Transmission system with a continuously variable transmission ratio

US7395143B2 · kind B2 · utility

Assignee

• C.R.F. SOCIETA' CONSORTILE PER AZIONI · IT

Inventors

• Franco Villata · Torino, IT
• Antonino Fratta · Torino, IT
• Alfredo Vagati · Venaria Reale, IT
• Gian Mario Pellegrino · Torino, IT
• Angela Del Gobbo · Torino, IT
• Liborio Tarquinio · Villetta Barrea, IT
• Stefano Re Fiorentin · Grugliasco, IT

Key dates

• Filing date: Dec 11, 2002
• Grant date: Jul 1, 2008
• Expiry date: Jan 29, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S903/945
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The system (CVT) includes a first electrical machine (M1) with a first rotor (R1) provided with a multiphase winding (W1) and fixed firmly to the shaft (1) of the internal combustion engine (ICE) and a second rotor (R2) or intermediate rotor coaxial with the first rotor (R1) and carrying first magnetic means (PM1) operatively cooperating with the winding (W1) of the first rotor (R1), the intermediate rotor (R2) being coupled with at least one axle (2) of the motor vehicle, and a second rotary electrical machine (M2) coaxial with the first (M1) and including a stator (ST), which is arranged on the opposite side of the intermediate rotor (R2) to the first rotor (R1) and is provided with a multiphase winding (W2), as well as the intermediate rotor (R2) which also carries second magnetic means operatively cooperating with the winding (W2) of the stator (ST), a first inverter and a second inverter (I1, I2) of which the a.c. sides are connected to the winding (W1) of the rotor (R1) and to the winding (W2) of the stator (ST), respectively, and the respective d.c. sides are connected in parallel with one another by means of a d.c. voltage link (L), sensors (S1-Sn) suitable for providing el…