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Emissions from 4-Cycle Walk-Behind-Mower Engines: Test Cycle Effects
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Abstract
The paper presents emissions data obtained from three 4-stroke lawn mower engines that were tested using three test cycles: a six mode steady-state test, a quasi-steady-state test, and a transient test. A comparison of emissions from the three test cycles is made for non-methane organic gases, carbon monoxide, nitrogen oxides, detailed hydrocarbons (percent of total organic emissions that are paraffin, olefin, aromatic, or acetylene), and toxic compounds (benzene, 1,3-butadiene, formaldehyde, and acetaldehyde). Differences in ozone potential are also determined and reported for each test cycle. The engines tested are all unregulated (not certified to any emission standard), in-use engines that have a wide range of emission rates. Results indicate that hydrocarbon emission rates are statistically higher with the transient test cycle compared to the steady-state test. Overall, regulated emission rate differences due to test cycle are fairly small with no difference exceeding 20 percent Unregulated emission rates and organic composition, except for carbon dioxide, appear not particularly sensitive to test cycle selection.
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Gabele, P., "Emissions from 4-Cycle Walk-Behind-Mower Engines: Test Cycle Effects," SAE Technical Paper 972793, 1997, https://doi.org/10.4271/972793.Also In
References
- “Test Procedure for the Measurement of Gaseous Exhaust Emissions from Small Utility Engines” SAE Recommended Practice J1088 Warrendale, PA February 1993
- Carpenter, T. Buszkiewicz, T. Trimble, T. “Transient versus steady-state test procedure evaluation of 4-cycle utility engines,” EPA regulation negotiation test procedure task group November 1994 gabele.peter@epamail.epa.gov
- Sun, X. Brereton, G. Morrison, K. Patterson, D. “Emissions Analysis of Small Utility Engines,” SAE Technical Paper No. 952080 March 1995
- Hare, C.T. Carroll, J.N. “Reactivity of Exhaust Emissions from a Small Two-Stroke Engine and a Small Four-Stroke Engine Operating on Gasoline and LPG,” Small Engine Technology Conference, SAE Technical Paper No. 931540 Pisa, Italy December 1993
- Hare, C.T. White, J.J. “Toward the Environmentally-Friendly Small Engine: Fuel, Lubricant, and Emission Measurement Issues,” Small Engine Technology Conference, SAE Technical Paper No. 911222 Yokohama, Japan October 1991
- White, J.W. Carroll, J.N. Hare, C.T. Lourenco, J.G. “Emission Factors for Small Utility Engines,” SAE Technical Paper No. 910560 March 1991
- Hare, C.T. White, J.J. “A Next Generation Emission Test Procedure for Small Utility Engines - Part 1, Background and Approach,” SAE Technical Paper No. 901595 Milwaukee, WI September 1990
- Gabele, P.A. “Exhaust Emissions from Four-Stroke Lawn Mower Engines,” JA&WMA September 1997 gabele.peter@epamail.epa.gov
- Federal Register “Control of Air Pollution; Emission for New Nonroad Spark-Ignition Engines At or Below 19 Kilowatts;” Fed. Reg. 40 CFR Part 86, Final Rule July 3 1995
- Siegl, W.O. Richert, J.F.O. Jensen, T.E. Schuetzle, D. Swarin, S.J. Loo, J.F. Prostak, A. Nagy, D. Schlenker, A.M. “Improved Emissions Speciation Methodology for Phase II of the Auto/Oil Air Quality Research Program - Hydrocarbons and Oxygenates,” SAE Technical Paper No. 930142 October 1993
- Carter, W.P.L. Atkinson, R.J. “An Experimental Study of Incremental Hydrocarbon Reactivity,” Environ. Sci. Technol. 21 864 880 1987
- Lowi, Alvin Jr. Carter, W. P. L. “A Method for Evaluating the Atmospheric Ozone Impact of Actual Vehicle Emissions,” SAE Technical Paper No. 900710 March 1990