| 摘要 |
In a vehicle comprising a continuously variable transmission, an engine braking force is increased or decreased via speed ratio control. First, a first target speed ratio is determined based on a vehicle speed. Information relating to vehicle running conditions is acquired, and the first target speed ratio is modified to a second target speed ratio according to this information by controlling the speed ratio of the continuously variable transmission to the second target speed ratio. Hence, the optimum engine braking force is obtained according to the running conditions.
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