JP2018159440A - Clutch performance diagnostic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect deterioration of a clutch actuator before self-propulsion of a vehicle becomes impossible.SOLUTION: A clutch performance diagnostic device (100) for diagnosing responsiveness of a clutch actuator (30) includes: a clutch performance measurement section (110) for measuring responsiveness of the clutch actuator (30); and a determination section (120) for determining performance deterioration of the clutch actuator (30) on the basis of a measurement result obtained by the clutch performance measurement section (110). The clutch performance measurement section (110) calculates an evaluation index related to the responsiveness of the clutch actuator (30) during traveling or in a traveling possible state of a vehicle, and the determination section (120) determines whether the performance of the clutch actuator (30) deteriorates on the basis of the evaluation index.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a clutch performance diagnosing apparatus for diagnosing responsiveness of a clutch actuator of a vehicle.

  The connection / disconnection of the clutch to / from the vehicle is performed by driving control of a clutch actuator by a clutch control device (for example, Patent Document 1). The clutch actuator is usually applied with control logic that finely adjusts the drive duty for loads such as electromagnetic valves and motors according to the situation, or dynamically corrects the response error of the clutch actuator by, for example, PID control. Or

Japanese Unexamined Patent Publication No. 2017-40306

  However, as a result of fine adjustment by the clutch actuator, deterioration of the clutch actuator is difficult to detect, and the abnormality is often noticed only when the clutch actuator cannot be operated. The deterioration of the clutch actuator includes, for example, deterioration of the actuator driving load of hydraulic pressure or air pressure, leakage of secrets, clogging, etc., but it is difficult to detect such performance deterioration during normal traveling. If the clutch actuator becomes inoperable, there is a concern that the vehicle will be in a state where it cannot run on its own, and the driver will perform repairs after stopping safely without driving the clutch actuator.

  Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is a novel and capable of detecting deterioration of the clutch actuator before the vehicle becomes unable to run on its own. An object of the present invention is to provide an improved clutch performance diagnostic apparatus.

  In order to solve the above-described problems, according to the present invention, a clutch performance diagnostic device for diagnosing the response of a clutch actuator, the clutch performance measuring unit for measuring the response of the clutch actuator, and the measurement by the clutch performance measuring unit A determination unit for determining performance degradation of the clutch actuator based on the result, and the clutch performance measurement unit includes an evaluation index regarding the response of the clutch actuator while the vehicle is traveling or in a travelable state. A clutch performance diagnosis device that calculates and determines whether the determination unit determines whether or not the performance of the clutch actuator has deteriorated based on the evaluation index is provided.

  As described above, according to the present invention, it is possible to detect the deterioration of the clutch actuator before the vehicle becomes unable to run on its own.

It is a schematic diagram which shows the power transmission system of the vehicle in this Embodiment. It is a functional block diagram which shows one function structure of the clutch performance diagnostic apparatus in this Embodiment. It is explanatory drawing which shows an example of the performance evaluation of a clutch actuator based on a clutch moving speed. It is explanatory drawing which shows an example of the performance evaluation of a clutch actuator based on the frequency | count of not reaching | attaining a clutch contact performance determination clutch position. It is explanatory drawing which shows an example of the performance evaluation of a clutch actuator based on the clutch disengagement holding time until it reaches | attains a clutch disengagement holding performance determination position. It is a flowchart which shows the whole flow of the diagnostic process of the responsiveness of the clutch actuator by the clutch performance diagnostic apparatus of this embodiment. It is a flowchart which shows a clutch performance defect determination process. It is a flowchart which shows the clutch disengagement holding performance confirmation process in step 200 of FIG. It is a flowchart which shows the clutch engagement performance A confirmation process in step 300 of FIG. It is a flowchart which shows the clutch engagement performance B confirmation process in step 400 of FIG. It is a flowchart which shows the clutch disengagement performance confirmation process in step 500 of FIG. It is a flowchart which shows the clutch disengagement holding | maintenance performance learning process in FIG.6 S600. It is a flowchart which shows the clutch connection performance learning process in FIG.6 S700. It is a flowchart which shows the clutch disengagement performance learning process in step S800 of FIG.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

<1. Vehicle configuration example>
(overall structure)
First, a configuration example of the vehicle 1 including the clutch control device 50 according to the present embodiment will be briefly described with reference to FIG. FIG. 1 is a schematic diagram showing a power transmission system of the vehicle 1. The vehicle 1 is, for example, an automobile or a commercial vehicle. The power transmission system of the vehicle 1 according to the present embodiment is constructed as an AMT (Automated Manual Transmission) system. In the AMT system, the connection / disconnection of the clutch 20 is automatically controlled regardless of the operation of the passenger's clutch pedal.

  The vehicle 1 includes an engine 5, a clutch 20, a transmission 40, a propeller shaft 13, a differential gear 15, left and right drive shafts 17L and 17R, and drive wheels 19RL and 19RR.

  The engine 5 is an internal combustion engine that outputs power using gasoline or the like as fuel. The output shaft 5 a of the engine 5 is connected to the input side of the power transmission system via the clutch 20. The clutch 20 switches between transmission and interruption of power between the output shaft 5 a of the engine 5 that generates power and the input shaft 11 of the transmission 40. The power transmission system of the vehicle 1 includes a clutch actuator 30 that switches connection / disconnection of the clutch 20. The operation of the clutch actuator 30 is controlled by the control device 60. The connection / disconnection of the clutch 20 is controlled by controlling the operation of the clutch actuator 30.

  The transmission 40 has, for example, a plurality of gear stages, and converts the rotational force input to the input shaft 11 at a desired gear ratio by switching the gear stages and outputs the converted torque. Switching of the gear stage is controlled by a shift control device (not shown). The propeller shaft 13 is connected to the transmission 40. Drive wheels 19RL and 19RR are connected to the left and right drive shafts 17L and 17R, respectively. The rotational force of the propeller shaft 13 is transmitted to the left and right drive shafts 17L and 17R via the differential gear 15.

