Claims:We Claim:

1. A continuously variable transmission (1000) for a vehicle comprising of a front pulley (100), a rear pulley (200), and a belt (300)
wherein,
- the front pulley (100) is connected to the rear pulley (200) via the belt (300) with the front pulley (100) having a movable sheave (10), a fixed plate (20), a ratchet kick starter (30), a nut (35), a friction plate (40), a clutch plate (45), a movable sheave (50), a roller container (60), a ramp plate (70), a rolling mass (80) and a rubber shoe (90), and the rear pulley (200) having a movable sheave (210), a helical groove (210HG), a pin (210P), a spring cup (220), a spring (230), a flange nut (235) and a fixed sheave (250);
- the movable sheave (10) of the front pulley (100) is movably mounted on a cylindrical sleeve (SL) which in turn is positioned on a shaft (SF), the movable sheave (50) is movably mounted on the cylindrical portion of the left movable sheave (10) and the roller container (60) also is mounted on the cylindrical portion of the movable sheave (10) and located on the right of the movable sheave (50) and a spring (25B) is positioned between the roller container (60) and the movable sheave (50) on the movable sheave (10);
- the ramp plate (70) of the front pulley (100) is fixedly mounted onto the shaft (SF) on the right of the cylindrical sleeve (SL), the rolling mass (80) is positioned on the ramp plate (70) between the left surface of the ramp plate (70) and the right surface of the roller container (60), the rubber shoe (90) is mounted on the projection of the ramp plate (70) fixedly linking the ramp plate (70) with a socket in the right surface of the roller container (60);
- the fixed plate (20) of the front pulley (100) is fixedly mounted on the shaft (SF) on the left of the movable sheave (10), a spring (25A) is located on the shaft (SF) between the fixed plate (20) and the movable sheave (10), the ratchet kick starter (30) is mounted on the shaft (SF) to the left of the fixed plate (70), a nut (35) is mounted on the threads given on the shaft (SF) to the left of the ratchet kick starter (30);
- the friction plates (40A, 40B) of the front pulley (100) are fixed on the left hand side flat surface of the movable sheave (10) and the right hand side flat surface of the movable sheave (50) respectively and the clutch plates (45A, 45B) of the front pulley (100) are fixed on the left hand side flat surface of the roller container (60) and the right hand side flat surface of the fixed plate (20) respectively;
- the fixed sheave (250) of the rear pulley (200) is supported on the right side of the shaft (SR) by a large diameter portion of the shaft (SR), the fixed sheave (250) is fixed in its position by means selected from a nut (255A) that is mounted on the threads given on the shaft (SR) on the left of the position of the fixed sheave (250) or by welding the fixed sheave (250) onto the shaft (SR); and
- the movable sheave (210) of the rear pulley (200) is movably mounted on the shaft (SR) on the left of the fixed sheave (250), the spring cup (220) is in turn mounted on the cylindrical portion of the movable sheave (210), one end of the spring (230) is supported on the flat surface of the spring cup (220), the flange nut (235) is mounted on threads given on the shaft (SR) on the left of the movable sheave (210) and the other end of the spring (230) is supported on the flat surface of the flange nut (235).

2. The continuously variable transmission (1000) as claimed in claim 1, wherein the front pulley (100) has a pair of bushes (15A and 15B) mounted within either cylindrical ends of the movable sheave (10) and located between the movable sheave (10) and the sleeve (SL).

3. The continuously variable transmission (1000) as claimed in claim 2, wherein the front pulley (100) has a bush (65A) mounted within one cylindrical end of the roller container (60) and located between the roller container (60) and the movable sheave (10).

4. The continuously variable transmission (1000) as claimed in claim 3, wherein the front pulley (100) has a bush (55A) mounted within the cylindrical portion of the movable sheave (50) and located between the movable sheave (50) and the movable sheave (10).

5. The continuously variable transmission (1000) as claimed in claim 4, wherein the rear pulley (200) has a pair of O-rings (210O1 and 210O2) on either ends of the outer cylindrical portion of the movable sheave (210) and located between the movable sheave (210) and the spring cup (220).

6. The continuously variable transmission (1000) as claimed in claim 5, wherein the rear pulley (200) has a pair of flexible rings (210R1 and 210R2) on either ends of the inner cylindrical portion of the movable sheave (210) and located between the movable sheave (210) and the shaft (SR).

7. The continuously variable transmission (1000) as claimed in claim 6, wherein the rear pulley (200) has at least a pin (210P) fixed on the shaft (SR) through helical grooves (210HG) given on the cylindrical portion of the movable sheave (210).

