JP6610240B2 - Solenoid valve control device - Google Patents

Description

  The present invention relates to a solenoid valve control device that controls the control states of a plurality of solenoid valves.

  Conventionally, PWM (Pulse Width Modulation) control has been used to control the inductive load of the solenoid valve. When simultaneously controlling a plurality of solenoid valves, there is a moment when a large current flows depending on the state of each PWM signal. Such a large current causes noise and may cause malfunction of other electronic devices. For example, Patent Document 1 discloses a technique for solving such a problem.

  The PWM control device described in Patent Document 1 is configured to control the timing of a PWM signal supplied to a switch element connected to an inductor load according to the number of inductor loads being driven among a plurality of inductor loads. Has been. With such a configuration, by changing the rising timing without changing the DUTY ratio of the PWM signal, a large current is prevented from flowing instantaneously and noise is reduced.

JP 2014-35721 A

  In the technique described in Patent Document 1, only the rising timings of the PWM signals are changed so as to be aligned, and therefore, the falling timings of the PWM signals cannot be aligned. For this reason, it is possible to prevent a large current from flowing instantaneously, but the current value cannot be made constant, and noise may be generated according to a change in the current value.

  Therefore, there is a need for a solenoid valve control device that can reduce the generation of noise even when controlling a plurality of solenoid valves.

  The characteristic configuration of the solenoid valve control device according to the present invention is based on a current instruction value acquisition unit that acquires a current instruction value for a solenoid of each of a plurality of solenoid valves, and the current instruction value for each of the solenoids. An on-duty calculation unit that calculates an on-duty of current when energized by PWM control, and a first allowable range in which a current value of current that is energized for each of the solenoids is set based on the current instruction value Or a determination unit that determines whether the second allowable range wider than the first allowable range is allowed, and the current value is determined based on the determination result of the determination unit. A solenoid that needs to be within the allowable range is set as a priority solenoid, and a solenoid whose current value is allowed to the second allowable range is set as a non-priority solenoid. A solenoid setting unit that sets a solenoid that is paired with the non-priority solenoid among the priority solenoids based on an off-duty for the priority solenoid and an on-duty for the non-priority solenoid; An on-duty update unit for updating on-duty for the non-priority solenoid based on an off-duty for the paired priority solenoid, and an on-duty updated for the non-priority solenoid and an on-duty for the priority solenoid A PWM signal output unit that outputs a PWM signal in synchronization with at least the rising and the other on-duty updated for the non-priority solenoid and the other falling of the on-duty for the priority solenoid. .

  With such a characteristic configuration, at least one of the timing of the on duty for the priority solenoid and the timing of the off duty for the non-priority solenoid, and the timing of the off duty for the priority solenoid and the timing of the on-duty for the non-priority solenoid are made to coincide with each other. Is output, it is possible to reduce a change in current at at least one of the timings. Accordingly, the change in the current consumption of the solenoid valve at the timing of at least one of the timings can be reduced, so that the generation of noise due to the current change can be reduced.

  Further, when the on-duty for the non-priority solenoid is 50% or more, the pair solenoid setting unit sets the paired solenoid from solenoids having an on-duty of 50% or less among the priority solenoids, When the on-duty with respect to the non-priority solenoid is less than 50%, it is preferable to set the paired solenoid from the solenoids with an on-duty of 50% or more among the priority solenoids.

  With such a configuration, when the pair solenoid setting unit sets a priority solenoid that is paired with the non-priority solenoid, a priority solenoid having an off-duty value close to the non-priority solenoid on-duty value is selected. Since the selection is made, it is possible to approach both the on-duty for the priority solenoid and the off-duty for the non-priority solenoid, and the off-duty for the priority solenoid and the on-duty for the non-priority solenoid. Therefore, it is possible to reduce the occurrence of noise due to the current change at each timing.

  The on-duty updating unit uses the on-duty for the non-priority solenoid as it is when the on-duty for the non-priority solenoid is equal to the off-duty for the paired solenoid. If it is different from the off-duty for the paired solenoid, it is preferable to update the on-duty for the non-priority solenoid to be equal to the off-duty for the paired solenoid.

