CN112460213B - Device and method for controlling safe service of continuously variable transmission under micro-motion and flutter coupling - Google Patents
Device and method for controlling safe service of continuously variable transmission under micro-motion and flutter coupling Download PDFInfo
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- CN112460213B CN112460213B CN202011384302.5A CN202011384302A CN112460213B CN 112460213 B CN112460213 B CN 112460213B CN 202011384302 A CN202011384302 A CN 202011384302A CN 112460213 B CN112460213 B CN 112460213B
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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
- F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
- F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
- F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
- F16H9/12—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
- F16H9/16—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts
- F16H9/18—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts only one flange of each pulley being adjustable
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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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor
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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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
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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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0487—Friction gearings
- F16H57/0489—Friction gearings with endless flexible members, e.g. belt CVTs
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a device and a method for controlling the safe service of a continuously variable transmission under the coupling of micro-motion and flutter, wherein the device comprises a camera, the continuously variable transmission, a lubricating and cooling flow calculating unit, a transmission oil outlet, a cooler, a first temperature sensor, a second temperature sensor, an oil tank, a lubricating motor controller, a hydraulic pump, a one-way valve, a hydraulic flow sensor and a lubricating and cooling spray head; the camera is connected with the lubricating and cooling flow calculating unit, and a lens of the camera is over against a belt ring of a metal belt of the continuously variable transmission; an oil outlet of the transmission is connected with an oil tank through an oil return pipe, and a cooler and a first temperature sensor are arranged on the oil return pipe; the oil tank is connected with the hydraulic pump through a pipeline, and a second temperature sensor is arranged on the pipeline; the stepless speed changer has the advantages of simple structure and low cost, can improve the service quality of the stepless speed changer in a high rotating speed state, and can also improve the comprehensive performance of the stepless speed changer for the traditional fuel vehicle.
Description
Technical Field
The invention relates to a device and a method for controlling the safe service of a continuously variable transmission under the coupling of micromotion and flutter.
Background
Under the condition of high-speed operation, the contact relation and boundary conditions of the CVT metal belt ring and the metal sheet can be changed, and the belt ring stress state and the lubrication condition are severe due to the fretting friction and the flutter effect generated when the belt wheel-metal sheet-belt ring non-continuous body is in contact. Under compound alternating stress load and the friction of the exhaust oil, the belt ring is very easy to wear, and then fatigue cracks are initiated, and finally the belt ring is cracked, namely CVT transmission failure seriously hinders the application of the belt ring on an electric automobile carrying a high-speed motor. The stress state of the belt ring is limited by the working condition, so that an effective control method is difficult to obtain. Therefore, the exploration of an efficient lubricating mechanism between a belt wheel, a metal sheet and a belt ring is one of basic works for solving the safe service of the continuously variable transmission in a high rotating speed state.
For improving the lubrication condition of 'belt wheel-metal sheet-belt ring', the key point is to regulate and control the lubrication cooling flow of the continuously variable transmission. The larger the lubricating and cooling flow is, the larger the thickness of an oil film between the belt wheel and the metal sheet and the belt ring is, the lower the service temperature is, the less the belt ring is easy to wear, and the continuously variable transmission can be in a safe service state for a long time. However, the lubricating and cooling flow of the existing continuously variable transmission is set according to the power loss value of the continuously variable transmission, namely, the heating value is taken away by the corresponding lubricating and cooling flow, so that the rapid abrasion of a belt wheel, a metal sheet and a belt ring is avoided, and the service life of the continuously variable transmission is ensured. And the power sources of the traditional continuously variable transmissions are all from engines, and the input rotating speed is generally not higher than 6000 rpm. With the social demands of electromotion and intellectualization, if the continuously variable transmission is applied to related electromotion vehicles, the lubricating and cooling flow cannot be established only by the traditional power loss under the condition of high rotating speed. If the lubricating and cooling flow is seriously lacked, the continuously variable transmission cannot stably run, and great potential safety hazard is caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides the device and the method for controlling the safe service of the continuously variable transmission under the micro-motion and flutter coupling, which have the advantages of simple structure and low cost, and can improve the service quality of the continuously variable transmission under the high rotating speed state and the comprehensive performance of the continuously variable transmission for the traditional fuel vehicle, thereby further prolonging the service life of the power-assisted continuously variable transmission by more than 30 kilometres.
