Manual or robotized gearbox`s sliding sleeve controlling method for motor vehicle, involves forming hydrodynamic lubrication film between sidewall of sleeve and shoe, where film has thickness higher than total heights of nibs of surfaces

摘要

#CMT# #/CMT# The method involves forming a hydrodynamic lubrication film between a sidewall (42) of a sliding sleeve (12) and a shoe (36), where the lubrication film has thickness higher than total heights of nibs of surfaces that support each other through the lubrication film. The lubrication film is maintained due to projection of an access region inclined to form a convergent passage permitting to obtain pressure in lubricating oil, where the pressure is sufficient to maintain the shoe separated from the sidewall. #CMT# : #/CMT# Independent claims are also included for the following: (1) a sliding sleeve controlling device comprising a support face (2) a gearbox comprising a sliding sleeve. #CMT#USE : #/CMT# Used for controlling a sliding sleeve of a manual or robotized gearbox of a motor vehicle in translation along a rotational axis of the sliding sleeve with the help of a shift fork shaped control unit (claimed). #CMT#ADVANTAGE : #/CMT# The hydrodynamic lubrication film is formed between the sidewall of the sliding sleeve and the shoe, where the lubrication film has thickness higher than total heights of nibs of surfaces that support each other through the lubrication film, thus avoiding solid contacts between the surfaces, and limiting wear of the surfaces, and hence improving service life of the control unit. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a sectional view of a gearbox of a motor vehicle. 8 : Pinion 12 : Sliding sleeve 14 : Ring 36 : Shoe 42, 44 : Sidewalls.