The Jacobs Engine Brake® (also known as the "Jake Brake®") is a diesel engine retarder that uses the engine to aid in slowing and controlling the vehicle. When activated, the engine brake alters the operation of the engine's exhaust valves so that the engine works as a power-absorbing air compressor. This provides a retarding, or slowing, action to the vehicle's drive wheels, enabling you to have improved vehicle control without using the service brakes*. This conservation results in reduced service brake maintenance, shorter trip times, and lower total cost of ownership.
Here are some photos of Jacobs engine brakes for your reference:
The Jacobs Engine Brake is a vehicle-slowing device, not a vehicle-stopping device. It is not a substitute for the service braking system. The vehicle's service brakes must be used to bring the vehicle to a complete stop.
Here's how it works:
Compression Release Mechanism: The Jake Brake utilizes a compression release mechanism, often referred to as a nett brake or Jake brake.
Engine Braking: When activated, the Jake Brake opens the exhaust valves at the top of the compression stroke, releasing compressed air in the cylinder.
Power Absorption: The released air acts as a power-absorbing air compressor, converting the engine's energy into braking force.
Reduced Speed: By reducing engine power, the Jake Brake helps slow down the vehicle without relying solely on the service brakes, preventing brake wear.
Air Compression and Release: The mechanism involves air compression and release to decelerate the vehicle, working in tandem with the engine.
