Diesel Engine Visible Emissions - Comparison of Tractor and Road Vehicle Standards

Abstract

The paper presents an analysis of two visible emissions standards for tractor and road vehicle diesel engines. For a certified emission diesel engine according to road use (ECE Regulation 24), it is presented the procedure of certification according to tractor use (Directive 77/537/EEC). Experimental work was performed on the dynamometric bench being measured declared performances and emissions. Some discussions are made on light absorption coefficients- measures and limits.