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WO2025208193A1 - Transmission à variation continue intertielle et différentielle - Google Patents

Transmission à variation continue intertielle et différentielle

Info

Publication number
WO2025208193A1
WO2025208193A1 PCT/BR2025/050116 BR2025050116W WO2025208193A1 WO 2025208193 A1 WO2025208193 A1 WO 2025208193A1 BR 2025050116 W BR2025050116 W BR 2025050116W WO 2025208193 A1 WO2025208193 A1 WO 2025208193A1
Authority
WO
WIPO (PCT)
Prior art keywords
differential
gear
ring gear
power
turbine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/BR2025/050116
Other languages
English (en)
Portuguese (pt)
Inventor
Alan MIRANDA MONTEIRO DE LIMA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from BR102024006361-9A external-priority patent/BR102024006361A2/pt
Application filed by Individual filed Critical Individual
Publication of WO2025208193A1 publication Critical patent/WO2025208193A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
    • F16H47/06—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type
    • F16H47/08—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type the mechanical gearing being of the type with members having orbital motion
    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion

Definitions

  • the present invention falls within the field of application of gear systems for transmitting rotary motion with a transmission ratio. More specifically, the present invention describes a system for transmitting power from a vehicle's engine to its wheels, in a continuously variable manner, located between the driving axle and the driven axle of the vehicle.
  • a gear system designed to transmit the vehicle's power to its wheels is known as a transmission or gearbox.
  • the main types of transmissions for vehicles are: manual transmission and automatic transmission, the latter of which can be of the CVT (Continuously Variable Transmission) type or continuously variable transmission.
  • CVT automatic transmissions simulate infinite gear ratios. This transmission works with a set of belts connected by two variable-size pulleys. Cones, toroids, and other ingenious solutions are also used to transmit power in a continuously variable manner to the wheels, setting the vehicle in motion.
  • Document BR PI1106964-3 (Alan Miranda Monteiro de Lima) describes an inertial continuously variable automatic transmission, whose vehicle gear change control occurs as a function of the torque generated by the engine and the vehicle speed. This system is characterized by the need for a lock for the reduction system to work, which reduces its efficiency.
  • the present invention describes an inertial continuously variable transmission and differential capable of transmitting engine power to the wheels of a vehicle, resulting in a CVT type automatic transmission, in which the control of speed and torque at the wheels is a function of the output load, the power generated by the engine and the instantaneous speed of the vehicle.
  • the torque balance between the output shaft and the turbine of the modified torque converter makes this transmission work like a CVT.
  • This torque/speed balance between the output shaft and the turbine is made according to the instantaneous load at the output (inertia) and the power generated by the engine, and at all times the system is naturally fed back by the instantaneous inertia of the vehicle.
  • Figure 1 - shows a three-dimensional external side view of the transmission that is the object of the present invention, including the input shaft, the external housing, the modified torque converter and the output shaft;
  • Figure 2 - shows a three-dimensional perspective view of the transmission that is the object of the present invention, with the input shaft in the foreground, without showing the side area of the external housing, thus allowing the visualization of the components housed inside the transmission;
  • Figure 4 - shows an exploded three-dimensional perspective view of the transmission components, without showing the side area of the outer casing;
  • Figure 5 - shows an exploded three-dimensional perspective view of the modified torque converter with the housing in the foreground
  • Figure 6 - shows an exploded three-dimensional perspective view of the modified torque converter with the turbine in the foreground
  • Figure 8 - shows a graph demonstrating an example of the behavior of the rotation of the output shaft of the inertial and differential continuously variable transmission, which is the object of the present invention.
  • Said Continuously Variable Inertial and Differential Transmission (T), object of the present invention comprises:
  • a cover (250) which serves as a cover for the ring gear (240) and has a movement in solidarity with it;
  • stator (420) located between the turbine (410) and the pump (430), responsible for redirecting the hydraulic fluid that comes out of the turbine (410) in the direction of rotation of the pump (430), remaining fixed to the vehicle's casing;
  • a lock-up which performs the physical coupling between the casing (405), the turbine (410) and the pump (430) when they are rotating at cruising speed, allowing them to rotate together without slipping between them.
  • the modified torque converter (400), object of the present invention presents an innovative design being crossed in its entire length by the output shaft (300), which rotates freely inside it and is fixed only to the pump (430), which is positioned in the center of the device, and the turbine (410) is coupled peripherally to the housing (405), presenting movement in solidarity with it.
  • the ring gear (240) rotates in the opposite direction to the input shaft (100), and passes the power to the ring gear output gear (260);
  • the output shaft (300) turns the vehicle wheels and the pump (430) of the modified torque converter (400) at the same time, since the pump (430) is fixed to the output shaft (300);
  • the pump (430) of the modified torque converter (400) drives the turbine (410) of the modified torque converter (400), which rotates the outer housing (200), which rotates the differential carrier (280), causing the differential (270) to rotate;
  • the differential (270) divides the power between the output gear of the ring gear (260) and the output shaft (300), decreasing the rotation of the ring gear (240) in the opposite direction to the input shaft (100), thus increasing the rotation of the output shaft (300).
  • the modified torque converter (400) transforms torque into speed or speed into torque, according to the vehicle's inertia and the engine's power. If the load at the output is high, most of the torque goes directly to the wheels and the vehicle will be in low gears, and if the load is low, some of the torque goes to the pump (430) and turbine (410) of the modified torque converter (400), and the vehicle will be in high gears.
  • the power generated by the engine enters the system through the input shaft (100) and the sun gear (210), and has its rotation reduced and its torque increased by the planetary gears (220), being transmitted by the ring gear (240) and to the differential (270) via the output gear of the ring gear (260).
  • the differential (270) in turn transmits the power to the output shaft (300), which carries the power to the wheels and/or to the pump (430) of the modified torque converter (400).
  • the output shaft (300) starts to transfer part of the torque (what is in excess) to the pump (430) of the modified torque converter (400), which starts to turn the turbine (410), and as this is fixed to the external casing (200), it also starts to turn, turning the differential support (280), which turns the output shaft (300), feeding back into the system and changing gears according to the output load and the engine power.
  • the result of this inertial feedback can be speed, torque or a combination of speed and torque, according to the vehicle's inertia and engine power.
  • This succession of power transfer in the Inertial and Differential Continuously Variable Transmission (T) occurs at all times.
  • the first gear being the planetary reduction and the other gear ratios will be the sum of the rotations generated by the sun gears (210), planetary gears (220) and ring gear (240), and by the turbine (410) of the torque converter (400) rotating the external housing (200) and the differential support (280), rotating the output shaft (300).
  • the present invention uses the relative movement between the ring gear (240) and the outer casing (200), since the ring gear (240) is inside the outer casing (200), when the outer casing (200) starts to rotate, the ring gear (240) also rotates, and when both are at the same rotation, we are in a 1: 1 gear ratio.
  • Equations (1) and (2) are for common planetary gears and equation (3) is for an automotive differential:
  • the graph of this equation demonstrates the behavior of the output shaft rotation (300) of the Inertial and Differential Continuously Variable Transmission (T), using an input rotation maintained constantly at 200 RPM on a straight line path without slopes or inclines.
  • stator (420) As the stator (420) is fixed to the vehicle's frame, it exerts an external reaction force on the system, diverting the flow of hydraulic fluid in the direction of rotation of the pump (430) and multiplying its torque on the turbine (410). So we can see that the efficiency will also depend on the torque multiplication factor of the modified torque converter (400) used in the Inertial Continuously Variable Transmission and Differential (T).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

