Engine Brake

What's the point? Modern vehicle brakes are fine. You are adding expense and complexity for no reason.

Google "Jake brake"....

Old concept. Been in use for decades in heavy duty trucks/lorries.

If you are looking to replace the conventional disc/drum brake system with this concept, there is a potential for major liability when a failure occurs.

Conventional braking systems are well proven and reliable technologies. Anything out of the norm of standard practice will have the lawyers circling.

Compression braking is outlawed or restricted in some locales due to damage (from heavy vehicle such as log haulers ... such as in Washington state, USA) that such braking causes to roads.

Then there's the noise, which in some localities could be frowned upon.

... a case of "Why re-invent the wheel?"

How does compression braking damage a road?

The Brake and Road is direct relation with road and road must be effected. But it ia applicable to all Brakes not for particular this Brake. And what ever I immage this Brake is without noise. This is additional Brake and useful to serially braking speed, which not good where traffic.