A Low Cost System for Active Gear Shift and Clutch Control Politecnico di Milano

Format:

Conference/Event

Author/Creator:

Braghin, Braghin, author.

Contributor:

Salis, Francesco

Conference Name:

SAE 2015 World Congress & Exhibition (2015-04-21 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2015

Summary:

AbstractThe objective of this study is to demonstrate the design and construction of an innovative active gear-shift and clutch for racecars, applied to a Formula Student car, based on the use of DC gear-motors. Racecars require extremely quick gear-shifts and every system to be as light as possible. The proposed solution is designed to reduce energy consumption, weight and improve gear-shift precision compared to traditionally employed electro-hydraulic solutions, although maintaining state of the art performances. The proposed gear motor actuation satisfies all the above objectives: energy can be saved by removing the need for power when clutch is not pulled, thus improving efficiency; by substituting the entire electro-hydraulic-systems, that accounts for approximately 5% of the overall car weight (10kg); a significant weight reduction is achieved (weight is reduced to 2kg); a fine actuation force modulation, in order to properly shift to neutral, can easily obtained with an DC electric motor; and, above all, shifting time is less than 20ms. System modeling, regulator design, based on PI-control, and simulation were carried out. Electronics, both signal and power, micro-controller based design and program coding, written in C language, were the next steps. Finally, accurate tests to validate the solution and assess performances were carried out

Notes:

Vendor supplied data

Publisher Number:

2015-01-0228

Access Restriction:

Restricted for use by site license