JP2013011327A - Method of controlling oil pump for vehicular transmission and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of controlling an oil pump and a device therefor that improve fuel efficiency and miniaturize an electrically-operated oil pump to be more economical.SOLUTION: The method for controlling an oil pump for a vehicular transmission 50, including a mechanical oil pump 60 that is driven by an engine, the electrically-operated oil pump 70 that is driven by a motor, and a controller 30 that controls shifting of the mechanical oil pump 60 and the electrically-operated oil pump 70, has a first step of driving the mechanical oil pump 60 within a predetermined time just after an engine 40 is started in response to a command signal from the controller 30 and a second step of shifting the system into the electrically-operated oil pump 70 after a predetermined time lapses and when a low output less than the capacity of the electrically-operated oil pump 70 is requested in response to a command signal from the controller 30, and shifting the system into the mechanical oil pump 60 when a high output more than the capacity of the electrically-operated oil pump 70 is requested in response to a command signal from the controller 30, is provided.

Description

  The present invention relates to a control method and an apparatus for an oil pump for a transmission for a vehicle.

  As an existing technology, an automatic transmission having an energy regeneration mechanism that supplies an excess flow of an engine-driven oil pump to an electric motor oil pump and operates the electric motor as a generator when the engine speed is higher than a predetermined number of revolutions. (For example, refer to Patent Document 1).

  Further, in the automatic transmission, the oil temperature is detected by a temperature sensor, and if the detected oil temperature T is lower than the set value T1, the oil pump is mechanically driven. There is one that drives an oil pump by a motor (for example, see Patent Document 2).

  In addition, when switching from an engine-driven oil pump to a motor-driven oil pump, there is a type in which the motor-driven oil pump is driven before the engine-driven oil pump is stopped to increase its hydraulic pressure (see, for example, Patent Document 3). .

  In addition, an oil pump control means for predicting a high load state of the electric oil pump and controlling an operating state of the mechanical oil pump is provided, and hydraulic pressure is supplied by the mechanical oil pump before the electric oil pump becomes a high load state. Some are supplied (see, for example, Patent Document 4).

JP 2009-192034 A JP 2008-208967 A JP 2007-2933 A JP 2009-8157 A

  However, the oil pump control device of Patent Document 1 has a problem that fuel efficiency deteriorates because an engine-driven oil pump that is suitable for high output and has a large engine output loss always operates with priority.

  In the oil pump control device of Patent Document 2, since the electric oil pump is driven alone depending on the detected oil temperature, the electric oil pump is designed to increase the output in response to the high hydraulic pressure requirement at the time of gear shifting. There is a problem that the pump becomes large and expensive.

  In the oil pump control device of Patent Document 3, since the engine-driven oil pump always operates with priority, there is a problem that fuel consumption deteriorates.

  In the oil pump control device disclosed in Patent Document 4, an electric oil pump that has a small engine output loss but is not suitable for high output always operates with priority, so the electric oil pump is increased in size and priced to ensure durability. There is a problem to do.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an oil pump control device that improves fuel efficiency as compared with the prior art, and is smaller and less expensive than an electric oil pump.

  According to a first aspect of the present invention, there is provided a mechanical oil pump using an engine as a drive source, an electric oil pump using a motor as a drive source, and switching between the mechanical oil pump and the electric oil pump. A transmission oil pump control method comprising: a control device for controlling the transmission, wherein the mechanical oil pump is driven within a predetermined time immediately after starting the engine in response to an engine start signal entered in the control device. In response to a request signal for changing the amount of oil supplied to the transmission that has entered the control device in one step, the electric oil is output after a predetermined time has elapsed from the start of the engine and when a low output is required that is less than the capacity of the electric oil pump. Switch to the pump, after a predetermined time has elapsed since the start of the engine, and when a high output request exceeding the capacity of the electric oil pump is required A second step of switching to the mechanical oil pump, a transmission oil pump control method having.

  According to a second aspect of the present invention, there is provided a transmission oil pump control method according to claim 1, wherein after the second step, at the time of a deceleration request or a braking request from the control device, the electric type A transmission oil pump control method comprising a third step of stopping the oil pump and driving the mechanical oil pump.

