1991-09-01

Emission Control Strategies for Small Utility Engines 911807

Recent approval of emission standards for small utility engines by the California Air Resources Board(1)* suggests that substantial reductions in emissions from small utility engines will soon be required. While 1994 standards may be met with simple engine adjustments or modifications, 1999 standards are much more stringent and may require the use of catalysts in conjunction with other emission reduction technologies. Assessing the feasibility of candidate emission control strategies is an important first step.Various emission reduction technologies were applied to three different 4-stroke engines. Emission tests were conducted to determine the effectiveness of air/fuel ratio changes, thermal oxidation, exhaust gas recirculation, and catalytic oxidation with and without supplemental air. Results of these evaluations, along with implications for further work, are presented. One engine's emissions were reduced below the levels of 1999 ARB standards.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: Purchase more aerospace standards and aerospace material specifications and save! AeroPaks off a customized subscription plan that lets you pay for just the documents that you need, when you need them.
X