Engine brake enhanced upshift control method/system

Details Engine brake enhanced upshift control method/system Engine brake enhanced upshift control method/system

1994-01-07

1995-06-20

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477 70, 477118, 477904, 74335, B60K 4118, F16H 5948, F16H 5970

Patent

active

054256895

ABSTRACT:
A control system/method for an at least partially automated mechanical transmission system (10), inclading a controller (106) operated engine brake (EB), is provided. The control system/method is effective to determine if selected upshifts into a target gear ratio are feasible (212, 214) or not feasible (216) under current vehicle operating conditions and to prohibit the initiation of not feasible selected upshifts. The transmission system includes an engine brake actuator (23A) operable by the system controller (106). selected upshifts are evaluated and will be implemented, if feasible, in a sequence wherein feasibility is a function of engine deceleration (dES/dt), and engine deceleration is assigned expected values at minimum to progressively greater engine braking.

REFERENCES:
patent: 4361060 (1982-11-01), Smyth
patent: 4467427 (1984-08-01), Magnusson
patent: 4595986 (1986-07-01), Daubenspeck et al.
patent: 4648290 (1987-03-01), Dunkley et al.
patent: 4765201 (1988-08-01), Ishiguro et al.
patent: 5053961 (1991-10-01), Genise
patent: 5053962 (1991-10-01), Genise
patent: 5089965 (1992-02-01), Braun
patent: 5335566 (1994-08-01), Genise et al.

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