Transmission device and control method for automobile

Abstract

The present invention discloses a transmission device and control method for an automobile. The transmission device includes a torque converter mechanism, a hydraulic pump, an oil reservoir, an oil inlet pipe, and an oil return pipe. One end of the oil inlet pipe is connected to an oil inlet hole on the torque converter mechanism housing, and the other end is connected to the oil reservoir via the hydraulic pump. One end of the oil return pipe is connected to an oil return hole on the torque converter mechanism housing, and the other end is connected to the oil reservoir. One end of the torque converter mechanism is connected to an engine output shaft via a transmission electromagnetic clutch, and the other end is coaxially connected to an automatic transmission. The hydraulic pump is powered by the engine. The present invention, in conjunction with an automatic transmission installed thereafter, achieves the speed and torque requirements of the vehicle, enabling a wide range of continuously variable speeds and high-efficiency operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile transmission, and in particular relates to an automobile transmission device and a control method. Background Art

[0002] Traditional automobile transmission systems primarily utilize mechanical transmission devices such as friction clutches. While these devices offer high transmission efficiency, they often experience a certain degree of jerkiness during starting and shifting, hindering smooth driving. In addition to these transmission devices, torque converters are also a key component in automatic transmission systems. A torque converter is a non-rigid torque converter that uses liquid as its working medium and is classified as a hydraulic transmission device. Because the torque converter's working medium is liquid, it allows for a flexible connection between the driving and driven shafts, enabling continuous speed change within a certain range. This absorbs and reduces vibration and shock, ensuring smooth starting and shifting. However, during operation, the torque ratio changes in a fixed pattern depending on the torque converter's speed ratio, preventing flexible adjustment of output torque. This results in a narrow range of continuously variable speeds, and its efficiency is also affected by the speed ratio. Summary of the Invention

[0003] In order to solve the above problems, the present invention proposes a torque-adjustable transmission device based on the transmission characteristics of the automobile. The device cooperates with the automatic transmission installed behind it to meet the speed and torque requirements of the automobile, achieving a wider range of stepless speed change and high-efficiency operation.

[0004] The technical solution adopted by the present invention is: a transmission device for an automobile, including a torque converter mechanism, a hydraulic pump, an oil storage tank, an oil inlet pipe and an oil return pipe; one end of the oil inlet pipe is connected to the oil inlet hole on the torque converter mechanism housing, and the other end is connected to the oil storage tank through the hydraulic pump; one end of the oil return pipe is connected to the oil return hole on the torque converter mechanism housing, and the other end is connected to the oil storage tank; one end of the torque converter mechanism is connected to the engine output shaft through a transmission electromagnetic clutch, and the other end is coaxially connected to the automatic transmission; the hydraulic pump is powered by the engine.

[0005] Furthermore, the hydraulic pump is connected to the hydraulic pump drive shaft through a hydraulic pump electromagnetic clutch, a hydraulic pump driven gear is installed on the hydraulic pump drive shaft, the hydraulic pump driven gear is meshed with the hydraulic pump driving gear, and the hydraulic pump driving gear is installed on the engine output shaft.

[0006] Furthermore, the torque transmission mechanism includes a housing, a transmission shaft, an adjuster, a blade shaft, a flexible rack, a spiral base, variable angle blades, bearings and a sleeve; the transmission shaft passes through the housing shell; a spiral base is installed on the transmission shaft in the housing, and variable angle blades are installed on the spiral base at intervals; an adjuster is installed at one end of the transmission shaft, and the adjuster is installed in the shaft hole of the housing through a bearing; the other end of the transmission shaft has a rectangular groove for accommodating the flexible rack, and a sleeve is passed outside the rectangular groove and is tightly combined with the transmission shaft and installed in the shaft hole of the housing through a bearing.

[0007] Furthermore, the variable angle blade is mounted on the spiral base through the blade shaft, and a spiral rack groove is provided along the middle of the spiral base. A flexible rack is provided in the rack groove, and the flexible rack is engaged with the blade gear on the blade shaft, so that the variable angle blade can rotate around the blade shaft.

