WO2022153688A1 - 変速機、変速機の制御方法及びプログラム - Google Patents
変速機、変速機の制御方法及びプログラム Download PDFInfo
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- WO2022153688A1 WO2022153688A1 PCT/JP2021/043395 JP2021043395W WO2022153688A1 WO 2022153688 A1 WO2022153688 A1 WO 2022153688A1 JP 2021043395 W JP2021043395 W JP 2021043395W WO 2022153688 A1 WO2022153688 A1 WO 2022153688A1
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- Prior art keywords
- pressure
- target
- pulley
- line
- line pressure
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 88
- 238000010586 diagram Methods 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 6
- 238000013016 damping Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/68—Inputs being a function of gearing status
- F16H59/72—Inputs being a function of gearing status dependent on oil characteristics, e.g. temperature, viscosity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
- F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
Definitions
- the present invention relates to a transmission, a transmission control method and a program.
- Patent Document 1 discloses a transmission that suppresses hydraulic pressure variation and reduces an excess of line pressure by providing a line pressure sensor.
- the present invention has been made in view of such a problem, and an object of the present invention is to provide a transmission, a transmission control method, and a program capable of further reducing the excess line pressure.
- a primary pulley, a secondary pulley, a transmission member wound around the primary pulley and the secondary pulley, an oil pump for supplying oil, and oil supplied from the oil pump are used.
- a hydraulic control circuit that regulates the line pressure, which is the original pressure of the primary pulley pressure supplied to the primary pulley and the secondary pulley pressure supplied to the secondary pulley, a line pressure detecting unit that detects the line pressure, and the above.
- a controller for controlling a hydraulic control circuit is provided, and the controller selects the higher of the target value of the primary pulley pressure and the target value of the secondary pulley pressure as the target pulley pressure, and sets the target differential pressure as the oil temperature.
- the target line pressure which is the target value of the line pressure, is set to be the total pressure of the target pulley pressure and the target differential pressure, and the detected line pressure becomes the target line pressure.
- a transmission that controls the hydraulic control circuit so that the pressure is adjusted is provided.
- a shift control method comprising a hydraulic control circuit for adjusting the primary pulley pressure supplied to the primary pulley and the line pressure which is the original pressure of the secondary pulley pressure supplied to the secondary pulley.
- the line pressure detection step for detecting the pressure, the higher of the target value of the primary pulley pressure and the target value of the secondary pulley pressure is selected as the target pulley pressure, and the target differential pressure is variably set according to the oil temperature.
- the target line pressure which is the target value of the line pressure, is set to be the total pressure of the target pulley pressure and the target differential pressure, and the detected line pressure is adjusted to the target line pressure.
- a control method for a transmission including a control step for controlling the hydraulic control circuit is provided.
- a computer that controls a transmission is feasible, comprising a hydraulic control circuit that regulates the primary pulley pressure supplied to the primary pulley and the line pressure which is the original pressure of the secondary pulley pressure supplied to the secondary pulley.
- the line pressure detection procedure for detecting the line pressure, the higher of the target value of the primary pulley pressure and the target value of the secondary pulley pressure is selected as the target pulley pressure, and the target differential pressure is oil.
- the target line pressure which is a target value of the line pressure, is set to be the total pressure of the target pulley pressure and the target differential pressure, and the detected line pressure is the target line pressure.
- a control procedure for controlling the hydraulic control circuit so as to regulate the pressure and a program for causing the computer to execute the pressure are provided.
- the excess line pressure can be further reduced.
- FIG. 1 is a schematic configuration diagram of a vehicle.
- FIG. 2 is a schematic configuration diagram of a hydraulic control circuit.
- FIG. 3 is a configuration block diagram showing a transmission controller and a main configuration connected to the transmission controller.
- FIG. 4 is a flowchart showing a control process of the hydraulic control circuit.
- FIG. 5 is a table for setting a target pulley pressure.
- FIG. 6 is an explanatory diagram for explaining the target differential pressure.
- FIG. 7 is a table for setting the target differential pressure.
- FIG. 1 is a schematic configuration diagram of the vehicle.
- the vehicle is equipped with an engine ENG, a torque converter TC, a forward / backward switching mechanism SWM, and a variator VA.
- the transmission TM as an operating machine is a belt continuously variable transmission having a torque converter TC, a forward / backward switching mechanism SWM, and a variator VA.
- the engine ENG constitutes the drive source of the vehicle.
