Advanced science.  Applied technology.


Clean Hybrid Electric Diesel Engine (CHEDE)

Building on more than 28 years of the industry's longest running diesel research consortium, the Clean Hybrid Electric Diesel Engine 8 (CHEDE-8) Consortium began in November 2019.

This program is pursuing the world's most efficient powertrain solutions to meet the needs of industry 10-plus years into the future. The four-year multi-client consortium includes consideration of worldwide markets and technology impacts on each. Goals include research and demonstration of technologies to meet the world’s strictest emissions and fuel economy standards.

Powertrain system goals for CHEDE-8:

  • Heavy-Duty: 0.02 g/bhp-hr NOx and EPA 2027 Greenhouse Gas
  • Light-Duty: Euro-VII NOx and 2030 CO2



Areas of Concentration

  1. Hybrid Heavy-Duty Diesel Powertrain
    Research and demonstration of technologies to exceed future fuel economy and emissions regulations through heavy leveraging of electrified powertrains. Focusing on off-road and vocational applications where there are significant opportunities to maximize the use of high-power density engines with highly efficient motor and battery systems.
  2. Conventional Heavy-Duty Diesel
    Evaluation and demonstration of new and innovative ways to improve ICE efficiency. Topics include advanced combustion strategies, smokeless diesel combustion, and novel aftertreatment integration methods. Fundamental architecture, novel waste heat recovery systems and operational approaches are also considered.
  3. High-Efficiency Light-Duty Diesel Powertrain
    Multiple paths that include cost effective LD diesel systems, diesel as part of the future hybrid electric powertrain, emission solutions to meet U.S. SULEV, and CO2-minimized powertrains for Euro-VII and beyond.

Specific Clean Hybrid Electric Diesel Engine Research Areas

  • Advanced modeling and simulation
  • Innovative combustion systems
  • Powertrain energy management
  • Advanced air and EGR systems
  • Waste heat recovery
  • Advanced friction reduction
  • Systems approach to aftertreatment solutions

On-Site Clean Hybrid Electric Diesel Engine Facilities

  • Multiple research engines available
    • 15L, 13L, 6.8L, 2.8L
  • Single-cylinder research engine
  • Optical combustion vessel
  • High-pressure spray laboratory
  • Bearing and liner friction laboratory
  • Battery and advanced electronics laboratory
  • Transmission and driveline evaluation facilities

Membership Details

  • Four-year consortium program, membership renews annually
  • Annual membership fee
    • USD 125,000 for engine and vehicle manufacturers
    • USD 75,000 for suppliers of production engine and vehicle components
    • USD 50,000 for limited members (no IP, no voting rights)
  • Membership includes
    • Access to all data collected
    • Access to monthly progress reports and web calls
    • Participation in three member meetings per year
    • Voting rights to decide future direction of program
    • Royalty-free access to intellectual property developed during consortium
    • Networking opportunities and insight into future technology trends

Upcoming Events

  • CHEDE-8 Spring PAC Meeting, February 22-23, 2021, Southwest Research Institute
  • CHEDE-8 Summer PAC Meeting, June 28-29, 2021, Southwest Research Institute