valvetronic engine technology - IFET College of Engineering

power unit with its butterfly fully open.Under normal driving conditions,however, throttle-free load managementsignificantly reduces fuel consumptionin practice.CONCLUSIONIn summary, these innovativedevelopments provide a combination ofproduct features thus far inconceivablewith a spark-ignition engine. Theintroduction of the world’s first intakemanifold providing infinite variation inmanifold length serves to improve thetorque level, which is already very goodto begin with. A particular highlight ofengines with Valvetronic loadmanagement is the significantlyimproved fuel/air mixture guaranteeingminimum fuel consumption, maximumspontaneity and optimum refinement.DFI with a stochiometric air/fuelratio provides the highest level ofspecific output as well as a combustionprocess helping to fulfil all exhaustemissions standards worldwide. Allround,general use of the latest directinjectiontechnology, in turn, faces somesignificant drawbacks such as costs, theneed to make the combustion processvery robust and the potentials in exhaustemissions treatment.Valvetronic combines asignificant improvement of fuelconsumption with excellent engineresponse and control, allowing optimumvalve timing under all runningconditions. The result is smooth and freeoperation of the engine under part loadwith very little throttle effect. Optimisedfuel/air mixture management ensuressignificant advantages in fuel efficiencycompared with a conventional fourcylinderengine, reaching the samestandard as today’s lean-burn concepts.Since such an engine with Valvetronicdoes not require an NOx removalcatalyst, it can be used worldwide withall types and grades of fuel.REFERENCES:www.bmwworld.com/technology/valvetronicwww.bmwworld.com/engines/valvetronicwww.wikipedia.org/wiki/valvetronicInternal Combustion Engines bySEMINAR TOPIC FROM ::www.edufive.com/seminartopics.html