The technical scheme adopted by the invention is as follows: a stepless speed changer safety service control device under micro-motion and flutter coupling comprises a camera, a stepless speed changer, a lubricating and cooling flow calculation unit, a speed changer oil outlet, a cooler, a first temperature sensor, a second temperature sensor, an oil tank, a lubricating motor controller, a hydraulic pump, a one-way valve, a hydraulic flow sensor and a lubricating and cooling spray head; the camera is connected with the lubricating and cooling flow calculating unit, and a lens of the camera is over against a belt ring of a metal belt of the continuously variable transmission; an oil outlet of the transmission is connected with an oil tank through an oil return pipe, and a cooler and a first temperature sensor are arranged on the oil return pipe; the oil tank is connected with the hydraulic pump through a pipeline, a second temperature sensor is arranged on the pipeline, and an oil outlet of the hydraulic pump is connected with an oil inlet of the one-way valve; the lubricating motor is fixedly connected with the hydraulic pump; an oil outlet of the one-way valve is connected with a lubricating and cooling spray nozzle through an oil inlet pipe, and a hydraulic flow sensor is arranged on the oil inlet pipe; the lubricating cooling flow calculation unit is respectively connected with the first temperature sensor, the second temperature sensor and the lubricating motor controller; the lubricating motor controller is respectively connected with the lubricating motor and the hydraulic flow sensor.
A method for controlling the safe service of the continuously variable transmission under the micro-motion and flutter coupling by utilizing the device for controlling the safe service of the continuously variable transmission under the micro-motion and flutter coupling comprises the following steps:
1) detecting the up-down jumping amount and the left-right jumping amount of the belt ring of the metal belt through a camera, and calculating the comprehensive jumping amount of the belt ring of the metal belt;
2) detecting the oil temperature of an oil outlet of the transmission through a first temperature sensor, detecting the oil temperature of a liquid inlet of a hydraulic pump through a second temperature sensor, comparing the comprehensive jumping amount of the belt ring calculated in the step 1) with a safety threshold value, if the comprehensive jumping amount of the belt ring is smaller than the safety threshold value, adopting the conventional lubricating and cooling flow for the continuously variable transmission, otherwise, adopting the safe service lubricating and cooling flow for the continuously variable transmission;
3) calculating a target liquid outlet flow velocity, detecting a liquid outlet flow velocity of the lubricating and cooling spray nozzle, comparing the liquid outlet flow velocity with the target liquid outlet flow velocity, if the liquid outlet flow velocity is less than the target liquid outlet flow velocity, the lubricating motor operates in a speed-increasing mode, if the liquid outlet flow velocity is greater than the target liquid outlet flow velocity, the lubricating motor operates in a speed-reducing mode, and if not, the lubricating motor operates in a constant speed mode.
In the method for controlling the safe service of the continuously variable transmission under the coupling of the micromotion and the flutter, in the step 1), a calculation formula of the comprehensive jump quantity delta l of the belt ring of the metal belt is as follows:
in the formula, x and y respectively represent the left and right jumping quantities and the up and down jumping quantities of the belt ring; x is the number of0、y0The safety threshold values of the left and right jumping quantities and the safety threshold values of the up and down jumping quantities of the belt ring are constants; a is1The amount of up and down jumping is a proportional weight and constant.
In the method for controlling the safe service of the continuously variable transmission under the coupling of the micro-motion and the flutter, in the step 2), a calculation formula of the conventional lubricating and cooling flow is as follows:
wherein c is the specific heat capacity of the lubricating oil; rho is the density of the lubricating oil; p is the output power of the drive motor of the continuously variable transmission; eta is the transmission efficiency of the continuously variable transmission; t is tinThe oil temperature value of the liquid inlet of the hydraulic pump; t is toutThe oil temperature value of the oil outlet of the transmission is obtained; ε is the safety threshold.
In the method for controlling the safe service of the continuously variable transmission under the coupling of the micro-motion and the flutter, in the step 2), a calculation formula of the safe service lubrication cooling flow is as follows:
wherein, t0Sampling time for lubricating a motor controller; n and n-1 are two adjacent sampling serial numbers and represent the nth sampling time and the (n-1) th sampling time; b1Is a flow correction coefficient and is constant.
In the method for controlling the safe service of the continuously variable transmission under the flutter coupling, in the step 3), n of the flow rate of the target liquid outlet is settThe calculation method is as follows:
wherein d is the inner diameter of the lubricating and cooling spray head.