[0008] Furthermore, the spiral base is a continuous metal sheet in a spiral shape.

[0009] Furthermore, the regulator includes a drive motor, a drive gear, a slip ring and a regulator housing; the slip ring is connected to the power supply circuit and is used to control the rotation direction and angle of the drive motor; the drive motor is installed in the regulator housing, and the drive gear is installed on the output shaft of the drive motor. The drive gear moves by pulling the flexible rack engaged with it, so that the flexible rack drives the blade gear to rotate, thereby controlling the braking angle of the variable-angle blade.

[0010] Furthermore, an oil inlet hole and an oil return hole are respectively provided at both ends of the housing, wherein the oil inlet hole is close to the engine side and the oil return hole is far away from the engine side.

[0011] Furthermore, hydraulic valves are installed at the oil inlet hole and the oil return hole respectively, for controlling the on and off of the oil inlet hole and the oil return hole.

[0012] The present invention also includes a method for controlling a variable torque transmission device, the method comprising:

[0013] Based on the throttle opening and current vehicle speed as the basis for inferring the driver's intention, the driving demand signal is obtained, thereby obtaining the four current vehicle control trends, namely starting, upshifting, downshifting and maintaining the current gear;

[0014] When the car needs to start, the transmission electromagnetic clutch is disengaged, the hydraulic pump electromagnetic clutch is engaged, the hydraulic valves at the oil inlet and oil return holes are opened, the collector ring circuit is connected, and the angle of the variable angle blade is adjusted to the maximum torque angle through the regulator; then the automatic transmission operating mechanism is controlled to shift into low gear, so that the car can start running;

[0015] When the car is driving and the driving demand signal is a transmission upshift signal, the transmission electromagnetic clutch is disengaged, the hydraulic pump electromagnetic clutch is engaged, the hydraulic valves at the oil inlet and oil return holes are opened, the collector ring circuit is connected, and the angle of the variable angle blade is adjusted to 0.5 times the maximum torque angle through the regulator, and then the transmission upshift action is executed;

[0016] When the car is driving and the driving demand signal is a gearbox downshift signal, the transmission electromagnetic clutch is disengaged, the hydraulic pump electromagnetic clutch is engaged, the hydraulic valves at the oil inlet and oil return holes are opened, the collector ring circuit is connected, and the angle of the variable angle blade is gradually increased by the regulator until the variable angle blade reaches the corresponding angle of maximum torque. If the current gear demand is still not met at this time, the gearbox downshift action is executed;

[0017] If the current gear position of the transmission can meet the driving conditions, in order to improve transmission efficiency and reduce mechanical transmission losses, the transmission electromagnetic clutch will be engaged and the hydraulic pump electromagnetic clutch will be disengaged, so that the engine power is directly transmitted to the transmission; close the hydraulic valves at the oil inlet and oil return holes, adjust the angle of the variable angle blade to 0, and reduce the resistance of the hydraulic oil to a minimum.

[0018] The present invention has the beneficial effect of adjusting the output torque of the transmission device according to the vehicle's torque requirements, thereby reducing the number of transmission gears in the transmission system and simplifying the transmission system. In addition, the present invention can effectively achieve stepless speed regulation, thereby reducing engine fuel consumption and emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a system structure diagram of the present invention;

[0020] Figure 2 Schematic diagram of the structure of the variable pitch transmission mechanism of the present invention;

[0021] Figure 3 It is a structural diagram of the variable angle blade;

[0022] Figure 4 Schematic diagram of the structure of the regulator in the present invention;

[0023] Figure 5 This is a schematic diagram of the hydraulic pump power transmission structure;

[0024] Figure 6 FIG is a control method diagram of the present invention;