8. The continuously variable transmission (1000) as claimed in claim 7, wherein the front pulley (100) is provided with a cooling plate (100CP) having a plurality of cooling ribs (100CR), the plurality of cooling ribs (100CR) are given on a radial flat surface (100RFS) of the cooling plate (100CP) and the cooling plate (100CP) is mounted on the fixed plate (20) by means of the holding pins (100HP) passing through mounting holes (100MH) given on a radial inclined surface (100RIS) of the cooling plate (100CP) and matching holes (20MH) given on the fixed plate (20).

, Description:FORM 2
The Patent Act 1970
(39 of 1970)
&
The Patent Rules, 2005

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

TITLE OF THE INVENTION
“CONTINUOUSLY VARIABLE TRANSMISSION FOR A VEHICLE”

Endurance Technologies Limited
E-92, M.I.D.C. Industrial Area, Waluj,
Aurangabad – 431136, Maharashtra, India

The following specification particularly describes and ascertains the nature of this invention and the manner in which it is to be performed.

Field of Invention

[001] The present invention is related to transmission system for a motor vehicle. More particularly, the invention is related to a continuously variable transmission, wherein the pulleys of the continuously variable transmission are provided with features to allow them to transmit torque and remove frictional heat more efficiently.

Background of the Invention

[002] Belt slippage within a conventional continuously variable transmission (CVT) has been a long and persistent problem that has consistently evaded resolution for a long time. Normally engineers have managed this problem by increasing the clamping force that pulleys apply on the belt to hold it firmly between there fixed and moving halves. As there are a practical limits on how much clamping force can be increased without applying unbearable stress on the belt, this solution has been only partially effective in eliminating this problem.

[003] The conventional solution for belt slippage problem has hence created demand for belts that are lot stronger and lot costlier than commonly available belts. These belts have to be able to tolerate fluctuation (due to wide variety of reasons) in power being transmitted through them. They also have to be able to handle the heat generated due friction between them and the driving and driven pulleys. The problem of heat generation in itself has added the requirement for an efficient lubrication mechanism to lubricate and cool the CVTs. The overall result of all these issues has been the increase in complexity and cost of the conventional continuously variable transmissions.
[004] Even though existing features are effective in managing these issues, they have sometimes required usage of costly electronic sensor, controller and actuator arrangements that have further limited but not eliminated this problem. Usage of hydraulic, pneumatic or screw based actuators to consistently apply the required clamping force has created another problem of wastage of valuable engine power in motor vehicles. Consequently, these limitations have prevented wider adoption of CVTs in motor vehicles. Therefore, there exists need for an economical CVT that can transmit greater amount of torque using conventional belts, which is able remove heat effectively even if it is not consistently lubricated and also passively adapt itself to changes that may happen during periods of long continuous use.

[005] In order to overcome the cited issues and provide other advantages as would become clear in the description of this invention, there is need for a Continuously Variable Transmission that is economical to provide and that has greater torque transmission efficiency than existing CVTs.

Objectives of the Invention

[006] The main object of the present invention is to provide a CVT that can transmit greater amount of torque using existing belts.

[007] Another object of the present invention is to provide a CVT for a vehicle that responds faster to changes in engine RPM.

[008] Still the object of the invention is to provide a CVT for a vehicle wherein said CVT unit eliminates the judder / vibrations in the transmission system.
[009] Further object of the invention is to provide a CVT for a vehicle that removes heat generated during its operation even if it is not consistently lubricated.

[0010] Yet the object of the present invention is to provide a CVT that can passively adapt to changes that may happen during the period of long continuous use and is economical in nature.

Summary of the Invention

[0011] With above objectives in view, the current invention provides a continuously variable transmission for a motor vehicle comprising of a front pulley, a rear pulley, a belt, wherein, the front pulley is connected to the rear pulley via the belt with the front pulley having a left movable sheave, a fixed plate, a ratchet kick starter, a nut, a friction plate, a clutch plate, a right movable sheave, a roller container, a ramp plate, a rolling mass and a rubber shoe, and the rear pulley having a rear left movable sheave, a helical groove, a pin, a spring cup, a spring, a flange nut and a rear right fixed sheave.

