Terminology for Engine off vs Engine on hypermiling techniques

[04_Sentra]

Is there a good way to differentiate between Engine off and Engine on hypermiling techniques?

As I understand it EOC and P&G are typically engine off but don't need to be. I've seen some people use EO(n)C and EO(ff)C which is clearer but a little awkward. Haven't seen anything similar for P&G.

Just trying to get a better idea of what techniques people are using so I know what works and what works better.

[SentraSE-R]

Talk to six hypermilers, and you may hear half a dozen different descriptions of what they do. One will glide, another will coast. A third will say he does it NICE-on, the fourth does EOC.

My '02 SE-R didn't like the engine off, so I rarely shut it off. If I did, it would run in open loop for 4 miles, negating all the gains I made from shutting it off. It also hated to go into DFCO. I had to be over 2500 rpm to get DFCO, 65 mph or faster in 6th gear. It was a difficult car to hypermile.

My '06 xB can coast engine off for miles, and still be in closed loop when I restart it. It loves DFCO, entering it when the engine is >1500 rpm, about 35 mph or faster in 5th gear. It's a breeze to hypermile it.

[skyl4rk]

PNG means pulse and glide with engine on
EOC means engine off coasting, usually with a bump start at the end of a coast.

[bestclimb]

my understandin/vote is for.
EOC engine off coast
neutral coast is engine on

P&G pulse and engine off glide.
PNG pulse and neutral glide (engine on).

[Arragonis]

Apologies I probably started this (O)n vs (O)ff terminology mainly because I wasn't clear on the terms used - I think the explanations above probably clear it up.

I wanted to be clear on what I meant in my posts because I was looking at the effects of shutting off an engine with a turbo suddenly vs an engine which does not have one.

[skyl4rk]

PNG == P&G

and both are with the engine on

amirite?

[Piwoslaw]

Originally Posted by Arragonis

Apologies I probably started this (O)n vs (O)ff terminology mainly because I wasn't clear on the terms used - I think the explanations above probably clear it up.

Yes, you did, and I plan to use that terminology until I come across (and hardwire it into my brain) something better. By "better" I mean not only distinguishing between engine on and off, but also written in such a way that new members will not get it confused. For example, only recently did I find out that P&G implies engine offing, and not general "accelerate&coast regardless of the state of the engine".

[dcb]

Originally Posted by skyl4rk

PNG == P&G

and both are with the engine on

amirite?

no, p&g is engine off according to the glossary
Glossary Take II

and I think you just made up PNG

[Arragonis]

I have created a monster, a monster....

I think unless someone specifically says Engine Off then assume they are on. Of course feel free to ask, everyone is nice here.

[endurance]

Ok, tangent time. What's open loop vs closed loop and how would I know the difference while driving?