Title:
AUTOMATIC TRANSMISSION
Document Type and Number:
Japanese Patent JPS6275157
Kind Code:
A
Abstract:
PURPOSE:To reduce a rapid shock sensed by the human body, by providing the second orifice having a bore smaller than that of the first orifice so that the pressure of oil to a brake slowly rises up to the line pressure even if an engine speed is increased by performing a speed change from an N or P shift to an R shift. CONSTITUTION:An oil path to a brake B2 is formed such that the first orifice 31 and a B2 control valve are provided in an oil line 11 communicating with an oil line 10 from a pump 1 through a manual valve. Said first orifice 31, being formed in a large bore for controlling the pressure by the B2 control valve immediately after a speed change to an R shift, serves to prevent a time lag from being prolonged when the speed changed is performed. And an oil line 13 between a 2-3 shifts valve and the B2 control valve provides the second orifice 33 having a bore smaller than that of the first orifice 31 so that the pressure of oil to the brake B2 slowly starts to increase to the line pressure.
Inventors:
ISHIKAWA KAZUO
YOSHIKAWA NORINARI
YOSHIKAWA NORINARI
Application Number:
JP21697385A
Publication Date:
April 07, 1987
Filing Date:
September 30, 1985
Export Citation:
Assignee:
AISIN SEIKI
International Classes:
F16D57/00; F16H63/02; F16H63/12; (IPC1-7): F16H5/12; F16H57/06
Domestic Patent References:
| JPS59183153A | 1984-10-18 | |||
| JPS53100359A | 1978-09-01 |
Attorney, Agent or Firm:
Kuwahara Hideaki