  The third problem-solving means of the present invention is the transmission oil pump control method according to claim 1 or 2, wherein the mechanical oil pump or the electric oil pump is used after the second step. A transmission oil pump control method comprising: a fourth step of stopping the electric oil pump or the mechanical oil pump that cannot exhibit a predetermined capacity when either one is unable to exhibit a predetermined capacity. is there.

  A fourth problem solving means of the present invention is the transmission oil pump control method according to any one of claims 1 to 3, wherein the idling is stopped after the second step and from the control device. When requested, the transmission oil pump control method includes a fifth step of stopping the mechanical oil pump and driving the electric oil pump.

According to a fifth aspect of the present invention, there is provided a mechanical oil pump having an engine as a drive source,
A vehicle transmission control device comprising: an electric oil pump using a motor as a drive source; and a control device that controls switching between the mechanical oil pump and the electric oil pump. The engine oil pump is driven within a predetermined time immediately after starting the engine in response to the entered engine start signal, and the request signal for changing the oil supply amount to the transmission that has entered the control device is received. When a low output request less than the capacity of the electric oil pump is required after a lapse of a predetermined time, it is switched to the electric oil pump, and after a predetermined time has elapsed since the start of the engine and when a high output request exceeding the capacity of the electric oil pump is required It is comprised from the oil pump control apparatus for transmissions which switches to the said mechanical oil pump.

  According to the transmission oil pump control method of the present invention, the engine is transmitted to the entire transmission quickly by driving a mechanical oil pump suitable for high output within a predetermined time immediately after the engine is started after receiving the engine start signal. I can do it. When the required output from the vehicle control device is less than the capacity of the electric oil pump, the mechanical oil pump is stopped and the electric oil pump is driven, so that the fuel efficiency of the vehicle can be improved as compared with the conventional case. Conversely, when the required output from the vehicle control device exceeds the capacity of the electric oil pump, an electric oil that is suitable for high output and driven by a mechanical oil pump with large engine output loss and suitable for low output and low engine output loss. Since the pump is stopped, the electric oil pump can be made smaller and less expensive than before. When the signal that the key position is the engine stop position is received, the transmission oil pump control device is also stopped, so that standby power can be reduced and the vehicle can be further energy-saving.

  In addition, the electric oil pump is stopped after a predetermined period of time has elapsed since the engine started and when a deceleration request or braking is requested from the vehicle, so that the fuel efficiency of the vehicle can be further improved and the mechanical oil pump The engine brake can be applied more effectively than before.

  In addition, when a predetermined time has elapsed since the engine was started and when either the electric oil pump or the mechanical oil pump is in a state in which the predetermined capacity cannot be exhibited, a warning is issued to the user, The electric oil pump or the mechanical oil pump that cannot perform the predetermined capacity is stopped, and the electric oil pump or the mechanical oil pump that exhibits the predetermined capacity is driven to supply oil to the transmission. You can evacuate to the nearest maintenance factory while sending it.

  In addition, the engine restarts to stop the mechanical oil pump after a predetermined time has elapsed since the engine was started and when idling is stopped, to further improve the fuel consumption of the vehicle and to drive the electric oil pump. Occasional vibration feeling and oil re-feed delay due to resumption of oil delivery to the transmission can be prevented.

  In the transmission oil pump control device of the present invention, an engine start signal is received, and a mechanical oil pump suitable for high output is driven within a predetermined time immediately after the engine is started, so that the oil is quickly distributed throughout the transmission. I can do it. When the required output from the vehicle control device is less than the capacity of the electric oil pump, the mechanical oil pump is stopped and the electric oil pump is driven, so that the fuel efficiency of the vehicle can be improved as compared with the conventional case. Conversely, if the required output from the vehicle control device exceeds the capacity of the electric oil pump, an electric oil pump that is suitable for high output and driven by a mechanical oil pump with large engine output loss is small but the engine output loss is small but not suitable for high output. Since the oil pump is stopped, the electric oil pump can be made smaller and less expensive than before.

