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MTZ industrial

, Volume 7, Issue 2, pp 56–60 | Cite as

Dual-fuel Engines — An Elegant Alternative for Tier 4f Compliance

  • Ryan D. Johnson
  • Timothy J. Callahan
  • David P. Branyon
  • David P. Meyers
Research Emissions
  • 73 Downloads

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.

1 Motivation

The U.S. Environmental Protection Agency’s (EPA) Tier 4 Final (4f) emissions standards for large (>560 kW) non-road engines came into effect at the beginning of 2015. However, flexibility provisions allow the use of Tier 2 engines through 2017 [ 1, 2]. As such, manufacturers are just now entering the production phase for >560 kW non-road Tier 4f engines in earnest. These regulations are listed in Table 1for non-genset diesel engines...

References

  1. [1]
    Environmental Protection Agency: Control of Emissions from New and In-use Nonroad Compression-ignition Engines. 40 CFR 1039.101Google Scholar
  2. [2]
    Environmental Protection Agency: Control of Emissions from New and In-use Nonroad Compression-ignition Engines. 40 CFR 1039.625Google Scholar
  3. [3]
    U.S. Energy Information Administration: Annual Energy Outlook 2017. Published 2017Google Scholar
  4. [4]
    Roecker, R. et al.: State-Based Diesel Fueling for Improved Transient Response in a Dual-Fuel-Engine. CIMAC paper No. 161, CIMAC Congress, Helsinki, 2016Google Scholar
  5. [5]
    Environmental Protection Agency: Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles — Phase 2. 81 Fed. Reg. 73478 (October 25, 2016)Google Scholar

Copyright information

© Springer Fachmedien Wiesbaden GmbH 2017

Authors and Affiliations

  • Ryan D. Johnson
    • 1
  • Timothy J. Callahan
    • 1
  • David P. Branyon
    • 1
  • David P. Meyers
    • 1
  1. 1.Southwest Research InstituteSan AntonioUSA

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