JP7348850B2 - Pump control device and pump control method - Google Patents

Description

The present invention relates to a pump control device and a pump control method.

Patent Document 1 discloses a vane-type hydraulic pump that has an oil pressure rise detection means and a warning generation means provided at a specific location, and is configured to issue a warning when the oil temperature at the specific location exceeds a predetermined value. A failure detection device for a vane type hydraulic pump is disclosed.

Japanese Patent Application Publication No. 2008-190400

In the pump described in Patent Document 1, the hydraulic oil and oil pressure deteriorate due to poor lubrication of sliding parts (for example, between the rotor and the side plate, between the vane and the side plate, etc.) due to deterioration of the hydraulic oil or the contamination of foreign matter. It is possible to detect the occurrence of a rise in temperature and give a warning to the driver by activating the warning generating means.

However, newly providing a hydraulic pressure sensor and an oil temperature sensor for detecting abnormalities in the pump leads to an increase in cost.

The present invention has been made in view of these problems, and an object of the present invention is to provide a pump control device that can detect abnormalities in a pump while suppressing an increase in cost.

A pump control device according to an aspect of the present invention includes a pump section that pressurizes and discharges fluid, a motor that drives the pump section, a control section that controls rotation of the motor, and a current detection section that detects a current flowing through the motor. and. The pump section includes a shaft to which power from the internal combustion engine is transmitted, a first rotating body that rotates around the rotational axis of the shaft together with the shaft by the power from the internal combustion engine, and a pump that houses the first rotating body and houses the pump inside. A second rotating body that defines a chamber and is rotatable by power from a motor; a pair of side plates disposed on both sides of the second rotating body in the direction of the rotational axis of the shaft; and a pair of side plates. A suction port provided on one side of the side plate for sucking in oil, a discharge port provided on the other side of the pair of side plates for discharging oil, a second rotating body and a pair of side plates are fixed inside, and the second rotating body and a cylinder that rotates together with the pair of side plates, and a housing that accommodates the cylinder inside. The control section detects an abnormality in the pump section based on the current detected by the current detection section.

According to another aspect of the present invention, a pump control method corresponding to the above pump control device is provided.

Since the existing device is equipped with a current detection section that detects the current of the motor, there is no need to separately provide a sensor for detecting an abnormality. Therefore, an increase in cost can be suppressed. Furthermore, since there is no need to secure space for newly providing a sensor for detecting an abnormality, it is possible to suppress the increase in size of the device.

FIG. 1 is a schematic configuration diagram of a pump system to which the twin drive pump of this embodiment is applied. FIG. 2 is an axial cross-sectional view of the twin drive pump of this embodiment. FIG. 3 is a partial sectional view of the vicinity of the pump chamber in a direction perpendicular to the axial direction of the twin drive pump of this embodiment. FIG. 4 is a diagram illustrating the operation mode of the twin drive pump of this embodiment. FIG. 5 is an example of a flowchart of abnormality detection control performed in this embodiment. FIG. 6 is an example of a flowchart of abnormality detection control performed in a modified example of this embodiment. FIG. 7 is an example of a flowchart of abnormality detection control performed in a modified example of this embodiment.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic configuration diagram of a pump control device 100 according to the present embodiment. FIG. 2 is an axial cross-sectional view of the twin drive pump 10 of the pump control device 100 according to the present embodiment.

Pump control device 100 is mounted on a vehicle equipped with engine 1 as an internal combustion engine.

As shown in FIG. 1, the pump control device 100 includes a twin drive pump 10 as a pump section that pressurizes and discharges oil as a fluid, a motor 20 that drives the pump 10, and a control device that controls the rotation of the motor 20. A controller 30 as a section.

As shown in FIGS. 2 and 3, the twin drive pump 10 (hereinafter simply referred to as "pump 10") is connected to the output shaft 1a of the engine 1, and serves as a shaft to which power from the engine 1 is transmitted. A drive shaft 12 , a rotor 13 as a first rotating body that rotates around the rotation axis of the drive shaft 12 in a first direction (see arrow in FIG. 3) together with the drive shaft 12 by power from the engine 1; a cam ring 15 as a second rotating body that houses therein, a first side plate 16 and a second side plate 17 as a pair of side plates disposed on both sides of the cam ring 15 in the direction of the rotation axis of the drive shaft 12; A cam ring 15, a first side plate 16, and a second side plate 17 are fixed therein, and includes a cylinder 18 that rotates together with these, and a housing 11 that accommodates the cylinder 18 and rotatably supports the cylinder 18. .

