valvetronic engine technology - IFET College of Engineering

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lower loads and engine speeds. Theconsumption figures the motorist is ableto achieve in this way are comparable tothe fuel economy only a diesel enginewas able to offer just a few years ago.At the same time the new fourcylinderis even more dynamic than itspredecessor, the 316ti now acceleratingwell over a second faster to 100 km/h,achieving this important mark from astandstill in 10.9 seconds. The standingstartkilometer, in turn, comes after 31.6seconds, 1.8 seconds faster than before,and the top speed of the 316ti is now 201km/h or 125 mph, 11 km/h faster thanthe top speed of the former model.Another advantage is theunusually spontaneous response of the316ti to the gas pedal. This isattributable to the simple fact that loadcontrol, to use the technical term for"giving gas", now takes place "rightthere where the action is", that is directlyin the combustion chamber. Thiseliminates the usual time lag between theprocess of "giving gas" and the actualacceleration of the car, which used to beinevitable due to the need to fill theintake manifold between the throttlebutterfly and the combustion chamber.In this respect, Valvetronic evenoutperforms the most advanced conceptsusing individual throttle butterflies, thusoffering an unprecedented combinationof spontaneous engine response andultra-fine dosage of power andperformance under low loads. Perfectly suited for all fuelgradesAnother significant advantage ofValvetronic highly beneficial to thecustomer is that a Valvetronic engineoffers at least the same fuel economy as
the most advanced direct-injection petrolengines without the same compromisesin terms of emissions. Accordingly, the316ti is able to do without the elaborateand so far hardly reliable emissionmanagement technologies still requiredtoday on a direct-injection petrol engine.And it does not require sulfur-free fuellike a direct-injection petrol engine,achieving its superior fuel economy withproven l =1 technology, which allowsthe Valvetronic engine to run on allcommercially available grades of regularpetrol. In other words, the customerenjoys all the consumption-relatedadvantages of Valvetronic also whendriving in countries without anationwide supply of sulfur-free fuel.The consumption figures for the 316tinevertheless relate to the use of premiumfuel with an octane rating of 95 RON.Together with its 63-liter (13.9 Imp gal)fuel tank, the 316ti offers a much longerrange than its predecessor, with extraurbanfuel consumption in the EuropeanEU test cycle of just 5.3 liters for 100kilometers (53.3 Imp gals). This meansthat the driver would only have to refuelafter a very significant 1,188 kilometersor 737 miles.Other AdvantagesAnti-knock control for runningon all fuel grades between 87 and99 octane.Maintenance-free ignition systemwith individual coils. Maintenance-free valve drivewith hydraulic valve playcompensation.A Service Interval Indicator tokeep the cost of service to aminimum A two-mass flywheel formaximum running smoothnessValve drive with roller bearingsthroughout in the interest ofminimum friction and fuelconsumption. Advanced catalysts near theengine in special manifold designfor minimum emissions.In Valvetronic engines coolantflows across the head, resultingin a temperature reduction of60%.The water pump size is cut inhalf, reducing powerconsumption by 60%.The power steering fluid iswarmed quickly, reducing the
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valvetronic engine technology - IFET College of Engineering

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