Breakthrough New Technology for Piston Rings

Status
Not open for further replies.
Joined
Aug 30, 2004
Messages
35,281
Location
CA
Dear GM 3.6L DI V6 and VW 2.0T DI Engineering Teams,

You need these.

Quote:
Federal-Mogul Corp. today announced the availability of its two-piece patented LKZ oil ring design for direct-injection gasoline engines that the company says improves fuel economy, reduces carbon tailpipe emissions and increases the amount of time between oil changes.

The company says the oil ring - also known as piston ring, which is an open-ended ring that fits into a groove on the outer diameter of a piston in an internal combustion engine or steam engine - reduces oil consumption by up to 50 percent and friction by up to 15 percent, compared to the best conventional two-piece oil rings.

This innovation and ones like it that improve the fuel efficiency of internal combustion engines are a big deal when you consider the fact that despite all the recent talk about electric-drive vehicles, the vast majority of vehicles 10 years from now are likely to be powered by conventional petrol-powered engines.

Federal-Mogul Senior Vice President Rainer Jueckstock said in a statement today that there are "very few technologies that provide such an easily implemented improvement in fuel economy and emissions reduction as LKZ rings."

Typical piston rings apply equal pressure to the cylinder bore on the downstroke, toward the crankcase, and on the upstroke, toward the combustion chamber. The LKZ ring combines a stepped surface and taper on its contacting edge, which provides a well-defined pressure to the cylinder wall on the down-stroke and a significantly lesser effect on the upstroke, the company said.

The down-stroke pressure more effectively returns the oil that lubricates the cylinder to the oil pan, as opposed to allowing oil to enter the combustion chamber, where it may create carbon on the spark plug or on the cylinder head and increase oil consumption.

The LKZ ring is so effective in pulling oil away from the combustion chamber and in reducing oil consumption that the company claims it was able to improve ring tension and reduce friction.

"Reduced ring friction requires less energy, which means better fuel economy and less CO2 emissions," said Johannes Esser, Federal-Mogul's director of engineering, rings and liners.

He said the LKZ ring, unlike conventional oil rings, also provides consistent low oil consumption over the life of the engine by reducing carbon build-up on critical parts of the piston, such as just above the compression ring.

Carbon build-up on the piston can lead to cylinder liner damage and increased oil consumption.


http://blogs.edmunds.com/greencaradvisor...nd-oil-use.html
 
Hard to believe piston rings have been around 100 years and they are still perfecting them. Why the reference to direct injection engines as the application? Is it because they were trying to solve the carbon build up problems with DI and stumbled on a way to reduce friction and reduce oil consumption too? And why would this increase the OCI? Less blow-by?
 
Seems to me the DI engine is far from perfect, has known problems, and they are trying to resolve them. I'm glad I don't own a DI engine.
 
And how much will they want for these new, shiny toys? Plus, will they be OEM-only, or available for retrofit onto existing cars? Some Saturn owners would love a set of these.
 
I don't use any oil and I have over 200K miles (330K KM's) on my engine.
21.gif


Maybe Hyundai is already using this?
 
Originally Posted By: Cutehumor
the wear numbers on the GM 3.6L DI V6 have been crazy stupid


What do you mean by 'wear numbers'? Are you talking about results of used oil analysis?
 
Those are extraordinary claims if they are talking about the best available rings for any engine.

They are pretty ordinary claims if they are talking about a specific engine with ring issues. It's pretty easy to cut oil consumption in half when the engine is gulping oil. The trick is doing it without increasing the spring tension so much that the result is increased wear and friction.
 
Less contact area (thinner rings) with the cylinder means faster wear though. Look at the diagrams.
 
Interesting. LKZ sounds like a new Lincoln model.
lol.gif
But seriously, the ring looks good and it appears to soundly offer the intended benefits. My question is what about the fuel dilution? This ring could further reduce the cylinder wall wiping on the upstroke, as it's physically optimized for downstroke wiping of oil, allowing fuel that is adhered to the cylinder wall to pass down more easily. It will certainly reduce oil passage into the combustion chamber, but I'm not sure that was the problem with DI.
21.gif
 
Originally Posted By: StevieC
I don't use any oil and I have over 200K miles (330K KM's) on my engine.
21.gif


Maybe Hyundai is already using this?


With all of the Amsoil, Red Line, and RLI runs you've done I doubt you have this problem:

Quote:
He said the LKZ ring, unlike conventional oil rings, also provides consistent low oil consumption over the life of the engine by reducing carbon build-up on critical parts of the piston, such as just above the compression ring.

Carbon build-up on the piston can lead to cylinder liner damage and increased oil consumption.
 
It would seem that the thinner contact area would wear faster.

Today's engines don't use oil like in the past.
For one, they are smaller!
Two, they are built better - tighter.
Once oil control is achieved, more is not better. We want lubrication for the bores and rings.
Some V8 performance engine builders intentionally shoot for a qt. of use every 2,000 miles or so, to ensure good lubrication. [even though they could easily get less oil use with different rings]

Anyway, I'm not sure this would help the 'DUI' engines.
They have other problems.
 
nice idea. But only an incremental improvement.

Hardly revolutionary.

And no one explained how this helps DUI (thanks Mechtech!) engines with their intake deposit issues.
 
Originally Posted By: SteveSRT8
nice idea. But only an incremental improvement.

Hardly revolutionary.

And no one explained how this helps DUI (thanks Mechtech!) engines with their intake deposit issues.


Less blow-by and oil loss will reduce deposit formation on the intake valves.
 
Originally Posted By: The Critic
Originally Posted By: SteveSRT8
nice idea. But only an incremental improvement.

Hardly revolutionary.

And no one explained how this helps DUI (thanks Mechtech!) engines with their intake deposit issues.


Less blow-by and oil loss will reduce deposit formation on the intake valves.

Sign me up please!! :D
 
Status
Not open for further replies.
Back
Top Bottom