  With such a configuration, the ON duty value for the non-priority solenoid and the OFF duty value for the paired solenoid can be made equal, so the sum of the currents supplied to the nonpriority solenoid and the paired solenoid can be calculated. Can be constant. Therefore, since the change in current can be reduced, the generation of noise can be reduced.

It is a block diagram which shows the structure of a solenoid valve control apparatus. It is a figure which shows the structure of a gear train. It is the figure which showed the engagement table of the clutch of a gear train. It is a figure which shows the relationship between an electric current and the engagement state of a clutch. It is the figure which showed the example of the update of the duty of a non-priority solenoid. It is the figure which showed the example of the update of the duty of a non-priority solenoid. It is the figure which showed the example of the update of the duty of a non-priority solenoid.

  The solenoid valve control device according to the present invention is configured to have a function of suppressing the generation of noise when energizing the solenoid and stopping energization. Hereinafter, the solenoid valve control device 1 of the present embodiment will be described.

  FIG. 1 is a block diagram schematically showing a configuration of a solenoid valve control device 1 according to the present embodiment. As shown in FIG. 1, the solenoid valve control device 1 includes a current instruction value acquisition unit 11, an on-DUTY calculation unit 12, a determination unit 13, a solenoid setting unit 14, an anti-solenoid setting unit 15, an on-DUTY update unit 16, and a PWM. Each functional unit of the signal output unit 17 is configured, and these functional units are constructed by hardware and / or software using a CPU as a core member in order to perform processing related to energization of the solenoid 2.

  Here, FIG. 2 shows an example of an automatic transmission 90 configured to include the solenoid 2 that is a control target of the solenoid valve control device 1. The automatic transmission 90 shown in FIG. 2 includes a torque converter 92 to which power is transmitted from the engine output shaft 91, and a transmission mechanism 93 on the downstream side of the torque converter 92. Engine power is transmitted to the input shaft 94 via the torque converter 92 and transmitted to the output shaft 95 via the speed change mechanism 93. The transmission mechanism 93 includes clutches C1, C2, C3, brakes B1, B2, a one-way clutch F1, and a planetary gear unit 96.

  The torque converter 92 includes a pump impeller 92A connected to the engine output shaft 91, a turbine runner 92B connected to the input shaft 94, and a stator 92C. Further, the torque converter 10 is provided with a lockup clutch 97, and when the lockup clutch 97 is engaged, the rotation of the engine output shaft 91 is directly transmitted to the input shaft 94.

  The clutch C <b> 1 is provided between the input shaft 94 and the forward sun gear 81 of the planetary gear device 96. The clutch C <b> 2 is provided between the input shaft 94 and the rear sun gear 82 of the planetary gear device 96. The clutch C3 is provided between the intermediate shaft 84 to which the carrier 83 is connected and the input shaft 94. The brake B1 is provided between the forward sun gear 81 and the transmission case 98. The brake B2 and the one-way clutch F1 are provided in parallel between the carrier 83 and the transmission case 98.

  Pinion gears 85 and 86 are rotatably supported on the carrier 83. Forward sun gear 81 meshes with pinion gear 85, and rear sun gear 82 meshes with pinion gear 86 via pinion gear 86. Ring gear 87 meshes with pinion gear 85, and output shaft 95 is connected to ring gear 87. The output shaft 95 is connected to driving wheels via a propeller shaft (not shown).

  FIG. 3 is an engagement table showing engagement / disengagement states of the clutches C1, C2, C3, the brakes B1, B2, and the one-way clutch F1 (hereinafter referred to as “clutch group”). As shown in FIG. 3, the automatic transmission 90 shown in FIG. 2 can be changed to four forward speeds and one reverse speed. In FIG. 3, “●” indicates a fully engaged state (“completely engaged state” described later), and “◯” indicates that the engine brake is engaged.