  The clutch control device 50 is a device that performs drive control of the clutch actuator 30 that switches the connection and disconnection of the clutch 20 in the power transmission system of the vehicle 1. The clutch control device 50 drives the drive unit 70 based on an instruction from the control device 60 to drive the clutch actuator 30. The clutch control device 50 outputs the driving state of the clutch actuator 30 to the control device 60. The connection / disconnection of the clutch 20 is controlled by controlling the operation of the clutch actuator 30. Further, the clutch 20 is disengaged when the gear stage is switched by the speed change control device. Further, the power generated by the engine 5 when the clutch 20 is connected is transmitted to the drive wheels 19RL and 19RR, and the vehicle 1 travels.

  For example, the clutch control device 50 adjusts the stroke amount of the clutch piston by supplying hydraulic oil supplied from a hydraulic pressure source (not shown) to the working chamber of the clutch actuator 30 or discharging it from the working chamber. Switch connection / disconnection. In the clutch actuator 30, when hydraulic oil is supplied to the working chamber and the pressure in the working chamber rises, the clutch piston moves to the opposite side of the working chamber against the biasing force of the biasing member, and the clutch 20 is disconnected. . When the hydraulic oil is discharged from the working chamber, the clutch piston moves to the working chamber side by the biasing force of the biasing member, and the clutch 20 is connected. The clutch actuator 30 has a stroke sensor 51 that detects the position of the clutch piston. The detection result of the stroke sensor 51 is output to the control device 60 as the drive state of the clutch piston driven by the drive unit 70.

  The control device 60 includes a clutch performance diagnosis device that diagnoses the responsiveness of the clutch actuator 30. The clutch performance diagnosis device diagnoses the deterioration state of the clutch actuator 30 and detects the deterioration of the clutch actuator 30 before the vehicle cannot run on its own. The clutch performance diagnostic device calculates the clutch moving speed of the clutch actuator 30 based on the change in the position of the clutch piston detected by the stroke sensor 51. The clutch performance diagnosis device diagnoses whether the clutch actuator 30 is functioning normally with respect to the clutch engagement performance, the clutch disconnection performance, or the clutch disconnection retention performance based on the calculated clutch moving speed.

(Clutch performance diagnostic device)
FIG. 2 shows a configuration example of the clutch performance diagnostic apparatus 100 according to the present embodiment. FIG. 2 is a functional block diagram showing one functional configuration of the clutch performance diagnostic device 100 in the present embodiment. The clutch performance diagnostic device 100 is included in the control device 60. The control device 60 mainly includes a processor such as a CPU (Central Processing Unit) or MPU (Micro Processing Unit) and a storage device such as a RAM (Random Access Memory) or a ROM (Read Only Memory). As shown in FIG. 2, the clutch performance diagnosis apparatus 100 includes a clutch performance measurement unit 110, a determination unit 120, a notification unit 130, a self-diagnosis unit 140, and a storage unit 150. The storage unit 150 may include one or more storage devices described above. For example, the ROM stores programs executed by a processor, parameter information used for various arithmetic processes, map information, and the like. The RAM stores information acquired by the control device 60, information on the calculation results of the processor, and the like.

  The clutch performance measuring unit 110 includes, for example, a processor and an electric circuit, and calculates an evaluation index used for diagnosis of clutch performance based on the position and time of the clutch piston. For example, the clutch performance measuring unit 110 measures the clutch moving speed of the clutch actuator 30 as an evaluation index. The clutch moving speed can be used for diagnosis of clutch disengagement performance or clutch engagement performance, for example. The clutch moving speed is calculated based on the position of the clutch piston detected by the stroke sensor 51 at a predetermined timing. The clutch performance measuring unit 110 measures the clutch moving speed, for example, the time taken for the clutch piston to move by a predetermined clutch moving amount in a state where the driving load is energized at a fixed duty value (including 0%). May be measured and calculated. Or the clutch performance measurement part 110 may measure the displacement amount of the clutch piston in the predetermined time set beforehand, and may calculate a clutch moving speed.

  The clutch performance measuring unit 110 sets a duty value as a fixed duty value immediately before the clutch is engaged, for example, as an evaluation index used for diagnosis of the clutch engagement performance. The number of times when the clutch piston has not reached the clutch contact performance determination clutch position) may be counted. Furthermore, the clutch performance measuring unit 110 uses a predetermined position (clutch) when the clutch 20 is set in advance as an evaluation index used for diagnosing the clutch disengagement holding performance while the clutch actuator 30 is stopped after completion of the clutch disengagement operation. The clutch disengagement holding time reaching the disengagement holding performance determination position) may be measured. The evaluation index calculated or measured by the clutch performance measurement unit 110 is output to the determination unit 120.

  The determination unit 120 includes, for example, a processor and an electric circuit, and determines performance degradation of the clutch actuator 30 based on the evaluation index input from the clutch performance measurement unit 110. The determination unit 120 determines the performance deterioration by comparing the evaluation range with a specified range in which it is possible to determine that the actuator performance to be diagnosed is normal with respect to the clutch engagement performance, the clutch disconnection performance, or the clutch disconnection retention performance. The specified range used for the performance deterioration determination of each actuator performance is recorded in the storage unit 150 in advance. When the determination unit 120 determines that the actuator performance has deteriorated, the determination unit 120 instructs the notification unit 130 to alert the driver.

  The notification unit 130 is a functional unit capable of notifying the driver of information, and includes an output unit that outputs information and an output control unit that controls output by the output unit. The notification unit 130 may be, for example, a display or lamp that can display information, or a speaker that outputs sound.

  The self-diagnosis unit 140 includes, for example, a processor, an electric circuit, and the like, and performs performance diagnosis of the clutch actuator in a situation where the clutch can be engaged / disengaged. In the clutch performance diagnostic apparatus 100 according to the present embodiment, an evaluation index for diagnosing the performance of the clutch actuator 30 is calculated or measured by the clutch performance measuring unit 110 while the vehicle is traveling or in a travelable state. In some cases, measurement information necessary for obtaining the information cannot be acquired. The self-diagnosis unit 140 performs performance diagnosis of the clutch actuator 30 in a situation where the clutch can be engaged / disengaged when measurement information necessary for determining performance degradation of the clutch actuator 30 cannot be acquired. The situation where the clutch can be engaged / disengaged is, for example, when the gear is set to neutral and the vehicle is stopped. By providing the self-diagnosis unit 140, even when it is difficult to acquire an evaluation index of actuator performance during normal traveling, the evaluation index can be acquired by self-diagnosis and the actuator performance can be evaluated.

