoring arithmetic unit is set so that the arithmetic results are almost the same, and the deviation between the arithmetic results of both arithmetic units is a set value. Set the operation result comparison unit that outputs the operation result match signal when it is less than
When the operation result coincidence signal is not output from the operation result comparison unit, the other operation processing unit is configured to recognize an abnormality of the specific operation unit.

In the abnormality monitoring device for the arithmetic processing unit according to the present invention described above,
The monitoring arithmetic unit set in the one arithmetic processing unit that is an abnormality monitoring target outputs almost the same arithmetic result although the arithmetic processing process is different from that of the specific arithmetic unit in the one arithmetic processing unit. ,
Similarly, the calculation result comparison unit set in the one calculation processing unit outputs a calculation result coincidence signal when the deviation between the calculation results of the monitoring calculation unit and the specific calculation unit is less than a set value.

  The other arithmetic processing units that are not subject to abnormality monitoring, when the operation result coincidence signal is not output according to the presence or absence of the operation result coincidence signal from the operation result comparison unit, that is, the operation results of the monitoring operation unit and the specific operation unit are When there is a large divergence, the abnormality of the specific calculation unit is recognized.

Therefore, the monitoring calculation unit and the calculation result comparison unit are set in the one arithmetic processing unit that is the object of abnormality monitoring, and the monitoring calculation unit and the calculation result comparison unit, and the other calculation existing in the control system. With the processing unit, the one arithmetic processing unit can be monitored for abnormality.
It is possible to monitor the abnormality of the one arithmetic processing unit without adding any other abnormality monitoring circuit outside the existing arithmetic processing unit, and hence without increasing the cost.

Moreover, by comparing the calculation result of the specific calculation unit in the one calculation processing unit with the calculation result of the monitoring calculation unit set in the one calculation processing unit, the magnitude of the deviation between the two is In order to certify an abnormality in a specific computing unit,
Instead of monitoring the entire one arithmetic processing unit that is an abnormality monitoring target, it is possible to reliably monitor the abnormality of the specific arithmetic unit in the arithmetic processing unit,
By selecting an important calculation unit as this specific calculation unit, it is possible to reliably monitor abnormalities in the important calculation unit. It is possible to solve the problem that the performance is impaired.

Hereinafter, embodiments of the present invention will be described in detail based on examples shown in the drawings.
FIG. 1 shows a power train of a front engine / rear wheel drive hybrid vehicle including a hybrid drive device incorporating an abnormality monitoring device according to an embodiment of the present invention, along with its control system,
1 is an engine, 2FL and 2FR are front left and right wheels, and 3RL and 3RR are left and right rear wheels (right and left drive wheels).

  In the power train of the hybrid vehicle shown in FIG. 1, the automatic transmission 4 is arranged in tandem at the rear of the engine 1 in the longitudinal direction of the vehicle in the same manner as a normal rear wheel drive vehicle. A motor / generator 6 is connected to the shaft 5 for transmitting the rotation to the input shaft 4a of the automatic transmission 4.

The motor / generator 6 includes an annular stator 6a fixed in the housing and a rotor 6b disposed concentrically with a predetermined air gap in the stator 6a. Acts as an electric motor) or as a generator (generator), and is disposed between the engine 1 and the automatic transmission 4.
The motor / generator 6 is connected to the center of the rotor 6b through the shaft 5, and this shaft 5 is used as a motor / generator shaft.

The first clutch 7 is inserted between the motor / generator 6 and the engine 1, more specifically, between the motor / generator shaft 5 and the engine crankshaft 1a, and the engine 1 and the motor / generator 6 are connected by the first clutch 7. Combine in a detachable manner.
Here, it is assumed that the first clutch 7 is capable of continuously changing the transmission torque (clutch engagement) capacity. For example, the first clutch 7 continuously controls the clutch hydraulic oil flow rate and the clutch operation hydraulic pressure with a proportional solenoid to transmit the transmission torque (clutch engagement). ) Consists of wet multi-plate clutch with variable capacity.

