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1. US20190040951 - METHOD FOR SLIP AVOIDANCE IN A BALL PLANETARY TYPE CONTINUOUSLY VARIABLE TRANSMISSION

Office United States of America
Application Number 16072598
Application Date 26.01.2017
Publication Number 20190040951
Publication Date 07.02.2019
Publication Kind A1
IPC
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
H
GEARING
61
Control functions within change-speed- or reversing-gearings for conveying rotary motion
66
specially adapted for continuously variable gearings
664
Friction gearings
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
H
GEARING
15
Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
48
with members having orbital motion
50
Gearings providing a continuous range of gear ratios
F16H 61/664
F16H 15/50
CPC
F16H 15/503
F16H 2059/147
F16H 61/6649
Applicants DANA LIMITED
Inventors JEFFREY M. DAVID
GORDON M. MCINDOE
THOMAS NEIL MCLEMORE
PATRICK SEXTON
MATTHEW SIMISTER
ROBERT A. SMITHSON
Title
(EN) METHOD FOR SLIP AVOIDANCE IN A BALL PLANETARY TYPE CONTINUOUSLY VARIABLE TRANSMISSION
Abstract
(EN)

Provided herein is a control system for a multiple-mode continuously variable transmission having a ball planetary variator. The control system has a transmission control module configured to receive a plurality of electronic input signals, and to determine a mode of operation from a plurality of control ranges based at least in part on the plurality of electronic input signals. The system also has a dither control module configured to store at least one calibration map, and configured to determine an oscillating change in speed ratio applied to a commanded speed ratio signal during operation of the CVP to manage thermal and mechanical stress on the surface of the ball.