  The storage unit 150 stores a specified range used for performance deterioration determination of each actuator performance. In the storage unit 150, for example, a moving speed allowable range when the clutch moving speed is used as an evaluation index, a permissible prescribed number when the number of times the clutch contact performance determination clutch position is not reached is used as an evaluation index, and a clutch disengagement holding as an evaluation index The allowable time and the like when using the clutch disengagement holding time until reaching the performance determination position is recorded as a specified range.

<2. Diagnosis of clutch actuator responsiveness using clutch performance diagnostic device>
Hereinafter, the responsiveness diagnosis process of the clutch actuator 30 by the clutch performance diagnosis apparatus 100 according to the present embodiment will be described.

(2-1. Evaluation example of clutch actuator performance)
Prior to the description of the clutch actuator responsiveness diagnosis process, an example of evaluating the clutch actuator performance will be described with reference to FIGS. The clutch performance diagnosis apparatus 100 according to the present embodiment diagnoses clutch engagement performance, clutch disconnection performance, and clutch disconnection retention performance.

(1) Evaluation based on clutch moving speed (clutch engagement performance or clutch disengagement performance)
FIG. 3 shows an example of performance evaluation of the clutch actuator 30 based on the clutch moving speed. FIG. 3 shows three cases A1 to A3 having different clutch moving speeds. Although FIG. 3 shows the case where the clutch engagement performance is evaluated, the clutch disengagement performance can be similarly evaluated.

  In the clutch engagement performance evaluation based on the clutch movement speed, it is determined whether or not the clutch movement speed in the stroke from the clutch disengagement to the clutch engagement is within a specified range. When the clutch moving speed is smaller than the specified range, it can be determined that the response of the clutch actuator is degraded.

  Here, as shown in FIG. 3, the change in the clutch moving speed is large immediately after the start of the clutch movement from the clutch disengagement position and immediately before the completion of the clutch arrival at the clutch engagement position. Therefore, in this embodiment, the clutch engagement performance is evaluated based on the clutch moving speed in the intermediate region in which the clutch moving speed can be regarded as being substantially constant during the stroke of the clutch 20. The intermediate area may be arbitrarily set as an area in which the normal clutch moving speed can be regarded as substantially constant among the stroke areas from the clutch disengagement position to the clutch engagement position. In other words, the intermediate region is a range from the measurement start clutch position at which measurement of the position of the clutch piston for calculating the clutch moving speed is started to the measurement end clutch position at which measurement of the position of the clutch piston is ended.

  When the clutch 20 is moved from the clutch disengagement to the clutch engagement, when the movement of the clutch piston is started at a fixed duty value, the clutch performance measuring unit 110 detects that the clutch piston has reached the measurement start clutch position. Start time measurement. When it is detected that the clutch piston has reached the measurement end clutch position, the clutch performance measurement unit 110 ends the time measurement. The time from the start to the end of time measurement is defined as a response time t. The response time t is the time required for the movement of the intermediate region in the stroke region of the clutch 20, and when the movement distance of the clutch piston in the intermediate region is X, the clutch moving speed V in the intermediate region is expressed by the following equation (1). Is done.

Clutch moving speed V = (measurement end clutch position−measurement start clutch position) / response time
= Moving distance X / Response time t (1)

  Since the moving distance X is constant in the above equation (1), the clutch moving speed V changes according to the response time t. As shown in FIG. 3, the response time t becomes shorter as time t1 as the time from the clutch disengagement to the clutch engagement becomes shorter as in the case A1, and the time from the clutch disengagement to the clutch engagement as in the case A3. The longer it is, the longer it is at time t3. As the response time t becomes longer, the clutch moving speed V becomes lower, and there is a concern that the response of the clutch actuator 30 may be lowered. Therefore, when the clutch moving speed V calculated from the equation (1) becomes smaller than the specified range, it can be determined that the clutch engagement performance has deteriorated.

  The clutch disengagement performance can be evaluated in the same manner as the clutch contact property. When the clutch 20 is disengaged from the clutch engagement and the clutch piston starts to move at a fixed duty value, the clutch performance measuring unit 110 detects that the clutch piston reaches the measurement start clutch position when the clutch is disengaged. Time measurement starts. When it is detected that the clutch piston has reached the measurement end clutch position when the clutch is disengaged, the clutch performance measurement unit 110 ends the time measurement. The clutch performance measuring unit 110 calculates the clutch moving speed V based on the above equation (1) based on the measured response time t and the moving distance X of the clutch piston. When the calculated clutch moving speed V becomes smaller than the specified range, it can be determined that the clutch disengagement performance has deteriorated.

  In the above description, the response time is measured and the clutch movement speed is calculated with the movement distance constant. For example, the clutch movement speed may be calculated by measuring the movement distance when the response time is constant in the intermediate region. Good.

(2) Clutch engagement performance determination Evaluation based on the number of times the clutch position has not been reached (clutch engagement performance)
FIG. 4 shows an example of performance evaluation of the clutch actuator 30 based on the number of times the clutch engagement performance determination clutch position has not been reached. In this clutch engagement performance evaluation, every time a stroke from clutch disengagement to clutch engagement is performed, the clutch is determined at the clutch engagement performance determination clutch position within a predetermined specified time from when the indefinite duty value is set to a fixed duty value. Determine if the piston has reached. Clutch engagement performance determination When the number of times the clutch position has not reached the clutch position is greater than the specified number, it can be determined that the clutch engagement performance has deteriorated. This evaluation method is particularly effective for a vehicle that has few opportunities for outputting a fixed duty during normal driving.

