Method and arrangement for fuel quantity adjustment in connectio

Details Method and arrangement for fuel quantity adjustment in connectio Method and arrangement for fuel quantity adjustment in connectio

1995-03-16

1998-05-19

Louis-Jacques, Jacques

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

701 51, 701104, 477121, 477124, 477135, 477148, 74336R, G06G 770, F16H 5930

Patent

active

057549680

ABSTRACT:
The invention relates to an improved method and arrangement for implementing that method, for obtaining in motor vehicles with mechanical stepped gearboxes with automatic gear changing a gentle and quiet engine adjustment during downshifts in normal operating situations and automatically in operating situations where a need for quicker downshifts requires quicker engine synchronisation. In normal operating situations, downshifts involve using only a limited fuel quantity, preferably corresponding to 20% of full-load fuel quantity, in order to raise the engine speed to the synchronous speed for the next gear, resulting in quieter engine adjustment without the occurrence of obvious disturbance of comfort, risk of losing downshifts or safety disadvantages. When there is a need for quicker gear changes, which is detected by any of the following conditions:

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