  The engagement / disengagement state of these clutch groups is controlled by hydraulic pressure, and this hydraulic pressure is supplied and shut off by a solenoid valve having a solenoid 2. Therefore, although only one solenoid 2 is shown in FIG. 1, in actuality, energization control of a plurality of solenoids 2 is performed by the solenoid valve control device 1.

  Each of these clutch groups is either in an engaged state in which it is completely engaged, a disengaged state in which it is completely disengaged, or a sliding engagement state in which it is engaged while sliding. . FIG. 4 shows an example of the relationship between the current supplied to the solenoid 2 and the hydraulic pressure supplied via the solenoid valve having the solenoid 2. Such a relationship is defined for each solenoid valve.

  As shown in FIG. 4, the hydraulic pressure supplied is changed according to the current supplied to the solenoid 2 (that is, the opening of the solenoid valve is changed). ”,“ Sliding engagement state ”, or“ completely engaged state ”. In the example of FIG. 4, when the current supplied to the solenoid 2 is less than I1, the state is “completely detached”, and when the current supplied to the solenoid 2 is greater than or equal to I1 and less than I2, the “sliding engagement state”. Thus, when the current supplied to the solenoid 2 is equal to or greater than I2, the “fully engaged state” is established.

  Here, each of the clutch groups is maintained in the “completely disengaged state” even if the current changes if the current is less than I1, and “completely engaged” if the current changes if the current is I2 or more. Is maintained. On the other hand, when the current is greater than or equal to I1 and less than I2, when the current changes, the slipping degree changes even in the “sliding engagement state”. That is, a so-called half-clutch state, a 1/4 clutch, or a 3/4 clutch state is established. For this reason, in the “completely disengaged state” and “completely engaged state”, if the current is a current that can maintain the state, the current can be increased or decreased. It is desirable that the current does not increase or decrease even within the range of I1 or more and less than I2.

  Returning to FIG. 1, the current instruction value acquisition unit 11 acquires a current instruction value for the solenoid 2 included in each of the plurality of solenoid valves. In the present embodiment, the plurality of solenoid valves are solenoid valves that change the engagement / disengagement state of the clutch group of the automatic transmission 90 described above. The solenoid 2 is used to change the open / close state of the solenoid valve. The current instruction value is an instruction value of a current supplied to the solenoid 2 of each solenoid valve of the clutch group in order to change the gear stage state of the automatic transmission 90 transmitted from the host system. The current instruction value acquisition unit 11 acquires a current instruction value for each solenoid 2 and transmits the current instruction value to an on-duty calculation unit 12 and a determination unit 13 described later.

  The on-duty calculation unit 12 calculates the on-duty of the current when energizing by PWM control based on the current instruction value for each solenoid 2. In the present embodiment, the current supplied to the solenoid 2 is supplied by PWM control. Since the PWM control is well known, detailed description thereof is omitted, but the on-duty is calculated by the current value at the time of full DUTY (current value of the output current of the current output unit) and the above-described command current value. The calculation result by the on-duty calculation unit 12 is transmitted to the counter-solenoid setting unit 15 and the on-duty update unit 16 described later.

  Based on the current instruction value, the determination unit 13 needs to keep the current value of the current energized for each solenoid 2 within a preset first allowable range or wider than the first allowable range. It is determined whether the second allowable range is acceptable. As described above, the clutch group is in the “sliding engagement state” when the current supplied to the solenoid 2 is greater than or equal to I1 and less than I2, and the degree of slipping varies depending on the magnitude of the current. For this reason, when the clutch to be controlled in the clutch group is set to the “sliding engagement state”, it is preferable that the current supplied to the solenoid 2 does not vary greatly with respect to the current instruction value.

  On the other hand, the clutch group is “completely disengaged” when the current supplied to the solenoid 2 is less than I1, and is “completely engaged” when it is equal to or greater than I2. For this reason, when the clutch to be controlled in the clutch group is set to the “completely disengaged state”, it may be changed as long as the current supplied to the solenoid 2 is less than I1. In the case of “state”, the current may be changed as long as the current supplied to the solenoid 2 is I2 or more.

