If all ducks waddle and Donald waddles, does that immediately making him a duck? What if Donald's pants have an uneven stitch which makes him walk in an even gait causing him to waddle? Does that mean his pants made him into a duck or just to appear like he is?

Quack!

BenT
sent from my electronic duck & cover

On Sep 14, 2013, at 12:42 PM, Dave Mcneely <mcneely4@COX.NET> wrote:

> http://en.wikipedia.org/wiki/Compression_release_engine_brake
> 
> If Wikipedia is an acceptable source, then this sounds authoritative to me.  So, seems that a diesel engine has little or no engine braking capacity in its raw form, because it gives it up as the pistons move to compress the air previously entrained, creating a spring effect.  The engine does brake the vehicle, but then it accelerates it, obviating the braking effect.
> 
> What jake brakes (more generically termed engine brakes or compression brakes) do is release the air before compression, preventing the accelerator effect, thus conserving the engine braking.
> 
> So, diesel trucks do indeed have engine braking.
> 
> mcneely
>