Jacobs Develops High-Power-Density Engine Brake

April 2011, - Feature

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Jacobs Vehicle Systems, a supplier of heavy-duty diesel engine retarding systems, has developed new engine braking technology.
The High Power Density Engine Brake delivers 50 more power than traditional Compression Release Braking products, according to the company.

HPD engine brakes provide large displacement retarding power in small and medium displacement engines. Traditional engine brake technology provides up to 100 percent of the engine's rated power. The new Jacobs' HPD Engine Brake can provide up to 150 percent power, while also reducing loads on the valve train.

Originally designed for smaller displacement engines used in heavy duty applications, HPD can also maximize the performance of large displacement engines for applications requiring additional retarding performance.

The braking system, which will be launched globally at the Engine Expo in Stuttgart, Germany, on May 17, consists of two dedicated braking rocker arms and two collapsible bridges per cylinder. This configuration enables a second braking event to occur during each engine cycle by deactivating the main intake and exhaust events via the collapsible bridges and actuating the two braking rockers to provide optimal braking.

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