As shown in FIG. 4, when the clutch 20 is changed from clutch disengagement to clutch engagement, the duty value is indefinite, but when the clutch position reaches the output start position of the fixed duty value, the duty value becomes the fixed duty value. Energization is performed to connect the clutch 20. At this time, the clutch performance measurement unit 110 measures the time (measurement arrival time) until the clutch piston reaches the clutch contact performance determination clutch position immediately before the clutch piston position reaches the clutch contact position after setting the fixed duty value. . The shorter the measurement arrival time, the faster the clutch engagement is performed and it is determined that the clutch engagement performance is good. Reaching evaluation to the clutch contact performance determination the clutch position of the clutch piston, for example, be carried out by whether or not the measurement time of arrival is equal to or less than the specified time T _A, after setting the fixed duty value, the clutch piston specified time T _A The determination may be made depending on whether or not the clutch engagement performance determination clutch position has been reached.

For example, as shown in case B1 in FIG. 4, after setting the fixed duty value, and when the clutch piston has reached the clutch contact performance determination clutch position within the specified time T _A, the clutch contact characteristics are good Can be judged. On the other hand, for example, as shown in the case B2 in FIG. 4, after setting the fixed duty value, when the clutch piston has not reached the clutch contact performance determination clutch position within the specified time T _A is within the specified time T _A The number of unreachable clutch engagement performance determination clutch positions is counted. Such a determination is performed, for example, every time the clutch is engaged. When the unreachable number exceeds the specified number, it is determined that there is a high possibility that the clutch engagement performance is defective.

The prescribed number of times may be, for example, a half of the number of evaluations before the evaluation of arrival of the clutch piston at the clutch contact performance determination clutch position. In other words, a probability of 50% or more, after setting the fixed duty value, when the clutch piston is a state that does not reach the clutch contact performance determination clutch position within the specified time T _A, determines that the clutch contact performance is poor May be.

  This evaluation based on the number of times the clutch contact performance determination clutch position has not been reached is effective in the case of a vehicle with few opportunities for outputting a fixed duty during normal traveling as described above. Such evaluation can be performed based on normal clutch operation. Therefore, the clutch engagement performance can be evaluated based on the clutch moving speed as described above. For example, the clutch engagement performance is determined to be poor by the evaluation based on the number of times the clutch position is not reached. In such a case, re-evaluation may be performed based on the clutch moving speed in order to make a diagnosis with higher accuracy.

(3) Evaluation based on the clutch disengagement holding time until the clutch disengagement performance determination position is reached (clutch disengagement retention performance)
FIG. 5 shows an example of performance evaluation of the clutch actuator 30 based on the clutch disengagement holding time until the clutch disengagement performance determination position is reached. In this clutch disengagement holding performance evaluation, the position of the clutch piston that moves to the clutch engagement side is evaluated while the driving of the clutch actuator 30 is stopped after the completion of the clutch disengagement operation for disengaging the clutch from the clutch engagement.

If the airtightness of the clutch actuator is low, the clutch disengaged state cannot be maintained. In this case, as shown in the case C1 in FIG. 5, the clutch disconnection and to the clutch disconnection state time should retain after the (clutch disconnection retention specified time) before the expiration of T _B, the state of the clutch disconnection is held The position of the clutch piston is moved to the clutch contact side from the clutch disengagement holding performance determination position that can be determined as being. Thus, when the position of the clutch piston before the expiration of clutch disconnection retention specified time T _B has reached the clutch disconnection retention performance determination position can be determined that the clutch disconnection retention performance is defective. On the other hand, as shown in the case C2 in Figure 5, when the position of the clutch piston also after the clutch disconnection retention specified time T _B does not reach the clutch disconnection retention performance determination position, clutch disconnection retention performance is normal It can be determined that there is.

  The evaluation based on the clutch disengagement holding time until the clutch disengagement holding performance determination position is reached is performed when the gear is neutral. Such evaluation may be interrupted when the gear is connected from neutral.

  By performing the clutch actuator performance evaluation as described above, the clutch engagement performance, the clutch disconnection performance, and the clutch disconnection retention performance can be diagnosed.

(2-2. Diagnosis processing example of clutch actuator performance)
Hereinafter, based on FIGS. 6 to 14, the diagnosis process of the response of the clutch actuator will be described. FIG. 6 is a flowchart showing the overall flow of the clutch actuator responsiveness diagnosis process by the clutch performance diagnostic apparatus 100 of the present embodiment. 7 to 11 show detailed processing related to the clutch performance failure determination processing in step S100 of FIG. 12 to 14 show a learning process at the time of self-diagnosis by the self-diagnosis unit 140.

(1) Overall Processing Configuration First, the overall processing configuration will be described with reference to FIG. The clutch actuator responsiveness diagnosing process by the clutch performance diagnosing device 100 of the present embodiment is started after the start of driving of the vehicle. When the clutch actuator 30 is hydraulic, the response varies depending on the oil temperature. For this reason, for example, the diagnosis process may be started when the oil temperature becomes equal to or higher than a predetermined temperature at which the response of the clutch actuator 30 is stabilized.

(S10: Self-learning necessity determination)
As shown in FIG. 6, first, it is confirmed whether or not it is necessary to perform a learning process at the time of self-diagnosis by the self-diagnosis unit 140 in order to perform the clutch performance failure determination process of step S100 (S10). . If the measurement information necessary for determining the performance deterioration of the clutch actuator 30 cannot be acquired by the clutch performance measurement unit 110 while the vehicle is traveling or in a travelable state, the clutch performance failure determination process cannot be performed. Therefore, in step S10, it is determined whether or not the clutch performance failure determination process is possible. If it is determined in step S10 that the learning process is not necessary, the process proceeds to step S100, and the clutch performance failure determination process is performed. On the other hand, when it is determined in step S10 that the learning process needs to be performed, the process proceeds to step S20, and the learning process is executed. If the vehicle cannot perform self-diagnosis, the learning process after step S20 cannot be performed. Therefore, the process proceeds to step S100, and the clutch performance failure determination process may be performed.

(S100: clutch performance failure determination process)
When it is determined in step S10 that the learning process is not necessary, the clutch performance measurement unit 110, the determination unit 120, and the notification unit 130 perform the clutch performance failure determination process (S100). Details of the clutch performance failure determination process in step S100 will be described later. When the clutch performance failure determination process in step S100 is completed, the process proceeds to step S60.

