JP2018123729A - Oil supply device - Google Patents

Abstract

An oil supply device that can reduce an undershoot amount when an operation amount of an actuator is changed to reduce a discharge pressure sensor value toward a target discharge pressure. An oil supply apparatus 210 includes a feedback control unit 303 that obtains an instruction target discharge pressure using a proportional term and an integral term of feedback control using a target discharge pressure and a discharge pressure sensor value, and an instruction target. A discharge pressure control unit 304 that inputs an instruction current value corresponding to the discharge pressure to the actuator 100A. The feedback control unit 303 performs a replacement process to make the integral term equal to a specified value that is a positive value on condition that the amount of decrease in target discharge pressure per unit time is equal to or greater than the discharge pressure decrease amount determination value. An instruction target discharge pressure calculated by adding the term and the processed integral term to the target discharge pressure is obtained. [Selection] Figure 1

Description

  The present invention relates to an oil supply device.

  The engine is provided with an oil supply device for supplying oil to a plurality of oil demanding sections that require oil supply. Such an oil supply device includes an oil pump, an electric actuator, and a sensor that detects the pressure of oil discharged from the oil pump. When the operation amount of the actuator is changed, the oil supply in the oil pump is changed. The discharge pressure is changed.

  In such an oil supply device, a target discharge pressure is derived so that a sufficient amount of oil can be supplied to each oil demand section, and the discharge pressure sensor value that is the pressure of the oil detected by the sensor and the target discharge pressure. The amount of operation of the actuator is derived by feedback control using. For example, as described in Patent Document 1, a proportional term, an integral term, and a differential term for feedback control are calculated based on a target discharge pressure and a discharge pressure sensor value. The instruction target discharge pressure is calculated based on the sum of the proportional term, the integral term, and the derivative term added to the target discharge pressure, and the operation amount corresponding to the instruction target discharge pressure is derived, and the operation amount With this, the actuator is activated.

Japanese Patent Application Laid-Open No. 2014-159761

  By the way, when the target discharge pressure becomes smaller than the discharge pressure sensor value due to the change of the target discharge pressure, the operation amount of the actuator is changed so that the discharge pressure sensor value becomes small following the decrease of the target discharge pressure. It becomes. At this time, if the amount of decrease in the target discharge pressure is large, an undershoot occurs in which the discharge pressure sensor value temporarily falls below the target discharge pressure. When undershoot occurs in this way, if the amount of undershoot, which is the difference between the target discharge pressure and the discharge pressure sensor value, is large, the amount of oil supplied to the oil demand department will fall below the demand of the oil demand department. May end up.

  An object of the present invention is to provide an oil supply device capable of reducing an undershoot amount when an operation amount of an actuator is changed to reduce a discharge pressure sensor value toward a target discharge pressure.

  An oil supply apparatus for solving the above problems includes an oil pump, an actuator, and a sensor that detects a pressure of oil discharged from the oil pump. When the operation amount of the actuator is changed, The oil discharge pressure changes. This oil supply device calculates a proportional term and an integral term of feedback control using a target discharge pressure, which is a target value of the discharge pressure for the oil pump, and a discharge pressure sensor value, which is the oil pressure detected by the sensor. A feedback control unit that obtains a target discharge pressure for instruction calculated by adding to the target discharge pressure, and an actuator that is operated based on an operation amount corresponding to the calculated target discharge pressure for instruction. A discharge pressure control unit that controls the discharge pressure. Then, the feedback control unit replaces the integral term of the feedback control with a specified value that is a positive value on condition that the amount of decrease in target discharge pressure per unit time is equal to or greater than the discharge pressure decrease amount determination value. The instruction target discharge pressure calculated by adding the proportional term of feedback control and the integral term after processing to the target discharge pressure is obtained.

  When the discharge pressure sensor value is decreased toward the target discharge pressure because the target discharge pressure is smaller than the discharge pressure sensor value, the difference obtained by subtracting the discharge pressure sensor value from the target discharge pressure becomes a negative value. Therefore, the proportional term becomes a negative value. Further, when the amount of decrease in the target discharge pressure per unit time is equal to or greater than the discharge pressure decrease amount determination value, the integral term is greatly reduced and the integral term is also a negative value. When the integral term becomes a negative value in this way, when the actuator is operated with the operation amount corresponding to the target discharge pressure for instruction calculated using the integral term, the change amount of the operation amount becomes high, that is, The decrease rate of the discharge pressure sensor value tends to increase. Since the influence of the integral term continues, the state in which the discharge pressure sensor value decreases rapidly continues and the amount of undershoot tends to increase.

  Therefore, in the above configuration, when the amount of decrease in the target discharge pressure per unit time is equal to or greater than the discharge pressure decrease amount determination value, a replacement process is performed to make the integral term of the feedback control equal to a specified value that is a positive value. The instruction target discharge pressure is calculated using the processed integral term. Therefore, the instruction target discharge pressure can be increased as compared with the case of using the integral term when the replacement process is not performed. As a result, the difference between the target discharge pressure for indication and the discharge pressure sensor value when the amount of decrease in target discharge pressure per unit time is equal to or greater than the discharge pressure decrease amount determination value is compared with the case where no replacement process is performed. And get smaller. Then, by operating the actuator with the operation amount corresponding to the instruction target discharge pressure, the difference between the instruction target discharge pressure and the discharge pressure sensor value is less likely to be large, so that the instruction target discharge pressure is supported. The change rate of the operation amount can be lowered. As a result, the rate of decrease in the discharge pressure sensor value is unlikely to increase, and as a result, the occurrence of undershoot is suppressed. Therefore, the amount of undershoot when the actuator is operated to decrease the discharge pressure sensor value toward the target discharge pressure can be reduced.

  An engine-driven oil pump that is driven in synchronism with the rotation of the crankshaft of the engine may be employed as the oil pump. In this case, the discharge pressure sensor value decreases when the engine speed decreases in a situation where the target discharge pressure has not changed. Then, the discharge pressure sensor value is increased to the target discharge pressure by the operation of the actuator. At this time, if the state where the discharge pressure sensor value is lower than the target discharge pressure continues for a long time, there is a risk that the amount of oil in the oil demand section of the engine will be insufficient.

