Scania Cv Ab

Olof Larsson

Fredrik Roos

Mikael Ögren

Linus Bredberg

Johnny Rickman

Methods, systems, and computer program products are provided for control of a combustion engine in a vehicle. At least one future speed profile for an actual speed of the vehicle during a road section is simulated based on information about the road section, and that coasting will be applied during the road section. An applicability for coasting during the road section is evaluated. Subsequently, it is evaluated whether the combustion engine may be shut down during a coasting for at least a part of the road section. The evaluation of the shutdown of the combustion engine is based on whether one or several system conditions for engine shutdown have been met, on one or several properties for one or several brake systems in the vehicle, and on a shutdown period, when the combustion engine could be shut down. The combustion engine is then controlled based on this evaluation.

Control of an combustion engine in a vehicle

The present invention presents a method and a system for the control of preparatory measures during a road section, for at least one system. First, one or several parts of a road section are identified, during which parts one or several engines comprised in the vehicle may be shut down. Such identification is carried out when the road section is ahead of the vehicle, that is to say before the vehicle has entered the road section. The identification is based on available information about the road section. Subsequently it is determined whether at least one preparatory measure for at least one respective system in the vehicle needs to be carried out, in order to facilitate that one or several of the engines may be shut down. Subsequently, the preparatory measures are controlled based on the determination of the need to carry out the at least one preparatory measure.

Control of preparatory measures in a vehicle

Methods and systems are provided for control of a combustion engine in a vehicle. In operation, at least one future speed profile for an actual speed of the vehicle is simulated during a road section ahead based on information about the road section and on knowledge that coasting with the combustion engine shut down will be applied during the road section. Subsequently, based on the future speed profile, a starting point in time is determined, when the combustion engine will need to be started for forward driving the vehicle and/or to brake the vehicle. Subsequently, a starting point brought forward in time is determined based on the need for a forward driving or braking force arising, where the starting point brought forward in time precedes the starting point in time. Subsequently, the combustion engine is controlled to be started at the starting point brought forward in time.

Control of an internal combustion engine in a vehicle

A method for guidance of driver behavior during driving of a vehicle () in hilltop driving: the steps of continuously determining topography along the vehicle's itinerary for determining a profile of the vehicle's speed (v); presenting (S) the vehicle driver with suggestions for action concerning the driving of the vehicle for a desired reduction of fuel consumption, the action includes reduced power mobilization before a hilltop transition. A profile of the vehicle speed (v) is determined as a result of the action, whereby the step of presenting (S) the vehicle's driver with suggestions for said action, is subject to consideration to subconditions. The subconditions include requirements in response to reduced power mobilization, the speed of the vehicle () relative to a reference level (v) should: drop by a predetermined largest amount before the hilltop transition; drop by a predetermined smallest amount before the hilltop transition; reach or exceed the reference level (v) after the hilltop transition. Also disclosed is a system for guidance of driver behavior during driving of a vehicle in hilltop driving, a motor vehicle practicing the method and a system and a computer program for executing the method.

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Stockholm, Sweden

Olof Larsson