Design and Optimization of 2-stage Variable Valve Actuation Mechanism for Diesel Engines
|International Journal of Engineering Trends and Technology (IJETT)||
|© 2015 by IJETT Journal|
|Year of Publication : 2015|
|Authors : Ashish Jain, Dr S S Thipse, Dr E Porpatham
|DOI : 10.14445/22315381/IJETT-V28P278|
Ashish Jain, Dr S S Thipse, Dr E Porpatham"Design and Optimization of 2-stage Variable Valve Actuation Mechanism for Diesel Engines", International Journal of Engineering Trends and Technology (IJETT), V28(8),412-422 October 2015. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group
The desire for higher fuel economy, improved performance and drivability expectations of customers from engines are gradually increasing along with stringent emission regulations set by the government. There is customer demand for 4 wheelers having good power, torque and better fuel economy throughout the speed range of vehicle and an implied environmental need of improved emission characteristics. Variable Valve Actuation (VVA) has been applied to many engines in order to enhance the engine performance. Many engine manufacturing companies have started the application of variable valve actuation mechanism in their next generation vehicles. The VVA is a generalized term used to describe any mechanism or method that can alter the shape or timing of a valve lift event within an internal combustion engine. There are various ways to improve to the performance of engine some of which are; supercharging, turbocharging, variable compression ratio, variable intake system geometry, variable valve timing and lift etc. In this work we have concentrated on variable valve timing and lift for diesel engines. This work presents a novel two-step VVA mechanism to facilitate variation in valve timing and lift of base engine. Thus this mechanism helps to divide the operating speed range of engine into two zones i.e. low speed and high speed zone and setting a switch over point, thus helping the engine breath effectively.
 Tim Lacnefield, Ian Methley et. al. ?The Application of Variable
valve timing to a modern diesel engine SAE paper 2000-01-1229.
 G.B. Parvate, H. Hong and B. Gordon ?Analysis of Variable Valve Timing Events and Their Effects on Single Cylinder Diesel Engine SAE paper 2004-01-2965.
 Achuth Munnannur, Song-Charng and Rolf D. Reitz ?Performance Optimization of Diesel Engines with Variable Intake Valve Timing Via Genetic Algorithms SAE paper 2005-01-0374.
 Tetsuya Nakayasu et.al. ?Intake and Exhaust Systems Equipped with a Variable Valve Control Device for Enhancing of Engine Power SAE paper 2001-01-0247.
 Susumu Kohketsu et. al. ?EGR Technologies for a Turbocharged and Intercooled Heavy-Duty Diesel Engine SAE paper 970340.
 Niculae Negurescu et. al. ?Variable Valve – Control Systems for Spark Ignition Engine SAE paper 2001-01-0671.
 Chun Tai, Tsu-Chin Tsao et. al. ?Increasing Torque Output from a Turbodiesel with camless Valvetrain SAE paper 2002-01-1108.
 Jeff Alan and Don Law ?Production ELECTRO-hydraulic Variable Valve-Train for a new Generation of I. C. Engines SAE paper 2002-01-1109.
 Dean H. Kim, Mark D. Anderson, and Tsu-Chin Tsao ?Dyanamic Model of a Springless Electrohydraulic Valvetrain SAE paper 970248.
 Ramssem R. Henry and Bruno Lequesne ?A Novel, Fully Flexible, Electro-Mechanical Engnie Valve Actuation System. SAE paper 970249.
 S. M. Muzakkir, M. G. Patil and Harish Hiran ?Design of Innovative Engine Valve : Background and Need IJETT March 2015, (ISSN : 2277-1581).
 Carmelina Abagnale, Mariano Migliaccio, and Ottavio Pennacchia ?Mechanical Variable Valve Actuation Systems for Motorcycle Engines Proceedings of the World Congress on Engineering 2013 Vol III, WCE 2013.
Variable Valve Actuation, Valve Lift, Speed Zone, Valve Event.