  Therefore, the feedback control unit performs processing that does not set the integral term of the feedback control to a negative value on the condition that the amount of decrease in the engine speed per unit time is equal to or greater than the rotational speed decrease determination value. The target discharge pressure for instruction calculated by adding the proportional term and the integral term after the processing to the target discharge pressure may be obtained. If the integral term becomes a negative value when the discharge pressure sensor value is lower than the target discharge pressure, the increase rate of the discharge pressure sensor value is difficult to increase, and the discharge pressure sensor value falls below the target discharge pressure. Will continue for a long time. In this regard, according to the above configuration, when the amount of decrease in the engine rotational speed per unit time is equal to or greater than the rotational speed decrease determination value, the integral term is a value equal to or greater than “0”. Deviation from sensor value is unlikely to be small. That is, the increase rate of the discharge pressure sensor value is unlikely to decrease. As a result, the state where the discharge pressure sensor value is lower than the target discharge pressure is difficult to continue for a long time.

  When the discharge pressure sensor value is decreased because the target discharge pressure has decreased, the absolute value of the proportional term of the feedback control tends to increase as the amount of decrease in the target discharge pressure per unit time increases. That is, the decrease rate of the discharge pressure sensor value tends to increase. Therefore, it is preferable that the oil supply device includes a specified value setting unit that increases the specified value as the amount of decrease in the target discharge pressure per unit time increases.

  According to the above configuration, the integral term can be increased by the replacement process as the amount of decrease in the target discharge pressure per unit time is larger. By calculating the target discharge pressure for indication using such an integral term, even if the absolute value of the proportional term increases because the amount of decrease in target discharge pressure per unit time is large, the discharge pressure sensor value decreases. The speed is difficult to increase. As a result, it is possible to suppress an increase in the amount of undershoot.

  The feedback control unit uses the integral term that has not been subjected to the replacement process after the actuator is operated with the operation amount corresponding to the target discharge pressure for instruction calculated using the integral term derived by the replacement process. It is preferable to calculate the target discharge pressure. Thereby, compared with the case where the integral term derived | led-out by the substitution process continues being used, it can suppress that the decreasing rate of a discharge pressure sensor value becomes low too much.

  Also, when the target discharge pressure is reduced, but the reduction amount per unit time is not so large, the actuator is operated with the operation amount corresponding to the target discharge pressure for indication calculated using the integral term derived by the replacement process. In this case, the decrease rate of the discharge pressure sensor value becomes too low, and the time required for the discharge pressure sensor value to converge to the target discharge pressure becomes too long. Therefore, when the discharge pressure decrease amount determination value is the first discharge pressure decrease amount determination value, the feedback control unit determines that the decrease amount per unit time of the target discharge pressure is the first discharge pressure decrease amount determination value. Other than making the integral term of the feedback control equal to “0” on condition that it is less than or equal to or greater than the second discharge pressure decrease amount determination value smaller than the first discharge pressure decrease amount determination value. The instruction target discharge pressure calculated by adding the proportional term of the feedback control and the integral term after the process to the target discharge pressure may be obtained.

  According to the above configuration, when the amount of decrease in the target discharge pressure per unit time is less than the first discharge pressure decrease amount determination value and greater than or equal to the second discharge pressure decrease amount determination value, The instruction target discharge pressure is calculated using the integral term derived by the replacement process. The integral term derived by the other replacement process is smaller than the integral term derived by the replacement process. Therefore, the difference between the instruction target discharge pressure and the discharge pressure sensor value is larger than that in the case where the instruction target discharge pressure is calculated using the integral term derived by the replacement process. Then, by operating the actuator with the operation amount corresponding to the instruction target discharge pressure, the actuator is operated with the operation amount corresponding to the instruction target discharge pressure calculated using the integral term derived by the replacement process. Compared with the case of making it, the decreasing speed of a discharge pressure sensor value can be made high. As a result, it is possible to suppress an increase in the time required for the discharge pressure sensor value to converge to the target discharge pressure.

The schematic diagram which shows the outline of the oil circulation path | route in the oil supply apparatus of embodiment, and an engine provided with the oil supply apparatus. It is sectional drawing which shows the oil pump in the oil supply apparatus, Comprising: The figure which shows the state in which the discharge pressure of oil is the maximum. It is sectional drawing which shows the oil pump, Comprising: The figure which shows the state in which the discharge pressure of oil is the minimum. The map which shows the relationship between the fall amount per unit time of a target discharge pressure, and a regulation value in the oil supply apparatus. The map which shows the relationship between the instruction | command target discharge pressure and instruction | command electric current value in the oil supply apparatus. The flowchart explaining the processing routine which the feedback control part in the control apparatus of the oil supply apparatus performs in order to calculate the target discharge pressure for instruction | indication. 9 is a timing chart showing a transition of a discharge pressure sensor value when an instruction current value corresponding to an instruction target discharge pressure calculated by a second instruction value calculation process is input to an actuator. 9 is a timing chart showing a transition of a discharge pressure sensor value when an instruction current value corresponding to an instruction target discharge pressure calculated by a third instruction value calculation process is input to an actuator.

Hereinafter, an embodiment of an oil supply device will be described with reference to FIGS.
FIG. 1 illustrates an oil circulation path in an engine 200 including the oil supply device 210 of the present embodiment. As shown in FIG. 1, the engine 200 includes an oil pan 201 that stores oil, and a main oil gallery 202 to which oil in the oil pan 201 is supplied via an oil supply device 210. The engine 200 is provided with a plurality of devices 203 that require oil supply. Each of these devices 203 is an example of an oil demand section that is a part that requires oil supply. Then, the oil discharged from the device 203 returns to the oil pan 201.

  The oil supply device 210 includes an oil pump 10 that can change the oil discharge pressure and an oil control valve 100. The control device 300 controls the drive of the oil control valve 100 so that the oil discharge pressure in the oil pump 10 is changed.

Next, the oil pump 10 will be described with reference to FIGS. 1, 2, and 3.
The oil pump 10 is a variable displacement pump that is driven based on the rotation of the crankshaft of the engine 200. As shown in FIGS. 2 and 3, the oil pump 10 includes an input shaft 11 that rotates in synchronization with the crankshaft, and a casing member CS in which a housing space 40 is partitioned. The housing space 40 is provided with an inner rotor 50 that rotates integrally with the input shaft 11, an outer rotor 60 that is disposed on the outer peripheral side of the inner rotor 50, and a ring-shaped adjustment ring 70 that surrounds the outer rotor 60.

