Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Shift control of automatic transmission










Image Number 17 for United States Patent #8386139.

A subtransmission mechanism 30 comprises a Ravigneaux planetary gear mechanism 31, a Low brake 32 and a High clutch 33, shifts between a first speed gear position in which the Low brake 32 is engaged whereas the High clutch 33 is disengaged and a second speed gear position in which the Low brake 32 is disengaged and the High clutch 33 is engaged. A minute slip is caused at the Low brake 32 and then terminated by engaging the High clutch 33. A value representing the engaging state variation such as an engaging time period and/or an engaging speed of the High clutch 33 is learned and the pressure of oil supplied during the engaging operation of the High clutch 33 is corrected based upon the learned value, thereby assuring a smooth shift operation by compensating for any inconsistency in the torque transmission characteristics of the High clutch 33.








 
 
  Recently Added Patents
Method, system and computer program product for verifying floating point divide operation results
Device for preparing a body fluid for a bacteriological analysis
Method and devices for handling access privileges
Feature management of a communication device
Medical capsule housing formed by thermal welding
Method and apparatus for monitoring for a radio link failure
Lamp body with integrally molded heat sink
  Randomly Featured Patents
Boat fenders with internal rope storage capacity
Biplane phased array for ultrasonic medical imaging
Streptavidin-binding peptides and uses thereof
Grounded dual voltage trouble light and extension cord
Molded article with captured fasteners
Compositions of polycondensed branched polyester polymers and aromatic polycarbonates, and the closed cell polymer foams made therefrom
Portable axle and tire assembly
Cover with exhausting attachment for engine driven hand tool
Multi-lumen epidural-spinal needle
Method for dechucking a substrate