Jacobs Exhaust Brake® provides additional vehicle braking power by restricting the flow of exhaust gases and increasing backpressure to the engine. The exhaust brake can be used alone or in conjunction with other Jacobs® braking technologies.
Performance benefits: Jacobs Exhaust Brake
Ideal for light- and medium-performance applications
where retarding is needed, but packaging and costs are significant drivers
Combine with a Jacobs bleeder brake
or compression release engine brake for enhanced performance in medium- and heavy-duty applications
Jacobs Engine Brakes® and Exhaust Brakes have provided drivers with increased braking performance for decades and the technologies continue to evolve. Today, these technologies even help to reduce emissions. This was first accomplished with variable valve actuation, then with cylinder deactivation, and now with exhaust throttling to help meet emissions regulations. Jacobs has adapted its long-standing, robust exhaust brake technology for thermal management use for modern commercial vehicle engines, while still retaining its well-known capability as a retarding device.
The Jacobs® exhaust throttle works by actuating a flap downstream of the turbo to increase exhaust backpressure and reduce mass flow through the engine. Used alone, the exhaust brake provides light retarding when exposed to the increased backpressure by increasing the work of the piston during the exhaust stroke.
Technologies reducing emissions
Thermal management device
that effectively increases the workload on the engine and reduces mass flow through the exhaust to increase the enthalpy applied to the catalyst
Use as a fast warm-up or keep-it-warm device
to significantly reduce the engine's nitrogen oxide (NOx) output
Def-resistant systems
available for dual dosing applications where the diesel exhaust fluid (DEF) has not fully decomposed before it comes into contact with the throttle
The Jacobs Exhaust Brake® works well for thermal management by increasing the enthalpy applied to the aftertreatment catalyst(s). Next-generation aftertreatment systems can include a dual dosing strategy with a diesel exhaust fluid (DEF) injector located as close to the turbo as possible. This makes it difficult to use an exhaust brake because the DEF will not be fully decomposed by the time it contacts the throttle. Our innovative DEF corrosion-resistant exhaust throttle can be used in these systems without function degradation.