  The casing member CS is provided with a suction port 12 for sucking oil therein and a discharge port 13 for discharging the oil inside the casing member CS. As shown in FIG. 1, the suction port 12 communicates with a suction oil passage 114 that communicates with the oil pan 201, and the discharge port 13 communicates with a main oil gallery 202 as shown in FIGS. Communicating with

  As shown in FIGS. 2 and 3, a plurality of external teeth 51 are provided on the outer periphery of the inner rotor 50, and a plurality of internal teeth 61 that mesh with the outer teeth 51 of the inner rotor 50 are provided on the inner periphery of the outer rotor 60. It has been. The number of inner teeth 61 is one more than the number of outer teeth 51. The outer rotor 60 is rotatably held by the adjustment ring 70.

  The rotation center of the outer rotor 60 is eccentric with respect to the rotation center of the inner rotor 50. The outer teeth 51 of the inner rotor 50 and the inner teeth 61 of the outer rotor 60 are in a state in which a part thereof (the right side portion in FIG. 2) is engaged with each other. A working chamber 41 filled with oil is formed between the outer periphery of the inner rotor 50 and the inner periphery of the outer rotor 60.

  In the working chamber 41, in a portion from a position where the outer teeth 51 of the inner rotor 50 and the inner teeth 61 of the outer rotor 60 are engaged with each other to a predetermined position in the rotation direction of the input shaft 11 indicated by an arrow in FIG. The clearance between the outer teeth 51 of the inner rotor 50 and the inner teeth 61 of the outer rotor 60 gradually increases with the rotation. The portion where the gap between the outer teeth 51 of the inner rotor 50 and the inner teeth 61 of the outer rotor 60 gradually increases in this way communicates with the suction port 12. On the other hand, in the working chamber 41, a portion where the gap between the outer teeth 51 of the inner rotor 50 and the inner teeth 61 of the outer rotor 60 gradually decreases as the rotors 50 and 60 rotate is in communication with the discharge port 13.

  When the oil pump 10 is driven, the input shaft 11 rotates to rotate the rotors 50 and 60 while meshing with each other. Then, the oil stored in the oil pan 201 is sucked into the working chamber 41 from the suction port 12 through the suction oil passage 114 and discharged from the discharge port 13 to the discharge oil passage 13a.

  The adjustment ring 70 includes a ring-shaped main body 71 that holds the outer rotor 60, and a protrusion 72 that protrudes from the outer periphery of the main body 71 in the radial direction of the rotors 50 and 60. The main body 71 of the adjustment ring 70 is provided with elongated holes 711 and 712 extending in the specified direction. Guide pins 81 and 82 fixed to the casing member CS are inserted through the long holes 711 and 712. Thereby, the adjustment ring 70 can be displaced in the extending direction of the long holes 711 and 712.

  A first seal member 83 is provided at the tip of the protrusion 72 of the adjustment ring 70, and a second seal member 84 is provided in the main body 71. The seal members 83 and 84 abut against the side wall of the casing member CS, and the space between the side wall and the outer periphery of the adjustment ring 70 is sealed, whereby the adjustment ring 70 and the seal members 83, A control oil chamber 42 is defined by 84.

  The control oil chamber 42 is provided with an opening 14 communicating with the control oil passage 111, and oil can be supplied from the oil control valve 100 to the control oil chamber 42 through the control oil passage 111 and the opening 14. Yes. In addition, the accommodation space 40 is provided with a spring 15 that applies an urging force to the projecting portion 72 in a direction to reduce the volume of the control oil chamber 42. The spring 15 is disposed on the opposite side of the control oil chamber 42 with the protrusion 72 interposed therebetween. FIG. 2 shows a state where the adjustment ring 70 is held at a position where the volume of the control oil chamber 42 is minimized by the biasing force from the spring 15 because the internal pressure of the control oil chamber 42 is low. In the present embodiment, the position of the adjustment ring 70 when the volume of the control oil chamber 42 is minimized, that is, the position of the adjustment ring 70 in FIG. 2 is referred to as an “initial position”.

  When the adjustment ring 70 is disposed at the initial position, when oil is supplied to the control oil chamber 42 and the internal pressure of the control oil chamber 42 increases, the control oil chamber resists the urging force from the spring 15. The adjustment ring 70 is displaced from the initial position in the direction of increasing the volume of 42. That is, the adjustment ring 70 is displaced while rotating in the direction from the state shown in FIG. 2 toward the state shown in FIG. 3 (counterclockwise direction in FIG. 2). On the other hand, when the oil is discharged from the control oil chamber 42 by driving the oil control valve 100, the internal pressure of the control oil chamber 42 is lowered, and the volume of the control oil chamber 42 is reduced by the urging force from the spring 15. The adjustment ring 70 is displaced in the direction. That is, the adjustment ring 70 is displaced while rotating in the direction (clockwise direction in FIG. 3) from the state shown in FIG. 3 toward the state shown in FIG. That is, the position of the adjustment ring 70 is determined by the internal pressure of the control oil chamber 42 and the urging force from the spring 15. As the position of the adjustment ring 70 changes, the relative positions of the meshed portions of the teeth 51 and 61 of the inner rotor 50 and the outer rotor 60 with respect to the openings of the suction port 12 and the discharge port 13 change. For this reason, the discharge pressure which is the pressure of the oil discharged from the discharge port 13 is changed through the change of the position of the adjustment ring 70 by adjusting the internal pressure of the control oil chamber 42.

  Specifically, in the oil pump 10, when the position of the adjustment ring 70 is in the “initial position” as shown in FIG. 2, the oil discharge pressure becomes maximum. As shown in FIG. 2, when the internal pressure of the control oil chamber 42 increases from a state where the oil discharge pressure is at the maximum, the adjustment ring 70 resists the urging force from the spring 15 as the internal pressure increases. It is displaced while rotating counterclockwise in FIG. As a result, in the portion where the gap between the external teeth 51 and the internal teeth 61 gradually increases with the rotation of the rotors 50 and 60, the range overlapping the suction port 12 becomes small, and the external teeth 51 and the internal teeth A part of the portion where the gap with 61 gradually decreases overlaps with the suction port 12. As a result, the oil discharge pressure is lowered. On the contrary, when the internal pressure of the control oil chamber 42 becomes low, the adjustment ring 70 is displaced while being rotated in the clockwise direction in FIG. Get higher.