The motor / generator 6 and the automatic transmission 4 are directly coupled to each other by direct coupling of the motor / generator shaft 5 and the transmission input shaft 4a.
The automatic transmission 4 has a gear transmission mechanism similar to the transmission gear mechanism in a known planetary gear type automatic transmission, but excludes the torque converter from the known planetary gear type automatic transmission, and instead Assume that the motor / generator 6 is directly coupled to the transmission input shaft 4a,
By selectively engaging or releasing a plurality of speed change friction elements (such as clutches and brakes), a transmission system path (speed stage) is determined by a combination of engagement and release of these speed change friction elements.

Accordingly, the automatic transmission 4 shifts the rotation from the input shaft 4a with a gear ratio corresponding to the selected shift speed, and outputs it to the output shaft 4b.
This output rotation is distributed and transmitted to the left and right rear wheels 3RL and 3RR by the differential gear device 8, and is used for traveling of the vehicle.
However, it goes without saying that the automatic transmission 4 is not limited to the stepped type as described above, and may be a continuously variable transmission.

In the hybrid vehicle described above, the second clutch 9 that releasably couples the motor / generator 6 and the drive wheels 3RL and 3RR is necessary.
In this embodiment, the second clutch 9 is not added to the automatic transmission 4 or after the automatic transmission 4, and a new configuration is not adopted.
Instead, among the above-described shift friction elements existing in the automatic transmission 4 as the second clutch 9, a shift friction element for selecting a forward shift stage (starting friction element) or a shift friction element for selecting a reverse shift stage Use the (starting friction element).

Incidentally, the automatic transmission 4 used as the second clutch 9 originally has a shift friction element for selecting a forward shift stage (starting friction element) or a shift friction element for selecting a reverse shift stage (starting friction element), Like the first clutch 7 described above, the transmission torque capacity (clutch engagement capacity) can be continuously changed.
For example, the transmission torque (clutch engagement) capacity can be changed by continuously controlling the clutch hydraulic oil flow rate and the clutch hydraulic pressure with a proportional solenoid.

  Thus, the existing shift friction element for selecting the forward shift stage (starting friction element) or the shift friction element for selecting the reverse shift stage (starting friction element) is diverted to the automatic transmission 4 as the second clutch 9. In that case, in addition to the second clutch 9 fulfilling the mode selection function described below, the automatic transmission is put into a power transmission state by shifting to the corresponding gear stage when engaged to fulfill this function, There is no need for a dedicated second clutch, which is very advantageous in terms of cost.

The power train mode selection function described above with reference to FIG. 1 will be described below.
In the power train shown in FIG. 1, when the electric driving (EV driving) mode used at low load and low vehicle speed including when starting from a stopped state is required, the first clutch 7 is disengaged and the automatic shifting is performed. The machine 4 is brought into a power transmission enabled state by engaging the second clutch 9.

When the motor / generator 6 is driven in this state, only the output rotation from the motor / generator 6 reaches the transmission input shaft 4a, and the automatic transmission 4 changes the rotation to the input shaft 4a to the selected shift speed. The speed is changed according to the speed and output from the transmission output shaft 4b.
The rotation from the transmission output shaft 4b then reaches the rear wheels 3RL and 3RR via the differential gear device 8, and the vehicle can be electrically driven (EV traveling) only by the motor / generator 6.

When the hybrid travel (HEV travel) mode used for high speed travel or heavy load travel is required, the first clutch 7 is engaged and the automatic transmission 4 can be transmitted power by engaging the second clutch 9. To.
In this state, the output rotation from the engine 1, or both the output rotation from the engine 1 and the output rotation from the motor / generator 6 reach the transmission input shaft 4a, and the automatic transmission 4 is connected to the input shaft 4a. Is rotated according to the selected gear position and output from the transmission output shaft 4b.
The rotation from the transmission output shaft 4b then reaches the rear wheels 3RL and 3RR via the differential gear device 8, and the vehicle can be hybrid-run (HEV-run) by both the engine 1 and the motor / generator 6.