As shown in FIG. 2, the housing 11 is a case of the pump 10, and has a partition wall 11a, an inlet port 11b, and an outlet port 11c. The partition wall 11a divides the inside of the housing 11 into a first oil chamber H1 and a second oil chamber H2 in the axial direction of the drive shaft 12. The inlet port 11b opens into the first oil chamber H1 and communicates between the inside and outside of the housing 11. The outlet port 11c opens into the second oil chamber H2 and communicates between the inside and outside of the housing 11. Oil stored in a tank (not shown) passes through the strainer 50 and flows into the inlet port 11b, and oil supplied to the hydraulic control circuit 40 is discharged from the outlet port 11c (see FIG. 1). .

The drive shaft 12 is provided coaxially with the rotation axis of the rotor 13. One end of the drive shaft 12 is connected to the rotor 13, and the other end is rotatably provided in the housing 11 so as to protrude outside the housing 11. Power from the engine 1 is transmitted to the drive shaft 12 via a power transmission mechanism (not shown). Drive shaft 12 constitutes a first input shaft of pump 10 .

The rotor 13 is formed in a cylindrical shape and is driven by the drive shaft 12 to rotate around the rotation axis of the drive shaft 12 . A plurality of slit grooves are provided radially in the rotor 13, and a vane 14 is provided in each slit groove. Each vane 14 is provided so as to be able to protrude and retract from the outer peripheral surface of the rotor 13.

The cam ring 15 houses the rotor 13 therein. The cam ring 15 is provided coaxially with the rotation axis of the drive shaft 12 and rotatable with respect to the rotor 13 . The inner circumferential surface of the cam ring 15 is constituted by a cam surface whose distance from the outer circumference of the rotor 13 changes in the circumferential direction around the rotation axis of the rotor 13. The tip portion of the vane 14 slides on the inner peripheral surface of the cam ring 15.

The first side plate 16 and the second side plate 17 are arranged on both sides of the cam ring 15 in the rotation axis direction of the rotor 13 so as to face the end surface of the rotor 13, respectively. The first side plate 16 is provided with two suction ports 16a, 16b, and the second side plate 17 is provided with two discharge ports 17a, 17b. A pump chamber P is defined by the first side plate 16, the second side plate 17, the inner peripheral surface of the cam ring 15, the outer peripheral surface of the rotor 13, and the adjacent vanes 14.

As shown in FIG. 3, the suction ports 16a and 16b are provided so as to open into a region IN (suction region) where the pump chamber P expands in the circumferential direction around the rotation axis of the rotor 13. The discharge ports 17a and 17b are provided so as to open into a region OUT (discharge region) where the pump chamber P is reduced in the circumferential direction around the rotation axis of the rotor 13. As the rotor 13 rotates, oil is sucked into the pump chamber P from the suction ports 16a and 16b, and as the volume of the pump chamber P is reduced, the oil is pressurized and discharged from the discharge ports 17a and 17b.

As described above, in this embodiment, two suction ports 16a, 16b and two discharge ports 17a, 17b are provided. As a result, in the pump 10, the pump chamber P repeats suction and discharge of oil twice while the vane 14 goes around the cam surface.

As shown in FIG. 2, the cylinder 18 is formed into a substantially cylindrical shape with a bottom, and is supported by the housing 11 so as to be rotatable coaxially with the rotation axis of the rotor 13. The cylinder 18 has a holding part 18a, a connecting part 18b, a shaft part 18c, and an outlet port 18d.

The holding portion 18a is formed in a cylindrical shape and holds the cam ring 15, the first side plate 16, and the second side plate 17 therein. The cam ring 15, the first side plate 16, and the second side plate 17 are fixed within the holding portion 18a and rotate integrally with the cylinder 18. The cylinder 18 has an opening at the holding portion 18a, and the first side plate 16 is provided so as to close the opening of the cylinder 18. The holding portion 18a is accommodated in the first oil chamber H1.

