Engine speed control system with changing shift-up speed

Details Engine speed control system with changing shift-up speed Engine speed control system with changing shift-up speed

1992-06-05

1994-05-31

Braun, Leslie A.

Interrelated power delivery controls, including engine control

Transmission control

Control by sensed ambient condition, pattern indicia,...

123333, 477115, 477138, F02D 2902

Patent

active

053158970

ABSTRACT:
An engine speed control system causes an engine, equipped with an automatic transmission which shifts up according to predetermined shift schedules, to reduce its output at a predetermined engine speed so as to protect the engine by preventing the engine from being subjected to "over-revolution." The predetermined engine speed is changed according to engine operating conditions such as a decrease in engine temperature. Simultaneously, a shift-up vehicle speed, at which the automatic transmission shifts itself up, is decreased according to engine operating conditions and, more particularly, engine temperatures and throttle openings. As a result, an up-shift of the automatic transmission properly takes place, even when the vehicle travels at lower speeds.

REFERENCES:
patent: 4102316 (1978-07-01), Valbert
patent: 4411174 (1983-10-01), Yokoi et al.
patent: 4474155 (1984-10-01), Sagues
patent: 4638781 (1987-01-01), Shiki et al.
patent: 4998519 (1991-03-01), Kobayashi
patent: 5076116 (1991-12-01), Sasaki
patent: 5113826 (1992-05-01), Anzai
patent: 5233889 (1993-08-01), Iizuka

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