[0012] The movable sheave of the front pulley is movably mounted on a cylindrical sleeve which in turn is positioned on a shaft, another movable sheave is movably mounted on the cylindrical portion of the left movable sheave and the roller container also is mounted on the cylindrical portion of the movable sheave and located on the right of the right movable sheave and a spring is positioned between the roller container and the right movable sheave on the movable sheave; the ramp plate of the front pulley is fixedly mounted onto the shaft on the right of the cylindrical sleeve, the rolling mass is positioned on the ramp plate between the left surface of the ramp plate and the right surface of the roller container, the rubber shoe is mounted on the projection of the ramp plate fixedly linking the ramp plate with a socket in the right surface of the roller container; the fixed plate of the front pulley is fixedly mounted on the shaft on the left of the left movable sheave, a spring is located on the shaft between the fixed plate and the left movable sheave, the ratchet kick starter is mounted on the shaft to the left of the fixed plate, a nut is mounted on the threads given on the shaft to the left of the ratchet kick starter; the friction plates of the front pulley are fixed on the left hand side flat surface of the left movable sheave and the right hand side flat surface of the right movable sheave respectively and the clutch plates of the front pulley are fixed on the left hand side flat surface of the roller container and the right hand side flat surface of the fixed plate respectively.

[0013] The rear right fixed sheave of the rear pulley is supported on the right side of the shaft by a large diameter portion of the shaft, the rear right fixed sheave is fixed in its position by means selected from a nut that is mounted on the threads given on the shaft on the left of the position of the rear right fixed sheave and that of welding the rear right fixed sheave onto the shaft; and the rear left movable sheave of the rear pulley is movably mounted on the shaft of the rear right fixed sheave, the spring cup is in turn mounted on the cylindrical portion of the rear left movable sheave, one end of the spring is supported on the flat surface of the spring cup, the flange nut is mounted on threads given on the shaft on the left of the rear left movable sheave and the other end of the spring is supported on the flat surface of the flange nut.

[0014] Typically, on the front pulley a pair of bushes are mounted within either cylindrical ends of the left movable sheave and located between the left movable sheave and the sleeve. A bush is mounted within one cylindrical end of the roller container and located between the roller container and the left movable sheave. Another bush is mounted within the cylindrical portion of the right movable sheave and located between the right movable sheave and the left movable sheave.

[0015] Typically, a pair of O-rings is mounted on either ends of the outer cylindrical portion of the rear left movable sheave of the rear pulley and is located between the rear left movable sheave and the spring cup. A pair of flexible rings is mounted on either ends of the inner cylindrical portion of the rear left movable sheave and located between the rear left movable sheave and the shaft. Pins are fixed on the shaft through helical grooves given on the cylindrical portion of the rear left movable sheave of the rear pulley.

[0016] Typically, the front pulley is provided with a cooling plate having a plurality of cooling ribs, the plurality of cooling ribs are given on a radial flat surface of the cooling plate and the cooling plate is mounted on the fixed plate by means of the holding pins passing through mounting holes given on a radial inclined surface of the cooling plate and matching holes given on the fixed plate.

Brief Description of the Drawings

[0017] This invention is illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein and advantages thereof will be better understood from the following description when read with reference to the following drawings, wherein

[0018] Figure 1a and 1b illustrate the position of a fully assembled CVT on the vehicle in accordance with an embodiment of the present invention.

[0019] Figure 2 discloses a cut section diagram of a CVT in accordance with an embodiment of the present invention.

[0020] Figure 3 shows a magnified cut section diagram of a front pulley in accordance with an embodiment of the present invention.

[0021] Figure 4 shows a magnified cut section diagram of a rear pulley in accordance with an embodiment of the present invention.

[0022] Figure 5 illustrate a magnified cut section diagram of a front pulley provided with a cooling plate in accordance with an embodiment of the present invention.

[0023] Figure 6a and 6b illustrate the side and top views of the cooling plate provided on the front pulley in accordance with an embodiment of the present invention

[0024] Figure 7 illustrate a magnified cut section diagram of a rear pulley in accordance with an embodiment of the present invention.

[0025] Figure 8a and 8b illustrate magnified views movable sheave of the rear pulley disclosing helical grooves provided thereon in accordance with the present invention.

Detailed Description of the Present Invention

[0026] The invention will now be described in detail with reference to the accompanying drawings which must not be viewed as restricting the scope and ambit of the invention.

