Demonstrating the Performance and Emission Characteristics of a Variable Compression Ratio, Alvar- Cycle Engine

Paper #:
  • 982682

Published:
  • 1998-10-19
Citation:
Erlandsson, O., Lundholm, G., Söderberg, F., Johansson, B. et al., "Demonstrating the Performance and Emission Characteristics of a Variable Compression Ratio, Alvar- Cycle Engine," SAE Technical Paper 982682, 1998, https://doi.org/10.4271/982682.
Pages:
12
Abstract:
This paper is a direct continuation of a previous study that addressed the performance and design of a variable compression engine, the Alvar-Cycle Engine [1]. The earlier study was presented at the SAE International Conference and Exposition in Detroit during February 23-26, 1998 as SAE paper 981027. In the present paper test results from a single cylinder prototype are reviewed and compared with a similar conventional engine. Efficiency and emissions are shown as function of speed, load, and compression ratio. The influence of residual gas on knock characteristics is shown. The potential for high power density through heavy supercharging is analyzed.
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