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If not for his harrowing descent through a California mountain pass in a Cummins diesel-powered truck in August 1931, Clessie L. Cummins might never have invented the Jacobs Engine Brake®. In his retirement during the 1950s, Cummins set about turning his engine into an effective “brake.” His idea revolved around taking advantage of perfectly timed motion already built into Cummins ...

The Detroit Diesel history began in 1938 as the GM Diesel Division.  In 1965 GM Diesel became Detroit Diesel Engine Division then the Detroit Diesel Allision Division was formed.  In 1970  Penske corp. and GM created Detroit Diesel.  In 2000 Daimler-Chrylser acquired Detroit Diesel from Penske.

Daimler Trucks North America was built on a concept as relevant today as it was when the company was founded more than 60 years ago: Build a better vehicle. That challenge has been the driving force behind the company since its inception. In the late 1930s, Leland James, president of Portland, Oregon-based trucking company Consolidated Freightways (CF), sought a lighter, more ...