[0027] The Figures 1a and 1b indicate the location of the continuously variable transmission (1000) when it has been assembled on a two wheeled motor vehicle. The front pulley (100) as indicated is located along the base of the engine housing and is receiving its input from a rotating shaft (SF) extending horizontally outwards from the engine’s housing (EH). The rear pulley (200) as indicated is located along the axle of the rear wheel and is providing its output to the rear wheel (RW) via a shaft (SR) extending horizontally outwards from the continuously variable transmission (1000)’s outer casing. A belt (300) as indicated the diagrams is connecting the front pulley (100) with the rear pulley (200). The continuously variable transmission (1000) therefore has three main components namely, a front pulley (100), a rear pulley (200) and a belt (300).

[0028] Referring to Figs. 2, 3, 4 and 5, the front pulley (100) comprises of a movable sheave (10), a fixed plate (20), a ratchet kick starter (30), a nut (35), a friction plate (40), a clutch plate (45), another movable sheave (50), a roller container (60), a ramp plate (70), a rolling mass (80) and a rubber shoe (90), and the rear pulley (200) comprises of a movable sheave (210), a helical groove (210HG), a pin (210P), a spring cup (220), a spring (230), a flange nut (235) and a fixed sheave (250).

[0029] The movable sheave (10) of the front pulley (100) is movably mounted on a cylindrical sleeve (SL) which in turn is positioned on a shaft (SF), another movable sheave (50) is movably mounted on the cylindrical portion of the movable sheave (10) and the roller container (60) also is mounted on the cylindrical portion of the movable sheave (10) and located on the right of the movable sheave (50). A spring (25B) is positioned between the roller container (60) and the movable sheave (50) on the movable sheave (10).
[0030] The ramp plate (70) of the front pulley (100) is fixedly mounted onto the shaft (SF) on the right of the cylindrical sleeve (SL), the rolling mass (80) is positioned on the ramp plate (70) between the left surface of the ramp plate (70) and the right surface of the roller container (60), the rubber shoe (90) is mounted on the projection of the ramp plate (70) fixedly linking the ramp plate (70) with a socket in the right surface of the roller container (60).

[0031] The fixed plate (20) of the front pulley (100) is fixedly mounted on the shaft (SF) on the left of the movable sheave (10), a spring (25A) is located on the shaft (SF) between the fixed plate (20) and the movable sheave (10), the ratchet kick starter (30) is mounted on the shaft (SF) to the left of the fixed plate (70), a nut (35) is mounted on the threads given on the shaft (SF) to the left of the ratchet kick starter (30). The friction plates (40A, 40B) of the front pulley (100) are fixed on the left hand side flat surface of the movable sheave (10) and the right hand side flat surface of the movable sheave (50) respectively and the clutch plates (45A, 45B) of the front pulley (100) are fixed on the left hand side flat surface of the roller container (60) and the right hand side flat surface of the fixed plate (20) respectively.

[0032] The front pulley (100) further has a pair of bushes (15A and 15B) that are mounted within either cylindrical ends of the movable sheave (10) and located between the movable sheave (10) and the sleeve (SL). Another bush (65A) is mounted within one cylindrical end of the roller container (60) and located between the roller container (60) and the movable sheave (10) (refer Fig. 2, 3 and 5). In addition to these features, the front pulley (100) is provided with a cooling plate (100CP) having a plurality of cooling ribs (100CR). The plurality of cooling ribs (100CR) is given on a radial flat surface (100RFS) of the cooling plate (100CP). The cooling plate (100CP) is mounted on the fixed plate (20) by means of the holding pins (100HP) passing through mounting holes (100MH) given on a radial inclined surface (100RIS) of the cooling plate (100CP) and matching holes (20MH) given on the fixed plate (20) (Refer Fig. 5, 6a and 6b).

[0033] Referring to Figs. 2, 4 and 7, the fixed sheave (250) of the rear pulley (200) is supported on the right side of the shaft (SR) by a large diameter portion of the shaft (SR), the fixed sheave (250) is fixed in its position by means selected from a nut (255A) that is mounted on the threads given on the shaft (SR) on the left of the position of the fixed sheave (250) and that of welding the fixed sheave (250) onto the shaft (SR). The movable sheave (210) of the rear pulley (200) is movably mounted on the shaft (SR) on the left of the fixed sheave (250), the spring cup (220) is in turn mounted on the cylindrical portion of the movable sheave (210), one end of the spring (230) is supported on the flat surface of the spring cup (220), the flange nut (235) is mounted on threads given on the shaft (SR) on the left of the movable sheave (210) and the other end of the spring (230) is supported on the flat surface of the flange nut (235).