  In such HEV traveling, if the engine 1 is operated with the optimum fuel efficiency and the energy becomes surplus, the surplus energy is converted into electric power by operating the motor / generator 6 as a generator by this surplus energy, and this generated power is converted into electric power. By accumulating power to be used for driving the motor of the motor / generator 6, the fuel consumption of the engine 1 can be improved.

Hereinafter, a control system for the engine 1, the motor / generator 6, the first clutch 7, and the second clutch 9 constituting the power train of the hybrid vehicle described above will be schematically described with reference to FIG.
This control system includes an integrated controller 11 that performs integrated control of the operating point of the power train. The operating point of the power train includes the target engine torque tTe, the target motor / generator torque tTm, and the target engagement capacity of the first clutch 7. It is defined by tTc1 and the target engagement capacity tTc2 of the second clutch 9.

In the integrated controller 11, in order to determine the operating point of the power train,
A signal from the engine speed sensor 12 for detecting the engine speed Ne;
A signal from the motor / generator rotation sensor 13 for detecting the motor / generator rotation speed Nm,
A signal from the input rotation sensor 14 for detecting the transmission input rotation speed Ni;
A signal from the output rotation sensor 15 that detects the transmission output rotation speed No,
A signal from the accelerator opening sensor 16 for detecting the accelerator pedal depression amount (accelerator opening APO);
A signal from a power storage state sensor 17 that detects a power storage state SOC (power that can be taken out) of the battery 31 that stores power for the motor / generator 6 is input.

  The integrated controller 11 is a driving mode in which the driving force of the vehicle desired by the driver can be realized from the accelerator opening APO, the battery storage state SOC, and the transmission output rotational speed No (vehicle speed VSP) among the above input information. (EV mode, HEV mode) is selected, and target engine torque tTe, target motor / generator torque tTm, first clutch target engagement capacity tTc1, and second clutch target engagement capacity tTc2 are calculated.

  The target engine torque tTe is supplied to the engine controller 32. The engine controller 32 realizes the target engine torque tTe based on the engine speed Ne from the engine speed Ne detected by the sensor 12 and the target engine torque tTe. Therefore, the engine 1 is controlled so that the engine torque becomes the target engine torque tTe by the throttle opening control and the fuel injection amount control.

The target motor / generator torque tTm is supplied to the motor / generator controller 33. The motor / generator controller 33 converts the electric power of the battery 31 from DC to AC by the inverter 34, and the motor / generator 6 under the control of the inverter 34. And the motor / generator torque is controlled so that the motor / generator torque matches the target motor / generator torque tTm.
If the target motor / generator torque tTm is such that the motor / generator 6 requires a regenerative braking action, the motor / generator controller 33 is connected to the battery storage state SOC detected by the sensor 17 via the inverter 34 (can be taken out) In relation to the electric power), a power generation load is applied to the motor / generator 6 so that the battery 31 is not overcharged.
The electric power generated by the motor / generator 6 due to the regenerative braking action is AC-DC converted to charge the battery 31.

When the braking force is insufficient only with the regenerative brake of the motor / generator 6, the integrated controller 11 supplies a regenerative cooperative brake control command to the brake controller 35 so as to compensate the insufficient braking force with the hydraulic brake system.
When there is no regenerative coordination brake control command, the brake controller 35 determines the brake fluid pressure of each wheel brake unit based on the signal from the master cylinder fluid pressure sensor 18 that detects the master cylinder fluid pressure Pm according to the brake pedal depression force. Is controlled to a hydraulic pressure corresponding to the master cylinder hydraulic pressure Pm.
When receiving the regenerative cooperative brake control command from the integrated controller 11, the brake controller 35 controls the brake hydraulic pressure of each wheel brake unit so that the insufficient braking force is supplemented by the hydraulic brake system.

  The first clutch target engagement capacity tTc1 is supplied to the first clutch controller 36, and the first clutch controller 36 calculates the first clutch engagement pressure control solenoid drive duty Dc1 for realizing the first clutch target engagement capacity tTc1. Then, the first clutch engagement pressure control unit 37 that responds to this control controls the engagement pressure of the first clutch 7 so as to correspond to the first clutch target engagement capacity tTc1, thereby controlling the engagement capacity of the first clutch 7. Do.

