Wow - "FIRE UP" - YIKES! - Lengthy dissertation is right!..:B
So, here's a "cut to the chase approach", a "Reader's Digest Condensed Version" (LOL)....from the horse's mouth so to speak...;).. -
Links will allow the reader to get as technical as he/she desires.
(From) Jacobs Vehicle Systems:
"How a Compression Release WorksWhen activated, the Jacobs Engine Brake opens the exhaust valves near the top of the compression stroke, releasing the highly compressed air through the exhaust system. Little energy is returned to the piston, and as the cycle repeats, the energy of the trucks forward motion is dissipated, causing the truck to slow down."
Link to Jacobs Compression Release BrakesScroll through "Featured Solutions" - for various engine apps.
Link to the various Jacobs systems - including exhaust brakes.
Nice write up on "How Jake Brakes Work" -
including the history behind 'em - and......
Interesting to note, the Jacobs Company's position on
"NO JAKE BRAKE" - signs!
Lastly, Google.... "Engine braking system for (engine/vehicle)"..;)
.