- the power of the engine ENG is transmitted to the drive wheels DW via the torque converter TC, the forward / backward switching mechanism SWM, and the variator VA.
- the torque converter TC, the forward / backward switching mechanism SWM, and the variator VA are provided in the power transmission path connecting the engine ENG and the drive wheel DW.
- the torque converter TC transmits power via a fluid.
- the power transmission efficiency is enhanced by engaging the lockup clutch LU.
- the forward / backward switching mechanism SWM is provided in the power transmission path connecting the engine ENG and the variator VA.
- the forward / backward switching mechanism SWM switches the forward / backward movement of the vehicle by switching the rotation direction of the input rotation.
- the forward / backward switching mechanism SWM includes a forward clutch FWD / C that is engaged when the forward range is selected, and a reverse brake REV / B that is engaged when the reverse range is selected.
- the transmission TM is in the neutral state, that is, in the power cutoff state.
- the variator VA constitutes a belt continuously variable transmission mechanism having a primary pulley PRI, a secondary pulley SEC, and a belt BLT as a transmission member wound around the primary pulley PRI and the secondary pulley SEC.
- the primary pulley pressure Ppri which is the hydraulic pressure of the primary pulley PRI
- the secondary pulley pressure Psec which is the hydraulic pressure of the secondary pulley SEC
- the transmission TM is further composed of a mechanical oil pump MP, an electric oil pump EP, and an electric motor M.
- the mechanical oil pump MP pumps (supplies) oil to the hydraulic control circuit 1.
- a check valve 25 is provided in the flow path that connects the mechanical oil pump MP and the hydraulic control circuit 1.
- the mechanical oil pump MP is driven by the power of the engine ENG.
- the electric oil pump EP pumps (supplies) oil to the hydraulic control circuit 1 together with the mechanical oil pump MP or independently.
- a check valve 26 is provided in the flow path that connects the electric oil pump EP and the hydraulic control circuit 1.
- the electric oil pump EP is provided as an auxiliary to the mechanical oil pump MP.
- the electric motor M drives the electric oil pump EP. It may be understood that the electric oil pump EP includes the electric motor M.
- the transmission TM is configured to further include a hydraulic control circuit 1 and a transmission controller 2.
- the hydraulic control circuit 1 is composed of a plurality of flow paths and a plurality of hydraulic control valves, and regulates the oil supplied from the mechanical oil pump MP and the electric oil pump EP and supplies the oil to each part of the transmission TM.
- the transmission controller 2 is a controller for controlling the transmission TM, and various sensors (specifically, a primary pulley pressure detection sensor 27, a secondary pulley pressure detection sensor 28, a line pressure detection sensor 29, and an oil temperature detection sensor 30).
- the electric motor M that drives the hydraulic control circuit 1 and the electric oil pump EP is controlled based on the signals output from (see FIGS. 2 and 3) and the like.
- the transmission controller 2 is composed of a CPU as a computer, but is not limited to this, and may be composed of, for example, a plurality of microcomputers. The details of the transmission controller 2 will be described later.
- the hydraulic pressure control circuit 1 controls the hydraulic pressure of the lockup clutch LU, the forward clutch FWD / C, the reverse brake REV / B, the primary pulley PRI, the secondary pulley SEC, etc., based on the command from the transmission controller 2.
- FIG. 2 is a schematic configuration diagram of the hydraulic control circuit 1.
- the hydraulic control circuit 1 includes a pressure regulator valve 11, a primary regulator valve 12, a secondary regulator valve 13, a clutch regulator valve 14, a torcon regulator valve 15, a lockup regulator valve 16, and a second.
- Pilot valve 17 line pressure solenoid valve 18, primary solenoid valve 19, secondary solenoid valve 20, clutch pressure solenoid valve 21, second pilot valve 22, lockup solenoid valve 23, third pilot valve It has 24 and.
- the pressure regulator valve 11 regulates the discharge oil of at least one of the mechanical oil pump MP and the electric oil pump EP to the line pressure PL.
- the line pressure PL is the original pressure of the pulley pressure described later.
- the dashed line pointing to the line pressure PL means pointing to the oil pressure, not the oil passage.
- the pressure regulator valve 11 adjusts the pressure while draining a part of the oil discharged from the oil pump.
- the oil adjusted to the line pressure PL is supplied to the primary regulator valve 12, the secondary regulator valve 13, and the first pilot valve 17.
- the primary regulator valve 12 and the secondary regulator valve 13 are pulley pressure control valves, and control the pulley pressure by adjusting the oil adjusted to the line pressure PL to the pulley pressure.
