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Evaporative Emissions Control System for Walk Behind Lawnmowers
Published October 30, 2007 by Society of Automotive Engineers of Japan in Japan
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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.
CitationBejcek, A., "Evaporative Emissions Control System for Walk Behind Lawnmowers," SAE Technical Paper 2007-32-0053, 2007.
- 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
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