Jacobs Vehicle Systems Supports CARB’s latest guidelines for heavy truck emissions
8th July 2020

Jacobs Vehicle Systems responds positively to newly proposed emission reduction strategies by the California Air Resources Board (CARB).

On June 23rd, CARB posted a set of amendments on its website, which are to be discussed at its public meeting on August 27th. The projected emission rule will require that new heavy trucks still using fossil fuels have the most effective emission-control technologies currently available, to further limit smog-forming nitrogen oxide and particulate emissions.

Jacobs is a global manufacturer of diesel and natural gas retarding systems and valve actuation mechanisms. Jacobs is currently involved in numerous emission-reduction development and demonstration projects on commercial vehicle powertrains around the world.

Steve Ernest, vice president of engineering and business development for Jacobs, said:

“Jacobs has been working with customers and industry partners for years to develop solutions to improve engine combustion and aftertreatment efficiency to be ready to respond to these new regulations. We have the technology to help engine and vehicle makers meet these new limits and improve fuel efficiency while doing it.

“We can support meeting these new limits by providing flexibility to the valve train; one of the last ‘fixed’ parameters on current production engines. While clearly a standard test cycle will be key to measuring improvements, the new focus on in-use emissions is clearly targeted at making sure the tightened regulations are met on the road in real-world conditions.”

The CARB amendments, in part, include:

  • A proposal to reduce the current heavy-truck NOx standard from 0.20 grams per brake horsepower hour to 0.050 g/bhp-hr from 2024 to 2026, and even lower to 0.020 g/bhp-hr in 2027.
  • A proposal to reduce heavy-truck particulate matter emissions from its current emission standard of 0.01 g/bhp-hr to a standard of 0.005 for 2024 and subsequent model-year engines.

Recent tests have confirmed that Jacobs’ cylinder deactivation (CDA) engine systems can deliver better fuel economy while keeping diesel exhaust aftertreatment systems operating at optimal temperatures. This supports these proposed goals of reducing nitrogen oxide (NOx) within the CARB HD Omnibus and the EPA Clean Trucks Initiative (CTI), along with lowering CO2 emissions sought by the EPA GHG Phase 2 requirements.

About Jacobs Vehicle Systems

Jacobs Vehicle Systems is headquartered in Bloomfield, Conn., where it has a roughly 30,000 square yard design, testing, and manufacturing facility, with support sites in Europe, Japan, and India as well as manufacturing facilities in Suzhou, China, and Brno, Czech Republic. Jake Brake® products are used by heavy and medium-duty diesel engine manufacturers globally. Registered to the ISO 14001 and IATF16949 standards, Jacobs Vehicle Systems is a leading producer of vehicle retarding and valve actuation technologies and can be found at jakebrake.com.