  The second clutch target engagement capacity tTc2 is supplied to the transmission controller 38, which determines the second clutch engagement pressure control solenoid drive duty Dc2 for realizing the second clutch target engagement capacity tTc2. The second clutch engagement pressure control unit 39 that responds to the second clutch 9 controls the engagement pressure of the second clutch 9 so as to correspond to the second clutch target engagement capacity tTc2.

Here, the transmission controller 38 obtains the second clutch engagement pressure control solenoid drive duty Dc2 as follows.
That is, as shown in FIG. 2, a specific calculation unit 38a for obtaining the second clutch engagement pressure control solenoid drive duty Dc2 for realizing this from the second clutch target engagement capacity tTc2 is set in the transmission controller 38. .

The specific calculation unit 38a receives the second clutch target engagement capacity tTc2 from the integrated controller 11,
First, a necessary pressure tPc2 of the second clutch 9 necessary for realizing the second clutch target engagement capacity tTc2 is obtained by calculation,
Next, the second clutch engagement pressure control solenoid pressure necessary to generate the second clutch necessary pressure tPc2 is calculated,
Thereafter, the solenoid drive duty Dc2 (solenoid drive current) of the second clutch engagement pressure control solenoid for obtaining this solenoid pressure is calculated.

  The solenoid drive duty Dc2 (solenoid drive current) obtained in this way by the specific calculation unit 38a is directed to the second clutch engagement pressure control solenoid in the second clutch engagement pressure control unit 39, whereby the second clutch 9 Is controlled so as to be the second clutch required pressure tPc2 corresponding to the second clutch target engagement capacity tTc2, and the engagement capacity control of the second clutch 9 is performed.

  It should be noted that the transmission controller 38 returns to the current operating state based on the planned shift map from the transmission output speed No (vehicle speed VSP) detected by the sensor 15 in FIG. 1 and the accelerator opening APO detected by the sensor 16. The main mission is to obtain a suitable shift speed, and to automatically shift the automatic transmission 4 to this suitable shift speed, and to perform the engagement capacity control of the second clutch 9 together with this shift control. .

  The above is an outline of the normal control executed by the control system of FIG. 1, but in this embodiment, the transmission controller 38, which is one arithmetic processing unit in the control system of FIG. 1, performs the specific calculation shown in FIG. It is assumed that an abnormality occurs in the part 38a and the second clutch 9 cannot be normally engaged / disengaged and controlled as follows.

In order to perform this monitoring, as shown in FIG. 2, although the calculation procedure is different from the calculation processing process of the specific calculation unit 38 a in the transmission controller 38, the calculation result is almost the same if the specific calculation unit 38 a is normal. The same monitoring arithmetic unit 38b is set.
The monitoring calculation unit 38b preliminarily describes the relationship between the second clutch target engagement capacity tTc2 as illustrated in FIG. 3 and the second clutch engagement pressure control solenoid drive duty Dc2 ′ (solenoid drive current) that realizes this. It is obtained by experiments and the corresponding data is built in as a map.

The monitoring calculation unit 38b receives the second clutch target engagement capacity tTc2 from the integrated controller 11, and from this and the map data corresponding to FIG.
The solenoid drive duty Dc2 ′ (solenoid drive current) of the second clutch engagement pressure control solenoid necessary to realize the second clutch target engagement capacity tTc2 is obtained by direct map search.

Further, a calculation result comparison unit 38c is set in the transmission controller 38 as shown in FIG.
Solenoid drive duty Dc2 for controlling the second clutch engagement pressure calculated by the specific calculation unit 38a,
It is assumed that the second clutch engagement pressure control solenoid drive duty Dc2 ′ obtained by the map search by the monitoring calculation unit 38b is compared as follows.