The connecting portion 18b connects the holding portion 18a and the shaft portion 18c. In this embodiment, the connecting portion 18b is formed so that the diameter thereof gradually decreases from the holding portion 18a toward the shaft portion 18c. Oil discharged from the discharge ports 17a and 17b flows into the connection portion 18b. The connecting portion 18b is accommodated in the first oil chamber H1.

The shaft portion 18c is a hollow shaft-shaped portion whose diameter is smaller than that of the holding portion 18a, and oil flows into the shaft portion 18c from the connecting portion 18b. The shaft portion 18c is connected to the output shaft 20a of the motor 20 via the one-way clutch 19. Thereby, when the power of the motor 20 is transmitted to the shaft portion 18c, the cam ring 15, the first side plate 16, and the second side plate 17 rotate together with the cylinder 18. The shaft portion 18c constitutes a second input shaft of the pump 10.

The shaft portion 18c is provided so as to penetrate the partition wall 11a of the housing 11 and protrude outside the housing 11. The drive shaft 12 and the shaft portion 18c are provided so as to protrude toward opposite sides in the direction of the rotation axis of the rotor 13.

The shaft portion 18c is provided with a plurality of outlet ports 18d. The outlet port 18d communicates the inside and outside of the shaft portion 18c in the radial direction. A portion of the shaft portion 18c where the outlet port 18d is provided is accommodated in the second oil chamber H2. Therefore, the oil in the shaft portion 18c flows out into the second oil chamber H2 via the outlet port 18d. The oil flowing into the second oil chamber H2 is then supplied to the hydraulic control circuit 40 via the outlet port 11c.

The one-way clutch 19 is provided between the shaft portion 18c and the output shaft 20a of the motor 20. The one-way clutch 19 is engaged when the rotational speed of the output shaft 20a is higher than the rotational speed of the shaft portion 18c in the reverse rotation direction of the rotor 13, and therefore in the driving direction of the motor 20. is released when the rotation speed is lower than

Therefore, when the motor 20 is operated, the one-way clutch 19 is engaged, and the power from the motor 20 is transmitted to the shaft portion 18c. As a result, the cam ring 15, the first side plate 16, and the second side plate 17 are driven by the power of the motor 20 and rotate in the reverse direction of the rotor 13.

The motor 20 is configured by, for example, a brushless motor. The motor 20 is driven by a battery mounted on the vehicle as a power source. The current consumption Ic detected by the current sensor 60 serving as a current detection unit that detects the current flowing through the motor 20 (current consumption Ic) is input to the controller 30 .

The controller 30 is composed of a microcomputer equipped with a central processing unit (CPU), a read-only memory (ROM), a random access memory (RAM), and an input/output interface (I/O interface). The controller 30 can also be configured with a plurality of microcomputers.

Next, the operation mode of the pump 10 will be explained with reference to FIG. 4.

The controller 30 switches the operation mode of the pump 10 according to the driving situation of the vehicle while referring to the map shown in FIG. As shown in FIG. 4, the pump control device 100 of this embodiment has two operating modes: an MOP mode in which only the rotor 13 is rotated by the engine 1, an EOP mode in which only the cam ring 15 is rotated by the motor 20, and an EOP mode in which only the cam ring 15 is rotated by the motor 20. It has a TDP mode in which the rotor 13 and the cam ring 15 are relatively rotated by the motor 20.

The MOP mode is selected when the rotational speed Ve of the engine 1 is high. Specifically, the flow rate required by the hydraulic equipment installed in the vehicle (hereinafter referred to as "required flow rate") is determined by the discharge amount that is discharged only by the rotation of the rotor 13 (only by the rotation by the power of the engine 1). Selected when the flow rate can cover the problem. The rotational speed of the rotor 13, that is, the discharge flow rate of the pump 10, is proportional to the rotational speed Ve of the engine 1. Therefore, when the rotational speed Ve of the engine 1 is high, the required flow rate can be covered by the discharge flow rate based only on the power of the engine 1, so the motor 20 is maintained in a stopped state.

EOP mode is selected when engine 1 is stopped. When an idling stop, a coast stop, a sailing stop, or the like is being executed, the engine 1 is stopped, so the rotation of the rotor 13 is also stopped. Therefore, when the engine 1 is stopped, the controller 30 drives the motor 20 to rotate the cam ring 15 in order to cover the required flow rate. As a result, the rotor 13 is substantially rotated, so that the pump 10 can cover the required flow rate.

