Design and Development of Variable Valve Actuation (VVA) Mechanism Concept for Multi-Cylinder Engine

2015-26-0021

01/14/2015

Event
Symposium on International Automotive Technology 2015
Authors Abstract
Content
The desire for higher fuel economy, improved performance and driveability expectations of customers from engines are gradually increasing along with stringent emission regulations set by the government. Many original engine manufacturing companies are prompted to consider the application of higher function variable valve actuation mechanisms in their next generation vehicles as a solution.
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. The VVA allows lift, duration or timing (in various combinations) of the intake and/or exhaust valves to be changed while the engine is in operation. Engine designers are prompted to consider Variable Valve Actuation (VVA) system because of the inherent compromises with fixed valve events. The major goal of a VVA engine is to control the amount of air inducted into the engine which is a direct measure of torque.
This work presents a novel two-step VVA mechanism to facilitate variation in valve timing and lift of base engine. The mechanism helps the engine breathe effectively by changing the valve timing and lift after the set switch-over point engine speed, by dividing the operating range of engine into two zones viz, low speed and high speed zone.
Meta TagsDetails
DOI
https://doi.org/10.4271/2015-26-0021
Pages
12
Citation
Jain, A., Tikar, S., Ramdasi, S., Thipse, S. et al., "Design and Development of Variable Valve Actuation (VVA) Mechanism Concept for Multi-Cylinder Engine," SAE Technical Paper 2015-26-0021, 2015, https://doi.org/10.4271/2015-26-0021.
Additional Details
Publisher
Published
Jan 14, 2015
Product Code
2015-26-0021
Content Type
Technical Paper
Language
English