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MEMA Supports EPA Efforts to Update Some Heavy Duty Vehicle Testing and Technical Improvements

Date: June 30, 2020

MEMA provided brief comments to the U.S. Environmental Protection Agency (EPA) regarding improvements for heavy duty engine and vehicle test procedures and other amendments on June 26.

“The motor vehicle supplier industry provides solutions for clean mobility and is committed to providing affordable technologies needed to increase fuel efficiency and continue to reduce greenhouse gas (GHG) and criteria pollutant emissions from vehicles,” the statement said.

MEMA went on to say the industry supports:

  • Proposed changes to heavy-duty vehicle testing and calibration.
  • The proposed update to the powertrain test procedures for HD hybrids. However, motor vehicle suppliers may need to demonstrate these hybrid technologies through testing. As a result, MEMA encourages the agency to publish these specific procedures and calculation methods for increased transparency for the whole industry.
  • The EPA’s proposed updates to OBD for engines used in vehicles greater than 14,000 pounds gross vehicle weight rating (GVWR). However, MEMA recommends the EPA include additional specification from California Air Resources Board’s (CARB) OBD regulation, which defines requirements for an engine receiving vehicle speed information from a transmission control unit.

“MEMA supports the agency’s proposed technical improvements to HDV and engines,” the statement concludes. “Since motor vehicle suppliers play a role in the development of many of these technologies, MEMA provides recommendations for improving some of the updates by including more of the values and processes for increased transparency and adding one of CARB’s HDV OBD requirements for the engine to receive vehicle speed from the transmission.”

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