Patent ID: 6695744
Filing Date: 2004-02-24
Classification: B60W,F02D,F16H,Y10T

Abstract:
An engine-restart starting control system for a transmission comprising an engine and a speed change mechanism, said engine being controllable to stop under a predetermined condition, and said speed change mechanism transmitting output rotation of said engine at different speed ratios;wherein: said speed change mechanism comprises a plurality of transmission paths arranged in parallel, a plurality of frictionally engaging elements for selecting individually said transmission paths, and engagement-pressure supply control means for selectively supplying a hydraulic pressure to said frictionally engaging elements so as to selectively bring said frictionally engaging elements into engagement; engagement-initiation time required for pressure of a frictionally engaging element to reach a predetermined engagement pressure when the hydraulic pressure is supplied by said engagement-pressure supply control means is calculated for each of said frictionally engaging elements, so that the frictionally engaging element requiring a minimum engagement-initiation time is selected as the frictionally engaging element for a start-up speed ratio; and when said engine is restarted from stopped state, said pressure supply control means directs a supply of oil to the selected frictionally engaging element for the start-up speed ratio.