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Evaporative Emissions Control System for Walk Behind Lawnmowers
Technical Paper
2007-32-0053
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English
Abstract
This paper discusses an evaporative emissions control system which significantly reduces diurnal evaporative emissions in walk behind lawnmower engines equipped with float carburetors. The system also maintains engine startability, run quality, and a simplistic user interface. The system consists of low-permeation fuel line and a multi-layer fuel tank using an EVOH barrier as well as a carbon canister integrated in the lawnmower's push-handle and an Automatic Bowl Drain System (ABDS). A prototype of the system resulted in a 90% reduction in diurnal evaporative emissions when compared to a pre-regulation walk behind lawnmower using the CARB TP-902 sealed housing for evaporative determination test. This paper demonstrates a practical solution to reduce diurnal evaporative emissions and hydrocarbon running losses below the level emitted from a state of the art, float carbureted, walk behind lawnmower engine.
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Citation
Bejcek, A., "Evaporative Emissions Control System for Walk Behind Lawnmowers," SAE Technical Paper 2007-32-0053, 2007.Also In
References
- California Environmental Protection Agency Air Resources Board “INITIAL STATEMENT OF REASONS FOR PROPOSED RULEMAKING - PUBLIC HEARING TO CONSIDER THE ADOPTION OF EXHAUST AND EVAPORATIVE EMISSION CONTROL REQUIREMENTS FOR SMALL OFF-ROAD EQUIPMENT AND ENGINES LESS THAN OR EQUAL TO 19 KILOWATTS” 39 50 August 8 2003
- California Environmental Protection Agency Air Resources Board “Small Off-Road Engine and Equipment Evaporative Emissions Test Procedure TP - 902” 2004
- Samulski, M. “Characterization and Control of Evaporative Emissions from Fuel Tanks in Nonroad Equipment” SETC 2006 Paper 2006-32-0094 / 20066594 17 2006