Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1991-06-27
1992-07-14
Lorence, Richard
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74851, F16H 5914
Patent
active
051292866
ABSTRACT:
An improved powertrain control which recognizes the occurrence of engine speed flare during low torque upshifting, and effectively converts the shift to a power-off upshift via an override of the normal engine torque management controls. The engine spark timing is retarded by a predetermined amount during every power-on upshift for the reasons described above. However, when the occurrence of engine flare is detected, the control increases the spark retard to a maximum valve, substantially eliminating the transmission input torque. As the on-coming element smoothly applies and decelerates the input, the flare condition terminates, and the spark timing is returned to the predetermined amount for completion of the shift.
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patent: 4691285 (1987-09-01), Takeda
patent: 4724723 (1988-02-01), Lockhart et al.
patent: 4809660 (1989-03-01), Marsh et al.
patent: 5038287 (1991-08-01), Taniguchi et al.
patent: 5070747 (1991-12-01), Lentz et al.
patent: 5079970 (1992-01-01), Butts et al.
Milunas Rimas S.
Nitz Larry T.
Lorence Richard
Navarre Mark A.
Saturn Corporation
Ta Khoi Q.
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