Dual-fuel Engines — An Elegant Alternative for Tier 4f Compliance
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Manufacturers are adding emissions aftertreatment technology to large off-road vehicles to meet the U.S. Environmental Protection Agency’s Tier 4 Final emissions standards. However, these systems introduce additional operating costs, control complexity, packaging difficulties, and maintenance concerns. Southwest Research Institute investigated whether converting to dual-fuel operation could allow these engines to meet the stricter standards, reducing or eliminating the need for emission aftertreatment while cutting product and operating costs.
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