Compared with the prior art, the invention has the beneficial effects that: the invention detects the fretting friction and the flutter effect of the metal belt ring by detecting the up-down jumping amount and the left-right jumping amount of the metal belt ring, calculates the safe service lubricating and cooling flow of the continuously variable transmission on line, and sends the safe service lubricating and cooling flow to the lubricating and cooling system, so as to improve the lubricating state of the metal belt ring, reduce the fretting friction and the flutter effect of the metal belt ring and improve the service quality of the CVT. The stepless speed changer has the advantages of simple structure and low cost, can improve the service quality of the stepless speed changer in a high rotating speed state, can also improve the comprehensive performance of the stepless speed changer for the traditional fuel vehicle, and provides power assistance for the service life of the stepless speed changer to be more than 30 kilometers.
Drawings
Fig. 1 is a schematic structural diagram of a continuously variable transmission safety service control device under the coupling of micromotion and flutter according to the invention.
FIG. 2 is a schematic side view of a camera of the present invention detecting a metal belt loop.
FIG. 3 is a flow chart of the method for controlling the safe service of the continuously variable transmission under the coupling of the micromotion and the flutter according to the invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the device for controlling the safe service of the continuously variable transmission under the coupling of the micro-motion and the flutter comprises a camera 12, a lubricating and cooling flow calculating unit 11, a transmission oil outlet 13, a cooler 15, a first temperature sensor 14, a second temperature sensor 17, an oil tank 16, a lubricating motor 18, a lubricating motor controller 21, a hydraulic pump 19, the continuously variable transmission, a check valve 20, a hydraulic flow sensor 22 and a lubricating and cooling nozzle 23. The continuously variable transmission comprises a driving motor 1, a driving wheel moving conical disc 2, a driving wheel fixed conical disc 4, a driving wheel shaft 3, a driving wheel oil inlet oil path 5, a metal belt 6, a driven wheel oil inlet 10, a driven wheel shaft 9, a driven wheel fixed conical disc 8 and a driven wheel moving conical disc 7. The driving motor 1 is connected with the driving wheel shaft 3, the driving wheel shaft 3 is fixedly connected with the driving wheel fixed cone disc 4, a driving wheel oil inlet oil path 5 is arranged in the driving wheel shaft 3, and the driving wheel movable cone disc 2 can slide left and right on the driving wheel shaft 3. The driven wheel shaft 9 is fixedly connected with the driven wheel fixed conical disc 8, the driven wheel movable conical disc 7 can slide back and forth on the driven wheel shaft 9, and the driven wheel oil inlet channel 10 is arranged in the driven wheel shaft 9. The metal belt 6 is clamped between the driving wheel moving conical disc 2 and the driving wheel fixed conical disc 4 and between the driven wheel fixed conical disc 8 and the driven wheel moving conical disc 7.
The camera 12 is connected with the lubricating and cooling flow calculating unit 11, and a lens of the camera is over against a belt ring of a metal belt of the transmission; the transmission oil outlet 13 is arranged at the bottom of the continuously variable transmission shell and is connected with an oil tank 16 through an oil return pipe, and a cooler 15 and a first temperature sensor 14 are arranged on the oil return pipe. The oil tank 16 and the hydraulic pump 19 are connected by a pipe on which a second temperature sensor 17 is provided. The lubricating motor 18 is fixedly connected with a hydraulic pump 19, and an oil outlet of the hydraulic pump 19 is connected with an oil inlet of a one-way valve 20. An oil outlet of the one-way valve 20 is connected with a lubricating and cooling spray nozzle 23 through an oil inlet pipe, and a hydraulic flow sensor 22 is arranged on the oil inlet pipe. The lubricating cooling flow calculation unit 11 is respectively connected with the first temperature sensor 14, the second temperature sensor 17 and the motor controller 21, receives temperature values of the first temperature sensor 14 and the second temperature sensor 17, and sends a flow instruction to the lubricating motor controller 21; the lubricating motor controller 21 is connected with the lubricating motor 18 and the hydraulic flow sensor 22 respectively.
As shown in fig. 2, the metal belt 6 consists of 9 belt loops 26 and several hundred metal sheets 25. The camera 12 is facing the belt loop 26 of the metal belt 6. The direction along the band 26 is the X-direction and the direction perpendicular to the band 26 is the Y-direction.
As shown in FIG. 3, the method for controlling the safe service of the continuously variable transmission under the coupling of the micromotion and the flutter comprises the following steps:
1) detecting the up-down jumping amount and the left-right jumping amount of the belt loop 26 of the metal belt 6 through the camera 12, and calculating the comprehensive jumping amount of the belt loop 26 of the metal belt 6;
the calculation formula of the integrated runout Δ l of the belt loop 26 of the metal belt 6 is as follows:
in the formula: x and y represent the amount of left-right jumping and the amount of up-down jumping of the belt loop 26, respectively; x is the number of0、y0Respectively represent a safe threshold value of the left and right jumping quantities and a safe threshold value of the up and down jumping quantities of the belt loop 26, and a constant; a is1The amount of up and down jumping is a proportional weight and constant.
