A method and system for controlling a motor vehicle

A method and system for controlling a motor vehicle (1, fig 1A) during an exit from a free rolling phase of operation, comprises adjusting an engine (2) speed to match an input speed of a transmission (3) so as to provide a smooth exit from the free rolling phase of operation to a normal phase of op...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Peter George Brittle, Themi Philemon Petridis, Ian Halleron, Martin Robekowski
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLETECHNOLOGY LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT THERMAL INSULATION IN GENERAL TRANSPORTING VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A method and system for controlling a motor vehicle (1, fig 1A) during an exit from a free rolling phase of operation, comprises adjusting an engine (2) speed to match an input speed of a transmission (3) so as to provide a smooth exit from the free rolling phase of operation to a normal phase of operation. The input speed of the transmission (3) is calculated based upon a composite final drive ratio, the gear ratio of the transmission (3) chosen for the exit and a speed at which the motor vehicle 1 is travelling. A predictive gear sensing system determines a next gear to be engaged and this ratio is used in calculating the input speed of the transmission (3). During the free rolling phase a clutch (10) is disengaged and the transmission (3) is in gear.