That is, when the deviation ΔDc2 = | Dc2−Dc2 ′ | between the calculation results of both the calculation units 38a and 38b is less than the minute set value for abnormality determination, the calculation result comparison unit 38c calculates the calculation results of both calculation units 38a and 38b. An operation result coincidence signal E is output to the integrated controller 11 which is another operation processing unit assuming that Dc2 and Dc2 ′ are substantially coincident (see also FIG. 1).
When the deviation ΔDc2 is greater than or equal to the set value, it is assumed that the calculation result match signal E is not output because the calculation results Dc2 and Dc2 ′ of the calculation units 38a and 38b do not match.

  When there is a calculation result coincidence signal E from the calculation result comparison unit 38c, the integrated controller 11 indicates that the calculation results Dc2 and Dc2 ′ of both the calculation units 38a and 38b are substantially the same, and the specific calculation unit 38a is normally in the second state. The solenoid drive duty Dc2 for clutch engagement pressure control is calculated, and the target motor / generator torque tTm to the motor / generator controller 33 is corrected by determining that the engagement capacity control of the second clutch 9 is normally performed. do not do.

  However, when there is no calculation result coincidence signal E from the calculation result comparison unit 38c, the integrated controller 11 indicates that the calculation results Dc2 and Dc2 ′ of both the calculation units 38a and 38b do not match, and the specific calculation unit 38a When the control solenoid drive duty Dc2 cannot be normally calculated and the engagement capacity control of the second clutch 9 is not normally performed, it is determined that the target motor / generator to the motor / generator controller 33 is determined. The torque tTm is corrected to be reduced (including tTm = 0).

  Here, the target motor / generator torque tTm at the time of abnormality in which the specific calculation unit 38a cannot normally obtain the second clutch engagement pressure control solenoid drive duty Dc2 (the engagement capacity control of the second clutch 9 cannot be performed normally). The reason why the lowering correction is performed (including tTm = 0) will be described below.

In a hybrid vehicle as shown in FIG. 1, an oil pump (not shown) of the automatic transmission 4 is driven by the motor / generator 6 even when the vehicle is stopped, and the automatic transmission using the oil discharged from the oil pump as a medium. It is necessary to be able to control the machine 4 even when it is stopped.
During this time, the second clutch 9 is released so that the stopped state can be maintained even by driving the motor / generator 6, and the rotation speed of the motor / generator 6 is the minimum necessary to enable the above control of the automatic transmission 4. Rotational speed feedback control is performed so as to maintain a constant rotational speed (about the idle rotational speed) that is a limited oil pump discharge amount.

However, when the second clutch 9 to be released as described above is erroneously engaged due to an abnormality in the specific calculation unit 38a, the motor / generator 6 whose rotational speed is decreased due to an increase in load is the rotational speed of the motor / generator 6 described above. The motor torque is increased by the rotational speed feedback control performed so as to be maintained at a constant rotational speed (about the idle rotational speed).
Thus, even when the second clutch 9 to be released is erroneously engaged due to an abnormality in the specific calculation unit 38a, if the motor / generator 6 continues the above-described rotation speed feedback control, the motor / generator 6 Due to the continuous increase, there is a possibility that the heat is abnormally generated and the durability is remarkably lowered.

However, in the present embodiment, as described above, the specific calculation unit 38a cannot normally obtain the second clutch engagement pressure control solenoid drive duty Dc2, and at the time of abnormality determination that the engagement capacity control of the second clutch 9 cannot be performed normally. In order to reduce the target motor / generator torque tTm (including tTm = 0),
Even if the second clutch 9 to be released when the vehicle stops is erroneously engaged due to an abnormality in the specific calculation unit 38a, the motor / generator 6 may continue the above-described rotation speed feedback control (increase in motor torque). This eliminates the problem of abnormal heat generation of the motor / generator 6 and a decrease in durability.