(S20 to S50, S600 to S800: self-learning process)
On the other hand, when it is determined in step S10 that the learning process needs to be performed, the process proceeds to step S20, and the learning process by the self-diagnosis unit 140 is executed. In the learning process, first, it is determined whether or not the vehicle is in a learnable state (S20). The state in which learning is possible refers to a state in which the clutch can be engaged / disengaged, for example, a state in which the gear is set to neutral and the vehicle is stopped. If this condition is not satisfied, the process proceeds directly to step S60. On the other hand, when the vehicle is in a learnable state, whether the clutch disengagement holding performance is unconfirmed (S30), whether the clutch disengagement performance is unconfirmed (S40), or whether the clutch disengagement performance is unconfirmed (S50). Are confirmed sequentially. If there is a performance of the clutch actuator that has not been confirmed, a clutch disengagement holding performance learning process (S600), a clutch engagement performance learning process (S700), or a clutch disengagement performance learning process (S800) is performed. Information for enabling execution of the clutch performance failure determination process is acquired. Details of the clutch disengagement performance learning process (S600), the clutch engagement performance learning process (S700), and the clutch disengagement performance learning process (S800) will be described later. If it is determined in steps S30 to S50 that all performances have been confirmed, the process proceeds to step S60. After performing the self-learning process in steps S20 to S50 and S600 to S800, the clutch performance failure determination process in step S100 is performed.

(S60, S70: diagnosis end determination)
After the clutch performance failure determination process in step S100 is performed, or when it is determined in step S20 that the vehicle is not in a learnable state, or in steps S30 to S50, it is determined that all performance has been confirmed. In this case, it is determined whether the vehicle is key-off and the drive is stopped (S60). If the vehicle is not key-off, the processing from step S10 is repeatedly performed at the next timing after a predetermined time has elapsed (S70). On the other hand, when the vehicle is keyed off, the diagnosis process of the clutch actuator 30 shown in FIG. 6 is ended.

(2) Clutch performance failure determination processing The clutch performance failure determination processing in step S100 of FIG. 6 will be described with reference to FIGS. FIG. 7 is a flowchart showing a clutch performance failure determination process. FIG. 8 is a flowchart showing the clutch disengagement holding performance confirmation process in step 200 of FIG. FIG. 9 is a flowchart showing the clutch engagement performance A confirmation process in step 300 of FIG. FIG. 10 is a flowchart showing the clutch engagement performance B confirmation process in step 400 of FIG. FIG. 11 is a flowchart showing the clutch disengagement performance confirmation processing in step 500 of FIG.

  In the clutch performance failure determination process, as shown in FIG. 7, it is first determined whether or not the clutch disengagement operation for disengaging the clutch from the clutch engagement is completed (S110). When the clutch disengagement operation is completed, a clutch disengagement holding performance confirmation process is performed (S200). The clutch disengagement holding performance confirmation process is performed based on, for example, evaluation based on the clutch disengagement holding time until the clutch disengagement performance determination position shown in FIG. 5 is reached.

  Here, the clutch disengagement holding performance confirmation processing will be described with reference to FIG. The clutch performance measuring unit 110 first checks whether or not the clutch disengagement holding performance is being confirmed (S210). If the confirmation of the clutch disengagement holding performance has not been started, the clutch performance measuring unit 110 starts a timer and starts measuring the clutch disengagement holding time (S260). After starting the clutch disengagement time measurement, the clutch disengagement holding performance is being confirmed, and the process returns to step S210.

  When it is determined in step S210 that the confirmation of the clutch disengagement holding performance has been started, the clutch performance measuring unit 110 determines whether or not the clutch piston has reached the clutch disengagement retaining performance determination position (S220). When the clutch piston has reached the clutch disengagement holding performance determination position in step S220, the determination unit 120 determines that the clutch disengagement holding performance is defective, and notifies the defect by the notification unit 130 (S230). Then, the clutch performance diagnosis apparatus 100 determines that the clutch disengagement holding performance has been confirmed (S250), ends the processing in FIG. 8, and returns to the processing in FIG.

On the other hand, when the clutch piston has not reached the clutch disconnection retention performance determination position at step S220, the clutch performance measurement unit 110, clutch disconnection retention time to check whether it has passed the clutch disconnection retention specified time T _B (S240). When the clutch disconnection holding period has not exceeded the clutch disconnection retention specified time T _B repeats the process from step S220. When the clutch disconnection retention time has elapsed clutch disconnection retention specified time T _B, the determination unit 120, since the clutch piston has passed the clutch disconnection retention specified time T _B without reaching the clutch disconnection holding performance determining position, clutch disconnection The holding performance is determined to be normal. Thereafter, the clutch performance diagnostic apparatus 100 determines that the clutch disengagement holding performance has been confirmed (S250), ends the processing in FIG. 8, and returns to the processing in FIG.

  Returning to the description of FIG. 7, when the clutch disengagement holding performance confirmation process in step S200 is completed, the clutch performance failure determination process in FIG. 7 is terminated, and the process proceeds to step S60 in FIG. On the other hand, if it is determined in step S110 that the clutch disengagement operation has not been completed, it is assumed that the clutch performance diagnostic device 100 has finished checking the clutch disengagement holding performance (S120). Then, the clutch performance diagnosis apparatus 100 starts a clutch engagement performance A confirmation process (S300). The clutch engagement performance A confirmation process is performed based on, for example, evaluation based on the number of times the clutch engagement performance determination clutch position shown in FIG. 4 has not been reached.

  Here, the clutch engagement performance A confirmation process will be described with reference to FIG. The clutch performance measuring unit 110 first confirms whether or not the clutch 20 is in a state where the clutch is engaged (S301). When the clutch is not engaged, the control device 60 stops outputting the fixed duty value and outputs the normal duty value (S303). When the normal duty value is output, the clutch performance measuring unit 110 repeats the processing from step S301.