[0034] Furthermore, the front pulley (100) has a bush (55A) that is mounted within the cylindrical portion of the movable sheave (50) and located between the movable sheave (50) and the movable sheave (10). The rear pulley (200) has a pair of O-rings (210O1 and 210O2) mounted on either ends of the outer cylindrical portion of the movable sheave (210) and located between the movable sheave (210) and the spring cup (220) in annular grooves provided for the same. The rear pulley (200) also has a pair of flexible rings (210R1 and 210R2) mounted on either ends of the inner cylindrical portion of the movable sheave (210) and located between the movable sheave (210) and the shaft (SR) (refer Fig. 2, 4 and 7) in annular grooves provided for the same. The rear pulley (200) additionally has pins (210P) that are fixed on the shaft (SR) through helical grooves (210HG) given on the cylindrical portion of the movable sheave (210) (refer Figures 4, 7, 8a and 8b).

[0035] When the vehicle user input causes engine RPM to increase, the ramp plate (70) also to starts spinning faster as it is rotationally fixed with the shaft (SF). The ramp plate (70) being further rotationally fixed with the roller container (60) through multiple matching projection-receiver structures having the rubber shoes (90) in them, the ramp plate (70) transmits its received torque input to the roller container (60) (refer Figs. 2 and 3). The matching projection-receiver structures rotationally lock the roller container with the ramp plate (70) but does not prevent axial movement with respect to each other. Above structural arrangement causes the rolling masses (80) to begin moving radially outwards, thereby applying a separation force on both the ramp plate (70) inside surface and the roller container (60) inside curved surface interacting with the roller mass (80). With the ramp plate (70)’s axial movement outward movement in one direction being restricted by an increased diameter portion of the shaft (SF), the radial outward movement of the rolling mass (80) primarily causes the roller container (60) to move axially to cause the clutch plate (45A) to come in contact with the friction plate (40B). As the friction plate (40B) is fixed on the movable sheave (50) by the pins (50A), the establishment of contact between the friction plate (40B) and the clutch plate (45A) now starts causing in tandem leftward axial movement of the movable sheave (50) as well. The belt (300) being in contact with inclined belt facing surfaces of the movable sheave (50) and the movable sheave (10) transmits the axial force from the movable sheave (50) to the movable sheave (10). This makes the friction plate (40A) (fixed on the outer surface of the movable sheave (10) by pins (10A)) to come in contact with the clutch plate (45B). As the clutch plate (45B) is fixed on the fixed plate (20), any further axial movement of the movable sheave (10) is resisted by a reaction force set up by the fixed plate (20). With the fixed plate (20) being incapable of further outward axial movement due to the presence of the ratchet starter (30) and the nut (35), any further radial outward movement of the roller (80) only causes the magnitude of the axial force acting in axial direction from the outer flat surface of the roller container having the clutch plate (45A) towards the clutch plate (45B) on the fixed plate (20) to rise. With the roller container (60), the movable sheave (50) and the movable sheave (10) being capable of sliding and moving axially, the continued radial outward movement of the rolling mass (80) causes the clamping force acting to force these components together to increase constantly. This in turn causes the torque transmitted across the clutch plates (45A, 45B) and the friction plates (40B, 40A) to also rise constantly. The continuously variable transmission (1000) is therefore better able to transmit torque at a high engine RPM.

[0036] The diameter of the front pulley (100) increases with increasing engine RPM as the belt (300) is made to slide outwards on the inclined surfaces of the movable sheaves (10 and 50). This outward sliding is caused by a component of the force acting via the inclined surfaces of the movable sheaves (10 and 50) on the inclined surfaces of the belt (300).

[0037] When the front pulley (100)’s diameter increases, the belt (300)’s outward movement of the movable sheaves (10 and 50) sets up an axial force on the sheaves (210 and 250) of the rear pulley (200) as well. The fixed sheave (250) being incapable of moving further outwards due to presence of an increased diameter portion of the shaft (SR), it is hence the movable sheave (210) that is primarily made to move axially outwards. The axial outward movement of the movable sheave (210) causes compression of the spring (230). This thereby sets up a restoring force working to cause restoration of the rear pulley (200) to its original pulley diameter when engine RPM decreases.

[0038] The axial outward movement of the movable sheave (210) is guided by the interaction between the pins (210P) fixed on the shaft (SR) with the helical grooves (210HG) given on the cylindrical portion of the movable sheave (210). When the rear pulley (200)’s RPM is increasing, the pins (210P) sliding within the helical grooves (210HG) set up a reaction force on the cylindrical portion of the movable sheave (210). This reaction force acts as the clamping load on the belt (300). It increases during acceleration in a graded manner that is dictated by the slope of the helical groove (210HG). This force is in addition to the clamping force applied by the spring (230).