Next, the oil control valve 100 will be described with reference to FIGS. 1, 2, and 3.
As shown in FIGS. 1 and 2, the oil control valve 100 can switch the communication state of a plurality of oil paths by switching the position of the spool by driving an electromagnetically driven actuator 100A. That is, the oil control valve 100 discharges oil from the control port 101 to which the control oil passage 111 is connected, the supply port 102 to which the supply oil passage 112 branched from the discharge oil passage 13a of the oil pump 10 is connected, and oil. And a discharge port 103 to which the discharge oil passage 113 is connected. Then, by changing the position of the spool by adjusting the instruction current value Iocv for the actuator 100A, the position of the spool discharges the oil returned to the control port 101 from the discharge port 103 (FIG. 2), The oil is supplied to the supply port 102 and switched to a supply position (FIG. 3) for sending the oil from the control port 101 to the control oil passage 111. In other words, in the present embodiment, the spool is displaced from the position shown in FIG. 2 toward the position shown in FIG. 3 as the operation amount of the actuator 100A, that is, the command current value Iocv input to the actuator 100A increases. . The internal pressure of the control oil chamber 42 of the oil pump 10 can be increased by displacing the spool from the position shown in FIG. 2 toward the position shown in FIG. 3, that is, the oil discharge pressure in the oil pump 10. Can be lowered.

Next, the control device 300 of the oil supply device 210 will be described with reference to FIGS. 1 and 4.
As shown in FIG. 1, a discharge pressure sensor 311, a temperature sensor 312, and a crank angle sensor 313 are electrically connected to the control device 300. The discharge pressure sensor 311 detects a discharge pressure sensor value PS that is the pressure of oil discharged from the oil pump 10, and the temperature sensor 312 detects an oil temperature TMP that is the temperature of oil supplied to the oil pump 10. The crank angle sensor 313 detects an engine rotation speed NE that is the rotation speed of the crankshaft. The control device 300 controls the operation of the oil supply device 210 based on information detected by the sensors 311 to 313.

  In addition, the control device 300 includes a target setting unit 301, a specified value setting unit 302, a feedback control unit 303, and a discharge pressure control unit 304 as functional units for controlling the oil discharge pressure in the oil pump 10. .

  The target setting unit 301 sets a target discharge pressure PTr for the oil pump 10. Specifically, the target setting unit 301 individually derives the required hydraulic pressure in each of the devices 203, and among the required hydraulic pressures, the target hydraulic pressure PTr is set to the highest required hydraulic pressure or a slightly higher hydraulic pressure than the highest required hydraulic pressure. And Further, the target setting unit 301 holds the target discharge pressure PTr at a predetermined value when the engine rotational speed NE is a value within a predetermined speed region A set in advance. Then, the target setting unit 301 outputs the set target discharge pressure PTr to the specified value setting unit 302 and the feedback control unit 303.

  The specified value setting unit 302 sets the specified value F according to the decrease amount DPTr per unit time of the target discharge pressure PTr. Specifically, as shown in FIG. 4, the specified value setting unit 302 equals the minimum value Fmin greater than “0” when the decrease amount DPTr is less than the first discharge pressure decrease amount determination value DPTrTh1. . That is, even when the target discharge pressure PTr is not lowered, the specified value F is made equal to the minimum value Fmin. Further, when the decrease amount DPTr is equal to or greater than the first discharge pressure decrease amount determination value DPTrTh1, the specified value setting unit 302 increases the specified value F as the decrease amount DPTr increases. Therefore, the specified value F is always a positive value. Then, the specified value setting unit 302 outputs the derived specified value F to the feedback control unit 303.

  As illustrated in FIG. 1, the feedback control unit 303 performs a first instruction value calculation process, a second instruction value calculation process, and a third instruction value calculation process as processes for calculating the instruction target discharge pressure PTrA. Can be implemented. The contents of each calculation process will be described later. That is, the feedback control unit 303 uses different calculation processes depending on the situation. Then, the feedback control unit 303 outputs the target discharge pressure PTrA calculated by these calculation processes to the discharge pressure control unit 304.

  The discharge pressure control unit 304 calculates an instruction current value Iocv corresponding to the instruction target discharge pressure PTrA input from the feedback control unit 303. The command current value Iocv is an example of the operation amount of the actuator 100A. In the present embodiment, as shown in FIG. 5, the command current value Iocv increases as the command target discharge pressure PTrA decreases. The discharge pressure control unit 304 then controls the operation of the actuator 100A by inputting the calculated command current value Iocv to the actuator 100A, that is, controls the oil discharge pressure in the oil pump 10.

  Next, a processing routine executed by the feedback control unit 303 to calculate the instruction target discharge pressure PTrA will be described with reference to FIG. This processing routine is executed every preset control cycle.

  As shown in FIG. 6, in this processing routine, the feedback control unit 303 determines whether or not the steady state is reached (step S11). The steady state is a state in which the discharge pressure sensor value PS has converged on the target discharge pressure PTr, and a state in which the discharge pressure sensor value PS has not converged on the target discharge pressure PTr is referred to as an unsteady state. If it is in a steady state (step S11: YES), the feedback control unit 303 turns off a correction flag FLG described later (step S12), and performs a first instruction value calculation process (step S13). That is, the feedback control unit 303 calculates a proportional term X and an integral term Y of feedback control using the target discharge pressure PTr and the discharge pressure sensor value PS. Then, the feedback control unit 303 obtains the instruction target discharge pressure PTrA calculated by adding the calculated proportional term X and integral term Y to the target discharge pressure PTr. Specifically, the feedback control unit 303 calculates the instruction target discharge pressure PTrA by substituting the target discharge pressure PTr, the proportional term X, and the integral term Y into the following relational expression (Formula 1). Note that “G” in the relational expression (Expression 1) is a common gain, and the gain G is a value corresponding to the temperature of the oil supplied to the oil pump 10, that is, the oil temperature TMP detected by the temperature sensor 312. Set to

PTrA = (PTr + X + Y) × G (Formula 1)
When the instruction target discharge pressure PTrA is calculated in the first instruction value calculation process, the feedback control unit 303 proceeds to step S21 described later.

  On the other hand, in step S11, when it is not a steady state (NO), the feedback control unit 303 determines whether or not the correction flag FLG is set to OFF (step S14). When the correction flag FLG is set to ON (step S14: NO), the feedback control unit 303 shifts the process to step S13 described above. On the other hand, when the correction flag FLG is set to OFF (step S14: YES), the feedback control unit 303 indicates that the engine speed NE has changed within the predetermined speed region A and the unit of the engine speed NE. It is determined whether or not both the decrease amount DNE per time is equal to or greater than the rotational speed decrease amount determination value DNETh (step S15). The “unit time” here is equal to the length of one period of the control cycle.