[0025] In the figure: 1-torque transmission mechanism, 2-oil storage tank, 3-oil inlet pipe, 4-oil return pipe, 5-hydraulic pump, 6-transmission electromagnetic clutch, 7-engine output shaft, 8-transmission shaft, 9-regulator, 10-housing, 11-blade shaft, 12-flexible rack, 13-oil return hole, 14-oil inlet hole, 15-spiral base, 16-variable angle blade, 17-bearing, 18-sleeve, 19-collector ring, 20-drive gear, 21-drive motor, 22-blade gear, 23-regulator housing, 24-hydraulic pump drive shaft, 25-hydraulic pump driving gear, 26-hydraulic pump driven gear, 27-hydraulic pump electromagnetic clutch. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] like Figure 1 As shown, the present invention is a transmission device for an automobile, comprising a torque converter mechanism 1, an oil reservoir 2, an oil inlet pipe 3, an oil return pipe 4, and a hydraulic pump 5. The torque converter mechanism 1 is powered by an engine output shaft 7, which is connected to the torque converter mechanism 1 via a transmission electromagnetic clutch 6. The other end of the torque converter mechanism 1 is coaxially connected to the automatic transmission. One end of the oil inlet pipe 3 is connected to the oil inlet hole 14 on the outer casing of the torque converter mechanism 1 via the hydraulic pump 5, and the other end is connected to the oil reservoir 2. The oil return pipe 4 has one end connected to the oil return hole 13 on the outer casing of the torque converter mechanism 1 and the other end is connected to the oil reservoir 2. The oil in the oil reservoir 2 of the present invention is a dual-purpose oil for hydraulic transmission, which transmits the power input from the engine to the transmission system via the hydraulic pump 5 within the torque converter mechanism 1.

[0028] When the car is starting or in other working conditions that require a large torque, the transmission electromagnetic clutch 6 is in the disconnected state, and the engine drives the hydraulic pump 5 to drive the torque conversion transmission mechanism 1 to transmit power; when the car is in a working condition that does not require torque conversion, the hydraulic pump 5 stops working, and the transmission electromagnetic clutch 6 is converted to the engaged state, and the engine output shaft directly drives the transmission shaft 8 in the torque conversion transmission mechanism 1 to rotate.

[0029] like Figure 2 and Figure 3As shown, the torque converter mechanism 1 includes a drive shaft 8, a regulator 9, a housing 10, a blade shaft 11, a flexible rack 12, an oil return port 13, an oil inlet port 14, a spiral base 15, variable-angle blades 16, a bearing 17, and a sleeve 18. The drive shaft 8, connected to the electromagnetic clutch 6, passes through the middle of the housing 10, and the distal end of the drive shaft 8 is coaxially connected to the automatic transmission. The spiral base 15 is mounted on the drive shaft 8 within the housing 10. The spiral base 15 is a continuous, spiral-shaped metal sheet with a rack groove defined in the middle, giving it a spiral shape. The blade shaft 11 is equipped with a blade gear 22. The flexible rack 12 is positioned within the rack groove on the lower spiral surface of the spiral base 15. The variable-angle blades 16 are mounted on the spiral base 15 with spacing therebetween across the blade shaft 11. The flexible rack 12 cooperates with the blade gear 22 on the blade shaft 11 to pull the blade shaft 11 to rotate about its own axis, thereby enabling the variable-angle blades 10 to rotate about the blade shaft 11. The angle between the variable-angle blade 10 and the spiral base 15 directly affects the torque variation of the torque converter 1. The oil inlet 14 and oil return 13 are located on the housing end faces near the engine and away from the engine, respectively, and are connected to the oil inlet pipe 3 and oil return pipe 4, respectively.

[0030] An adjuster 9 is mounted on one end of the transmission shaft 8, which is mounted in the shaft hole of the housing 10 via a bearing 17. The other end of the transmission shaft 8 has a rectangular groove for accommodating the flexible rack 12. A sleeve 18 is provided outside the rectangular groove and is tightly coupled to the transmission shaft 8. The sleeve 18 is mounted in the shaft hole of the housing 10 via a bearing 17.

