valvetronic engine technology - IFET College of Engineering

power used by the hydraulicpump.Mounting the water and powerpump on the same shaft and aheat exchanger between coolantand engine oil reduces oiltemperature by 30%.BMW has successfullycompleted this quantum leap intechnology, even in the light of ademanding product developmentprocess. An important task in thisprocess is to reduce the productdevelopment period to just 30 months.This applies to all new products. Afurther objective is to reduce the amountof hardware required and provide abroad knowledge base for the newValvetronic technology, the know-howacquired in this process serving todevelop this technology to an evenhigher standard with new functions.Computer aided exercise (CAx)-basedmethods and three-dimensionalcalculations were applied consistently inthis project, ensuring successfulapplication of the new technology in thecar despite the high level of productcomplexity. This new mechatronicsystem calls for multi-parameter loadmanagement requiring the introductionof new control algorithms and new, evenmore efficient, engine management.DisadvantagesFacing such a high standard ofsoftware and hardware complexity, amanufacturer obviously also runs agreater risk of making mistakes. It isessential to acquire a sufficient stock ofdata under all kinds of operatingconditions in order to understand howsuch a new system behaves. However,such data cannot be provided by theusual sequential test runs.All-round, general use of thelatest direct-injection technology, inturn, faces some significant drawbackssuch as costs, the need to make thecombustion process very robust and thepotentials in exhaust emissionstreatment.EXPERIMENTAL RESULTS First Working ModelThe first BMW model to enterthe market in 2001 with a largeproductionspark-ignition enginefeaturing fully variable Valvetronic andVanos valve control was the 316ti