The TDP mode is selected when the required flow rate cannot be covered by the discharge flow rate based only on the power of the engine 1, specifically when the rotational speed Ve of the engine 1 is low. As described above, when only the engine 1 is being driven, the discharge flow rate of the pump 10 is proportional to the rotational speed Ve of the engine 1. Therefore, when the rotational speed Ve of the engine 1 is low, the discharge flow rate based only on the power of the engine 1 cannot be satisfied, so the controller 30 drives the motor 20 and moves the cam ring 15 in the rotational direction of the rotor 13 ( (first direction) and the opposite direction (second direction). As a result, the rotational speed of the rotor 13 can be substantially increased, so that the required flow rate, which was insufficient by the discharge flow rate based only on the power of the engine 1, can be covered.

By the way, for example, if a foreign object gets caught between the rotor 13 and the first and second side plates 16 and 17, or if seizure occurs between the rotor 13 and the first and second side plates 16 and 17, If this happens, the rotational resistance of the pump 10 will increase, and the pump 10 may not operate properly. If the pump 10 ceases to operate normally in this way, there is a risk that it will not be able to meet the required flow rate, or that the load will increase and an abnormality will occur in the motor 20.

Therefore, it is conceivable to newly provide a hydraulic pressure sensor or an oil temperature sensor to detect abnormalities in the pump, but providing a new sensor would lead to an increase in cost. Therefore, in this embodiment, the occurrence of an abnormality in the pump 10 is detected based on the current consumption Ic detected by the existing current sensor 60. Furthermore, the present embodiment performs necessary control (fail-safe control) to cover the required flow rate when an abnormality occurs in the pump 10. The control for detecting the occurrence of an abnormality in the pump control device 100 (hereinafter referred to as "abnormality detection control") in this embodiment will be specifically described below with reference to FIGS. 5 to 7.

FIG. 5 is a diagram showing a flowchart related to abnormality detection control of this embodiment. The abnormality detection control of this embodiment is executed based on a program stored in the controller 30 in advance.

In step S1, normal running state processing is executed. Specifically, in the normal running state process, the controller 30 stops the motor 20 and monitors the running state of the vehicle.

In step S2, the pump status is checked. Specifically, the controller 30 reads the pump status (abnormality flag) indicating whether the pump 10 is normal or abnormal, which is stored in the nonvolatile memory. Note that at the initial stage, the pump status is normal (no abnormality flag).

In step S3, it is determined whether the pump condition is normal or above. Specifically, the controller 30 determines whether the pump state read in step S2 is normal or abnormal (presence or absence of an abnormality flag). If the pump condition is abnormal, the process proceeds to step S4, and if the pump condition is normal, the process proceeds to step S5.

In step S4, pump abnormal state processing is executed. Specifically, the controller 30 executes the following processing.
(a) Restriction on gear shift speed (b) Restriction on output torque τe of engine 1 (c) Restriction on rotational speed Ve of engine 1 (d) Prohibition of transition to EOP mode (e) Notification of abnormality to driver These are: , corresponds to fail-safe control when an abnormality occurs in the pump 10. Note that it is not always necessary to execute all of these processes, and they may be performed selectively as necessary or depending on the driving state.

In step S5, it is determined whether motor operating conditions are satisfied. Specifically, the controller 30 determines whether TDP mode or EOP mode is selected as the operating mode. If TDP mode or EOP mode is selected, the process advances to step S6, and if TDP mode or EOP mode is not selected, that is, if it is MOP mode, the process advances to RETURN.

In step S6, it is determined whether the motor 20 is operable. Specifically, the controller 30 checks whether there is any abnormality in the supply voltage (battery voltage) supplied to the motor 20, the temperature of the motor 20, and the communication state between the controller 30 and the motor 20. If there is no abnormality in the motor 20, it is determined that it is operable and the process proceeds to step S7, and if there is any abnormality in the motor 20, it is determined that the motor 20 is not operable and the process proceeds to step S12.

In step S7, the motor 20 is activated. Specifically, the controller 30 operates the motor 20 so that the required flow rate can be met.

In step S8, the current consumption Ic is stored. Specifically, the controller 30 stores the current consumption Ic while operating the motor 20 in a nonvolatile memory.

