HYDRAULIC CONTROL SYSTEM FOR AUTOMATIC TRANSMISSION WITH SHOCKLESS 4-3 SHIFTING WELL AS SHOCKLESS 2-3 SHIFTING

摘要

Disclosed herein is a hydraulic control system wherein under the control of a servo release changeover valve 23, a line pressure is supplied to a servo release fluid chamber (S/R) for a brake (B2) via a first flow path (434-435-437-444) at a flow rate determined by an orifice (616) during 2-3 shifting, and via a second flow path (412-435-437-444) at a flow rate determined by an orifice (617) during 4-3 shifting.