Diesel will power --I 21st century CVs
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• Diesel engines will continue to be the first choice in British trucks well into the next century, according to a top engineering design firm.
Ricardo's Giles Hundleby says diesel rather than alternative fuel will power most engines, although environmental imperatives are likely to mean a fuel efficiency penalty.
He says that Euro3 NOx levels can be reached by retarding the timing on diesels, but this increases particulates and worsens fuel consumption by 10-12%. The favoured option is to introduce exhaust gas recirculation (EGR) on heavy diesels, but the current "13 mode" EC emissions test cycle for heavy vehicle engines concentrates on full-load operation, which causes problems. Variable turbocharger geometry and electronic control will overcome these problems, says Hundleby, but they may still harm fuel consumption.