In step S9, it is determined whether the current consumption Ic exceeds a permissible value (predetermined value) Ip. If a foreign object gets caught between the rotor 13 and the first and second side plates 16 and 17, or if seizure occurs between the rotor 13 and the first and second side plates 16 and 17, Since the rotational resistance of the rotor 13 increases, the current consumption Ic of the motor 20 increases. Therefore, in this embodiment, the current consumption Ic of the motor 20 is monitored, and if the current consumption Ic exceeds the allowable value Ip, it is determined that an abnormality has occurred in the pump 10. If the current consumption Ic exceeds the allowable value Ip, it is determined that an abnormality has occurred in the pump 10, and the process proceeds to step S13, where the pump state is stored in the nonvolatile memory as an abnormality (with an abnormality flag set). If the current consumption Ic does not exceed the allowable value Ip, it is determined that the pump 10 is normal, and the process proceeds to step S10.

In step S10, it is determined whether the motor operating conditions are not satisfied. Specifically, when the MOP mode is selected, the controller 30 determines that the motor operating condition is not satisfied. If the MOP mode is selected, the process proceeds to step S11, and if the MOP mode is not selected, that is, if the TDP mode or EOP mode continues, the process returns to step S7.

In step S11, the motor 20 is stopped. The controller 30 cancels the TDP mode or the EOP mode and stops the motor 20.

Next, a case will be described in which it is determined in step S6 that the motor 20 is inoperable and the process proceeds to step S12.

In step S12, the motor 20 is controlled to be inactive. In this case, the controller 30 determines that an abnormality has occurred in the motor 20 and maintains the MOP mode without shifting to the EOP mode or TDP mode. Specifically, the controller 30 prohibits execution of idle stop control, coast stop control, and sailing stop control. Further, when the controller 30 determines that the required flow rate cannot be covered by the discharge flow rate based only on the power of the engine 1 at the present time, the controller 30 increases the rotational speed Ve of the engine 1. Thereby, even if the motor 20 is inoperable, the required flow rate can be ensured only by the power of the engine 1, so that necessary speed change control, lubrication, etc. can be performed. Note that at this time, the driver may be notified of the occurrence of the abnormality. These correspond to fail-safe control when an abnormality occurs in the motor 20.

When the ignition switch is turned on, the flow shown in FIG. 5 is repeatedly executed.

In this manner, in the abnormality detection control of this embodiment, abnormality in the pump 10 is detected by monitoring the current consumption Ic of the motor 20. Since the current sensor 60 that detects the current of the motor 20 is provided in the existing device, there is no need to newly provide a sensor for detecting an abnormality. Therefore, an increase in cost can be suppressed. Furthermore, since there is no need to secure a space for providing a sensor for detecting an abnormality, it is possible to suppress the increase in size of the device.

Note that a hydraulic pressure sensor is provided in the hydraulic control circuit 40 to detect hydraulic pressure. In terms of using existing sensors, it is also conceivable to use this oil pressure sensor to detect abnormalities. However, even if an abnormality occurs and the rotational resistance of the pump 10 increases, the torque of the engine 1 is large, so even if the rotational resistance increases to some extent, the necessary hydraulic pressure cannot be supplied. Therefore, when detecting an abnormality using a hydraulic sensor, there is a possibility that the abnormality can only be discovered after the abnormality of the pump 10 has progressed. In contrast, in the abnormality detection control of the present embodiment, the current consumption Ic of the motor 20 is monitored, that is, the torque of the motor 20 is monitored, so that abnormalities in the pump 10 can be discovered at an early stage.

Furthermore, in the abnormality detection control of this embodiment, when an abnormality in the pump 10 is detected, operation of the motor 20 is prohibited. This can prevent overload from acting on the motor 20. Further, even if the operation of the motor 20 is prohibited, necessary speed change control, lubrication, etc. can be performed by operating the pump 10 with the engine 1 having a large torque. In this case as well, in order to prevent excessive torque from acting on the pump 10, the output torque τe of the engine 1 and the rotational speed Ve of the engine 1 are limited. Furthermore, the speed of shifting is limited to reduce the required oil pressure. In this manner, in the abnormality detection control of the present embodiment, when an abnormality in the pump 10 is detected, appropriate fail-safe control can be performed to prevent the vehicle from becoming unable to travel.

