Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1991-06-19
1992-08-18
Lorence, Richard
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74878, 3644241, B60K 4118
Patent
active
051389061
ABSTRACT:
A shift control system for an automatic transmission comprises: a first transmission assembly and a second transmission assembly connected in series to each other and individually having frictional engagement elements to be engaged, if subjected to oil pressures, and accumulators for regulating the oil pressures to be applied to the frictional engagement elements, so as to set any one of gear stages by applying the frictional engagement elements of one of the transmission assemblies to shift up the one transmission assembly and by releasing the frictional engagement elements of the other transmission assembly to shift down the other transmission assembly. The shift control system further comprises: a predictor for predicting whether or not the end of the upshift is to be delayed from that of the downshift; and a back pressure controller for boosting up the back pressures of the individual accumulators connected to the frictional engagement elements, simultaneously, on the basis of the fact that the predictor has predicted the delay of the end of the upshift from that of the downshift.
REFERENCES:
patent: 4428258 (1984-01-01), Kubo et al.
patent: 4721018 (1988-01-01), Harada et al.
patent: 4722247 (1988-02-01), Shindo et al.
patent: 4722250 (1988-02-01), Sumiya et al.
patent: 4727772 (1988-03-01), Sumiya et al.
patent: 4751858 (1988-06-01), Iwatsuki
patent: 4843922 (1989-07-01), Kashibara
patent: 4854195 (1989-08-01), Moroto et al.
patent: 4856381 (1989-08-01), Funahashi et al.
patent: 4867014 (1989-09-01), Sugano
patent: 4889016 (1989-12-01), Kuwayama et al.
patent: 4955256 (1990-09-01), Kashibara et al.
patent: 4967244 (1990-10-01), Iwatsuki et al.
Iwatsuki Kunihiro
Kimura Hiromichi
Lorence Richard
Toyota Jidosha & Kabushiki Kaisha
Trousdell William O.
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