By the way, in the case of the above abnormality monitoring, a monitoring calculation unit 38b and a calculation result comparison unit 38c are set in one arithmetic processing unit (transmission controller) 38 which is an abnormality monitoring target, and the monitoring calculation unit 38b and the calculation result comparison are set. In order to monitor abnormality of the one arithmetic processing unit (transmission controller) 38 by the unit 38c and another arithmetic processing unit (integrated controller) 11 existing in the control system,
It is possible to monitor the abnormality of the one arithmetic processing unit (transmission controller) 38 without adding any other abnormality monitoring circuit outside the existing arithmetic processing units 38 and 11 and without increasing the cost. it can.

Moreover, the calculation result Dc2 of the specific calculation unit 38a in the one calculation processing unit (transmission controller) 38 and the calculation of the monitoring calculation unit 38b set in the one calculation processing unit (transmission controller) 38 In order to recognize the abnormality of the specific calculation unit 38a from the magnitude of the deviation ΔDc2 = | Dc2-Dc2 ′ | between the two by comparing with the result Dc2 ′,
Instead of monitoring the above-mentioned one arithmetic processing unit (transmission controller) 38 as a whole, the abnormality of the specific arithmetic unit 38a in the arithmetic processing unit (transmission controller) 38 is reliably monitored. To get
As the specific calculation unit, by selecting an important calculation unit (second clutch engagement pressure control solenoid drive duty calculation unit 38a) as shown in the figure, the important calculation unit (second clutch engagement pressure control solenoid drive duty) It is possible to reliably monitor the abnormality of the calculation unit 38a), and control by delaying abnormality countermeasures due to abnormality detection delay or failure to detect abnormality of the important calculation unit (second clutch engagement pressure control solenoid drive duty calculation unit 38a) The problem that the durability of the target is impaired can be solved.

  4 and 5, respectively, in the case where the integrated controller 11 and the transmission controller 38 are configured by a microcomputer, the controllers 11 and 38 are the above-described specific calculation unit (second clutch engagement pressure control solenoid drive duty calculation unit) 38a. This shows the control program used when performing abnormality monitoring and abnormality determination / countermeasure processing.

FIG. 4 is a control program executed by the transmission controller 38 for monitoring an abnormality of the specific calculation unit (second clutch engagement pressure control solenoid drive duty calculation unit) 38a.
First, in step S11, the drive duty Dc2 (solenoid drive current) of the second clutch engagement pressure control solenoid in the second clutch engagement pressure control unit 39 is calculated by normal calculation.

In this calculation, the necessary pressure tPc2 of the second clutch 9 necessary for realizing the second clutch target engagement capacity tTc2 from the integrated controller 11 is calculated as described above for the specific calculation unit 38a shown in FIG.
Next, the second clutch engagement pressure control solenoid pressure necessary to generate the second clutch necessary pressure tPc2 is calculated,
After that, the solenoid drive duty Dc2 (solenoid drive current) of the solenoid for controlling the second clutch engagement pressure for obtaining this solenoid pressure is calculated,
This is output to the second clutch engagement pressure control solenoid in the second clutch engagement pressure control unit 39, and the engagement capacity control of the second clutch 9 is performed.

In step S12, the second clutch target engagement capacity tTc2 as exemplified in FIG. 3 and the second clutch engagement pressure control solenoid drive duty to realize this are the same as described above for the monitoring calculation unit 38b shown in FIG. Based on the relationship with Dc2 '(solenoid drive current), from the second clutch target engagement capacity tTc2,
The map search is directly performed for the solenoid drive duty Dc2 ′ (solenoid drive current) of the second clutch engagement pressure control solenoid necessary to realize the second clutch target engagement capacity tTc2.

  In step S13, as described above for the calculation result comparison unit 38c shown in FIG. 2, the second clutch engagement pressure control solenoid drive duty Dc2 obtained by normal calculation in step S11 and the map search obtained in step S12 are obtained. Deviation ΔDc2 = | Dc2−Dc2 ′ | from the two-clutch engagement pressure control solenoid drive duty Dc2 ′ is obtained, and it is determined whether or not this deviation ΔDc2 is less than a minute setting value for abnormality determination.

