Characterization of infield duty cycles and exhaust emissions from diesel powered off-road heavy-duty equipment

The objective of study was to design, develop, and evaluate techniques to measure exhaust emissions from diesel-powered off road equipment. Emissions data was collected from a Komatsu hydraulic excavator and a Caterpillar track-type tractor.;For the excavator, data was logged during in-field operation, and test cycles were created on a dynamometer test bed using this data. For the tractor, on-board emissions measurement equipment collected mass emissions rate data in field.;Vast differences were found between transient and 8-mode brake-specific test results. Transient cycle HC, CO, CO2, NO, and PM emissions were 50%, 65%, 10%, 35%, and 50% lower than 8-Mode results, respectively. Data collected from the tractor during a 360 second test was 5062 g/cycle CO2, 67.7 g/cycle NOx, and 0.349 g/cycle DPM.;The study concluded that exhaust emissions are vehicle and task specific in nature, and that 8-Mode test results lack the ability to realistically estimate actual in-use engine emissions.

Name thesis:degree_name

MS

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Mechanical and Aerospace Engineering

Year dc:date.available

2002

Author dc:creator

• Rohrbaugh, Jeremiah Christopher

Contributors dc:contributor

• Mridul Gautam.

• Mechanical engineering
• Environmental engineering

Identifier

https://researchrepository.wvu.edu/etd/1289

OAI identifier oai:identifier

oai:researchrepository.wvu.edu:etd-2292