# US 10,308,106 B2 · Traction system for hybrid vehicles

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- Number: US 10,308,106 B2
- Document ID: US10308106B2
- Status: Granted
- Kind: B2
- Application number: 15/031,357
- Filed: 2014-10-23
- Published: 2016-09-08
- Granted: 2019-06-04
- Earliest claimed: 2013-10-23
- Applicants: Antonio Francisco Cesaroni
- Inventors: Antonio Francisco Cesaroni
- Web page: https://patentgrep.com/patent/US10308106B2

## CPC

- B60K 6/543: the transmission being a continuously variable transmission
- B60K 6/365: with the gears having orbital motion
- B60K 6/48: Parallel type
- F16H 15/38: with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces
- F16H 37/021: {toothed gearing combined with continuously variable friction gearing}
- F16H 37/0806: {with a plurality of driving or driven shafts}
- F16H 37/086: {CVT using two coaxial friction members cooperating with at least one intermediate friction member}
- B60K 2006/4808: {Electric machine connected or connectable to gearbox output shaft}
- B60Y 2200/92: Hybrid vehicles
- B60Y 2400/72: Continous variable transmissions [CVT]
- B60Y 2400/80: Differentials
- F16H 2037/088: {Power-split transmissions with summing differentials, with the input of the CVT connected or connectable to the input shaft}
- Y02T 10/62: Hybrid vehicles
- Y10S 903/911: with two or more gear sets
- Y10S 903/918: Continuously variable
- Y10S 903/945: Characterized by control of gearing, e.g. control of transmission ratio
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- F16H: GEARING
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A traction system for vehicles comprises a first power source of the non-reversible type, a second power source of the reversible type and a transmission which is connected to the power sources and which includes a first differential device. The transmission further comprises a speed variator which is interposed between the first source and the first differential device and which comprises a continuous speed variation device, and a second differential device. The continuous speed variation device is of the toroidal friction wheel type and comprises a lateral motion input disc, a lateral motion output disc and at least two idle oscillating friction roller members. The lateral motion input and output discs have a friction surface of toroidal shape and the idle oscillating roller members have a friction surface shaped in the form of a spherical dome.

## Claims

### Claim 1

A traction system (10) for vehicles, comprising:
a first non-reversible power source (22);
a second reversible power source (18);
a transmission (100) which is connected to the first source (22) and second source (18) and which includes a first differential device (34) connected or connectable to the first power source (22) and second power source (18) and to an axle (30) of a vehicle;
wherein the transmission (100) comprises a speed variator (56), interposed between the first power source (22) and the first differential device (34), which comprises:
a continuous speed variation device (246);
a second differential device (42) connected to the continuous speed variation device (246), to the first source (18), and to the first differential device (34);
wherein the continuous speed variation device (246) comprises:
an input friction disc (266) connected to the first source (18),
an output friction disc (270) connected to the second differential device (42), and
at least two idle oscillating friction roller members (268);
the input and output friction discs (266, 270) having a friction surface of toroidal shape and the at least two idle oscillating roller members (268) having a friction surface shaped in the form of a spherical dome;
wherein at least one of the friction disks (266, 270) is capable of displacement along a radial direction and further comprises a pair of intermediate disks (266′, 266″), each intermediate disk (266′, 266″) being capable of movement along a radial direction, one intermediate disk (266′) being capable of movement along a direction which is perpendicular to the other intermediate disk (266″).

### Claim 2 (depends on 1)

The traction system (10) according to claim 1, wherein the input friction disc (266) and the lateral motion output disc (270) have a toroidal shaped friction surface.

### Claim 3 (depends on 1)

The traction system (10) according to claim 1, wherein the idle roller members (268) are in contact with the input friction disc (266) and the output friction disc (270) at contact locations located in positions opposite each other with respect to the axis of rotation of the idle roller member (268).

### Claim 4 (depends on 3)

The traction system (10) according to claim 3, wherein the axis of rotation of the idle roller members (268) is substantially perpendicular to the axis of rotation of the input and output friction discs (266, 270) when the continuous speed variation device (246) has a transmission ratio of 1.

### Claim 5 (depends on 1)

The traction system (10) according to claim 1, wherein the input and output friction discs (266, 270) are connected to a respective member (102, 110) of the second differential device (42).

### Claim 6 (depends on 5)

The traction system (10) according to claim 5, wherein the first differential device (34) has a first member (50) connected to the second differential device (42), a second member (118) connected to the second source (18), and a third member (130) connected to the axle (30) of the vehicle.

### Claim 7 (depends on 1)

The traction system (10) according to claim 1, further comprising a control device (62), associated for operation with the continuous speed variation device (246), such that a transmission ratio between the input and output friction discs (266, 270) is varied as a function of conditions of motion of the vehicle.

### Claim 8 (depends on 1)

The traction system (10) according to claim 1, wherein the traction system (10) comprises at least three roller member (268).

### Claim 9 (depends on 8)

The traction system (10) according to claim 8, wherein the at least three roller members (268) are arranged at 120 degrees between them.

### Claim 10 (depends on 1)

The traction system (10) according to claim 1, further comprising a complementary disk (269, 271), interposed between the friction disk (266, 270) and the roller members (268) and a axial cam (280) transmitting torque between the friction disk (266, 270) and complementary disk (269, 271) and shaped such that a preload is provided to the at least two roller members (268) when torque is transmitted.