La présente invention concerne une transmission à variation continue inertielle et différentielle (T) apte à transmettre une puissance du moteur aux roues d'un véhicule, donnant lieu à une transmission automatique de type CVT, la commande de la vitesse et du couple dans les roues dépendant de la charge en sortie, de la puissance générée par le moteur et de la vitesse instantanée du véhicule. Ladite transmission automatique (T) comprend un réducteur planétaire (220), un différentiel (270) et un convertisseur de couple modifié (400), qui n'a pas pour fonction de transférer la puissance mais de multiplier le couple et de déterminer les rapports de vitesse appropriés, fonctionnant comme un capteur inertiel. Ces composants sont montés de manière qu'il n'est plus nécessaire de faire appel à des organes de blocage pour le fonctionnement correct du réducteur planétaire.
PCT/BR2025/050116 2024-04-01 2025-03-28 Transmission à variation continue intertielle et différentielle Pending WO2025208193A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102024006361-9A BR102024006361A2 (pt) 2024-04-01 Transmissão continuamente variável inercial e diferencial
BR1020240063619 2024-04-01

Publications (1)

Publication Number Publication Date
WO2025208193A1 true WO2025208193A1 (fr) 2025-10-09

Family

ID=97265717

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2025/050116 Pending WO2025208193A1 (fr) 2024-04-01 2025-03-28 Transmission à variation continue intertielle et différentielle

Country Status (1)

Country Link
WO (1) WO2025208193A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109551A (en) * 1977-01-12 1978-08-29 Nemec Allen R Variable speed gear ratio transmission apparatus
US4964316A (en) * 1984-08-02 1990-10-23 Perkins Frank M Infinitely variable transmission
US6551207B2 (en) * 2001-06-14 2003-04-22 Sun T. Hong Automatic multi-level transmission for a vehicle
BRPI1106964A2 (pt) * 2011-12-20 2016-01-12 Kraftmittel Technologies Pesquisa Desenv E Tecnol Ind Ltda transmissão automática inercial continuamente variável
US9657822B2 (en) * 2012-11-21 2017-05-23 Hycore Co., Ltd. Input synthesis gear system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109551A (en) * 1977-01-12 1978-08-29 Nemec Allen R Variable speed gear ratio transmission apparatus
US4964316A (en) * 1984-08-02 1990-10-23 Perkins Frank M Infinitely variable transmission
US6551207B2 (en) * 2001-06-14 2003-04-22 Sun T. Hong Automatic multi-level transmission for a vehicle
BRPI1106964A2 (pt) * 2011-12-20 2016-01-12 Kraftmittel Technologies Pesquisa Desenv E Tecnol Ind Ltda transmissão automática inercial continuamente variável
US9657822B2 (en) * 2012-11-21 2017-05-23 Hycore Co., Ltd. Input synthesis gear system

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