How much more efficiency can suppliers pull out of new diesel engine development? It turns out a lot. Jacobs Vehicle Systems recently announced validation tests of its cylinder deactivation technology paired with developments from Tula Technology, a California based company that specializes in combustion control and software technology, that showed marked improvement in NOx reduction and fuel efficiency. Just how much? Here’s a quote from the most recent announcement: Testing was completed with steady-state mapping to assess the relationship between firing fraction and performance, and emissions parameters of the combustion events to optimize the use of CDA. “At 1000 RPM, diesel DSF shows an increase in exhaust temperature of nearly 100 degrees C while still improving fuel consumption by 25%”, as stated in the paper, along with similar improvements at other operating conditions. To learn more about this technology and find out its next mile marker on the road toward full road worthy validation, I connected with Robb Janak, director of new technologies for Jacobs. Watch the video above for all of the diesel engine cylinder deactivation details.