The engine speed NE at the previous execution of this processing routine is a value within the predetermined speed region A, and the engine speed NE at the current execution of this processing routine, that is, the current engine speed NE is the predetermined speed. When the value is within the region A, it can be determined that the engine rotational speed NE is changing within the predetermined speed region A. In this case, it can be determined that the target discharge pressure PTr is held at a predetermined value. On the other hand, when at least one of the following three conditions is satisfied, it cannot be determined that the engine speed NE changes within the predetermined speed region A.
(Condition 1) The engine speed NE at the previous execution of this processing routine is substantially equal to the engine speed NE at the current execution of this processing routine.
(Condition 2) The engine speed NE at the previous execution of this processing routine is not a value within the predetermined speed region A.
(Condition 3) When the engine speed NE at the current execution of this processing routine, that is, the current engine speed NE is not a value within the predetermined speed region A.

  Further, when the engine rotational speed NE is decreased under the condition where the target discharge pressure PTr is not changed, the discharge pressure sensor value PS becomes less than the target discharge pressure PTr. At this time, if the decrease amount DNE is large, there is a possibility that the supply amount of oil in each device 203 is insufficient. Therefore, the rotational speed decrease amount determination value DNETh is set so that it can be determined whether or not the difference between the discharge pressure sensor value PS and the target discharge pressure PTr may increase due to the decrease in the engine rotational speed NE. Has been.

  When both the engine speed NE changes within the predetermined speed region A and the decrease amount DNE is greater than or equal to the rotation speed decrease amount determination value DNETh are satisfied (step S15: YES). The feedback control unit 303 moves the process to step S18 described later. On the other hand, when either the engine speed NE changes within the predetermined speed region A or the decrease amount DNE is greater than or equal to the rotation speed decrease amount determination value DNETh is not established (step S15: NO), the feedback control unit 303 determines whether or not the decrease amount DPTr per unit time of the target discharge pressure PTr is equal to or greater than the second discharge pressure decrease amount determination value DPTrTh2 (step S16).

  When the discharge pressure sensor value PS is decreased toward the target discharge pressure PTr because the target discharge pressure PTr is smaller than the discharge pressure sensor value PS, the difference obtained by subtracting the discharge pressure sensor value PS from the target discharge pressure PTr is Negative value. Therefore, the proportional term X becomes a negative value. Further, when the decrease amount DPTr is large, the integral term Y is significantly reduced, and the integral term Y becomes a negative value. Therefore, in the present embodiment, the second discharge pressure decrease amount determination value DPTrTh2 is set so that the integral term Y becomes a negative value when the decrease amount DPTr is equal to or greater than the second discharge pressure decrease amount determination value DPTrTh2. ing.

  When the decrease amount DPTr is less than the second discharge pressure decrease amount determination value DPTrTh2 (step S16: NO), the feedback control unit 303 shifts the process to the above-described step S13. On the other hand, when the decrease amount DPTr is equal to or greater than the second discharge pressure decrease amount determination value DPTrTh2 (step S16: YES), the feedback control unit 303 determines that the decrease amount DPTr is equal to or greater than the first discharge pressure decrease amount determination value DPTrTh1. Whether or not (step S17). The first discharge pressure decrease amount determination value DPTrTh1 is set to a value larger than the second discharge pressure decrease amount determination value DPTrTh2. Therefore, when the decrease amount DPTr is equal to or greater than the first discharge pressure decrease amount determination value DPTrTh1, the integral term Y is naturally a negative value.

  If the decrease amount DPTr is equal to or greater than the first discharge pressure decrease amount determination value DPTrTh1 (step S17: YES), the feedback control unit 303 proceeds to the next step S18.

  In step S18, the feedback control unit 303 performs a second instruction value calculation process. In other words, the feedback control unit 303 calculates the proportional term X and the integral term Y of the feedback control using the target discharge pressure PTr and the discharge pressure sensor value PS, and the integral term Y by the specified value setting unit 302. A replacement process for replacing with the derived prescribed value F is performed. Then, the feedback control unit 303 obtains the instruction target discharge pressure PTrA by substituting the calculated proportional term X and the integral term Y derived by the replacement process into the relational expression (Formula 1).

  As described above, when the discharge pressure sensor value PS is decreased toward the target discharge pressure PTr because the target discharge pressure PTr is smaller than the discharge pressure sensor value PS, the decrease amount DPTr is determined as the first discharge pressure decrease amount determination. When the value is greater than or equal to value DPTrTh1, the integral term Y of the feedback control is also a negative value.

  On the other hand, the prescribed value F is a positive value and increases as the decrease amount DPTr increases as shown in FIG. Therefore, in the present embodiment, when the discharge pressure sensor value PS is decreased toward the target discharge pressure PTr in this way, the integral term Y can always be set to a value larger than “0”. That is, the first instruction value calculation process is a process of obtaining the instruction target discharge pressure PTrA using the integral term Y without correcting the integral term Y, whereas the second instruction value calculation process is In this process, the integral term Y is set to a positive value, and the instruction target discharge pressure PTrA is obtained using the integral term Y.

Returning to FIG. 6, when the instruction target discharge pressure PTrA is calculated in the second instruction value calculation process, the feedback control unit 303 proceeds to step S <b> 20 described later.
On the other hand, when the decrease amount DPTr is less than the first discharge pressure decrease amount determination value DPTrTh1 in step S17 (NO), the feedback control unit 303 performs a third instruction value calculation process (step S19). That is, the feedback control unit 303 calculates the proportional term X and the integral term Y of the feedback control using the target discharge pressure PTr and the discharge pressure sensor value PS, and other processing for making the integral term Y equal to “0”. Perform replacement processing. Then, the feedback control unit 303 obtains the instruction target discharge pressure PTrA by substituting the calculated proportional term X and the integral term Y derived by other substitution processing into the relational expression (Equation 1).

  The integral term Y derived by the other replacement correction is larger than the integral term Y without any correction and smaller than the specified value F. Therefore, the instruction target discharge pressure PTrA can be made larger than that calculated by the first instruction value calculation process and smaller than that calculated by the second instruction value calculation process. When the target discharge pressure PTrA is calculated in the third instruction value calculation process, the feedback control unit 303 moves the process to the next step S20.

  The first instruction value calculation process is a process of obtaining the instruction target discharge pressure PTrA using the integral term Y without correcting the integral term Y, whereas the third instruction value calculation process is an integral This is a process of performing another replacement process for resetting the term Y to “0” and obtaining the instruction target discharge pressure PTrA using the integral term Y.