[0031] like Figure 4 As shown, the regulator 9 includes a collector ring 19, a drive gear 20, a drive motor 21 and a regulator housing 23; the collector ring 19 is connected to the power circuit and is used to control the rotation direction and angle of the drive motor 21; the drive motor 21 is installed in the regulator housing 23, and the drive gear 20 is installed on the output shaft of the drive motor 21. The drive gear 20 moves by pulling the flexible rack 12 engaged therewith to achieve the purpose of controlling the variable angle blade 10 to rotate to the braking angle.

[0032] like Figure 5 As shown, the hydraulic pump 5 is connected to the hydraulic pump drive shaft 24 through the hydraulic pump electromagnetic clutch 27, a hydraulic pump driving gear 25 is installed on the engine output shaft 7, and a hydraulic pump driven gear 26 is installed on the hydraulic pump drive shaft 24. The hydraulic pump driven gear 26 is meshed with the hydraulic pump driving gear 25. When the hydraulic pump electromagnetic clutch 27 is engaged, the hydraulic pump 5 is driven by the engine to work.

[0033] The control method for the torque transmission mechanism in the present invention is as follows: Figure 6As shown, the control logic includes the following: based on the throttle opening and the current vehicle speed as the basis for inferring the driver's intention, a driving demand signal is obtained, thereby obtaining four control trends of the current vehicle, namely starting, upshifting, downshifting and maintaining the current gear.

[0034] When the car needs to start, the transmission electromagnetic clutch is disengaged, the hydraulic pump electromagnetic clutch is engaged, the hydraulic valves at the oil inlet and oil return holes are opened, the collector ring circuit is connected, and the angle of the variable angle blade is adjusted to the maximum torque angle through the regulator; then the automatic transmission operating mechanism is controlled to shift into low gear, allowing the car to start running.

[0035] When the car is driving and the driving demand signal is a transmission upshift signal, the transmission electromagnetic clutch is disengaged, the hydraulic pump electromagnetic clutch is engaged, the hydraulic valves at the oil inlet and oil return holes are opened, the collector ring circuit is connected, and the angle of the variable angle blade is adjusted to 0.5 times the maximum torque angle through the regulator, and then the transmission upshift action is executed.

[0036] When the car is driving and the driving demand signal is a transmission downshift signal, the transmission electromagnetic clutch is disengaged, the hydraulic pump electromagnetic clutch is engaged, the hydraulic valves at the oil inlet and oil return holes are opened, the collector ring circuit is connected, and the angle of the variable angle blade is adjusted by the regulator to gradually increase until the variable angle blade reaches the corresponding angle of maximum torque. If the current gear demand still cannot be met at this time, the transmission downshift action is executed.

[0037] If the current gear position of the transmission can meet the driving conditions, in order to improve transmission efficiency and reduce mechanical transmission losses, the transmission electromagnetic clutch will be engaged and the hydraulic pump electromagnetic clutch will be disengaged to allow the engine power to be directly transmitted to the transmission; the hydraulic valves at the oil inlet and oil return holes will be closed to prevent the hydraulic oil from flowing back into the fuel tank, causing power interruption due to refilling of oil when starting again or shifting gears; finally, the angle of the variable angle blade is adjusted to 0 degrees to minimize the resistance of the hydraulic oil.