  On the other hand, when it is determined in step S301 that the clutch 20 is in a clutch engagement state, the clutch performance measurement unit 110 determines whether or not a fixed duty value is being output (S305). When the fixed duty value is not being output, the clutch performance measuring unit 110 determines whether or not the position of the clutch piston has reached the output start clutch position having the fixed duty value (S307). When the position of the clutch piston has not reached the output start clutch position of the fixed duty value, the clutch performance measuring unit 110 repeats the processing from step S301. Such a state is a state in which the position of the clutch piston has not reached the output start clutch position of the fixed duty value, and the duty value is indefinite. On the other hand, when the position of the clutch piston reaches the output start clutch position of the fixed duty value, output of the fixed duty value is started by the control device 60, and a timer is started by the clutch performance measuring unit 110, and the duty which has been indefinite. Measurement of the elapsed time from the time when the value is a fixed duty value is started (S309). Thereafter, the clutch performance measuring unit 110 repeats the processing from step S301.

If at step S305 it is determined to be in the output of the fixed duty value, the clutch performance measuring unit 110 determines whether the elapsed time measured by the timer has exceeded the specified time T _A (S311) . Clutch performance measuring unit 110 repeats the processing from step S301 until the elapsed time has exceeded the specified time T _A. Then, when the specified time T _A has elapsed, the determination unit 120 determines whether or not the position of the clutch piston has reached the clutch engagement performance determination clutch position until the specified time T _A has elapsed (S313). ). When the position of the clutch piston has not reached the clutch engagement performance determination clutch position, the determination unit 120 determines that the clutch engagement performance is normal. Thereafter, the clutch performance diagnosis apparatus 100 finishes the process of FIG. 8 assuming that the clutch engagement performance A has been confirmed, and returns to the process of FIG.

On the other hand, if the position of the clutch piston has reached the clutch contact performance determining clutch position, the determination unit 120 clutch contact performance determination the clutch position in within the specified time T _A between the period until predetermined time T _A at step S313 +1 is counted to the number of times that has not been reached (S315). Then, the determination unit 120 determines whether or not the number of unreached times exceeds the specified number of times (S317). When the number of unreached times exceeds the specified number of times, the determination unit 120 determines that there is a high possibility that the clutch engagement performance is defective. Then, the notification unit 130 notifies the clutch engagement performance failure (S319). Thereafter, the clutch performance diagnosis apparatus 100 finishes the process of FIG. 8 assuming that the clutch engagement performance A has been confirmed, and returns to the process of FIG.

  Returning to the description of FIG. 7, when the clutch engagement performance A confirmation process in step S300 is completed, the clutch performance diagnostic device 100 determines again whether the clutch engagement operation is in progress (S130). If the clutch is engaged, a clutch engagement performance B confirmation process is performed (S400). The clutch engagement performance B confirmation process is performed based on the evaluation based on the clutch moving speed shown in FIG. 3, for example.

  Here, the clutch engagement performance B confirmation process will be described with reference to FIG. The clutch performance measuring unit 110 determines whether or not the clutch moving speed is being measured (S410). When the clutch moving speed is not being measured, the clutch performance measuring unit 110 determines whether or not the measurement of the clutch moving speed has been started (S460). The state in which measurement of the clutch moving speed is not started is when it is detected that the position of the clutch piston has reached the measurement start clutch position of the clutch piston when the clutch 20 is brought into clutch engagement from the clutch disengagement. When the clutch movement speed measurement is not started, the clutch performance measurement unit 110 starts measuring time and determines that the clutch movement speed is being measured (S470), and returns to step S410.

  If it is determined in step S410 that the clutch moving speed is being measured, the clutch performance measuring unit 110 determines whether or not the clutch piston has reached the measurement end clutch position (S420). The process of step S420 is repeatedly executed until the clutch piston reaches the measurement end clutch position. When the clutch piston reaches the measurement end clutch position, the clutch performance measuring unit 110 calculates the clutch moving speed based on the above equation (1) based on the measured response time and the moving distance of the clutch piston (S430). .

  Thereafter, the determination unit 120 determines whether or not the clutch moving speed is within a specified range (S440). If the clutch moving speed is within the specified range, the clutch engagement performance is assumed to be normal, and the process of FIG. 10 is terminated, and the process returns to the process of FIG. On the other hand, when it is determined in step S440 that the clutch moving speed is not within the specified range, the determination unit 120 determines that the clutch engagement performance is defective, and the notification unit 130 notifies the defect (S450). . Then, the clutch performance diagnostic apparatus 100 finishes the process of FIG. 10 assuming that the clutch engagement performance B has been confirmed, and returns to the process of FIG.

  Returning to the description of FIG. 7, when the clutch engagement performance B confirmation process in step S <b> 400 is completed, the process proceeds to step S <b> 60 in FIG. 6. On the other hand, if it is determined in step S130 that the clutch engagement operation is not in progress, the clutch performance diagnosis apparatus 100 has finished checking the clutch engagement performance (clutch engagement performance A and clutch engagement performance B) ( S140). Then, the clutch performance diagnostic device 100 confirms the clutch disengagement performance as well as the clutch engagement performance. First, the clutch performance diagnosis apparatus 100 determines whether the clutch disengaging operation is in progress (S150). If the clutch is being disengaged, clutch disengagement performance confirmation processing is performed (S500). The clutch disengagement performance confirmation process is performed based on the evaluation based on the clutch moving speed shown in FIG. 3, for example. That is, the same confirmation process as the clutch engagement performance B shown in FIG. 10 is performed.

  Here, the clutch disengagement performance confirmation process will be described with reference to FIG. First, the clutch performance measuring unit 110 determines whether or not the clutch moving speed is being measured (S510). When the clutch moving speed is not being measured, the clutch performance measuring unit 110 determines whether or not the measurement of the clutch moving speed has been started (S560). The state in which measurement of the clutch moving speed is not started is when it is detected that the position of the clutch piston has reached the measurement start clutch position of the clutch piston when the clutch 20 is disengaged from the clutch engagement. When the clutch movement speed measurement is not started, the clutch performance measurement unit 110 starts time measurement and is measuring the clutch movement speed (S570), and returns to the process of step S510.

  When it is determined in step S510 that the clutch moving speed is being measured, the clutch performance measuring unit 110 determines whether or not the clutch piston has reached the measurement end clutch position (S520). The process of step S520 is repeatedly executed until the clutch piston reaches the measurement end clutch position. When the clutch piston reaches the measurement end clutch position, the clutch performance measuring unit 110 calculates the clutch moving speed based on the above equation (1) based on the measured response time and the moving distance of the clutch piston (S530). .

