What is an Allison transmission retarder?

What is an Allison transmission retarder?

Allison’s hydraulic retarder is basically a vaned flywheel in the transmission housing. The transmission directs oil into the retarder housing to absorb the vehicle’s energy through the drive shaft. The absorbed energy is converted to heat and dissipated through the vehicle’s cooling system.

What is a truck transmission retarder?

A retarder is a device used to augment or replace some of the functions of primary friction-based braking systems, usually on heavy vehicles. Retarders serve to slow vehicles, or maintain a steady speed while traveling down a hill, and help prevent the vehicle from “running away” by accelerating down the hill.

How does a retarder work?

An engine retarder captures the exhaust from the engine and compresses it so that the engine must work harder to push the gas out of the cylinders, and it therefore retards and slows the engine through resistance.

What does transmission retarder do?

Retarders relieve the service brake and increase the active safety and cost-effectiveness of commercial vehicles. Retarders are installed in a commercial vehicle’s drive train. They convert some of the vehicle’s kinetic energy into heat.

How does a Volvo retarder work?

The retarder consists primarily of two impellers; a fixed one (stator) and a rotating one (rotor) which counteract each other with the help of oil. Due to the fact that the blades on the stator and rotor are angled towards each other, the flow of oil between them is counteracted.

What is the difference between retarder and engine brake?

A retarder is a hydraulic or electromagnetic device fitted to the output of the transmission or on the driveshaft itself. An exhaust brake is a device that opens the exhaust valves at the end of the compression stroke so the engine cannot gain back the energy it used to compress the air into the cylinders.

What’s the difference between a retarder and a Jake brake?

Although they are both brake retarder systems, Jake Brakes and Exhaust Brakes are essentially opposites in how they function. As you now know, a Jake Brake releases the compressed air that gets trapped in the cylinders. Despite the excessive noise, Jake Brakes are very powerful and can be an incredibly useful tool.

Are Jake brakes illegal?

Jake braking is illegal in some areas due to the noise disturbance it produces; often resembling the sound of gunshots and in some areas could potentially cause environmental repercussions.

What is a CDL retarder?

CDL retarders are found on some commercial vehicles and are designed to help slow a vehicle and reduce the need to use your brakes. When used properly, the retarders reduce your brake wear and provide you with another option for slowing down.