[0039] When the rear pulley (200)’s RPM begins decreasing, the pins (210P) sliding within the helical grooves (210HG) set up another reaction force on the movable sheave (210). The direction of this reaction force is opposite to that of the reaction force setup during acceleration. The resultant of this reaction force and the restoring force provided by the compressed spring (230) causes the movable sheave (210) quickly move axially inward thereby restoring the movable sheave (210) to its original position (low RPM). The effect of inertia of the rotating masses is therefore counteracted by the spring (230), the pin (210P) and the helical groove (210HG) feature combination given on the rear pulley (200). This gives the continuously variable transmission (1000) a quicker response time to changes in engine RPM.

[0040] With the belt (300) moving back to its original position in between the moveable and fixed sheaves (210 and 250) of the rear pulley (200) under the influence of the spring (230), the pins (210P) and the helical grooves (210HG) feature combination, the axial movement and separation of the movable sheaves (10 and 50) and the roller container (60) on the front pulley (100) is facilitated by the springs (25A and 25B) respectively provided between the fixed plate (20) and the movable sheave (10) and the movable sheaves (50) and the roller container (60). The functioning of the front and rear pulley (100 and 200) while returning to their original positions is synchronized, this prevents sagging of the belt (300). The bushes provided in the front and rear pulleys (100 and 200) function to allow free axial movement of the movables sheaves (10, 50 and 210) provided therein.

[0041] The continuously variable transmission (1000) is provided with a cooling plate (100CP) (refer Fig. 5, 6a and 6b). This cooling plate (100CP) having cooling ribs (100CR) forces a constant stream of ambient air onto the front pulley (100) when fixed plate (20) mounted on the shaft (SF) begins rotating. The air flow over the front pulley (100) removes the heat generated by frictional interaction between the friction plates (40A and 40B) and the clutch plates (45B and 45A) and movable sheaves (10 and 50) and the belt (300). The distribution of frictional heat generating surfaces across both sides of the movable sheaves (10 and 50) allows the front pulley (100) to use its entire mass and surface area to more effectively for removing heat out of the front pulley (100) using the ambient air being circulated by the cooling plate (100CP). The resulting continuously variable transmission (1000) is more resilient and capable of being used continuously for long durations without resulting in wear-and-tear and deterioration of sub-components by the heat generated during its operation. Even if the cooling plate (100CP) is not provided, the distribution of frictional heat generating surfaces across both sides of the movable sheaves (10 and 50) still facilitates increased rate of natural outwards circulation of heat through the entire mass and surface area of the front pulley (100).

[0042] The ratchet kick starter (30) provided on the front pulley (100)’s shaft (SF) in a location adjacent to both the fixed plate (20) and the nut (35), allows a torque to be transmitted across the front pulley (100) via the shaft (SF) to the engine mounted on the motor vehicle (refer Fig. 2, 3 and 5). This feature (the ratchet kick starter (30)) enables the rotation of shaft (SF) during the starting process of the engine without initiating rotation of the front pulley (100) as well. This feature facilitates provision of an engine starting mechanism on the vehicle outward side of the continuously variable transmission (1000).

[0043] The technical advancements and advantages derived from the novel constructional features of the CVT of the present disclosure are as follows:
- The continuously variable transmission (1000) is better able to transmit torque using the available conventional belts across a wide range of engine RPMs.
- The continuously variable transmission (1000) is better able to evacuate heat out of its body without needing a consistent supply of lubrication fluid for this purpose.
- The structural arrangement of CVT unit of the invention drastically reduces the judder / vibrations in the transmission system.
- The continuously variable transmission (1000) is able to passively adapt to heat induced changes due to presence of presence of two movable sheaves (10 and 50) on its front pulley (100) and the combination of features involving the spring (230), the pin (210P) and the helical groove (210HG) provided on the rear pulley (200).
- The combination of features involving the spring (230), the pin (210P) and the helical groove (210HG) provided on the rear pulley (200) allows the continuously variable transmission (1000) to respond faster to changes in engine RPM.

[0044] The foregone description of the specific embodiment reveals the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. In this regard it is additionally stated that, there are multiple conventional means for integrating the rear right fixed sheave (250) on the shaft (SR) and that the cooling plate (100CP) can have different designs of cooling ribs (100CR) than those cited in this disclosure. All the combinations resulting from alteration of these features lie within the scope of the claims pertaining to this invention.

[0045] It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.