Claims

1. A transmission device for an automobile, comprising a torque converter mechanism, a hydraulic pump, an oil storage tank, an oil inlet pipe, and an oil return pipe, characterized in that: One end of the oil inlet pipe is connected to the oil inlet hole on the torque converter housing, and the other end is connected to the oil storage tank through a hydraulic pump; one end of the oil return pipe is connected to the oil return hole on the torque converter housing, and the other end is connected to the oil storage tank; one end of the torque converter is connected to the engine output shaft through a transmission electromagnetic clutch, and the other end is coaxially connected to the automatic transmission; The hydraulic pump is powered by the engine; the hydraulic pump is connected to the hydraulic pump drive shaft through a hydraulic pump electromagnetic clutch, a hydraulic pump driven gear is installed on the hydraulic pump drive shaft, the hydraulic pump driven gear is meshed with the hydraulic pump driving gear, and the hydraulic pump driving gear is installed on the engine output shaft; The torque transmission mechanism includes a housing, a transmission shaft, an adjuster, a blade shaft, a flexible rack, a spiral base, variable-angle blades, a bearing, and a sleeve; the transmission shaft passes through the housing shell; a spiral base is mounted on the transmission shaft within the housing, and variable-angle blades are mounted on the spiral base at intervals; an adjuster is mounted on one end of the transmission shaft, and the adjuster is mounted in the shaft hole of the housing via a bearing; the other end of the transmission shaft has a rectangular groove for accommodating the flexible rack, and a sleeve passes outside the rectangular groove and is tightly coupled to the transmission shaft and mounted in the shaft hole of the housing via a bearing; The variable angle blade is mounted on the spiral base via a blade shaft. A spiral rack groove is provided along the middle of the spiral base. A flexible rack is provided in the rack groove. The flexible rack meshes with the blade gear on the blade shaft, so that the variable angle blade can rotate around the blade shaft. The spiral base is a continuous metal sheet in a spiral shape; The regulator includes a drive motor, a drive gear, a slip ring, and a regulator housing; the slip ring is connected to the power circuit and is used to control the rotation direction and angle of the drive motor; the drive motor is installed in the regulator housing, and the drive gear is installed on the output shaft of the drive motor. The drive gear moves by pulling the flexible rack engaged with it, so that the flexible rack drives the blade gear to rotate, thereby controlling the rotation angle of the variable angle blade; An oil inlet hole and an oil return hole are respectively provided at both ends of the housing, wherein the oil inlet hole is close to the engine side and the oil return hole is far away from the engine side; Hydraulic valves are respectively installed at the oil inlet hole and the oil return hole to control the on and off of the oil inlet hole and the oil return hole.

2. A method for controlling a transmission device for an automobile according to claim 1, characterized in that: include: Based on the throttle opening and current vehicle speed as the basis for inferring the driver's intention, the driving demand signal is obtained, thereby obtaining the four current vehicle control trends, namely starting, upshifting, downshifting and maintaining the current gear; When the car needs to start, the transmission electromagnetic clutch is disengaged, the hydraulic pump electromagnetic clutch is engaged, the hydraulic valves at the oil inlet and oil return holes are opened, the collector ring circuit is connected, and the angle of the variable angle blade is adjusted to the maximum torque angle through the regulator; then the automatic transmission operating mechanism is controlled to shift into low gear, so that the car can start running; When the vehicle is in motion and the driving demand signal is a transmission upshift signal, the transmission electromagnetic clutch is disengaged, the hydraulic pump electromagnetic clutch is engaged, the hydraulic valves at the oil inlet and oil return holes are opened, the collector ring circuit is connected, and the angle of the variable angle blade is adjusted to 0.5 times the maximum torque angle through the regulator, and then the transmission upshift action is executed; When the car is driving and the driving demand signal is a gearbox downshift signal, the transmission electromagnetic clutch is disengaged, the hydraulic pump electromagnetic clutch is engaged, the hydraulic valves at the oil inlet and oil return holes are opened, the collector ring circuit is connected, and the angle of the variable angle blade is gradually increased by the regulator until the variable angle blade reaches the corresponding angle of maximum torque. If the current gear demand is still not met at this time, the gearbox downshift action is executed; If the current gear position of the transmission can meet the driving conditions, in order to improve transmission efficiency and reduce mechanical transmission losses, the transmission electromagnetic clutch will be engaged and the hydraulic pump electromagnetic clutch will be disengaged, so that the engine power is directly transmitted to the transmission; close the hydraulic valves at the oil inlet and oil return holes, adjust the angle of the variable angle blade to 0, and reduce the resistance of the hydraulic oil to a minimum.

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