- the pulley pressure is the primary pulley pressure Ppri in the case of the primary regulator valve 12, and the secondary pulley pressure Psec in the case of the secondary regulator valve 13.
- the oil drained from the pressure regulator valve 11 is supplied to the clutch regulator valve 14.
- the clutch regulator valve 14 adjusts the oil drained from the pressure regulator valve 11 to the clutch pressure.
- the oil adjusted to the clutch pressure is selectively supplied to either the forward clutch FWD / C or the reverse brake REV / B.
- the clutch regulator valve 14 adjusts the pressure while draining a part of the oil.
- Oil drained from the clutch regulator valve 14 is supplied to the torque converter regulator valve 15.
- the torque converter regulator valve 15 regulates the oil drained from the pressure regulator valve 11 to the converter pressure of the torque converter TC.
- the torque converter regulator valve 15 adjusts the pressure while draining a part of the oil, and the drained oil is supplied to the lubrication system of the transmission TM.
- the oil adjusted to the converter pressure is supplied to the torque converter TC and the lockup regulator valve 16.
- the lockup regulator valve 16 regulates the oil regulated by the converter pressure to the lockup pressure.
- the lockup clutch LU is lockup controlled by the lockup differential pressure, which is the differential pressure between the converter pressure and the lockup pressure.
- the oil adjusted to the lockup pressure is supplied to the lockup clutch LU.
- the pressure regulator valve 11 adjusts the pressure based on the signal pressure generated by the line pressure solenoid valve 18. The same applies to the primary regulator valve 12, the primary solenoid valve 19, the secondary regulator valve 13, the secondary solenoid valve 20, the clutch regulator valve 14, the clutch pressure solenoid valve 21, the lockup regulator valve 16, and the lockup solenoid valve 23.
- the first pilot pressure P1 is introduced as the original pressure in each of the line pressure solenoid valve 18, the primary solenoid valve 19, the secondary solenoid valve 20, and the clutch pressure solenoid valve 21.
- the first pilot pressure P1 is generated by the first pilot valve 17 with the line pressure PL as the original pressure.
- the first pilot pressure P1 is also introduced into the second pilot valve 22.
- the second pilot valve 22 generates a second pilot pressure P2 with the first pilot pressure P1 as the original pressure.
- the second pilot pressure P2 is set to be equal to or higher than the lower limit of the set range of the line pressure PL.
- the second pilot pressure P2 is preset in consideration of the controllability of the lockup clutch LU.
- the second pilot pressure P2 is introduced into the lockup solenoid valve 23 and the third pilot valve 24.
- the lockup solenoid valve 23 generates a lockup signal pressure using the second pilot pressure P2 as the original pressure.
- the lockup signal pressure is a signal pressure generated by the lockup solenoid valve 23 to control the lockup pressure of the lockup clutch LU of the torque converter TC.
- the third pilot valve 24 generates a third pilot pressure P3 with the second pilot pressure P2 as the original pressure.
- the third pilot pressure P3 is set lower than the lower limit of the set range of the line pressure PL.
- the third pilot pressure P3 is preset in consideration of the damping property of the primary regulator valve 12 and the secondary regulator valve 13.
- the third pilot pressure P3 is introduced into the primary regulator valve 12 and the secondary regulator valve 13 as a damping pressure.
- the third pilot pressure P3 introduced as the damping pressure is introduced into the primary regulator valve 12 so as to face the primary signal pressure.
- the primary signal pressure is the signal pressure generated by the primary solenoid valve 19 to control the primary pulley pressure Ppri.
- the third pilot pressure P3 introduced as the damping pressure is introduced into the secondary regulator valve 13 so as to face the secondary signal pressure.
- the secondary signal pressure is a signal pressure generated by the secondary solenoid valve 20 to control the secondary pulley pressure Psec.
- the hydraulic control circuit 1 includes a primary pulley pressure detection sensor 27 as a primary pulley pressure detection unit that detects the primary pulley pressure Ppri of the primary pulley PRI, and a secondary pulley pressure detection that detects the secondary pulley pressure Psec of the secondary pulley SEC.
- the secondary pulley pressure detection sensor 28 as a unit, the line pressure detection sensor 29 as a line pressure detection unit that detects the line pressure PL, and the oil temperature T of the oil supplied from the mechanical oil pump MP or the electric oil pump EP are detected.
