Development of new CVT for K-Car

Abstract

A continuously variable transmission (CVT) adopting a parallel-shaft, helical gear primary reduction mechanism for greater transmission efficiency was developed for K-car use. The distance between the input shaft and output shaft in the front-to-back direction was reduced and the hydraulic control system was positioned all together below the transmission. This supported the reduction of engine compartment size and, by extension, contributed to the extended length of the K-car cabin interior. Two types of 0.66-L engine, naturally aspirated (NA) and turbocharged (TC), are supported, as well as two-wheel drive (2WD) and fourwheel drive (4WD) systems, with a minimum configuration of special parts. Idle stop was also supported with just the addition of an electric oil pump. © Springer-Verlag 2013.