초록 ▼

In a vehicle provided with a continuously variable transmission, when a target speed change ratio sharply decreases due to the release of an accelerator pedal from depression, a real speed change ratio of the continuously variable transmission which follows the target speed change ratio may undersho

In a vehicle provided with a continuously variable transmission, when a target speed change ratio sharply decreases due to the release of an accelerator pedal from depression, a real speed change ratio of the continuously variable transmission which follows the target speed change ratio may undershoot the target speed change ratio. Due to this undershoot, the engine rotation speed may temporarily fall below a permitted level. Therefore, the variation rate of the speed change ratio of the transmission is decreased in the terminal phase of the shifting process of the speed change ratio.

대표청구항 ▼

[What is claimed:] [1.]a sensor for detecting a degree of the depression of said accelerator pedal; anda microprocessor programmed to:calculate a target speed change ratio according to the degree of the depression of said accelerator pedal;vary the specified speed change ratio of said transmission t

[What is claimed:] [1.]a sensor for detecting a degree of the depression of said accelerator pedal; anda microprocessor programmed to:calculate a target speed change ratio according to the degree of the depression of said accelerator pedal;vary the specified speed change ratio of said transmission to said target speed change ratio at a predetermined response sensitivity,determine if said accelerator pedal has been released from the depression based on the detected degree of the depression of said accelerator pedal, anddecrease said response sensitivity during a process of changing over of said target speed change ratios before and after the accelerator pedal is released from the depression.