While Clessie Cummins and business partner William G. Irwin didn’t invent the diesel engine, they saw its budding future and in 1919 started Cummins Engine Co. The diesel engine has undergone several changes and enhancements over the last century, paving the way for more robust and efficient designs. While turbocharged variants of the diesel were first incorporated into trucks in 1954 by MAN and Volvo, the idea didn’t become widely popular until the ’90s. The 5.9L Cummins turbo diesel
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