Fuel Consumption Estimation for Vehicle Conﬁguration Optimization
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Bränsleförbrukningssimuleringar för optimering av fordonsspeciﬁkationer (Swedish)
Fuel consumption is one of the factors that are considered when deciding a vehicle’s optimal speciﬁcation. In order to swiftly estimate the fuel consumed during real world driving scenarios, a simulation tool has been developed that is well suited for vehicle conﬁguration exploration applications. The simulation method described in this paper diﬀers from the static calculation method currently in use at Scania cv since the dynamic translation of the vehicle is considered, yet the simulation time is kept low. By adopting a more dynamic approach, the estimation accuracy is increased and simulation of fuel saving technology, e.g. intelli- gent driver support system, is enabled. In this paper, the modeling and implementation process is described. Diﬀerent approaches is discussed and the choices made during the development is presented. In order to achieve a low simulation time and obtain a good compatability with Scania’s current software application, some of the inﬂuencial factors have been omitted from the model or described using simple relations. The validation of the fuel consumption estimation indicates an accuracy within three percent for motorway driving. Utilizing the newly devised simulation tool, a look-ahead cruise controller has been implemented and simulated. Instead of continuously ﬁnding the optimal control signals during the driving scenario like most look-aheadcontrollers, a dynamic programming algorithm is used to ﬁnd a fuel eﬃcient speed proﬁle for the entire route. The speed proﬁle is used as the reference speed for a conventional cruise controller and comparison with another simulation tool indicates that this is a fast and accurate way to emulate a real look-ahead controller.
Place, publisher, year, edition, pages
2014. , 50 p.
Fuel consumption, Computer simulation, Heavy duty vehicle, Vehicle optimization, Look- ahead control
IdentifiersURN: urn:nbn:se:liu:diva-112259ISRN: LiTH-ISY-EX--14/4775--SEOAI: oai:DiVA.org:liu-112259DiVA: diva2:764652
Scania CV AB
Subject / course