  When it is determined in step S13 that the deviation ΔDc2 is less than the minute setting value for abnormality determination, the calculation results Dc2 and Dc2 ′ in step S11 and step S12 substantially match, and the second clutch in step S11 If the calculation of the engagement pressure control solenoid drive duty Dc2 is normally performed and the engagement capacity control of the second clutch 9 is determined to be normal, the control proceeds to step S14 and the calculation result coincidence signal E is transmitted to the integrated controller. Output to 11.

  When it is determined in step S13 that the deviation ΔDc2 is greater than or equal to the minute setting value for abnormality determination, the calculation results Dc2 and Dc2 ′ in step S11 and step S12 do not match, and the second clutch in step S11 When it is determined that the calculation of the engagement pressure control solenoid drive duty Dc2 is abnormal and the engagement capacity control of the second clutch 9 is abnormal, the control proceeds to step S15 and the calculation result coincidence signal E is output to the integrated controller 11. do not do.

  FIG. 5 shows abnormality determination and countermeasure processing performed by the integrated controller 11 in accordance with the presence / absence of the calculation result coincidence signal E. Therefore, first, in step S21, the presence / absence of the calculation result coincidence signal E is determined.

When it is determined in step S21 that the calculation result coincidence signal E is present, the calculation of the second clutch engagement pressure control solenoid drive duty Dc2 in step S11 is normally performed, and the engagement capacity control of the second clutch 9 is performed. Because it is normal,
In step S22, normality is determined, and in step S23, the target motor / generator torque tTm is not corrected.

  When it is determined in step S21 that there is no calculation result coincidence signal E, the calculation of the second clutch engagement pressure control solenoid drive duty Dc2 in step S11 is not performed normally, and the engagement capacity control of the second clutch 9 is performed. Therefore, in step S24, an abnormality is determined, and in step S25, the target motor / generator torque tTm is corrected to decrease.

  In the case where the integrated controller 11 and the transmission controller 38 are configured by a microcomputer as in this embodiment, and these are configured to execute the control programs shown in FIGS. The same function as described above can be achieved.

In any of the embodiments, when the calculation result coincidence signal E is interrupted, the abnormality determination and the motor / generator torque decrease correction are performed immediately, and fail-safe measures can be implemented without delay, which greatly benefits safety.
In addition, the integrated controller 11 only performs abnormality determination and fail-safe measures according to the presence / absence of the calculation result coincidence signal E from the transmission controller 38, so that the calculation load of the integrated controller 11 does not increase.

Furthermore, since the integrated controller 11 performs both abnormality determination and fail-safe countermeasures according to the presence or absence of the calculation result coincidence signal E from the transmission controller 38, the abnormality determination result and the fail-safe countermeasures are ensured without interruption of the signal. Can be linked,
In the control system that performs abnormal operation such that the motor / generator torque continuously increases by the above-mentioned rotation speed feedback control when the second clutch engagement capacity control malfunctions (must be disengaged although it should be released), the motor is surely / Fail-safe measures to reduce generator torque can reliably prevent abnormal operation of the motor / generator.

In each of the above embodiments, one arithmetic processing unit to be monitored for abnormality is the transmission controller 38,
The specific calculation unit to be monitored mainly for abnormality is the second clutch engagement pressure control solenoid drive duty calculation unit 38a in the transmission controller 38,
The explanation of the present invention has been expanded for the case where the arithmetic processing unit that performs abnormality determination and countermeasure against the specific arithmetic unit 38a is the integrated controller 11,
The present invention is not limited to these, and the control system is not limited to the control system of the hybrid vehicle as shown in the figure, and it goes without saying that the same operation and effect can be obtained by using in any control system.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagrammatic plan view showing a power train of a front engine / rear wheel drive hybrid vehicle including a hybrid drive device incorporating an abnormality monitoring device according to an embodiment of the present invention, together with its control system. FIG. 2 is a functional block diagram of an abnormality monitoring unit in the power train control system shown in FIG. FIG. 2 is a characteristic diagram illustrating a relationship between a target engagement capacity of a second clutch and a clutch drive pressure control solenoid drive duty in the power train shown in FIG. 3 is a flowchart showing an abnormality monitoring program when the power train control system shown in FIG. 1 is configured by a microcomputer. 3 is a flowchart showing an abnormality determination and abnormality countermeasure processing program when the power train control system shown in FIG. 1 is configured by a microcomputer.