Block diagram of vehicle control device Flow chart of transmission oil pump control The flowchart which shows the detail of step S1 which performs engine drive time determination and a process Flow chart showing details of step S2 for request output and processing Flowchart showing details of step S3 for determining and processing during deceleration / braking Flowchart showing details of step S4 for performing abnormality determination and processing of the electric oil pump and the mechanical oil pump Flowchart showing details of step S5 for determining and processing during idling

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram of the vehicle control device 5. The vehicle control device 5 is provided in the vehicle 1, and includes an engine control device 10 for controlling the engine 40, a transmission for controlling the vehicle transmission 50 and controlling the mechanical oil pump 60 and the electric oil pump 70. Vehicle transmission control device 20 having an oil pump control device 30 (control device).

  The engine control device 10, the vehicle transmission control device 20, and the transmission oil pump control device 30 can be integrated and controlled in the vehicle control device 5. Further, the engine control device 10 and the vehicle transmission control device 20 can be integrated with the transmission oil pump control device 30 and controlled. In addition, the engine control device 10 can be integrated and controlled with the vehicle transmission control device 20.

  FIG. 2 is a flowchart of the oil pump control S by the transmission oil pump control device 30. The oil pump control S includes a start step S0 for detecting that the user has set a key at the start position of the engine 40, a first step S1 for determining and processing the drive time of the engine 40, and a required output determination and processing. A second step S2 for performing the determination, a third step S3 for determining and processing during deceleration / braking, a fourth step S4 for performing abnormality determination and processing of the electric oil pump 70 and the mechanical oil pump 60, and a determination during idling. And a fifth step S5 for performing processing, a stop determination step S6a for the engine 40, a stop step S6b for the mechanical oil pump 60, a stop step S6c for the electric oil pump 70, and a return step S6d. Yes.

  FIG. 3 is a flowchart showing details of the first step S1 for determining and processing the driving time of the engine 40. The first step S1 includes a start determination step S1a for the engine 40, a drive control step S1b for the mechanical oil pump 60, and a drive time determination step S1c for the engine 40.

  FIG. 4 is a flowchart showing details of the second step S2 in which request output and processing are performed. The second step S2 includes a required output determination step S2a, a stop step S2b of the mechanical oil pump 60, a drive step S2c of the electric oil pump 70, a drive step S2e of the mechanical oil pump 60, and an electric oil pump 70 stop steps S2f.

  FIG. 5 is a flowchart showing details of the third step S3 for performing determination and processing during deceleration / braking. The third step S3 includes a deceleration / braking determination step S3a, a stop step S3b of the mechanical oil pump 60, a drive step S3c of the electric oil pump 70, a drive step S3e of the mechanical oil pump 60, and an electric oil And stop step S3f of the pump 70.

  FIG. 6 is a flowchart showing details of the fourth step S4 for performing abnormality determination and processing of the electric oil pump 70 and the mechanical oil pump 60. The fourth step S4 includes an abnormality determination step S4a for the electric oil pump 70, a mechanical oil stop step S4b, a drive step S4c for the electric oil pump 70, an abnormality determination step S4d for the electric oil pump 70, The drive step S4e of the hydraulic oil pump 60, the stop step S4f of the electric oil pump 70, the stop step S4g of the mechanical oil pump 60, and the stop step S4h of the electric oil pump 70 are included.

  FIG. 7 is a flowchart showing details of the fifth step S5 for performing the determination and processing during idling. The fifth step S5 includes a determination step S5a during idling, a stop step S5b of the mechanical oil pump 60, a drive step S5c of the electric oil pump 70, a stop step S5e of the mechanical oil pump 60, and an electric oil pump. 70 drive steps S5f.

  The operation of the transmission oil pump control method S of the present invention will be described below.

(Start step S0)
If it is detected via the vehicle control device 5 that the user has set the key to the starting position of the engine 40, the transmission oil pump control device 30 proceeds to the next step S1. Further, the transmission oil pump control device 30 confirms that the required output to the mechanical oil pump 60 or the electric oil pump 70 is input, and if not, outputs an abnormal signal to the vehicle control device 5. Send to.

