Using jakes on long downhills

On the new Freightliners with auto and 505 hp engine, stage 1 & 2 are generally mild engine retarding, but you move it to stage 3, hold on to your socks. It gets REAL aggressive with downshifting to get and keep into higher RPMs generally not available on a downshift to those with a stick (above 2,100)

 

Valid point. However, there are certainly safe places to pull over and some that aren't, and they are not always evident by appearance. It seems an override, or even better a pre-emission truck or glider would be prudent.

 

It's kind of why airplane engines are stuck in the 60s.

 

If a newer heavy haul DPF truck (with a heavy load) needs to do a parked regen, something is wrong and the truck's DPF system probably hasn't been properly maintained.

Could excessive engine braking cause a requirement for manual regen? Perhaps but I doubt it.

 

Everything was explained in my original post.
If you were not driving in 2008, 2008 was the first year of the regen. There wasn't any DEF. The company was detuning their engines more than 10%. That's a bad thing to do. Very bad. It affected the regen. Especially when heavy jaking.

 

I don't have that kind of luck. If I did that, sure as God made little green apples, there'd be some local talent sitting there just waitin.

 

All engine break does is bleed off some of the piston compression

 

##### 2100... nom nom nom.

 

Why would it shorten the engine life....all a jake is, is a compression release at/near the top of the compression stroke.

OP, I know a Volvo motor I drove would disengage the jake until oil temp was up to a certain temperature, not sure why, but it would give a warning on the LCD display if you tried to use it too early after starting...I have used my jake on just about every grade in the US and never had an issue.

 

When you use Jack brake the engine will work in reverse. I'm not saying imI not using it but if you O/o it may save a lot off miles on engine, same as don't start it more than twice a day or keep it ideling for no reason