The Development of Small Formula-Style Racing Car in Osaka university Formula RAcing Club 2007-32-0122

A fuel supply system and characteristics of CVT (Continuously Variable Transmission) were changed to get better dynamic performance of an engine and axle output, respectively. A fuel supply system were changed from carburetor to fuel injection to improve an engine power. Engine power and torque with fuel injection system were higher than that with carburetor system by approximately 19% and 21%, respectively. In the power transmission system, the effect of spring constant of pressure spring and weight of flyweight on engagement speed and shift speed were investigated to improve an acceleration performance. Engagement speed and shift speed were higher as spring constant of pressure spring increases and weight of flyweight decreases, respectively.