Method for exiting an engine-idle driving mode in a heavy...

Details Method for exiting an engine-idle driving mode in a heavy... Method for exiting an engine-idle driving mode in a heavy...

2006-05-22

2011-11-22

Estremsky, Sherry (Department: 3655)

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

C477S111000

Reexamination Certificate

active

08062179

ABSTRACT:
Method for exiting an engine-idle driving mode in a heavy land vehicle having an automatic transmission. The engine-idle driving mode is established in the vehicle when the engine is running substantially constantly at idle speed and a gear is engaged propelling the vehicle at a corresponding substantially constant, relatively slow vehicle speed. The method includes receiving a driver request, when in engine-idle driving mode, to accelerate from the prevailing substantially constant, relatively slow vehicle speed. The engine torque requirement is assessed for delivering the requested acceleration that can be developed from the engine while maintaining the automatic transmission in the same gear in which engine-idle driving is taking place. The requested acceleration is delivered by increasing the engine's torque output and without downshifting the automatic transmission.

REFERENCES:
patent: 5863277 (1999-01-01), Melbourne
patent: 2005/0143877 (2005-06-01), Cikanek et al.
patent: 2005/0221950 (2005-10-01), Eriksson et al.
patent: 2006/0063642 (2006-03-01), Hawkins
patent: 63199952 (1988-08-01), None
patent: 2277944 (1990-11-01), None
International Search Report for corresponding International Application PCT/SE2006/000600, Aug. 29, 2006.

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