- An oil temperature detection sensor 30 is provided as an oil temperature detection unit.
- FIG. 3 is a configuration block diagram showing a transmission controller 2 and a main configuration connected to the transmission controller 2.
- the transmission controller 2 includes an input interface 31, an output interface 32, a storage device 33, an electric motor control device 34, and a hydraulic control circuit control device 35 (hereinafter, simply circuit control) that are electrically connected to each other. (Refered to as device 35) and.
- the input interface 31 has a secondary pulley pressure detection that detects an output signal from the primary pulley pressure detection sensor 27 that detects the primary pulley pressure Ppri supplied to the primary pulley PRI and a secondary pulley pressure Psec that is supplied to the secondary pulley SEC.
- the output signal from 30 is input.
- the motor control command generated by the processing of the electric motor control device 34 and the circuit control command generated by the processing of the circuit control device 35 are output to the electric motor M and the hydraulic control circuit 1 via the output interface 32, respectively.
- the storage device 33 temporarily stores parameters included in output signals from various sensors (primary pulley pressure detection sensor 27, secondary pulley pressure detection sensor 28, line pressure detection sensor 29, and oil temperature detection sensor 30). It is a memory. Further, the storage device 33 stores a pulley pressure setting table and a target differential pressure setting table, which will be described later.
- the storage device 33 stores the processing program and the algorithm program executed by the electric motor control device 34 and the circuit control device 35.
- the storage device 33 is built in the transmission controller 2, but is not limited to this, and may be provided separately from the transmission controller 2, for example.
- the electric motor control device 34 generates a motor control command based on output signals output from various sensors and the like, and outputs the generated motor control command to the electric motor M via the output interface 32.
- the circuit control device 35 generates a circuit control command based on output signals output from various sensors and the like, and outputs the generated circuit control command to the hydraulic control circuit 1 via the output interface 32.
- the circuit control device 35 includes a target pulley pressure setting module 351 as a target pulley pressure setting unit, a target pulley pressure selection module 352 as a target pulley pressure selection unit, and a target differential pressure setting module 353 as a target differential pressure setting unit. It has a target line pressure setting module 354 as a target line pressure setting unit and a circuit control command generation module 355 as a circuit control command generation unit.
- the details of the target pulley pressure setting module 351, the target pulley pressure selection module 352, the target differential pressure setting module 353, the target line pressure setting module 354, and the circuit control command generation module 355 will be described later in the control process of the hydraulic control circuit 1. do.
- FIG. 4 is a flowchart showing the control process of the hydraulic control circuit 1.
- FIG. 5 is a table for setting the target pulley pressure.
- FIG. 6 is an explanatory diagram for explaining the target differential pressure ⁇ P.
- FIG. 7 is a table for setting the target differential pressure ⁇ P and showing the change in the target differential pressure ⁇ P depending on the oil temperature region.
- step S1 various sensors detect various parameters.
- the primary pulley pressure detection sensor 27, the secondary pulley pressure detection sensor 28, the line pressure detection sensor 29, and the oil temperature detection sensor 30 are the primary pulley pressure Ppri, the secondary pulley pressure Psec, the line pressure PL, and the oil of oil, respectively. Detects temperature T.
- the primary pulley pressure detection sensor 27, the secondary pulley pressure detection sensor 28, the line pressure detection sensor 29, and the oil temperature detection sensor 30 shift the detected primary pulley pressure Ppri, secondary pulley pressure Psec, line pressure PL, and oil temperature T.
- the input interface 31 outputs the oil temperature T to the target differential pressure setting module 353, outputs the primary pulley pressure Ppri, the secondary pulley pressure Psec, and the line pressure PL to the circuit control command generation module 355, and proceeds to step S2. ..
- the target pulley pressure setting module 351 of the circuit control device 35 has the target primary pulley pressure tPpri, which is the target value of the primary pulley pressure Ppri, and the secondary pulley pressure Psec, based on the gear ratio of the transmission TM.
- the target secondary pulley pressure tPsec which is the target value, is set.
- the target pulley pressure setting module 351 has a target primary pulley pressure based on the gear ratio of the transmission TM and the pulley pressure setting table (see FIG. 5) stored in the storage device 33. Set tPpri and target secondary pulley pressure tPsec. Then, the target pulley pressure setting module 351 outputs the set target primary pulley pressure tPpri and the target secondary pulley pressure tPsec to the target pulley pressure selection module 352 and the circuit control command generation module 355, and proceeds to step S3.