  Thereafter, the determination unit 120 determines whether or not the clutch moving speed is within a specified range (S540). If the clutch moving speed is within the specified range, it is determined that the clutch disengagement performance is normal, and the process of FIG. 11 is terminated and the process returns to the process of FIG. On the other hand, when it is determined in step S540 that the clutch moving speed is not within the specified range, the determination unit 120 determines that the clutch disengagement performance is defective, and the notification unit 130 notifies the defect (S550). . Then, the clutch performance diagnosis apparatus 100 finishes the process of FIG. 11 assuming that the clutch disengagement performance has been confirmed, and returns to the process of FIG.

  Returning to the description of FIG. 7, when the clutch disengagement performance confirmation processing in step S <b> 500 ends, the process proceeds to step S <b> 60 in FIG. 6. On the other hand, when it is determined in step S150 that the clutch disengagement state is not in effect, the clutch performance diagnosis apparatus 100 determines that the clutch disengagement performance has been confirmed (S160). Thereafter, the clutch performance failure determination process in FIG. 7 is terminated, and the process proceeds to step S60 in FIG.

(3) Self-learning process The clutch performance failure determination process shown in FIG. 7 is performed when measurement information necessary for determining the performance deterioration of the clutch actuator 30 can be acquired by the clutch performance measurement unit 110 while the vehicle is traveling or in a travelable state. However, it cannot be executed if necessary measurement information cannot be acquired. In this case, when diagnosing the clutch disengagement holding performance, the clutch disengagement performance, and the clutch disengagement performance by the clutch performance defect determination process, the clutch performance defect determination process is executed after obtaining the measurement information by the self-diagnosis unit 140. At this time, the self-diagnosis unit 140 actually operates the clutch actuator 30 and acquires insufficient measurement information.

(A. Clutch disengagement holding performance learning process)
First, when the measurement information in the diagnosis of the clutch disengagement holding performance is insufficient, the self-diagnosis unit 140 executes the clutch disengagement holding performance learning process in step 600 of FIG. FIG. 12 shows the clutch disengagement holding performance learning process. As shown in FIG. 12, the self-diagnosis unit 140 first determines whether or not the clutch disengagement holding performance is being learned (S610). If the clutch disengagement holding performance is being learned, after learning the clutch disengagement retention performance, the measurement result is output from the self-diagnosis unit 140 to the determination unit 120 (S620). Thereafter, the determination unit 120 performs the clutch performance failure determination process of FIG.

On the other hand, when it is determined in step S610 that the clutch disengagement holding performance is not being learned, the self-diagnosis unit 140 determines whether or not learning clutch disengagement control is being performed (S630). For example, as shown in FIG. 5, the learning clutch disengagement control is performed by first de-energizing the clutch piston from the clutch contact position to the clutch disengagement position, and then setting the duty value to 0 when the clutch disengages. Check the clutch disengagement retention performance. And allowed from the time when the state of the clutch disconnection clutch disconnection retention specified time elapsed T _B. Such a series of control is implemented as learning clutch disengagement control. When it is determined in step S630 that the learning clutch disengagement control is not being performed, the self-diagnosis unit 140 starts the learning clutch disengagement control for the clutch actuator 30 (S640), and the process returns to step S630. .

If it is determined in step S630 that the learning clutch disengagement control is being performed, the self-diagnosis unit 140 determines whether or not the control from the clutch engagement to the clutch disengagement for the learning clutch disengagement control has been completed. A determination is made (S650), and the processing from step S630 is repeated until the clutch is disengaged. When the clutch is disengaged (S660), the self-diagnosis unit 140 sets the duty value to 0 and starts learning the clutch disengagement holding performance (S670). Until step S670 clutch disconnection retention specified time elapses T _B, the position of the clutch piston monitors whether exceeds the clutch disconnection holding performance determination position. Thereafter, the process returns to step S610, and after learning the clutch disengagement holding performance, the measurement result is output from the self-diagnosis unit 140 to the determination unit 120 (S620).

  As described above, in the clutch disengagement holding performance learning process, the clutch actuator 30 is controlled as shown in FIG. 5, and the measurement result at that time is acquired, so that the clutch disengagement performance diagnosis in the clutch performance defect determination process shown in FIG. Enable execution.

(B. Clutch engagement performance learning process)
Next, when the measurement information in the diagnosis of the clutch engagement performance learning process is insufficient, the self-diagnosis unit 140 executes the clutch engagement performance learning process of Step 700 of FIG. FIG. 13 shows the clutch engagement performance learning process. As shown in FIG. 13, the self-diagnosis unit 140 first determines whether or not the clutch engagement control for learning from the clutch disengagement to the clutch engagement is being implemented (S710). If the learning clutch engagement control is being implemented, the clutch moving speed is calculated from the measurement result after the completion of the control, and is output from the self-diagnosis unit 140 to the determination unit 120 (S720). Thereafter, the determination unit 120 performs the clutch performance failure determination process of FIG.

  On the other hand, when it is determined in step S710 that the clutch engagement control for learning is not being implemented, the self-diagnosis unit 140 determines whether or not the clutch is disengaged (S730). When it is determined in step S730 that the clutch is not disengaged, the self-diagnosis unit 140 starts to perform clutch disengagement control for moving the clutch piston so that the clutch actuator 30 is disengaged (S740). ), The process returns to step S730.

  If it is determined in step S730 that the clutch is disengaged, the self-diagnosis unit 140 starts the learning clutch engagement control (S750). Thereby, measurement of the time until the clutch piston reaches the measurement end clutch position from the measurement start clutch position is started. Thereafter, the process returns to step S710, and after completion of the learning clutch engagement control, the self-diagnosis unit 140 calculates the clutch moving speed based on the above equation (1) from the measurement result, and outputs the calculation result to the determination unit 120. (S720).

  As described above, in the clutch engagement performance learning process, the clutch actuator 30 is controlled as shown in FIG. 3, and the measurement result at that time is acquired, thereby executing the clutch engagement performance diagnosis in the clutch performance failure determination process shown in FIG. Enable.