  In step S20, the feedback control unit 303 sets the correction flag FLG to ON. That is, the correction flag FLG is calculated when the instruction target discharge pressure PTrA is calculated by another calculation process different from the first instruction value calculation process, that is, the second instruction value calculation process or the third instruction value calculation process. This flag is set to ON. Then, the feedback control unit 303 moves the process to the next step S21.

  In step S21, the feedback control unit 303 outputs the instruction target discharge pressure PTrA calculated in step S13, step S18, or step S19 to the discharge pressure control unit 304. Thereafter, the feedback control unit 303 once ends this processing routine.

  Next, with reference to FIG. 7, the operation when the second instruction value calculation process is performed because the target discharge pressure PTr has decreased will be described together with effects. Note that the thick solid line in FIG. 7 indicates the instruction target discharge pressure PTrA calculated by the second instruction value calculation process at a specified timing at which the decrease amount DPTr becomes equal to or greater than the first discharge pressure decrease amount determination value DPTrTh1. The transition of the discharge pressure sensor value PS in the present embodiment in which the command current value Iocv corresponding to is input to the actuator 100A is shown. On the other hand, the broken line in FIG. 7 indicates the discharge pressure sensor value PS in the comparative example in which the command current value Iocv corresponding to the command target discharge pressure PTrA calculated by the first command value calculation process is input to the actuator 100A even at the specified timing. It shows the transition of.

  As shown in FIG. 7, when the target discharge pressure PTr decreases at the first timing t11 in the steady state, the steady state is shifted to the unsteady state. In the example illustrated in FIG. 7, the decrease amount DPTr at the first timing t11 is equal to or greater than the first discharge pressure decrease amount determination value DPTrTh1. Therefore, at the first timing t11, which is the specified timing, the instruction target discharge pressure PTrA is calculated not by the first instruction value calculation process and the third instruction value calculation process but by the second instruction value calculation process. Is done.

  Here, in the comparative example indicated by the broken line in FIG. 7, the instruction target discharge pressure PTrA is calculated by the first instruction value calculation process even at the first timing t11. As described above, when the discharge pressure sensor value PS is decreased toward the target discharge pressure PTr because the target discharge pressure PTr is smaller than the discharge pressure sensor value PS, the target discharge pressure PTr and the discharge pressure sensor value PS are used. The integral term Y of the feedback control, that is, the integral term Y without any correction is a negative value. In the comparative example, the command current value Iocv corresponding to the command target discharge pressure PTrA calculated by the first command value calculation process using the integral term Y is input to the actuator 100A. As a result, as indicated by a broken line in FIG. 7, an undershoot occurs. After the undershoot ends, an overshoot occurs, and then the discharge pressure sensor value PS converges to the target discharge pressure PTr.

  In contrast, in the present embodiment, at the first timing t11, the instruction target discharge pressure PTrA is calculated by the second instruction value calculation process. In the second command value calculation process, the specified value F derived by the replacement process is substituted into the integral term Y, and the command target discharge pressure PTrA is calculated using the integral term Y. This integral term Y is larger than the integral term Y without any correction. Therefore, the instruction target discharge pressure PTrA can be made larger than that calculated by the first instruction value calculation process. As a result, the difference between the instruction target discharge pressure PTrA and the discharge pressure sensor value PS at the first timing t11 is smaller than that in the comparative example. Then, by inputting the command current value Iocv corresponding to the command target discharge pressure PTrA calculated by the second command value calculation process to the actuator 100A, the first command value calculation is performed after the first timing t11. The change speed of the command current value Iocv corresponding to the command target discharge pressure PTrA calculated by the processing can be lowered. As a result, as indicated by a solid line in FIG. 7, the rate of decrease in the discharge pressure sensor value PS is lower than that in the comparative example, so that the occurrence of undershoot is suppressed. Therefore, it is possible to reduce the amount of undershoot when the command current value Iocv input to the actuator 100A is changed to decrease the discharge pressure sensor value PS toward the target discharge pressure PTr. In addition, the amount of overshoot after the undershoot is completed can be made smaller than in the comparative example.

  In the present embodiment, the specified value F increases as the decrease amount DPTr at the first timing t11, which is the specified timing, increases. Therefore, the integral term Y used to calculate the target discharge pressure PTrA can be increased as the absolute value of the proportional term X of the feedback control that becomes a negative value because the decrease amount DPTr is larger. Therefore, it is possible to suppress the decrease rate of the discharge pressure sensor value PS when the discharge pressure sensor value PS is decreased toward the target discharge pressure PTr from being excessively increased, and thus it is possible to suppress an increase in the amount of undershoot.

  Further, in the present embodiment, at the specified timing, the target discharge pressure PTrA for instruction is calculated using the integral term Y (= specified value F) calculated by the second instruction value calculation process. Thereafter, the target discharge pressure PTrA for instruction is calculated using the integral term Y calculated by the first instruction value calculation process. Therefore, compared with the case where the target target discharge pressure PTrA is calculated using the integral term Y calculated by the second instruction value calculation process even after the specified timing, the rate of decrease in the discharge pressure sensor value PS is low. It can suppress becoming too much.

  Next, with reference to FIG. 8, the operation when the third instruction value calculation process is performed because the target discharge pressure PTr has decreased will be described together with effects. Note that the thick solid line in FIG. 8 indicates the instruction target discharge pressure PTrA calculated by the third instruction value calculation process at a specified timing at which the decrease amount DPTr becomes equal to or greater than the second discharge pressure decrease amount determination value DPTrTh2. The transition of the discharge pressure sensor value PS when the command current value Iocv corresponding to is input to the actuator 100A is shown. On the other hand, the broken line in FIG. 7 shows the transition of the discharge pressure sensor value PS when the command current value Iocv corresponding to the command target discharge pressure PTrA calculated by the second command value calculation process at the specified timing is input to the actuator 100A. Is shown.

  As shown in FIG. 8, when the target discharge pressure PTr becomes small at the first timing t21, the steady state shifts to the unsteady state. In the example shown in FIG. 8, the decrease amount DPTr at the first timing t21 is equal to or greater than the second discharge pressure decrease amount determination value DPTrTh2, but is less than the first discharge pressure decrease amount determination value DPTrTh1, It can be determined that the difference between the pressure sensor value PS and the target discharge pressure PTr is not so large. Therefore, at the first timing t21, the instruction target discharge pressure PTrA is calculated not by the second instruction value calculation process but by the third instruction value calculation process.