- step S3 the target pulley pressure selection module 352 selects the higher of the target primary pulley pressure tPpri and the target secondary pulley pressure tPsec output from the target pulley pressure setting module 351 as the target pulley pressure tPP. Then, the target pulley pressure selection module 352 outputs the selected target pulley pressure tPP to the target line pressure setting module 354, and proceeds to step S4.
- step S4 the target differential pressure setting module 353 sets the target differential pressure ⁇ P variably according to the oil temperature T output from the input interface 31.
- the target differential pressure ⁇ P used for setting the target line pressure tPL which will be described later, is variably set according to the oil temperature T.
- the excess of the line pressure tPL can be further reduced.
- the target differential pressure setting module 353 outputs the set target differential pressure ⁇ P to the target line pressure setting module 354, and proceeds to step S5.
- the target differential pressure ⁇ P is the target differential pressure between the target pulley pressure tPP and the target line pressure tPL, and is a pulley pressure detection sensor (specifically, the primary pulley pressure detection sensor 27 or It is composed of the detection variation of the secondary pulley pressure detection sensor 28), the required target differential pressure for suppressing oil vibration, and the detection variation of the line pressure detection sensor 29.
- the detection variation of the line pressure detection sensor 29 greatly affects the setting of the target line pressure tPL.
- the inventor has discovered that the detection variation (that is, detection accuracy) of the line pressure detection sensor 29 changes depending on the oil temperature T of the oil.
- step S4 the target differential pressure setting module 353 sets the target differential pressure ⁇ P by the oil temperature region based on the oil temperature T and the target differential pressure setting table (see FIG. 7) stored in the storage device 33. Set differently.
- the target differential pressure ⁇ P used to set the target differential pressure tPL is set variably depending on the oil temperature region, so that the target line pressure due to the target differential pressure ⁇ P is compared with the case where the target differential pressure ⁇ P is a fixed value. The excess of tPL can be further reduced.
- step S4 in the target differential pressure setting module 353, in the first oil temperature region where the detection variation of the line pressure detection sensor 29 with respect to the oil temperature T is large, the detection variation of the line pressure detection sensor 29 is the first oil.
- the target differential pressure ⁇ P is set larger than that of the second oil temperature region, which is smaller than the temperature region.
- the target differential pressure ⁇ P can be appropriately set according to the change in the detection variation of the line pressure detection sensor 29 due to the different oil temperature regions, so that the excess amount of the target line pressure tPL due to the target differential pressure ⁇ P can be further reduced. Can be made to.
- the target differential pressure setting module 353 has a line pressure in the low oil temperature region LT (see FIG. 7) and the high oil temperature region HT (see FIG. 7), which are the first oil temperature regions.
- the detection variation of the detection sensor 29 is small, and the target differential pressure is larger than the intermediate oil temperature region CT (see FIG. 7) as the second oil temperature region located between the low oil temperature region LT and the high oil temperature region HT.
- Set ⁇ P to a large value.
- the target differential pressure ⁇ P is set large in the low oil temperature region LT and the high oil temperature region HT where the detection variation of the line pressure detection sensor 29 is large, and the intermediate oil temperature region CT where the detection variation of the line pressure detection sensor 29 is small is small. Then, by setting the target differential pressure ⁇ P small, the target differential pressure ⁇ P can be appropriately set according to the change in the detection variation of the line pressure detection sensor 29 in different oil temperature regions. The excess of the line pressure tPL can be further reduced.
- step S4 the target differential pressure setting module 353 sets the target differential pressure in the oil temperature region (for example, the intermediate oil temperature region CT) where the detection variation of the line pressure detection sensor 29 is constant.
- Set ⁇ P to be constant.
- the target differential pressure setting module 353 is set in the oil temperature region CT where the detection variation of the line pressure detection sensor 29 changes (for example, the intermediate oil temperature region CT of the low oil temperature region LT).
- the target differential pressure ⁇ P is set to be different depending on the different oil temperature T. From the viewpoint of further improving the accuracy of the target differential pressure ⁇ P, it is preferable that the target differential pressure setting module 353 sets the target differential pressure ⁇ P to a larger value as the detection variation of the line pressure detection sensor 29 increases.