  Therefore, when the current instruction value is greater than or equal to I1 and less than I2, the determination unit 13 needs to energize the solenoid 2 to which the current according to the current instruction value is energized so that it falls within the predetermined first allowable range. If the current instruction value is less than I1 or greater than or equal to I2, the solenoid 2 to which the current according to the current instruction value is energized is allowed up to a second tolerance range wider than the first tolerance range. It is determined that The determination result of the determination unit 13 is transmitted to a solenoid setting unit 14 described later. The above-described I1 and I2 are set in advance at predetermined values for each solenoid 2 due to the characteristics of the solenoid 2. Therefore, I1 in each solenoid 2 may be set to the same value, or may be set to different values. Further, I2 in each solenoid 2 may be set to the same value or may be set to different values. In the present embodiment, description will be made assuming that each is set to a different value.

  The solenoid setting unit 14 sets, as a priority solenoid, the solenoid 2 whose current value needs to be within the first allowable range based on the determination result of the determination unit 13, and the solenoid 2 whose current value is allowed to the second allowable range. Is set as a non-priority solenoid. In other words, the solenoid 2 provided in the clutch in the “sliding engagement state” is set as a priority solenoid by the solenoid setting unit 14 and is provided in the clutch in the “completely disengaged state” and “completely engaged state”. Solenoid 2 is set as a non-priority solenoid. Information set by the solenoid setting unit 14 indicating whether each of the solenoids 2 is a priority solenoid or a non-priority solenoid is transmitted to a counter solenoid setting unit 15 described later.

  The anti-solenoid setting unit 15 sets the solenoid 2 that is paired with the non-priority solenoid among the priority solenoids based on the off-duty for the priority solenoid and the on-duty for the non-priority solenoid. “Off duty DUTY with respect to priority solenoid” is a period in which the solenoid 2 provided in the clutch in the “sliding engagement state” is not energized. “On duty for non-priority solenoid” is a period in which the solenoid 2 provided in the clutch that is in the “completely disengaged state” and the “completely engaged state” is energized.

  These on-duty and off-duty are calculated using the calculation result transmitted from the on-duty calculation unit 12. That is, the on-duty described above uses the calculation result transmitted from the on-duty calculation unit 12 as it is, and the off-duty described above is calculated using the calculation result transmitted from the on-duty calculation unit 12. The “solenoid 2 paired with the non-priority solenoid” refers to a pair of solenoids 2 having a correlation with the driving state of the solenoids 2. “There is a correlation” means that the difference between the ON duty for the non-priority solenoid and the OFF duty for the priority solenoid is within a preset range.

  In the present embodiment, when the on-duty with respect to the non-priority solenoid is 50% or more, the counter-solenoid setting unit 15 sets the paired solenoid 2 from the solenoid 2 having the on-duty of 50% or less among the priority solenoids. If the on-duty with respect to the non-priority solenoid is less than 50%, the solenoid 2 that is paired with the solenoid 2 having the on-duty of 50% or more is set.

  “When the on-duty for the non-priority solenoid is 50% or more” means that the period during which the solenoid 2 provided in the clutch in the “completely disengaged state” and the “completely engaged state” is energized is 50 % Or more. Here, in the present embodiment, the solenoid 2 set as a non-priority solenoid sets the clutch to the “fully engaged state” when the on-duty with respect to the solenoid 2 is 50% or more. Therefore, in the present embodiment, “when the on-duty with respect to the non-priority solenoid is 50% or more” means that the period in which the solenoid 2 provided in the clutch that is in the “fully engaged state” is energized is 50. It means the case where it is% or more. In this case, the pair solenoid setting unit 15 sets a pair of solenoids 2 from the solenoids 2 whose ON DUTY is 50% or less among the priority solenoids. That is, among the solenoids 2 provided in the clutch that is in the “sliding engagement state”, the solenoid 2 that is paired with the solenoid 2 having an on-duty of 50% or less is set.