Next, a modification of the abnormality detection control of this embodiment will be described with reference to FIGS. 6 and 7. Note that steps S1 to S13 shown in FIG. 6 are the same as steps S1 to S13 in the flowchart shown in FIG. 5, so a description thereof will be omitted.

In this modification, if the condition for operating the motor 20 continues for a predetermined time, that is, if the motor 20 is not operating for a predetermined time, the motor 20 is operated to detect an abnormality in the pump 10. . This will be explained in detail below.

In step S5 of this modification, if the TDP mode or EOP mode is not selected, the process advances to step S22 (see FIG. 7).

In step S22, it is determined whether a predetermined time T1 has elapsed since the previous operation of the motor 20 ended. Specifically, it is determined whether a predetermined time T1 has elapsed since the motor 20 stopped in step S11. Note that a timer is constantly operating in the controller 30, and when the motor 20 is stopped in step S11, the timer is reset (step S21). If the predetermined time T1 has elapsed since the previous operation of the motor 20 ended, the process advances to step S23, and if the predetermined time T1 has not elapsed since the previous end of the operation of the motor 20, the process advances to RETURN.

In step S23, it is determined whether the motor 20 is operable. The specific determination method is the same as step S6, so the explanation will be omitted. If there is no abnormality in the motor 20, it is determined that it is operable and the process proceeds to step S24, and if there is any abnormality in the motor 20, it is determined that the motor 20 is not operable and the process proceeds to RETURN.

In step S24, a pump diagnosis mode is executed. Specifically, the T2 motor 20 is operated at a predetermined rotational speed for a predetermined period of time. The reason for operating the motor 20 in this way is not to cover the required flow rate by operating the motor 20, but to detect an increase in the rotational resistance of the pump 10, that is, to detect an abnormality in the pump.

Steps S25 to S27 are the same as steps S9, S11, and S13, respectively, so a description thereof will be omitted.

Note that after the motor 20 is stopped in step S27, the timer is reset in step S28.

In this manner, in this modification, when the motor 20 is not operating for the predetermined time T1, the motor 20 is operated to detect an abnormality in the pump 10. As a result, in addition to the effects of the embodiment described above, the pump 10 can be periodically diagnosed, so that abnormalities in the pump 10 can be discovered at an early stage.

The configuration, operation, and effects of the embodiment of the present invention configured as described above will be collectively described.

The pump control device 100 includes a pump section (pump 10) that pressurizes and discharges fluid, a motor 20 that drives the pump section (pump 10), a control section (controller 30) that controls the rotation of the motor 20, and a motor. 20 (current consumption Ic). The pump unit (pump 10) includes a shaft (drive shaft 12) to which power from the internal combustion engine (engine 1) is transmitted, and a shaft (drive shaft 12) that is integrated with the shaft (drive shaft 12) by the power from the internal combustion engine (engine 1). A first rotating body (rotor 13) that rotates around the rotation axis of the drive shaft 12) and a pump chamber P that accommodates the first rotating body (rotor 13) and are rotated by the power from the motor 20. A second rotary body (cam ring 15) is provided, and a pair of side plates (first and second side plates 16, 17), suction ports 16a, 16b provided on the first side plate 16 for sucking oil, discharge ports 17a, 17b provided on the second side plate 17 for discharging oil, and a second rotating body. (cam ring 15) and a pair of side plates (first and second side plates 16, 17) are fixed inside. , 17), and a housing 11 that accommodates the cylinder 18 inside.

The controller 30 diagnoses an abnormality in the pump section (pump 10) based on the current (current consumption Ic) detected by the current detection section (current sensor 60).

Since the current detection unit (current sensor 60) that detects the current of the motor 20 is also provided in the existing device, there is no need to newly provide a sensor for detecting an abnormality, and an increase in cost can be suppressed. Furthermore, since there is no need to secure a space for providing a sensor for detecting an abnormality, it is possible to suppress the increase in size of the device (an effect corresponding to the inventions according to claims 1 and 4).

