Abstract
Fuel consumption improvement is a big theme of passenger vehicles. A K-car "ALTO ECO" with the best fuel economy among gasoline engine powered vehicles in Japan, 30.2km/L in the JC08 driving cycle, has launched into the Japanese market in December 2011. The engine for ALTO ECO has intensively been improved on its mechanical friction from the base engine called R06A. The R06A engine had originally been developed as a low fuel consumption engine for Japanese K-cars which had launched in January 2011. This paper introduces additional technologies for ALTO ECO mainly focusing on reduction of mechanical friction.