2) Detecting the oil temperature of an oil outlet 13 of the transmission through a first temperature sensor 14, detecting the oil temperature of a liquid inlet of a hydraulic pump 19 through a second temperature sensor 17, comparing the comprehensive jump quantity of the belt ring 26 of the metal belt 6 obtained in the step 1) with a safety threshold value, if the comprehensive jump quantity is smaller than the safety threshold value, adopting the conventional lubricating and cooling flow for the continuously variable transmission, otherwise, adopting the safe service lubricating and cooling flow for the continuously variable transmission;
the calculation formula of the conventional lubricating and cooling flow is as follows:
wherein: c is the specific heat capacity of the lubricating oil; rho is the density of the lubricating oil; p is the output power of the drive motor 1; eta is the transmission efficiency of the continuously variable transmission; t is tinThe value of the oil temperature of the liquid inlet of the hydraulic pump 19; t is toutIs the oil temperature value of the transmission oil outlet 13; ε is the safety threshold.
The calculation formula of the safe service lubricating and cooling flow is as follows:
wherein, t0To the sampling time of the lubrication motor controller 21; n and n-1 are two adjacent sampling serial numbers and represent the nth sampling time and the (n-1) th sampling time; b1Is a flow correction coefficient and is constant.
3) Calculating a target outlet flow velocity, comparing the outlet flow velocity with the target outlet flow velocity by detecting the outlet flow velocity of the lubricating cooling spray nozzle 23, if the outlet flow velocity is less than the target outlet flow velocity, the lubricating motor 18 operates at an increased speed, if the outlet flow velocity is greater than the target outlet flow velocity, the lubricating motor 18 operates at a reduced speed, otherwise, the lubricating motor 18 operates at a constant speed.
N of target exit port flow velocitytThe calculation method is as follows:
where d is the inner diameter of the lubricating cooling nozzle 23.
Claims (3)
1. A method for controlling the safe service of a continuously variable transmission under the coupling of micromotion and flutter is realized by adopting a safe service control device of the continuously variable transmission under the coupling of the micromotion and the flutter, wherein the safe service control device of the continuously variable transmission under the coupling of the micromotion and the flutter comprises a camera, the continuously variable transmission, a lubricating and cooling flow calculating unit, a transmission oil outlet, a cooler, a first temperature sensor, a second temperature sensor, an oil tank, a lubricating motor controller, a hydraulic pump, a one-way valve, a hydraulic flow sensor and a lubricating and cooling spray head; the camera is connected with the lubricating and cooling flow calculating unit, and a lens of the camera is over against a belt ring of a metal belt of the continuously variable transmission; an oil outlet of the transmission is connected with an oil tank through an oil return pipe, and a cooler and a first temperature sensor are arranged on the oil return pipe; the oil tank is connected with the hydraulic pump through a pipeline, a second temperature sensor is arranged on the pipeline, and an oil outlet of the hydraulic pump is connected with an oil inlet of the one-way valve; the lubricating motor is fixedly connected with the hydraulic pump; an oil outlet of the one-way valve is connected with a lubricating and cooling spray nozzle through an oil inlet pipe, and a hydraulic flow sensor is arranged on the oil inlet pipe; the lubricating cooling flow calculation unit is respectively connected with the first temperature sensor, the second temperature sensor and the lubricating motor controller; the lubricating motor controller is respectively connected with the lubricating motor and the hydraulic flow sensor;
the method comprises the following steps:
1) detecting the up-down jumping amount and the left-right jumping amount of the belt ring of the metal belt through a camera, and calculating the comprehensive jumping amount of the belt ring of the metal belt;
2) the oil temperature of the oil outlet of the transmission is detected through the first temperature sensor, the oil temperature of the oil inlet of the hydraulic pump is detected through the second temperature sensor, and the oil temperature of the oil outlet of the transmission and the oil temperature of the oil inlet of the hydraulic pump are used for calculating the conventional lubricating and cooling flow and the safe service lubricating and cooling flow;
comparing the comprehensive jumping amount of the belt rings calculated in the step 1) with a safety threshold, if the comprehensive jumping amount of the belt rings is smaller than the safety threshold, adopting conventional lubricating and cooling flow for the continuously variable transmission, otherwise, adopting safe service lubricating and cooling flow for the continuously variable transmission;
the calculation formula of the conventional lubricating and cooling flow is as follows:
wherein c is the specific heat capacity of the lubricating oil; rho is the density of the lubricating oil; p is the output power of the drive motor of the continuously variable transmission; eta is the transmission efficiency of the continuously variable transmission; t is tinThe oil temperature value of the liquid inlet of the hydraulic pump; t is toutThe oil temperature value of the oil outlet of the transmission is obtained; epsilon is a safety threshold; delta l is the comprehensive jumping amount of the belt ring;
the calculation formula of the safe service lubricating and cooling flow is as follows:
wherein, t0Sampling time for lubricating a motor controller; n and n-1 are two adjacent sampling serial numbers and represent the nth sampling time and the (n-1) th sampling time; b1Is a flow correction coefficient, constant;
3) calculating a target liquid outlet flow velocity, detecting a liquid outlet flow velocity of the lubricating and cooling spray nozzle, comparing the liquid outlet flow velocity with the target liquid outlet flow velocity, if the liquid outlet flow velocity is less than the target liquid outlet flow velocity, the lubricating motor operates in a speed-increasing mode, if the liquid outlet flow velocity is greater than the target liquid outlet flow velocity, the lubricating motor operates in a speed-reducing mode, and if not, the lubricating motor operates in a constant speed mode.