(First step S1)
When receiving a start signal of the engine 40 from the engine control device 10 via the vehicle control device 5, the transmission oil pump control device 30 performs the mechanical oil pump 60 within a predetermined time from the start of the engine 40. Drive. If there is no start signal for the engine 40, the process returns to the start step S0 for detecting whether the user has set the key to the start position of the engine 40 via the return S6d. After a predetermined time has elapsed since the start of the engine 40, the process proceeds to the next step S2.

(Second step S2)
When the required output signal from the vehicle control device 5 exceeds the capacity of the electric oil pump 70, the transmission oil pump control device 30 drives the mechanical oil pump 60 to output the required output from the vehicle control device 5. When the signal is equal to or less than the capacity of the electric oil pump 70, the transmission oil pump control device 30 drives the electric oil pump 70.

(Third step S3)
When receiving a signal indicating that the vehicle 1 is decelerating / braking from the vehicle control device 5, the transmission oil pump control device 30 drives the mechanical oil pump 60 and stops the electric oil pump 70.

(Fourth step S4)
When receiving an abnormal signal from the vehicle control device 5 that the electric oil pump 70 is not delivering oil, the transmission oil pump control device 30 drives the mechanical oil pump 60 to drive the electric oil. The pump 70 is stopped. Further, a signal indicating that the electric oil pump 70 is abnormal is transmitted to the vehicle control device 5. On the other hand, when an abnormal signal is received from the vehicle control device 5 that the mechanical oil pump 60 is not delivering oil, the transmission oil pump control device 30 drives the electric oil pump 70 to The oil pump 60 is stopped. Furthermore, a signal indicating that the mechanical oil pump 60 is abnormal is transmitted to the vehicle control device 5.

(5th step S5)
When a signal indicating that the vehicle 1 is idling is received from the vehicle control device 5, the transmission oil pump control device 30 drives the electric oil pump 70 and stops the mechanical oil pump 60.

(6th step S6)
When receiving a signal from the vehicle control device 5 that the key position is the stop position of the engine 40, the transmission oil pump control device 30 stops both the mechanical oil pump 60 and the electric oil pump 70. The transmission oil pump control device 30 is also stopped. Thereafter, the return step S6d returns to the start step S0, and the engine 40 enters a start input standby state.

  In this embodiment, the transmission oil pump control device 30 receives the various signals from the vehicle control device 5 and performs the operations from start step S0 to step S6. The transmission control device 20 or the vehicle control device 5 may be configured to perform these operations.

  The effects of the transmission oil pump control method of the present invention will be described below.

  By receiving the start signal of the engine 40 and driving the mechanical oil pump 60 suitable for high output within a predetermined time immediately after the start of the engine 40, the oil can be quickly distributed to the entire vehicle transmission 50. When the required output from the vehicle control device 5 is less than the capacity of the electric oil pump 70, the electric oil pump 70 is driven and the mechanical oil pump 60 is stopped. I can do it. Conversely, when the required output from the vehicle control device 5 exceeds the capacity of the electric oil pump 70, the mechanical oil pump 60 that is suitable for high output and has a large output loss of the engine 40 is driven to be suitable for low output. Since the electric oil pump 70 with a small output loss is stopped, the electric oil pump 70 can be made smaller and less expensive than the conventional one. In addition, when the signal that the key position is the stop position of the engine 40 is received, the transmission oil pump control device 30 is also stopped, thereby reducing standby power and further saving the vehicle 1. I can do it.

  Further, when the engine 40 is started and a predetermined time has elapsed and when a deceleration request or a braking request from the vehicle 1 is requested, the electric oil pump 70 is stopped, so that the fuel consumption of the vehicle 1 can be further improved. Since the mechanical oil pump 60 is driven, the engine brake can be applied more strongly than before.

  Further, a warning is given to the user when the engine 40 has been started and a predetermined time has elapsed, and either the electric oil pump 70 or the mechanical oil pump 60 is in a state in which the predetermined capacity cannot be exhibited. And the electric oil pump 70 or the mechanical oil pump 60 that exhibits a predetermined capacity is driven, and the electric oil pump 70 or the mechanical oil pump 60 that cannot exhibit the predetermined capacity is stopped. The vehicle can be evacuated to the nearest maintenance factory while the oil is sent to the vehicle transmission 50.

