Endless belt power transmission systems or components – Pulley with belt-receiving groove formed by drive faces on... – Load responsive
Patent
1989-01-19
1989-10-24
Bui, Thuy M.
Endless belt power transmission systems or components
Pulley with belt-receiving groove formed by drive faces on...
Load responsive
74865, 474 18, F16H 1104
Patent
active
048758922
ABSTRACT:
An apparatus for controlling the speed ratio of a steplessly variable transmission of an automotive vehicle comprises a belt-pulley type of steplessly variable transmission mechanism, a speed ratio control device for steplessly varying the speed ratio of the belt-pulley transmission mechanism according to speed ratio change schedules of a target engine speed relative to a vehicle speed depending upon engine load conditions, and a drive mode change device for changing the steplessly variable transmission in operation between a power drive priority mode and a fuel economy drive priority mode and changing the speed ratio change schedules to two different patterns, one suitable for the power drive priority mode and the other suitable for the economy drive mode according to the change of drive mode.
The speed ratio change schedules are previously established to be identical at a maximum and a minimum engine load between the two drive modes, but, between the maximum and the minimum engine load, to have a high rate of change of the target engine speed relative to change of engine load within a range of low engine loads for the power drive mode and within a range of high engine loads for the economy drive mode or a low ratio of change of the target engine speed relative to change of engine load within a range of high engine loads for the power drive mode and within a range of low engine loads for the economy drive mode.
REFERENCES:
patent: 4704683 (1987-11-01), Osanai
patent: 4718308 (1988-01-01), Haley
patent: 4752277 (1988-06-01), Morimoto
Bui Thuy M.
Mazda Motor Corporation
LandOfFree
Steplessly variable transmission control for automotive vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Steplessly variable transmission control for automotive vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steplessly variable transmission control for automotive vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1586512