Variation of Both Symmetric and Asymmetric Valve Events on a 4-Valve SI Engine and the Effects on Emissions and Fuel Economy

Paper #:
  • 2000-01-1222

Published:
  • 2000-03-06
Citation:
Ghauri, A., Richardson, S., and Nightingale, C., "Variation of Both Symmetric and Asymmetric Valve Events on a 4-Valve SI Engine and the Effects on Emissions and Fuel Economy," SAE Technical Paper 2000-01-1222, 2000, https://doi.org/10.4271/2000-01-1222.
Pages:
17
Abstract:
Mechanisms exist to vary valve lift, duration and phasing either simultaneously or individually but it remains a challenge to find the optimum settings. An experimental investigation involving a statistical approach has been applied to a 4-litre, 90° vee-8, 4-valve engine in which intake valve lift, duration and phasing were chosen as variables along with exhaust valve phasing. The intake valves were operated symmetrically for the first phase of testing, but subsequently asymmetric operation was also investigated. The results indicated possible strategies that could be applied to reduce emissions.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Article
2017-03-13
Training / Education
1999-09-27
Training / Education
2010-08-03