2012 journal article

Impact of Engine Idling on Fuel Use and CO2 Emissions of Nonroad Diesel Construction Equipment


By: P. Lewis n, M. Leming & W. Rasdorf

author keywords: Carbon dioxide; Construction equipment; Emissions; Engines Fuel consumption; Greenhouse gas; Regulations; Equipment management; Pollution management; Fleet management
Source: Web Of Science
Added: August 6, 2018

It is difficult to quantitatively assess the impact of engine idling on fuel use and emissions of construction equipment because of a lack of sufficient data. This paper presents a methodology for evaluating the impact of idling on fuel use and carbon dioxide ( CO2 ) emissions of diesel construction equipment. The results are based on field data collected from 34 items of equipment. Engine idle time may be quantified in terms of equipment operational efficiency ( η ), which is defined as the ratio of nonidle time to total equipment use time (nonidle time plus idle time). Using η and the ratio of idle to nonidle fuel use and CO2 emission rates ( r ), the percentage increase in the total quantities of fuel used and CO2 emitted ( NE ) were calculated for each item of equipment for values of η less than the maximum theoretical operational efficiency of 100%. Results showed that as η decreased (or idle time increased), NE increased. A mathematical model that uses η as a predictor variable was developed to esti...