- the target differential pressure ⁇ P As shown in FIG. 7, regarding the change of the target differential pressure ⁇ P set by the oil temperature region, even when the target line pressure tPL is a high pressure of 2.0 Mpa or more, or the target line pressure tPL is 1. The same tendency can be seen even when the pressure is as low as 5 Mpa or less. That is, the target differential pressure ⁇ P is relatively large in the low oil temperature region LT and the high oil temperature region HT, and the target differential pressure ⁇ P in the intermediate oil temperature region CT located between the low oil temperature region LT and the high oil temperature region HT. Is relatively small. Therefore, the target differential pressure ⁇ P can be effectively reduced in the intermediate oil temperature region CT where the fuel consumption is relatively good.
- step S5 the target line pressure setting module 354 is based on the target pulley pressure tPP output from the target pulley pressure selection module 352 and the target differential pressure ⁇ P output from the target differential pressure setting module 353.
- the target line pressure tPL which is the target value of the line pressure PL, is set.
- step S5 the target line pressure setting module 354 sets the target line pressure tPL to be the total pressure of the target pulley pressure tPP and the target differential pressure ⁇ P. Then, the target line pressure setting module 354 outputs the set target line pressure tPL to the circuit control command generation module 355, and proceeds to step S6.
- step S6 the transmission controller 2 adjusts the detected primary pulley pressure Ppri, secondary pulley pressure Psec, and line pressure PL to the target primary pulley pressure tPpri, target secondary pulley pressure tPsec, and target line pressure tPL, respectively.
- the hydraulic control circuit 1 is controlled so as to be performed.
- the circuit control command generation module 355 includes the primary pulley pressure Ppri, the secondary pulley pressure Psec, and the line pressure PL output from the input interface 31, and the target output from the target pulley pressure setting module 351.
- a circuit control command for controlling the hydraulic control circuit 1 is generated based on the primary pulley pressure tPpri, the target secondary pulley pressure tPsec, and the target line pressure tPL output from the target line pressure setting module 354.
- step S6 in the circuit control command generation module 355, the primary pulley pressure Ppri, the secondary pulley pressure Psec, and the line pressure PL are set to the target primary pulley pressure tPpri, the target secondary pulley pressure tPsec, and the target line pressure tPL, respectively.
- the circuit control command generation module 355 outputs the generated circuit control command to the hydraulic control circuit 1 via the output interface 32.
- the primary pulley pressure Ppri, the secondary pulley pressure Psec, and the line pressure PL are the target primary pulley pressure tPpri and the target secondary pulley pressure, respectively, based on the circuit control command output from the circuit control command generation module 355.
- the pressure is controlled to be adjusted to tPsec and the target line pressure tPL, and the process returns to step S1.
- the transmission TM includes a primary pulley PRI, a secondary pulley SEC, a belt BLT (transmission member) wound around the primary pulley PRI and the secondary pulley SEC, and a mechanical oil pump that supplies oil.
- the oil supplied from the MP or electric oil pump EP (oil pump) and the mechanical oil pump MP or electric oil pump EP (oil pump) is supplied to the primary pulley pressure Ppri and the secondary pulley SEC supplied to the primary pulley PRI.
- a hydraulic control circuit 1 that regulates the line pressure PL, which is the original pressure of the secondary pulley pressure Psec, a line pressure detection sensor 29 (line pressure detection unit) that detects the line pressure PL, and a transmission that controls the hydraulic control circuit 1.
- a controller 2 (controller) is provided, and the transmission controller 2 (controller) selects the higher of the target value of the primary pulley pressure Ppri and the target value of the secondary pulley pressure Psec as the target pulley pressure tPP, and the target difference.
- the pressure ⁇ P is variably set by the oil temperature T
- the target line pressure tPL which is the target value of the line pressure PL
- the target differential pressure ⁇ P is set to be the total pressure of the target pulley pressure tPP and the target differential pressure ⁇ P
- the hydraulic control circuit 1 is controlled so that the PL is adjusted to the target line pressure tPL.
- the control method of the transmission TM supplies oil with a primary pulley PRI, a secondary pulley SEC, a belt BLT (transmission member) wound around the primary pulley PRI and the secondary pulley SEC, and oil.
- the oil supplied from the mechanical oil pump MP or electric oil pump EP (oil pump) and the mechanical oil pump MP or electric oil pump EP (oil pump) is supplied to the primary pulley PRI by the primary pulley pressure Ppri and the secondary pulley SEC.
- This is a control method of a transmission TM including a hydraulic control circuit 1 for adjusting the pressure to the line pressure PL which is the original pressure of the secondary pulley pressure Psec supplied to the power supply, the line pressure detecting step for detecting the line pressure PL, and the primary.
