Method of controlling speed reduction ratio for continuously var

Details Method of controlling speed reduction ratio for continuously var Method of controlling speed reduction ratio for continuously var

1988-10-19

1991-03-26

Look, Edward K.

Power plants

Pressure fluid source and motor

Methods of operation

60487, 74866, 3644241, F16H 6142

Patent

active

050019007

ABSTRACT:
A method of controlling a speed reduction ratio in a continuously variable speed transmission comprises detecting a vehicle speed when a vehicle is decelerated by utilizing an engine brake with an accelerator opening being essentially zero, determining a reference speed reduction ratio corresponding to the detected vehicle speed, detecting an actual vehicle speed change rate, detecting an allowable vehicle speed change rate, comparing the actual change rate with said allowable vehicle speed change rate, determining a corrected speed reduction ratio by adding a correction to the reference speed reduction ratio based on a difference between the actual vehicle speed change rate and the allowable vehicle speed change rate, and controlling the speed reduction ratio of the continuously variable speed transmission so as to coincide with the corrected speed reduction ratio.

REFERENCES:
patent: 4370904 (1983-02-01), Muller et al.
patent: 4589302 (1986-05-01), Oda et al.
patent: 4641553 (1987-02-01), Kobayashi
patent: 4665775 (1987-05-01), Nagamatsu et al.
patent: 4689956 (1987-09-01), Hein
patent: 4701853 (1987-10-01), Osanai
patent: 4750598 (1988-06-01), Danno et al.
patent: 4753133 (1988-06-01), Itoh et al.
patent: 4846019 (1989-07-01), Kumura

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