Miller timing vs F timing

[redlinej]

Hi guys,
Can any one explain the different between miller timing and f-timing.

 

[BigClive]

What's "f-timing"?

 

[140Airpower]

I think I know what Miller time is.

 

[Lou Scannon]

Miller Time = Feier Abend!

"Schiefgehen will, was schiefgehen kann" - das Murphygesetz

 

[redlinej]

INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS That's the motto of this forum.
With the said i deal the electrical side of diesel generator and someone said that this generator don't have miller timing, it have f-timing,because i never heard of the timing i decide to asking and do my own research but it came up negative.

 

[MikeHalloran]

Let your own research in future include Google, which produced some interesting hits on "timing a Diesel miller" without the quotes.

Let your own first questions here in future include a context, e.g. Diesel engines,
and some indication of what you have done to help yourself,
and core results from your research.


... else you will be mocked.

... for which I will not apologize.

The back and forth joking does occasionally break loose enough detritus to fill in the holes in the original question, and allow generation of an answer. ... which is very occasionally correct.

Mike Halloran
Pembroke Pines, FL, USA

 

[catserveng]

Here is a link with an excellent paper regarding applying a miller cycle to a diesel engine,

http://www.diva-portal.org/smash/get/diva2:542254/FULLTEXT01.pdf

Here is another paper describing comparison between Miller, Otto and Diesel cycle engines.

https://repositorium.sdum.uminho.pt/bitstream/1822/9903/1/SAE2007-01-0261(cycle comparison).pdf

I have no idea what you mean by "f-timing".

Perhaps some more detail like what engine make and model you're referring too, as a number on manufacturers are starting to offer 4 stroke miller cycle gas and diesel engines as emissions regulations become more strict.

Mike L.

 

[BigClive]

Redline - certainly no mock intended on my part. I take quite an interest in novel engine cycles and strategies and I have never heard of "f-timing" - neither has the internet from what I could see.

 

[jgattoni]

More details on what F-Timing is......This post lacks necessary info if you want an "Intelligent.....Professional" discussion.

 

[Pancholin]

I would ass-u-me that since Miller timing uses variable valve timing that f-timing would be Fixed timing.

 

[BrianPetersen]

That is a not-entirely-unreasonable guess ... except that it is not strictly necessary to use variable valve timing in order to implement Miller/Atkinson!

Most production implementations do use VVT in order to minimize the bad side-effects of Miller/Atkinson, e.g. the VVT is used to reduce the Miller/Atkinson effect near full load so that the engine will actually have a decent torque output, instead of a hamstrung torque output, and increase the effect at part load when the driver is not asking for the torque anyways.