- the higher of the target value of the pulley pressure Ppri and the target value of the secondary pulley pressure Psec is selected as the target pulley pressure tPP, the target differential pressure ⁇ P is variably set by the oil temperature T, and is the target value of the line pressure PL.
- the setting step of setting the target line pressure tPL to be the total pressure of the target pulley pressure tPP and the target differential pressure ⁇ P, and the hydraulic control circuit 1 so that the detected line pressure PL is adjusted to the target line pressure tPL. Includes control steps and controls.
- the program according to the embodiment includes a primary pulley PRI, a secondary pulley SEC, a belt BLT (transmission member) wound around the primary pulley PRI and the secondary pulley SEC, and a mechanical oil pump MP or electric motor for supplying oil.
- the oil pump EP (oil pump) and the oil supplied from the mechanical oil pump MP or the electric oil pump EP (oil pump) are supplied to the primary pulley pressure Ppri supplied to the primary pulley PRI and the secondary pulley supplied to the secondary pulley SEC.
- a setting procedure for setting the target line pressure tPL which is a value, to be the total pressure of the target pulley pressure tPP and the target differential pressure ⁇ P, and hydraulic pressure so that the detected line pressure PL is adjusted to the target line pressure tPL.
- the CPU (computer) is made to execute the control procedure for controlling the control circuit 1.
- the target differential pressure ⁇ P used for setting the target line pressure tPL is variably set by the oil temperature T, so that the target differential pressure ⁇ P is compared with the case where the target differential pressure ⁇ P is a fixed value.
- the excess amount of the target line pressure tPL due to the above can be further reduced.
- the drive torque of the mechanical oil pump MP or the electric oil pump EP can be reduced.
- the transmission controller 2 detects in the first oil temperature region where the detection variation of the line pressure detection sensor 29 (line pressure detection unit) with respect to the oil temperature T is large.
- the target differential pressure ⁇ P is set larger than that in the second oil temperature region where the variation is smaller than the first oil temperature region.
- the target differential pressure ⁇ P can be appropriately set according to the change in the detection variation of the line pressure detection sensor 29 due to the different oil temperature regions, so that the excess amount of the target line pressure tPL due to the target differential pressure ⁇ P can be set. Can be further reduced.
- the transmission controller 2 (controller) has a small detection variation in the low oil temperature region LT and the high oil temperature region HT, which are the first oil temperature regions, and
- the target differential pressure ⁇ P is set larger than the intermediate oil temperature region CT as the second oil temperature region located between the low oil temperature region LT and the high oil temperature region HT.
- the target differential pressure ⁇ P is set large in the low oil temperature region LT and the high oil temperature region HT where the detection variation of the line pressure detection sensor 29 is large, and the intermediate oil with a small detection variation of the line pressure detection sensor 29.
- the target differential pressure ⁇ P By setting the target differential pressure ⁇ P small in the temperature region CT, the target differential pressure ⁇ P can be appropriately set according to the change in the detection variation of the line pressure detection sensor 29 due to different oil temperature regions, so that the target differential pressure ⁇ P can be appropriately set. The excess of the target line pressure tPL due to ⁇ P can be further reduced.