Explanation of symbols

1 engine (motor)
2FL, 2FR Left and right front wheels
3RL, 3RR Left and right rear wheels (left and right drive wheels)
4 Automatic transmission
6 Motor / generator (motor)
7 1st clutch (clutch variable variable clutch)
9 Second clutch (engagement variable variable clutch)
11 Integrated controller (other processing units)
12 Engine rotation sensor
13 Motor / generator rotation sensor
14 Transmission input rotation sensor
15 Transmission output rotation sensor
16 Accelerator position sensor
17 Storage state sensor
18 Master cylinder hydraulic pressure sensor
31 battery
32 Engine controller
33 Motor / generator controller
34 Inverter
35 Brake controller
36 1st clutch controller
37 1st clutch engagement pressure control unit
38 Transmission controller (one arithmetic processing unit)
38a Specific operation part
38b Operation unit for monitoring
38c Operation result comparison part
39 Second clutch engagement pressure control unit

Claims (4)

A plurality of arithmetic processing units are provided, one corresponding control object is controlled by a control signal obtained by a specific arithmetic unit in one arithmetic processing unit, and another corresponding one is obtained by a control signal obtained by another arithmetic processing unit. In a control system that controls the controlled object of
In the one arithmetic processing unit,
Although the arithmetic processing process is different from that of the specific arithmetic unit in the one arithmetic processing unit, a monitoring arithmetic unit is set so that the arithmetic results are almost the same, and the deviation between the arithmetic results of both arithmetic units is a set value. Set the operation result comparison unit that outputs the operation result match signal when it is less than
The arithmetic processing unit abnormality monitoring device, wherein when the arithmetic result matching signal is not output from the arithmetic result comparison unit, the other arithmetic processing unit recognizes an abnormality of the specific arithmetic unit. In the abnormality monitoring device of the arithmetic processing unit according to claim 1, which is used for a control system in which the other control object performs an abnormal operation when the one control object malfunctions.
When the operation result coincidence signal is not output from the operation result comparison unit, the other operation processing unit recognizes an abnormality in the specific operation unit and deactivates the other control object. An abnormality monitoring device for the arithmetic processing unit. A vehicle for transmitting power from a prime mover as driving force to wheels under the control of a variable engagement clutch,
3. The abnormality monitoring device for an arithmetic processing unit according to claim 1, wherein the one control object is an engagement capacity of the engagement capacity variable clutch, and the other control object is an output of the prime mover. ,
When the calculation result coincidence signal is not output from the calculation result comparison unit, the other calculation processing unit is configured to recognize an abnormality of the specific calculation unit and reduce the output of the prime mover or to zero. An abnormality monitoring device for an arithmetic processing unit characterized by the above. The engine and motor / generator are mounted in tandem as a prime mover, the engine and motor / generator can be connected by the first variable engagement clutch, and the motor / generator and drive wheel are connected by the second variable engagement clutch. It is possible to disengage the first clutch and fasten the second clutch to enable electric travel only by the motor / generator. By fastening the first clutch and the second clutch together, the engine and the motor / A hybrid vehicle capable of hybrid driving using both generators,
The specific arithmetic unit in the one arithmetic processing unit determines a target engagement capacity of the second clutch to obtain a corresponding engagement capacity control signal of the second clutch, and the other arithmetic processing unit includes the motor / In the abnormality monitoring device for an arithmetic processing unit according to any one of claims 1 to 4, used for a control system that determines a target output of a generator and obtains a motor output control signal corresponding to the motor / generator.
When the operation result coincidence signal is not output from the operation result comparison unit, the other operation processing unit recognizes the abnormality of the specific operation unit and reduces the output of the motor / generator or makes it zero. An abnormality monitoring device for an arithmetic processing unit, characterized in that

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