An Experimental Single Cylinder “ECCLINK” VCR Engine

Paper #:
  • 921695

Published:
  • 1992-09-01
Citation:
Douglas, R., Currie, J., Chopra, A., and Ma, T., "An Experimental Single Cylinder “ECCLINK” VCR Engine," SAE Technical Paper 921695, 1992, https://doi.org/10.4271/921695.
Pages:
14
Abstract:
The improvement in both performance and thermal efficiency of internal combustion engines at higher compression ratios is a well known phenomena. Indeed, a simple Otto Cycle analysis show a potential efficiency improvement of 13% by increasing the compression ratio from 9:1 to 15:1. However, the dilemma for engineers has always been in the realization of a practical operational mechanism.This paper describes the ECCLINK VCR mechanism which enables compression ratio to be altered within given limits on a running engine. A single cylinder 500 cm3 four-stroke research engine, incorporating the ECCLINK mechanism, has been built and tested. Results are presented at both full load and part load over a range of compression ratios, showing improvements in performance and fuel economy. Of particular interest is the fact that full load bsfc improvements equate to typical Otto cycle values.
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

Technical Paper / Journal Article
2010-10-25
Training / Education
2018-03-26
Article
2017-03-13