  Here, even if the decrease amount DPTr at the first timing t21 is less than the first discharge pressure decrease amount determination value DPTrTh1, the instruction current corresponding to the instruction target discharge pressure PTrA calculated by the second instruction value calculation process It is assumed that the value Iocv is input to the actuator 100A. In this case, as indicated by a broken line in FIG. 8, the rate of decrease in the discharge pressure sensor value PS is reduced by the amount by which the change rate of the indicated current value Iocv after the first timing t21 is low. As a result, although the undershoot amount can be reduced, the time required for the discharge pressure sensor value PS to converge to the target discharge pressure PTr from the first timing t21 becomes longer.

  On the other hand, in the present embodiment, the decrease amount DPTr at the first timing t21 that is the specified timing is equal to or greater than the second discharge pressure decrease amount determination value DPTrTh2, and the first discharge pressure decrease amount determination When the value is less than the value DPTrTh1, the instruction target discharge pressure PTrA is calculated by the third instruction value calculation process. Compared to the case where the instruction target discharge pressure PTrA is calculated by the second instruction value calculation process in which the integral term Y is a positive value by the replacement process, the integral term Y is set to “0” in the third instruction value calculation process. Therefore, the instruction target discharge pressure PTrA can be reduced. Therefore, the difference between the instruction target discharge pressure PTrA and the discharge pressure sensor value PS at the first timing t21 is larger than that in the case where the instruction target discharge pressure PTrA is calculated by the second instruction value calculation process. . Then, by inputting the command current value Iocv corresponding to the command target discharge pressure PTrA calculated by the third command value calculation process at the first timing t21 to the actuator 100A, after the first timing t21, The changing speed of the command current value Iocv corresponding to the command target discharge pressure calculated by the first command value calculation process can be increased. As a result, compared to the case where the command current value Iocv corresponding to the command target discharge pressure PTrA calculated by the second command value calculation process is input to the actuator 100A, the decrease rate of the discharge pressure sensor value PS can be increased. As a result, the time required for the discharge pressure sensor value PS to converge to the target discharge pressure PTr can be shortened.

  Although the instruction target discharge pressure PTrA calculated by the third instruction value calculation process is smaller than the instruction target discharge pressure PTrA calculated by the second instruction value calculation process, the first instruction value calculation process is performed. Is larger than the instruction target discharge pressure PTrA calculated by. Therefore, the instruction target discharge pressure PTrA is calculated by the first instruction value calculation process at the first timing t21, and the instruction current value Iocv corresponding to the instruction target discharge pressure PTrA is input to the actuator 100A. The decrease rate of the indicated current value Iocv can be reduced. As a result, the undershoot amount can be reduced.

  In the present embodiment, at the specified timing, the target discharge pressure PTrA for instruction is calculated using the integral term Y (= 0) calculated by the third instruction value calculation process, but after the specified timing. The instruction target discharge pressure PTrA is calculated using the integral term Y calculated by the first instruction value calculation process. Therefore, the decrease rate of the discharge pressure sensor value PS is lower than when the target target discharge pressure PTrA is calculated using the integral term Y calculated by the third instruction value calculation process even after the specified timing. It can suppress becoming too much.

Next, the operation when the second instruction value calculation process is performed because the engine speed NE has decreased in the predetermined speed region A will be described together with effects.
Since the oil pump 10 is an engine-driven pump that is driven in synchronization with the rotation of the crankshaft, when the engine rotational speed NE is reduced, the oil discharge pressure in the oil pump 10 is reduced. That is, the discharge pressure sensor value PS falls below the target discharge pressure PTr. The operation of the oil pump 10 is controlled so that the discharge pressure sensor value PS is increased to the target discharge pressure PTr. At this time, when the engine rotational speed NE decreases within the predetermined speed region A, if the decrease amount DNE per unit time is equal to or greater than the rotational speed decrease amount determination value DNETh, the second instruction value calculation process performs the instruction. A target discharge pressure PTrA is calculated. Therefore, the integral term Y used for calculation of the instruction target discharge pressure PTrA does not necessarily become a negative value. Then, the command current value Iocv corresponding to the command target discharge pressure PTrA is input to the actuator 100A. Therefore, the increase rate of the discharge pressure sensor value PS is less likely to be lower than when the instruction target discharge pressure PTrA is calculated by the first instruction value calculation process. As a result, the discharge pressure sensor value PS can be increased to the target discharge pressure PTr at an early stage.

  In this embodiment, at the timing when it is determined that the decrease amount DNE is equal to or greater than the rotational speed decrease amount determination value DNETh, the integral term Y (= specified value F) calculated by the second instruction value calculation process is used. While the instruction target discharge pressure PTrA is calculated, the instruction target discharge pressure PTrA is calculated using the integral term Y calculated by the first instruction value calculation process after the timing. For this reason, the increase rate of the discharge pressure sensor value PS is higher than when the target target discharge pressure PTrA is calculated using the integral term Y calculated by the second instruction value calculation process even after the timing. It can suppress becoming too much.

The above embodiment may be changed to another embodiment as described below.
In the third instruction value calculation process, the integral term Y may be replaced with a value slightly different from “0”, and the instruction target discharge pressure PTrA may be calculated using the integral term Y.

  If the decrease amount DPTr per unit time of the target discharge pressure is greater than or equal to the first discharge pressure decrease amount determination value DPTrTh1, if the specified value F can be increased as the decrease amount DPTr increases, the decrease amount DPTr increases. Sometimes, the specified value F may be increased stepwise.

  The specified value F may be varied according to the decrease amount DPTr even if the decrease amount DPTr per unit time of the target discharge pressure is less than the first discharge pressure decrease amount determination value DPTrTh1.

  -Both the engine speed NE changes within the predetermined speed region A and the decrease amount DNE per unit time of the engine speed NE is greater than or equal to the rotation speed decrease amount determination value DNETh. If so, the specified value F may be increased as the decrease amount DNE is larger.

The specified value F may be fixed at a predetermined value regardless of the reduction amount DPTr per unit time of the target discharge pressure. However, this constant value is a positive value.
When the decrease amount DPTr per unit time of the target discharge pressure is less than the first discharge pressure decrease amount determination value DPTrTh1, the specified value F is fixed at a first value larger than “0”, and the decrease amount DPTr is When the discharge pressure decrease amount determination value DPTrTh1 is equal to or greater than 1, the specified value F may be fixed at a second value larger than the first value.

