Coast stop vehicle and control method thereof

摘要

A coast stop vehicle which stops an engine during the travel of the vehicle is provided with a variator including a pair of pulleys and a belt mounted between the pulleys and capable of continuously changing a speed ratio. A controller judges whether or not coast stop conditions to stop the engine during the travel of the vehicle hold, stops the engine when the coast stop conditions hold, and prevents the speed ratio from being upshifted to a higher side than a speed ratio at the time of starting the coast stop control during the coast stop control.

主权项

1. A coast stop vehicle configured to stop an engine during a travel of the vehicle, comprising:
a continuously variable transmission including a pair of pulleys and a belt mounted between the pair of pulleys and capable of continuously changing a speed ratio; a coast stop condition judging unit configured to judge whether or not a coast stop condition to stop the engine during the travel of the vehicle holds; a coast stop control unit configured to execute a coast stop control to stop the engine when the coast stop condition holds; and an upshift preventing unit, wherein, during an entire time of the coast stop control, the engine being stopped during the entire time of the coast stop control, the upshift preventing unit is configured to prevent the speed ratio from being upshifted to a higher side than a speed ratio at a time of starting the coast stop control from a beginning of the coast stop control and to continue the prevention of an upshift regardless of the speed ratio in the continuously variable transmission during the coast stop control.