  When there are a plurality of solenoids 2 with an on-duty of 50% or less among the solenoids 2 provided in the clutch in the “sliding engagement state”, the anti-solenoid setting unit 15 sets the “sliding engagement state”. Among the solenoids 2 having an ON DUTY of 50% or less with respect to the solenoid 2 provided in the clutch that is “completely engaged”. good.

  “When the on-duty with respect to the non-priority solenoid is less than 50%” means that the period during which the solenoid 2 provided in the clutch in the “completely disengaged state” and the “completely engaged state” is energized is 50 It means less than%. Here, in the present embodiment, the solenoid 2 set as a non-priority solenoid sets the clutch in the “completely disengaged state” when the ON DUTY for the solenoid 2 is less than 50%. Therefore, in the present embodiment, “when the on-duty with respect to the solenoid 2 set as the non-priority solenoid is 50% or more” means that the solenoid 2 provided in the clutch that is “completely disengaged” is energized. It means a case where the period of state is less than 50%. In this case, the pair solenoid setting unit 15 sets a pair of solenoids 2 from the solenoids 2 with ON DUTY of 50% or more among the priority solenoids. That is, among the solenoids 2 provided in the clutch that is in the “sliding engagement state”, the solenoid 2 that is paired with the solenoid 2 that is ON DUTY of 50% or more is set.

  When there are a plurality of solenoids 2 with an on-duty of 50% or more among the solenoids 2 provided in the clutch in the “sliding engagement state”, the anti-solenoid setting unit 15 sets the “sliding engagement state”. Among solenoids 2 having an on-duty of 50% or more with respect to the solenoid 2 provided in the clutch that is “completely disengaged” is set to a value closest to the on-duty with respect to the solenoid 2 provided in the clutch that is in the “completely disengaged state”. good. The setting result by the solenoid setting unit 15 is transmitted to an on-duty updating unit 16 described later.

  The on-duty update unit 16 updates the on-duty with respect to the non-priority solenoid based on the off-duty with respect to the paired priority solenoid. “On DUTY with respect to non-priority solenoid” is the on DUTY calculated by the on DUTY calculation unit 12. Information indicating the non-priority solenoid and the priority solenoid to be paired is acquired from the setting result transmitted from the pair solenoid setting unit 15. Accordingly, the on-duty update unit 16 updates the on-duty calculated by the on-duty calculation unit 12 for the non-priority solenoid based on the off-duty for the paired priority solenoid.

  In this embodiment, the on-duty update unit 16 uses the on-duty for the non-priority solenoid as it is when the on-duty for the non-priority solenoid is equal to the off-duty for the non-priority solenoid. If it is different from the off-duty for the paired solenoid 2, the on-duty for the non-priority solenoid is updated to be equal to the off-duty for the paired solenoid 2. The on-duty (value) updated by the on-duty updating unit 16 is transmitted to the PWM signal output unit 17 described later.

  The PWM signal output unit 17 generates a PWM signal with the on-duty calculated by the on-duty calculating unit 12 and the on-duty updated when the on-duty updating unit 16 updates the on-duty, and outputs the PWM signal. To do. At this time, the PWM signal output unit 17 generates one rise of the on-duty updated for the non-priority solenoid and one of the on-duty for the priority solenoid, and the other rise of the on-duty updated for the non-priority solenoid and the on-duty for the priority solenoid. The PWM signal is output in synchronization with the fall. That is, the on-duty rise for the non-priority solenoid and the on-duty fall for the priority solenoid are the same timing, and the on-duty fall for the non-priority solenoid and the on-duty rise for the priority solenoid are the same timing. A certain PWM signal is output.

  The PWM signal output from the PWM signal output unit 17 is transmitted to the driver 31. The driver 31 is driven according to the PWM signal, and a current flows through the solenoid 2. Here, the driver 31 has a high-side connection terminal connected to the power supply and a low-side connection terminal grounded.

