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Our Customers

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For nearly 50 years, Jacobs has been working with Detroit , beginning with its two-cycle product in the early 1960s. This strong engineering relationship has withstood test of time as the engine brake has evolved from a traditional bolt-on design of the Detroit S60, which began in 1984, to the global engine platform of the DD13, DD15 and DD16 engine brakes in 2007.

The Jacobs Engine Brake Model 720 is a Compression Release Dual Rocker Arm Systems, which has a dedicated braking cam lobe design to optimize retarding performance. This collaboration of efforts resulted in a product that is fully integrated in the engine, factory installed as standard equipment and has common components for all engine models.

Our Story

Although the Jacobs Engine Brake has been on the market since 1961, the need for it was terrifyingly demonstrated to its inventor Clessie L. Cummins, some thirty years earlier. In August of 1931, himself, Ford Moyer, and Dave Evans driving a Cummins diesel powered Indiana truck from New York to Los Angeles...

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Featured Technology


ADT (Active Decompression Technology)

For Start-Up and Shutdown Engine Strategies When drivers expressed frustration with anti-idling regulations, Jacobs’ engineers developed a device to improve start-up and shutdown engine technology.

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