How Optimizing Cylinder Deactivation Cut NOx Emissions 74% in Cummins-Tula Test
Cummins Buying Jacobs
Cummins is buying Jacobs Vehicle Systems — which today does far more than exhaust brakes — to help it advance on the road to zero emissions.

Jacobs has two primary manufacturing facilities in Bloomfield, Connecticut, and Suzhou, China, and Cummins expects to invest additional capacity and resources into those operations.
Photo: Jacobs
To help it in development of current and future advanced diesel engine platforms, Cummins is buying Jacobs Vehicle Systems. Best known for the Jake Brake, today Jacobs also provides cylinder deactivation, start-and-stop and thermal management technologies.
It's a homecoming of sorts; in 1961, Jacobs introduced the first engine brake for commercial vehicles, which was invented by Clessie Cummins, the founder of Cummins.
The acquisition is part of Cummins’ continuing investment in key technologies to reduce greenhouse gas emissions and lower the air quality impacts of their products. Engine braking and cylinder deactivation technologies will be key components to meeting current and future emissions regulations. This acquisition will allow Cummins to better integrate these vital components with its medium- and heavy-duty engines. Both Cummins and Jacobs have also been working with Tula to test more sophisticated algorithms for cylinder deactivation technology.
The acquisition of the Altra Industrial Motion subsidiary also secures engine components for current and aftermarket products, and expands the Cummins Turbo Technologies’ business unit, Cummins officials said in a press release.
Jacobs has two primary manufacturing facilities in Bloomfield, Connecticut, and Suzhou, China, and Cummins expects to invest additional capacity and resources into those operations. Jacobs’ manufacturing footprint will help Cummins meet requirements of the United States-Mexico-Canada Agreement and further invest in the U.S.
Jennifer Rumsey, Cummins’ president and chief operating officer, said she expects the transaction to provide financial returns and future growth opportunities through Jacobs’ engineering expertise, product portfolio and manufacturing capabilities.
Cummins plans to maintain Jacobs’ customer relationships.
Founded in 1961, Jacobs has roughly 600 employees and more than 60 years of experience in engine retarding and valve actuation systems for the commercial vehicle industry.
This acquisition is subject to customary closing conditions, including receipt of applicable regulatory approvals, and is expected to close in 2022.
More Equipment

Cummins, Paccar Ease DEF Derates After EPA Guidance
Updated diesel engine software gives truck operators more time to address emissions-system issues while staying compliant with EPA emissions standards.
Read More →
America at 250: How the Truck Helped Connect a Continent
America was founded on revolutionary ideas, but it was built by movement. For 250 years, the nation has depended on ever-better ways to move people, products, and prosperity across a vast continent. No machine has carried that mission further — or more faithfully — than the truck.
Read More →
Mack Unveils America 250 Tribute Truck to Celebrate Nation's Semiquincentennial
Just in time for the Fourth of July! Mack unveils a brand-new patriotic, limited-edition, red, white, and blue truck wrap.
Read More →
Enhance Fleet Performance with High-Efficiency Auxiliary Power Units
Drive sustainable cost savings while increasing driver comfort during short- and long-haul logistics operations.
Read More →
Rush Expands Gulf Coast Peterbilt Network With Louisiana Acquisition
The expanded Rush network gives fleets additional sales, service, leasing and collision repair support across Louisiana's major trucking markets.
Read More →
Photos: Shell SuperRigs Light Up Bristol Tennessee
Kenny Ziglar II of Rawlins, Wyo., captured Best of Show honors for the second consecutive year with his 2007 Peterbilt 379, nicknamed “Scrapin By,” at the 44th Annual Shell Rotella SuperRigs competition held June 25-27 at Bristol Motor Speedway in Bristol, Tenn.
Read More →
Waabi, Volvo Claim Breakthrough in Scaling Autonomous Trucking
Waabi says its AI-powered virtual driver successfully transferred to Volvo Autonomous Solutions' Volvo VNL Autonomous platform without retraining or additional data, a milestone the companies say could dramatically accelerate commercialization of autonomous trucks.
Read More →
Why the Mack Pioneer Signals a New Era in Class 8 Truck Design
After a public-road drive through eastern Pennsylvania, one thing became clear: Mack's new Pioneer isn't simply packed with technology -- it's been engineered around the driver in ways that could redefine long-haul trucking.
Read More →
Mack Defense Secures $47 Million to Continue Military Dump Truck Production
President Trump visited Mack Defense’s Macungie, Pennsylvania, facility on June 23 to tout a $47 million Heavy Dump Truck order.
Read More →
New (Antique) Trucks Take the Spotlight at the Mack Trucks Museum
The Mack Trucks Historical Museum has a slate of new historic vehicles on display this year.
Read More →