  A current detection unit 32 is connected to the subsequent stage of the solenoid 2. The current detection unit 32 detects the current flowing through the solenoid 2 and transmits the detection result to the solenoid valve control device 1. The solenoid valve control device 1 performs PWM control based on the detection result of the current detection unit 32 together with the above-described current instruction value.

  Thereby, the on-duty period for the non-priority solenoid is equal to the off-duty period for the priority solenoid, and the off-duty period for the non-priority solenoid and the on-duty period for the priority solenoid can be made equal. Therefore, since the current value energized in the pair of solenoids 2 set as a pair can be made uniform, it is possible to suppress the generation of noise due to the current change.

  Next, an example of a series of processes of the solenoid valve control device 1 will be described with reference to FIG. When the current command value acquisition unit 11 acquires the current command value for the solenoid 2, the on-duty calculation unit 12 calculates on-duty for each solenoid 2 based on the current command value (# 01). In order to facilitate understanding, here, it is assumed that there are three solenoids 2 and are described as solenoid A, solenoid B, and solenoid C, respectively. The current instruction value acquisition unit 11 calculates that the solenoid A on-duty is 45%, the solenoid B on-duty is 40%, and the solenoid C on-duty is 60%.

  The determination unit 13 determines an allowable range set in advance for each of the solenoids A, B, and C, and the solenoid setting unit 14 determines the priority solenoid for each of the solenoids A, B, and C based on the determination result of the determination unit 13. Alternatively, a non-priority solenoid is set (# 02). In the example of FIG. 5, the solenoid A is set as a priority solenoid, the solenoid C is set as a non-priority solenoid, and the solenoid C is set as a priority solenoid.

  A priority solenoid that is paired with solenoid B set as a non-priority solenoid by the solenoid setting unit 15 is set (# 02). Since the on-duty of the solenoid B set as a non-priority solenoid is less than 50%, the solenoid setting unit 15 has a solenoid C whose on-duty is 50% or more among the solenoids A and C set as the priority solenoids. Is set as a solenoid (pair solenoid) that is paired with solenoid B.

  The on-DUTY update unit 16 calculates the off-duty of the solenoid C (# 03). In the example of FIG. 5, the off-duty of the solenoid C is calculated as 40%. The on-duty updating unit 16 uses the on-duty of the solenoid B set as a non-priority solenoid as it is because the on-duty of the solenoid B is equal to the off-duty of the solenoid C (# 04).

  The PWM signal output unit 17 has the same timing as the fall of the on-duty of the solenoid B and the rise of the on-duty of the solenoid C, and the same timing as the rise of the on-duty of the solenoid B and the on-duty of the solenoid C. The PWM signal is output so that (# 05). By performing the processing in this way, the sum of the currents supplied to the solenoid B and the solenoid C can always be made constant. Therefore, it is possible to suppress the occurrence of noise due to the current change.

  Next, another example of a series of processes of the solenoid valve control apparatus 1 will be described with reference to FIG. When the current command value acquisition unit 11 acquires the current command value for the solenoid 2, the on-duty calculation unit 12 calculates on-duty for each solenoid 2 based on the current command value (# 11). In order to facilitate understanding, the description will be given here assuming that there are three solenoids 2, that is, solenoid A, solenoid B, and solenoid C, respectively. The current instruction value acquisition unit 11 calculates that the solenoid A on-duty is 45%, the solenoid B on-duty is 40%, and the solenoid C on-duty is 70%.

  The determination unit 13 determines an allowable range set in advance for each of the solenoids A, B, and C, and the solenoid setting unit 14 determines the priority solenoid for each of the solenoids A, B, and C based on the determination result of the determination unit 13. Alternatively, a non-priority solenoid is set (# 12). In the example of FIG. 5, the solenoid A is set as a priority solenoid, the solenoid B is set as a non-priority solenoid, and the solenoid C is set as a priority solenoid.

  A priority solenoid that is paired with solenoid B set as a non-priority solenoid by the solenoid setting unit 15 is set (# 12). Since the on-duty of the solenoid B set as a non-priority solenoid is less than 50%, the solenoid setting unit 15 has a solenoid C whose on-duty is 50% or more among the solenoids A and C set as the priority solenoids. Is set as a solenoid (pair solenoid) that is paired with solenoid B.

