Search Results

This paper describes a new steel-belt continuously variable transmission (CVT) that Jatco put into production in November 2004 for use on front-wheel-drive cars powered by 2.0∼2.5L engines. This new CVT2 model has been developed to replace the existing Hyper-CVT. Its application will be extended to 2.0∼2.5L front-wheel-drive cars on a global basis, beginning initially with use in the Japanese market. And it was turned on to the US market following Japan. The successful development of this CVT2 model has completed for now the lineup of Jatco's new-generation CVT series that also includes the CVT1 and CVT3 for use with 1.4∼1.8L and 3.5L engines, respectively. The technologies developed for the new CVT2 and the improvements made over the previous CVT model are described here.

A diesel particulate filter (DPF) for city buses was developed that combines a SiC filter and a full-flow type burner for regeneration. Filter crack problems were averted by suppressing the peak temperature inside the filter to under 900°C. This was done by setting the maximum tolerable amount of collected particulate mass before regeneration at 50 g and controlling the burner so as to increase the regeneration gas temperature slowly up to a set value. This DPF was retrofitted to a Tokyo metropolitan bus to conduct a field test. The field test has been under way for half a year without any trouble or deterioration of system performance. THE DIESEL PARTICULATE FILTER (DPF) receives much recognition as an effective tool for reducing diesel particulates. However, its practical applications are still quite limited, because to date its durability remains immature.