  Further, when the engine 40 is started and the idling is stopped after a predetermined time has elapsed, the electric oil pump 70 is driven, the fuel consumption of the vehicle 1 can be further improved, and the mechanical oil pump 60 is stopped. When the engine 40 is restarted, it is possible to prevent a vibration feeling failure and an oil redelivery delay due to resumption of oil delivery to the vehicle transmission 50.

  Further, the transmission oil pump control device 30 of the present invention receives the start signal of the engine 40, and drives the mechanical oil pump 60 suitable for high output within a predetermined time immediately after the start of the engine 40, thereby Oil can be spread quickly throughout the transmission 50. When the required output from the vehicle control device 5 is less than the capacity of the electric oil pump 70, the electric oil pump 70 is driven and the mechanical oil pump 60 is stopped. I can do it. On the other hand, when the required output from the vehicle control device 5 exceeds the capacity of the electric oil pump 70, the mechanical oil pump 60 with a large output loss of the engine 40 suitable for high output is driven and the output loss of the engine 40 is small. However, since the electric oil pump 70 which is not suitable for high output is stopped, the electric oil pump 70 can be made smaller and less expensive than the conventional one.

DESCRIPTION OF SYMBOLS 1 Vehicle control apparatus 10 Engine control apparatus 20 Vehicle transmission control apparatus 30 Oil pump control apparatus (control apparatus) for transmission
30 Control Device 40 Engine 50 Vehicle Transmission 60 Mechanical Oil Pump 70 Electric Oil Pump S Transmission Oil Pump Control Method S0 Start Step S1 First Step S2 Second Step S3 Third Step S4 Fourth Step S5 Fifth Step S6 6th step

Claims (5)

A mechanical oil pump driven by an engine;
An electric oil pump driven by a motor;
A control device for controlling switching between the mechanical oil pump and the electric oil pump;
A transmission oil pump control method comprising:
A first step of driving the mechanical oil pump within a predetermined time immediately after starting the engine in response to an engine starting signal entering the control device;
In response to a request signal for changing the amount of oil supplied to the transmission that has entered the control device, when a low output request less than the capacity of the electric oil pump is required after a predetermined time has elapsed since the start of the engine, the electric oil pump is switched to,
A second step of switching to the mechanical oil pump after a predetermined time has elapsed since the start of the engine and at the time of a high output request exceeding the capacity of the electric oil pump;
An oil pump control method for a transmission comprising: In the transmission oil pump control method according to claim 1,
At the time of deceleration request or braking request from the control device after the second step,
A third step of stopping the electric oil pump and driving the mechanical oil pump;
A method for controlling an oil pump for a transmission. In the transmission oil pump control method according to claim 1 or 2,
When the second step and either the mechanical oil pump or the electric oil pump are in a state where a predetermined capacity cannot be exhibited,
A fourth step of stopping the electric oil pump or the mechanical oil pump that cannot exhibit a predetermined capacity;
A method for controlling an oil pump for a transmission. The transmission oil pump control method according to any one of claims 1 to 3,
After the second step and at the time of idling stop request from the control device,
A fifth step of stopping the mechanical oil pump and driving the electric oil pump;
A method for controlling an oil pump for a transmission. A mechanical oil pump driven by an engine;
An electric oil pump driven by a motor;
A control device for controlling switching between the mechanical oil pump and the electric oil pump;
A vehicle transmission control device comprising:
In response to the engine start signal entered in the control device, the mechanical oil pump is driven within a predetermined time immediately after the engine start,
In response to a request signal for changing the amount of oil supplied to the transmission that has entered the control device, when a low output request less than the capacity of the electric oil pump is required after a predetermined time has elapsed since the start of the engine, the electric oil pump is switched to,
Switch to the mechanical oil pump after a predetermined time has elapsed since the start of the engine and when a high output request exceeding the capacity of the electric oil pump is required,
Transmission oil pump control device.

Images