2. The method for controlling the safe service of the continuously variable transmission under the coupling of the inching and the fluttering according to claim 1, wherein in the step 1), the calculation formula of the comprehensive jump quantity Δ l of the belt loop of the metal belt is as follows:
in the formula, x and y respectively represent the left and right jumping quantities and the up and down jumping quantities of the belt ring; x is the number of0、y0The safety threshold values of the left and right jumping quantities and the safety threshold values of the up and down jumping quantities of the belt ring are constants; a is1The amount of up and down jumping is a proportional weight and constant.
3. The method for controlling the safety service of a continuously variable transmission coupled by micro-motion and flutter according to claim 2, wherein in step 3), n is the target outlet flow ratetThe calculation method is as follows:
wherein d is the inner diameter of the lubricating and cooling spray head.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011384302.5A CN112460213B (en) | 2020-12-01 | 2020-12-01 | Device and method for controlling safe service of continuously variable transmission under micro-motion and flutter coupling |
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| CN202011384302.5A CN112460213B (en) | 2020-12-01 | 2020-12-01 | Device and method for controlling safe service of continuously variable transmission under micro-motion and flutter coupling |
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| CN112460213B true CN112460213B (en) | 2021-12-24 |
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| CN113028040B (en) * | 2021-03-24 | 2022-06-07 | 湖南工程学院 | Automatic transmission lubrication flow control device and method for electric vehicle |
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| JP2000154866A (en) * | 1998-11-19 | 2000-06-06 | Toyota Central Res & Dev Lab Inc | Hydraulic controller of continuously variable transmission for vehicle |
| JP2005180620A (en) * | 2003-12-19 | 2005-07-07 | Toyota Motor Corp | Lubricating/cooling device for continuously variable transmission for vehicle |
| CN105909771A (en) * | 2016-06-21 | 2016-08-31 | 肇庆高新区凯盈顺汽车设计有限公司 | Transmission cooling system |
| JP2017075665A (en) * | 2015-10-16 | 2017-04-20 | トヨタ自動車株式会社 | Control device of continuously variable transmission |
| CN106838301A (en) * | 2017-01-19 | 2017-06-13 | 湘潭大学 | A kind of buncher metal tape clamping force control device and control method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202955204U (en) * | 2012-07-26 | 2013-05-29 | 诺威起重设备（苏州）有限公司 | Lubricating system of large exposed gears |
| NL1042205B1 (en) * | 2016-12-30 | 2018-07-23 | Bosch Gmbh Robert | Method for operating a continuously variable transmission incorporating a drive belt in a motor vehicle |
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2020
- 2020-12-01 CN CN202011384302.5A patent/CN112460213B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000154866A (en) * | 1998-11-19 | 2000-06-06 | Toyota Central Res & Dev Lab Inc | Hydraulic controller of continuously variable transmission for vehicle |
| JP2005180620A (en) * | 2003-12-19 | 2005-07-07 | Toyota Motor Corp | Lubricating/cooling device for continuously variable transmission for vehicle |
| JP2017075665A (en) * | 2015-10-16 | 2017-04-20 | トヨタ自動車株式会社 | Control device of continuously variable transmission |
| CN105909771A (en) * | 2016-06-21 | 2016-08-31 | 肇庆高新区凯盈顺汽车设计有限公司 | Transmission cooling system |
| CN106838301A (en) * | 2017-01-19 | 2017-06-13 | 湘潭大学 | A kind of buncher metal tape clamping force control device and control method |
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