- Hydraulic control circuit 2 Transmission controller (controller) 29 Line pressure detection sensor (line pressure detection unit) 30 Oil temperature detection sensor 35 Circuit control device EP Mechanical oil pump (oil pump) MP electric oil pump (oil pump) TM transmission (belt continuously variable transmission) PRI Primary pulley SEC Secondary pulley BLT belt (transmission member)
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- Mechanical Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Control Of Transmission Device (AREA)
Abstract
Description
まず、図1を参照しながら本実施形態に係る変速機TMについて説明する。
次に、図2を参照しながら油圧制御回路1について説明する。
次に、図3を参照しながら変速機コントローラ2について説明する。
次に、図4から図7を参照しながら油圧制御回路1の制御処理(変速機TMの制御処理)について説明する。
次に、本実施形態の主な作用効果について説明する。
2 変速機コントローラ(コントローラ)
29 ライン圧検出センサ(ライン圧検出部)
30 油温検出センサ
35 回路制御装置
EP メカニカルオイルポンプ(オイルポンプ)
MP 電動オイルポンプ(オイルポンプ)
TM 変速機(ベルト無段変速機)
PRI プライマリプーリ
SEC セカンダリプーリ
BLT ベルト(伝達部材)
Claims (5)
- プライマリプーリと、
セカンダリプーリと、
前記プライマリプーリ及び前記セカンダリプーリに巻き掛けられた伝達部材と、
油を供給するオイルポンプと、
前記オイルポンプから供給された油を、前記プライマリプーリに供給されるプライマリプーリ圧及び前記セカンダリプーリに供給されるセカンダリプーリ圧の元圧であるライン圧に調圧する油圧制御回路と、
前記ライン圧を検出するライン圧検出部と、
前記油圧制御回路を制御するコントローラと、を備え、
前記コントローラは、
前記プライマリプーリ圧の目標値及び前記セカンダリプーリ圧の目標値のうちの高い方を目標プーリ圧として選択し、目標差圧を油温によって可変に設定し、前記ライン圧の目標値である目標ライン圧を、前記目標プーリ圧及び前記目標差圧の合計圧となるように設定し、検出された前記ライン圧が前記目標ライン圧に調圧されるように前記油圧制御回路を制御する、
変速機。 - 請求項1に記載の変速機であって、
前記コントローラは、油温に対する前記ライン圧検出部の検出ばらつきが大きい第1油温領域では、前記検出ばらつきが前記第1油温領域よりも小さい第2油温領域よりも前記目標差圧を大きく設定する、
変速機。 - 請求項2に記載の変速機であって、
前記コントローラは、前記第1油温領域である低油温領域及び高油温領域では、前記検出ばらつきが小さく、かつ、前記低油温領域と前記高油温領域との間に位置する前記第2油温領域としての中間油温領域よりも前記目標差圧を大きく設定する、
変速機。 - プライマリプーリと、セカンダリプーリと、前記プライマリプーリ及び前記セカンダリプーリに巻き掛けられた伝達部材と、油を供給するオイルポンプと、前記オイルポンプから供給された油を、前記プライマリプーリに供給されるプライマリプーリ圧及び前記セカンダリプーリに供給されるセカンダリプーリ圧の元圧であるライン圧に調圧する油圧制御回路と、を備える変速機の制御方法であって、
前記ライン圧を検出するライン圧検出ステップと、
前記プライマリプーリ圧の目標値及び前記セカンダリプーリ圧の目標値のうちの高い方を目標プーリ圧として選択し、目標差圧を油温によって可変に設定し、前記ライン圧の目標値である目標ライン圧を、前記目標プーリ圧及び前記目標差圧の合計圧となるように設定し、検出された前記ライン圧が前記目標ライン圧に調圧されるように前記油圧制御回路を制御する制御ステップと、を含む、
変速機の制御方法。 - プライマリプーリと、セカンダリプーリと、前記プライマリプーリ及び前記セカンダリプーリに巻き掛けられた伝達部材と、油を供給するオイルポンプと、前記オイルポンプから供給された油を、前記プライマリプーリに供給されるプライマリプーリ圧及び前記セカンダリプーリに供給されるセカンダリプーリ圧の元圧であるライン圧に調圧する油圧制御回路と、を備える変速機を制御するコンピュータが実行可能なプログラムであって、
前記ライン圧を検出するライン圧検出手順と、
前記プライマリプーリ圧の目標値及び前記セカンダリプーリ圧の目標値のうちの高い方を目標プーリ圧として選択し、目標差圧を油温によって可変に設定し、前記ライン圧の目標値である目標ライン圧を、前記目標プーリ圧及び前記目標差圧の合計圧となるように設定し、検出された前記ライン圧が前記目標ライン圧に調圧されるように前記油圧制御回路を制御する制御手順と、をコンピュータに実行させる、
プログラム。
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0719304A (ja) * | 1993-07-02 | 1995-01-20 | Suzuki Motor Corp | 車両用無段変速機のライン圧制御装置 |
JP2008020055A (ja) * | 2006-06-15 | 2008-01-31 | Toyota Motor Corp | ベルト式無段変速機の制御装置 |
JP2012154434A (ja) * | 2011-01-26 | 2012-08-16 | Toyota Motor Corp | 車両用ベルト式無段変速機の制御装置 |
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JPH0719304A (ja) * | 1993-07-02 | 1995-01-20 | Suzuki Motor Corp | 車両用無段変速機のライン圧制御装置 |
JP2008020055A (ja) * | 2006-06-15 | 2008-01-31 | Toyota Motor Corp | ベルト式無段変速機の制御装置 |
JP2012154434A (ja) * | 2011-01-26 | 2012-08-16 | Toyota Motor Corp | 車両用ベルト式無段変速機の制御装置 |
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