  The on-DUTY update unit 16 calculates the off-duty of the solenoid C (# 13). In the example of FIG. 6, the solenoid DUTY is calculated as 30%. Since the ON duty of solenoid B is different from the OFF duty of solenoid C, on-duty update unit 16 makes on-duty of solenoid B set as a non-priority solenoid equal to off-duty of paired solenoid C. (Reduced) (# 14).

  The PWM signal output unit 17 has the same timing as the fall of the on-duty of the solenoid B and the rise of the on-duty of the solenoid C, and the same timing as the rise of the on-duty of the solenoid B and the on-duty of the solenoid C. The PWM signal is output so that (# 15). By performing the processing in this way, the sum of the currents supplied to the solenoid B and the solenoid C can always be made constant. Therefore, it is possible to suppress the occurrence of noise due to the current change.

  Furthermore, another example of a series of processes of the solenoid valve control device 1 will be described with reference to FIG. When the current command value acquisition unit 11 acquires the current command value for the solenoid 2, the on-duty calculation unit 12 calculates on-duty for each solenoid 2 based on the current command value (# 21). In this example, in order to facilitate understanding, it is assumed that there are three solenoids, solenoid A, solenoid B, and solenoid C, respectively. The current instruction value acquisition unit 11 calculates that the solenoid A on DUTY is 30%, the solenoid B on DUTY is 60%, and the solenoid C on DUTY is 70%.

  The determination unit 13 determines an allowable range set in advance for each of the solenoids A, B, and C, and the solenoid setting unit 14 determines the priority solenoid for each of the solenoids A, B, and C based on the determination result of the determination unit 13. Alternatively, a non-priority solenoid is set (# 22). In the example of FIG. 7, solenoid A is set as a priority solenoid, solenoid B is set as a non-priority solenoid, and solenoid C is set as a priority solenoid.

  A priority solenoid that is paired with solenoid B set as a non-priority solenoid by the solenoid setting unit 15 is set (# 22). Since the on-duty of the solenoid B set as the non-priority solenoid is 50% or more, the solenoid setting unit 15 is the solenoid A whose on-duty is 50% or less among the solenoids A and C set as the priority solenoids. Is set as a solenoid (pair solenoid) that is paired with solenoid B.

  The on-DUTY update unit 16 calculates the off-duty of the solenoid A (# 23). In the example of FIG. 7, the off-duty of the solenoid C is calculated as 30%. Since the ON duty of solenoid A and the duty DUTY of solenoid B are different, the ON duty of the solenoid B that is set as a non-priority solenoid becomes equal to the duty DUTY of the paired solenoid A. Is updated (increased) (# 24).

  The PWM signal output unit 17 has the same timing for the rise of solenoid A on DUTY and the fall of solenoid B on DUTY, and the same timing for the fall of solenoid A on DUTY and the rise of solenoid B on DUTY. The PWM signal is output so that (# 25). By performing the processing in this way, the sum of the currents supplied to the solenoid A and the solenoid B can always be made constant. Therefore, it is possible to suppress the occurrence of noise due to the current change.

[Other Embodiments]
In the above embodiment, the PWM signal output unit 17 has the same timing as the rise of the on-duty with respect to the non-priority solenoid and the fall of the on-duty with respect to the priority solenoid, and the fall of the on-duty with respect to the non-priority solenoid and the priority solenoid. The PWM signal output unit 17 has been described as outputting a PWM signal having the same timing as the rise of the on-duty with respect to the non-priority solenoid, and the timing of the rise of the on-duty relative to the non-priority solenoid and the fall of the on-duty with respect to the priority solenoid It is also possible to output the PWM signal so that one of the falling timing of the on-duty for the non-priority solenoid and the rising timing of the on-duty for the priority solenoid is the same timing. .

