초록 ▼

A shift control system for a continuously variable transmission, in which a road load on a vehicle is detected, the lower limit speed is set according to the detected road load, in which a target input speed, as set according to the running state of a vehicle, is restricted with the set lower limit

A shift control system for a continuously variable transmission, in which a road load on a vehicle is detected, the lower limit speed is set according to the detected road load, in which a target input speed, as set according to the running state of a vehicle, is restricted with the set lower limit speed, and in which the gear ratio of the continuously variable transmission is controlled so that the actual input speed may be equal to the target input speed restricted. The target input speed is restricted after the actual input speed is more than the lower limit value, when the road load is light, and said target input speed is restricted irrespective of the actual input speed when the road load is heavy.

대표청구항 ▼

1. A shift control system for a continuously variable transmission to control a gear ratio so that an actual input speed may be equal to a target input speed, comprising:road load detector for detecting a road load on a vehicle; lower limit speed setter for setting a lower limit speed according to a

1. A shift control system for a continuously variable transmission to control a gear ratio so that an actual input speed may be equal to a target input speed, comprising:road load detector for detecting a road load on a vehicle; lower limit speed setter for setting a lower limit speed according to a detected road load; restrictor for restricting said target input speed on condition that the actual input speed is more than said lower limit speed, when said road load is light, and for restricting said target input speed irrespective of said condition when said road load is heavy; and gear ratio controller for controlling the gear ratio of the continuously variable transmission so that the actual input speed may be equal to the target input speed restricted.