DWeikert wrote:
No worries. My wording may have been a little blunt in the original question, and for that I apologize. Exhaust brakes can also regulate the amount of back pressure which has the effect of adjusting the amount of braking. I wonder if what you're feeling is the change from partial braking to full.
As I said, my Duramax uses the turbo vanes to simulate a separate exhaust brake. I know what I've felt in that going down grade is initially I have just engine braking holding me back, which is only enough to slow me down on shallow grades. If I just tap the brakes the exhaust braking then kicks in. And there, I'll agree, it has the feeling of an aircraft applying reverse thrust, but it's really just the switch over from the weak engine brake to much stronger exhaust brake.
At least, that's what I think is going on...
Just a case of semantics. I chose the visceral approach. You chose technical. IMO, both are equally important.
