Fuel economy analysis of part-load variable camshaft timing strategies in two modern small-capacity spark ignition engines

F. Bonatesta, G. Altamore, J. Kalsi and M. Cary

Applied Energy, 2016, vol. 164, issue C, 475-491

Abstract: Variable Camshaft Timing strategies have been investigated at part-load operating conditions in two 3-cylinder, 1.0-litre, Spark Ignition engines. The two small-size engines are different variants of the same 4-valve/cylinder, pent-roof design platform. The first engine is naturally aspirated, port fuel injection and features high nominal compression ratio of 12:1. The second one is the turbo-charged, direct injection version, featuring lower compression ratio of 10:1. The aim of the investigation has been to identify optimal camshaft timing strategies which maximise engine thermal efficiency through improvements in brake specific fuel consumption at fixed engine load.

Keywords: Variable camshaft timing; Variable valve timing; Down-sized engine; Cylinder charge dilution; Direct injection; Fuel economy (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (8)

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DOI: 10.1016/j.apenergy.2015.11.057

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