The pump control device 100 operates in an MOP mode in which only the first rotating body (rotor 13) is rotated by the internal combustion engine (engine 1), an EOP mode in which only the second rotating body (cam ring 15) is rotated by the motor 20, and an internal combustion engine mode. The controller 30 has a TDP mode in which the first rotating body (rotor 13) and the second rotating body (cam ring 15) are relatively rotated by relatively rotating the engine 1 and the motor 20. An abnormality is determined when executing mode or TDP mode.

By determining the abnormality while executing the EOP mode or the TDP mode, there is no need to perform special control separately, so that the control can be simplified (an effect corresponding to the invention according to claim 2).

If the T1 motor 20 is not operating for a predetermined period of time, the controller 30 operates the motor 20 and determines whether there is an abnormality.

By operating the motor 20 and detecting the pump 10 when the motor 20 is not operating for a predetermined time T1, the pump 10 can be detected periodically. Therefore, an abnormality in the pump 10 can be detected early (an effect corresponding to the invention according to claim 3).

Although the embodiments of the present invention have been described above, the above embodiments merely show a part of the application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiments. isn't it. Further, the above embodiment and the modified example can be combined as appropriate.

In the above embodiment, a vane pump is used as an example of the pump 10, but the twin drive pump 10 may be an internal gear pump.

Further, in the above embodiment, the case where the pump 10 is provided with two suction ports 16a and 16b has been described as an example, but the number of suction ports and discharge ports (suction region IN and discharge region OUT) is one each. Good too.

100 Pump control device 1 Engine (internal combustion engine)
10 Twin drive pump 11 Housing 11b Inlet port 11c Outlet port 12 Drive shaft (shaft)
13 Rotor (first rotating body)
14 Vane 15 Cam ring (second rotating body)
16 First side plate 16a Suction port 16b Suction port 17 Second side plate 18 Cylinder 20 Motor 30 Controller (control unit)
60 Current sensor (current detector)

Claims (4)

A pump control device comprising: a pump section that pressurizes and discharges fluid; a motor that drives the pump section; a control section that controls rotation of the motor; and a current detection section that detects a current flowing through the motor. And,
The pump section is
a shaft through which power from the internal combustion engine is transmitted;
a first rotating body that rotates together with the shaft around the rotation axis of the shaft by power from the internal combustion engine;
a second rotating body that accommodates the first rotating body and defines a pump chamber therein, and is rotatably provided by power from the motor;
a pair of side plates disposed on both sides of the second rotating body in the direction of the rotational axis of the shaft;
a suction port provided on one of the pair of side plates for sucking oil;
a discharge port provided on the other of the pair of side plates and configured to discharge oil;
a cylinder in which the second rotating body and the pair of side plates are fixed, and which rotates together with the second rotating body and the pair of side plates;
a housing that accommodates the cylinder therein;
The control unit includes:
A pump control device characterized in that an abnormality in the pump section is detected based on the current detected by the current detection section. The pump control device according to claim 1,
An MOP mode in which only the first rotating body is rotated by the internal combustion engine, an EOP mode in which only the second rotating body is rotated by the motor, and the first rotation is achieved by relatively rotating the internal combustion engine and the motor. a TDP mode in which the body and the second rotating body are relatively rotated;
The pump control device, wherein the control unit detects the abnormality while executing the EOP mode or the TDP mode. The pump control device according to claim 1 or 2,
The pump control device is characterized in that the control unit operates the motor and detects the abnormality when the motor is not operating for a predetermined period of time. A pump control device comprising: a pump section that pressurizes and discharges fluid; a motor that drives the pump section; a control section that controls rotation of the motor; and a current detection section that detects a current flowing through the motor. A pump control method for controlling a
The pump section is
a shaft through which power from the internal combustion engine is transmitted;
a first rotating body that rotates together with the shaft around the rotation axis of the shaft by power from the internal combustion engine;
a second rotating body that accommodates the first rotating body and defines a pump chamber therein, and is rotatably provided by power from the motor;
a pair of side plates disposed on both sides of the second rotating body in the direction of the rotational axis of the shaft;
a suction port provided on one of the pair of side plates for sucking oil;
a discharge port provided on the other of the pair of side plates and configured to discharge oil;
a cylinder in which the second rotating body and the pair of side plates are fixed, and which rotates together with the second rotating body and the pair of side plates;
a housing that accommodates the cylinder therein;
A pump control method, comprising detecting an abnormality in the pump section based on the current detected by the current detection section.

Images