  When the target discharge pressure PTr has decreased, but the decrease amount DPTr per unit time is less than the first discharge pressure decrease amount determination value DPTrTh1 and not less than the second discharge pressure decrease amount determination value DPTrTh2, The command current value Iocv corresponding to the command target discharge pressure PTrA calculated by the command current value calculation process 1 may be continuously input to the actuator 100A.

  -Both the engine speed NE changes within the predetermined speed region A and the decrease amount DNE per unit time of the engine speed NE is greater than or equal to the rotation speed decrease amount determination value DNETh. If the target discharge pressure PTrA for instruction can be calculated using the integral term Y that is not a negative value, a process different from the second instruction value calculation process may be performed. For example, the other process may be a third instruction value calculation process. Another process is to use the integral term Y as the integral term Y, which is the larger of the integral term Y calculated without performing the above substitution processing or any other substitution processing, and the predetermined value. Processing for calculating the target discharge pressure PTrA for instruction may be used. In this case, the predetermined value is set to a value equal to “0” or a value greater than “0”.

  In the above embodiment, when the target discharge pressure PTr is decreased or the engine rotational speed NE is decreased and the second instruction value calculation process or the third instruction value calculation process is performed, the first instruction value After the command current value Iocv corresponding to the command target discharge pressure PTrA calculated by another calculation process that is not the calculation process is input once to the actuator 100A, the command target discharge pressure calculated by the first command value calculation process The command current value Iocv corresponding to PTrA is input to actuator 100A. However, the present invention is not limited to this, and when the second instruction value calculation process or the third instruction value calculation process is performed, an instruction corresponding to the instruction target discharge pressure PTrA calculated in the other calculation process for a specified period. The current value Iocv may be continuously input to the actuator 100A, and then the command current value Iocv corresponding to the command target discharge pressure PTrA calculated in the first command value calculation process may be input to the actuator 100A.

  In the above embodiment, the target target discharge pressure PTrA is calculated using the proportional term X and the integral term Y of the feedback control. However, in addition to the proportional term X and the integral term Y, a differential term is also used. Thus, the target discharge pressure PTrA for instruction may be calculated.

  In the above embodiment, the oil supply device 210 includes a gear pump as the oil pump 10. However, the oil supply apparatus 210 may be configured to include another type of pump (for example, a vane pump) other than the gear pump as the oil pump 10.

  The oil pump may be an electric pump instead of an engine driven pump. In this case, the electric motor for driving the oil pump corresponds to the actuator, and the oil discharge pressure in the oil pump is controlled by adjusting the rotation speed of the electric motor, that is, the command current value for the electric motor. Can do. In the oil supply apparatus including such an electric oil pump, when the target discharge pressure PTr decreases and it can be determined that the difference between the discharge pressure sensor value PS and the target discharge pressure PTr is large, the second instruction value calculation process is performed. Alternatively, the instruction target discharge pressure PTrA is calculated by the third instruction value calculation process, and the instruction current value corresponding to the instruction target discharge pressure PTrA is input to the electric motor. After such an instruction current value is input to the electric motor, an undershoot occurs by inputting an instruction current value corresponding to the instruction target discharge pressure PTrA calculated by the first instruction value calculation process to the electric motor. Can be suppressed.

  In the oil supply device including such an electric oil pump, the rotation speed of the electric motor is not synchronized with the engine rotation speed NE. Therefore, even if the engine rotational speed NE decreases, the command current value corresponding to the command target discharge pressure PTrA calculated by the second command value calculation process is input to the electric motor as long as the rotation speed of the electric motor does not increase. There is no.

  DESCRIPTION OF SYMBOLS 10 ... Oil pump, 100A ... Actuator, 200 ... Engine, 210 ... Oil supply apparatus, 302 ... Specified value setting part, 303 ... Feedback control part, 304 ... Discharge pressure control part, 311 ... Discharge pressure sensor.

Claims (5)

An oil supply device comprising an oil pump, an actuator, and a sensor for detecting the pressure of oil discharged from the oil pump, wherein the oil discharge pressure in the oil pump changes when the operation amount of the actuator is changed Because
A proportional term and an integral term of feedback control using a target discharge pressure, which is a target value of the discharge pressure for the oil pump, and a discharge pressure sensor value, which is the pressure of oil detected by the sensor, are represented by the target discharge pressure. A feedback control unit for obtaining a target discharge pressure for instruction calculated by adding to
A discharge pressure control unit that controls the discharge pressure of oil in the oil pump by operating the actuator based on an operation amount corresponding to the calculated target discharge pressure for instruction,
The feedback control unit replaces the integral term of the feedback control with a specified value that is a positive value on condition that the amount of decrease in the target discharge pressure per unit time is equal to or greater than the discharge pressure decrease amount determination value. An oil supply device that performs processing and obtains a target discharge pressure for instruction calculated by adding the proportional term of the feedback control and the integral term after the processing to the target discharge pressure. The oil pump is driven in synchronization with the rotation of the crankshaft of the engine,
The feedback control unit performs a process that does not set the integral term of the feedback control to be a negative value on condition that the amount of decrease in the engine rotational speed per unit time is equal to or greater than the rotational speed decrease amount determination value. The oil supply apparatus according to claim 1, wherein an instruction target discharge pressure calculated by adding a proportional term of the above and an integral term after the processing to the target discharge pressure is obtained. The oil supply apparatus according to claim 1, further comprising a specified value setting unit that increases the specified value as the amount of decrease in the target discharge pressure per unit time increases. The feedback control unit uses an integral term that is not subjected to the substitution process after the actuator is operated with an operation amount corresponding to the target discharge pressure for instruction calculated using the integral term derived by the substitution process. The oil supply apparatus according to claim 1, wherein the target discharge pressure for instruction is calculated. When the discharge pressure decrease amount determination value is the first discharge pressure decrease amount determination value,
The feedback control unit has a first reduction amount of the target discharge pressure per unit time that is less than the first discharge pressure drop amount determination value and smaller than the first discharge pressure drop amount determination value. 2 on the condition that the discharge pressure decrease amount determination value is equal to or greater than 2, another substitution process is performed to make the integral term of the feedback control equal to “0”, and the proportional term of the feedback control and the integral term after the processing The oil supply device according to any one of claims 1 to 4, wherein an instruction target discharge pressure is calculated by adding to the target discharge pressure.

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