  In the above embodiment, when the on-duty with respect to the non-priority solenoid is 50% or more, the pair solenoid setting unit 15 sets a pair of solenoids from the solenoids with the on-duty of 50% or less among the priority solenoids. In the case where the on-duty with respect to the non-priority solenoid is less than 50%, among the priority solenoids, the solenoid having the on-duty of 50% or more is described as being set as a paired solenoid. When the on-duty with respect to the priority solenoid is 50% or more, it is possible to set a pair of solenoids from the solenoids with the on-duty of 50% or more among the priority solenoids, and the on-duty with respect to the non-priority solenoid is 50 % Of the priority solenoids, the duty cycle is ON. It is also possible to set the solenoid to be paired solenoid below 0%.

  In the above embodiment, the on-duty update unit 16 uses the on-duty for the non-priority solenoid as it is when the on-duty for the non-priority solenoid is equal to the off-duty for the non-priority solenoid. In the above description, the on-duty for the non-priority solenoid is updated to be equal to the off-duty for the non-priority solenoid when it is different from the off-duty for the non-priority solenoid. Even when the DUTY is equal to the off-duty for the paired solenoid, the on-duty for the non-priority solenoid can be configured to increase or decrease, and the on-duty for the non-priority solenoid can be configured for the paired solenoid. If different from the off-DUTY may also be configured to update to fit within a preset tolerance against off DUTY for the solenoid to be paired on-DUTY for the non-priority solenoid.

  In the above embodiment, the solenoid valve control device 1 has been described with reference to the example of controlling the solenoid 2 of the solenoid valve that controls the clutch. However, the solenoid valve control device 1 may be configured to control the solenoid valve of another device. Is possible.

  The present invention can be used in a solenoid valve control device that controls the control states of a plurality of solenoid valves.

1: Solenoid valve control device 2: Solenoid 11: Current instruction value acquisition unit 12: On-duty calculation unit 13: Determination unit 14: Solenoid setting unit 15: Counter-solenoid setting unit 16: On-duty update unit

Claims (3)

A current instruction value acquisition unit for acquiring a current instruction value for a solenoid of each of the plurality of solenoid valves;
An on-duty calculation unit for calculating an on-duty of a current when energized by PWM control based on the current instruction value for each of the solenoids;
Based on the current instruction value, the current value of the current that is energized for each solenoid needs to be within a preset first tolerance range, or a second tolerance that is wider than the first tolerance range. A determination unit for determining whether the range is allowed;
Based on the determination result of the determination unit, a solenoid that needs to keep the current value within the first allowable range is set as a priority solenoid, and a solenoid that allows the current value to be within the second allowable range is a non-priority solenoid. Solenoid setting part to be set as
A solenoid setting unit for setting a solenoid that is paired with the non-priority solenoid among the priority solenoids based on the off-duty for the priority solenoid and the on-duty for the non-priority solenoid;
An on-duty update unit for updating on-duty for the non-priority solenoid based on off-duty for the paired priority solenoid;
Synchronize at least one rising edge of the updated on-duty with respect to the non-priority solenoid and one of the on-duty with respect to the priority solenoid and the other falling edge of the updated on-duty with respect to the non-priority solenoid and the on-duty with respect to the priority solenoid. A PWM signal output unit that outputs a PWM signal,
A solenoid valve control device comprising:   When the on-duty with respect to the non-priority solenoid is 50% or more, the pair-solenoid setting unit sets the paired solenoid from the solenoids with the on-duty of 50% or less among the priority solenoids. 2. The solenoid valve control device according to claim 1, wherein, when the on-duty with respect to the priority solenoid is less than 50%, the solenoid that controls the pair is set from the solenoids with the on-duty of 50% or more among the priority solenoids.   The on-duty updating unit uses the on-duty for the non-priority solenoid as it is when the on-duty for the non-priority solenoid is equal to the off-duty for the non-priority solenoid. 3. The solenoid valve control device according to claim 2, wherein when the duty is different from the off-duty for the solenoid, the on-duty for the non-priority solenoid is updated to be equal to the off-duty for the paired solenoid.

Images