(C. Clutch disengagement performance learning process)
When the measurement information in the diagnosis of the clutch disengagement performance learning process is insufficient, the self-diagnosis unit 140 executes the clutch disengagement performance learning process in step 800 of FIG. 6 in the same manner as the clutch engagement performance learning process. FIG. 14 shows the clutch disengagement performance learning process. As shown in FIG. 13, first, the self-diagnosis unit 140 determines whether or not learning clutch disengagement control for disengaging from clutch engagement is being performed (S810). If the learning clutch disengagement control is being implemented, the clutch moving speed is calculated from the measurement result after the end of the control, and is output from the self-diagnosis unit 140 to the determination unit 120 (S820). Thereafter, the determination unit 120 performs the clutch performance failure determination process of FIG.

  On the other hand, when it is determined in step S810 that the learning clutch disengagement control is not being performed, the self-diagnosis unit 140 determines whether or not the clutch is engaged (S830). When it is determined in step S830 that the clutch is not engaged, the self-diagnosis unit 140 starts the clutch engagement control for moving the clutch piston so that the clutch actuator 30 is in the clutch engaged state (S840). ), The process returns to step S830.

  If it is determined in step S830 that the clutch is engaged, the self-diagnosis unit 140 starts performing learning clutch disengagement control (S850). Thereby, measurement of the time until the clutch piston reaches the measurement end clutch position from the measurement start clutch position is started. Thereafter, the process returns to step S810, and after completion of the learning clutch disengagement control, the self-diagnosis unit 140 calculates the clutch moving speed based on the above equation (1) from the measurement result, and outputs the calculation result to the determination unit 120. (S720).

  As described above, in the clutch disengagement performance learning process, the clutch actuator 30 is controlled as shown in FIG. 3, and the measurement result at that time is acquired, so that the clutch disengagement performance diagnosis is performed in the clutch performance defect determination process shown in FIG. Enable.

  As described above, by the self-learning process by the self-diagnosis unit 140, it is possible to acquire measurement information that is insufficient for diagnosing the clutch disengagement holding performance, the clutch engagement performance, and the clutch disengagement performance in the clutch performance defect determination processing. It becomes. Such self-learning processing is performed in a state where the clutch can be engaged / disengaged, such as a state where the gear is set to neutral and the vehicle is stopped, but in other cases, for example, periodic vehicle inspection at a dealer It is also possible to execute a self-learning process at a time, etc., and to execute a clutch performance failure determination process.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Vehicle 5 Engine 17L, 17R Drive shaft 19RL, 19RR Drive wheel 20 Clutch 40 Transmission 43 Gear connection control part 45 Gear stage 50 Clutch control apparatus 60 Control apparatus 70 Drive unit 100 Clutch performance diagnostic apparatus 110 Clutch performance measurement part 120 Judgment part 130 Notification unit 140 Self-diagnosis unit 150 Storage unit

Claims (7)

A clutch performance diagnostic device (100) for diagnosing responsiveness of a clutch actuator (30),
A clutch performance measuring unit (110) for measuring the responsiveness of the clutch actuator (30);
A determination unit (120) for determining performance degradation of the clutch actuator (30) based on a measurement result by the clutch performance measurement unit (110);
With
The clutch performance measurement unit (110) calculates an evaluation index related to the responsiveness of the clutch actuator (30) when the vehicle is traveling or in a travelable state,
The determination unit (120) is a clutch performance diagnosis device that determines whether or not the performance of the clutch actuator (30) is deteriorated based on the evaluation index. When diagnosing clutch disengagement performance,
The clutch performance measuring unit (110), from the clutch engagement to the clutch disengagement, from the measurement start clutch position to the measurement end clutch position in a state in which a driving load is energized with a fixed duty value to the clutch actuator (30). Measuring the response time, and calculating the clutch disengagement response speed as the evaluation index,
The clutch performance diagnosis apparatus according to claim 1, wherein the determination unit (120) determines that the clutch disconnection performance is deteriorated when the clutch disconnection response speed is not within a specified range. When diagnosing clutch engagement performance,
When the clutch performance measuring unit (110) is engaged from the clutch disengagement to the clutch engagement, the clutch actuator (30) is energized with a driving load at a fixed duty value from the measurement start clutch position to the measurement end clutch position. Measuring the response time of the clutch, and calculating the clutch engagement response speed as the evaluation index,
The clutch performance diagnosis device according to claim 1 or 2, wherein the determination unit (120) determines that the clutch engagement performance is deteriorated when the clutch engagement response speed is not within a specified range. When diagnosing clutch engagement performance,
The clutch performance measurement unit (110) counts the number of times that the clutch engagement performance determination clutch position has not been reached within a predetermined time from when the duty value is set to a fixed duty value immediately before the clutch is engaged, As an evaluation index,
The clutch performance diagnosis device according to any one of claims 1 to 3, wherein the determination unit (120) determines that the clutch engagement performance is deteriorated when the unreachable number exceeds a specified number. When diagnosing clutch disengagement retention performance,
The clutch performance measuring unit (110) is a clutch disengagement holding time during which the clutch (20) reaches the clutch disengagement holding performance determination position while the driving of the clutch actuator (30) is stopped after the clutch disengagement operation is completed. Is used as the evaluation index,
The clutch performance diagnosis device according to any one of claims 1 to 4, wherein the determination unit (120) determines that the clutch disengagement retention performance is poor when the clutch disengagement retention time is shorter than a specified time.   In a situation where the clutch performance measurement unit (110) cannot acquire measurement information necessary for determining the performance degradation of the clutch actuator (30) while the vehicle is running or in a travelable state, in a situation where the clutch can be engaged / disengaged. The clutch performance diagnosis apparatus according to any one of claims 1 to 5, further comprising a self-diagnosis unit (140) that performs performance diagnosis of the clutch actuator (30). The clutch performance diagnosis device according to claim 6, wherein the self-diagnosis unit (140) performs a performance diagnosis of the clutch actuator (30) when the vehicle is stopped with a gear set to neutral.

Images