Oil Contaminant Separator (OCS) Orientation: The Official Word

[pyoungbl]

Originally Posted by SpudRider

I am wondering if your previous EFI motorcycles employed an OCS, or if they vented directly to the air box without an OCS?

The '07 Norge had a drain just like what we have but I recall that it came directly from the airbox. Guzzi engines would pump oil up to the airbox if the crankcase was over filled. Most of the newer Guzzi engines want to be filled no more than 1/2 way between low and full, any more than 1/2 way and they will pump oil to the airbox until the engine reaches its 'happy state'. The Stelvio and V7 do not have a separator that I'm aware of and I do not recall ever seeing one on any Ducati I owned (4 of them), the G650GS, or the Triumph Tiger. All vented direct from crankcase to airbox. None of those bikes ever had more than 0.5 % fuel in the oil. The Ducks did tend to build up water in the oil (air and water cooled bikes but over cooled) and this mayo would disappear after a good hot run. The separator we have does not seem to be a problem, just drain it as needed, so I do not intend to 'fix' it. I did not see anything after my last trip. Although I rode through 3 different rainstorms the bike was always showing at least 3 and sometimes 4 bars, particularly on some of the long mountain pulls. I was surprised that the fan never came on.

[katflap]

Originally Posted by 2LZ

Almost all of the early EFI's fired a load of fuel every stroke, whether the intake valve was open or not. That "blank" spray of fuel would sit on the back of the intake valve and vaporize/atomize while it waited. This process also increased the intake valve build-up due to the olefins and diolefins in the fuel. Ford (in American cars) brought out the first "SEFI" system that only fired when the intake valve opened.
I've heard that many EFI's today still work firing a charge every stroke. I wonder if the EFI on the RX3 fires in this fashion, with the injector firing every stroke? This may possibly increase the fuel in the oil (or drain tube). Does anyone know the actual injector firing sequence?
Just a thought......

Yes our EFI can detect the inlet stroke

(taken from PCHUD sensor description)

MAPCID ENABLED- ( MANIFOLD ABSOLUTE PRESSURE (sensor), CYLINDER INLET DETECTION) - cylinder detection negates the need for a camshaft position sensor
When engine cylinder is working in intake stroke, the intake valve suddenly
opens, and the manifold pressure near the intake valve drops sharply
(by about 1kPa). The sharp drop of pressure is detected by the MAP sensor,
the ECU processes this signal by means of
the software, to determine stroke. Enabling spark ignition and fuel injection to be on the correct stroke

[2LZ]

Originally Posted by katflap

Yes our EFI can detect the inlet stroke

(taken from PCHUD sensor description)

MAPCID ENABLED- ( MANIFOLD ABSOLUTE PRESSURE (sensor), CYLINDER INLET DETECTION) - cylinder detection negates the need for a camshaft position sensor
When engine cylinder is working in intake stroke, the intake valve suddenly
opens, and the manifold pressure near the intake valve drops sharply
(by about 1kPa). The sharp drop of pressure is detected by the MAP sensor,
the ECU processes this signal by means of
the software, to determine stroke. Enabling spark ignition and fuel injection to be on the correct stroke

Excellent! Great work, katflap and good to know! :-)

[BlackBike]

OK there will be a quiz for rx3 owners

[katflap]

Originally Posted by detours

Oil and contaminants are actually at less risk of entering the airbox in the 'upside down' orientation.

Remember, the OCS filter is shaped like a cup.



In the 'upside down' orientation, vapors must pass through 2 filter walls (the side and the floor of the filter) before reaching the air intake. Heavy contaminants like oil and particulates will be filtered out by one or the other filter wall, dissolved in condensate fuel and dropped into the catchtube.



In the opposite 'official' orientation, vapor will only pass through one filter wall and up the open part of the cup. This is another reason why I like the 'upside down' orientation.

For some reason my OCS differs from yours

My original OCS chemically melted, this one is a replacement from China, so perhaps this is why.

( your bikes in the USA are updated and don't suffer from a melting OCS)

So for me, changing the orientation means that one way passes through the filter, the other way does not.

[Inroads]

In anticipation of an increase in contaminants in my drain tube by
Flipping it to the official position I have taken a Lawnmower fuel shut-off
Valve sleeved to the size of the drain tube and removed the plug.
Now I can just open the valve at my stops and drain it.

[Ron B]

Originally Posted by Inroads

In anticipation of an increase in contaminants in my drain tube by
Flipping it to the official position I have taken a Lawnmower fuel shut-off
Valve sleeved to the size of the drain tube and removed the plug.
Now I can just open the valve at my stops and drain it.

that was one of the first things I did.

[Ron B]

CSC blog about fuel in oil http://californiascooterco.com/blog/

[2LZ]

To think all this fuss about a hose on all my bikes I've never paid attention to, because it always just dumped under the bike. On many old HD's, they had two vents. One that dumped and one that you could open on occasion and let it spray your chain.

Best "catch can" I ever saw was an old biker I knew on a Panhead chopper. He had a 50 ml (airplane bottle) Jack Daniels bottle mounted that caught his ventings. We'd pull up to a bar, he'd unscrew it and dump it in a flower pot. He didn't want anyone slipping on his drizzle.

[BlackBike]

Originally Posted by 2LZ

To think all this fuss about a hose on all my bikes I've never paid attention to, because it always just dumped under the bike. On many old HD's, they had two vents. One that dumped and one that you could open on occasion and let it spray your chain.

Best "catch can" I ever saw was an old biker I knew on a Panhead chopper. He had a 50 ml (airplane bottle) Jack Daniels bottle mounted that caught his ventings. We'd pull up to a bar, he'd unscrew it and dump it in a flower pot. He didn't want anyone slipping on his drizzle.

2lz, my bike has the little hose off the air box that is perched right on top of the chain
See screwdriver head touching hose from air box PIC OF BASHAN BLAZE BELOW

[rjmorel]

Joe posted that Rider magazine just did a ride report on the 2016 RX3 and it clearly shows a pic with the OCS half full of liquid. Report mentioned that it had grease zerks on the swing arm ? that would be good. rj

http://ridermagazine.com/2016/05/18/...d-test-review/

[SpudRider]

Originally Posted by rjmorel

Joe posted that Rider magazine just did a ride report on the 2016 RX3 and it clearly shows a pic with the OCS half full of liquid. Report mentioned that it had grease zerks on the swing arm ? that would be good. rj

http://ridermagazine.com/2016/05/18/...d-test-review/

Thanks for alerting us to the nice review by Rider Magazine.

I have added a link to this review in the RX3 Tech Sticky, under the Ride Reviews subheading.

http://www.chinariders.net/showthread.php?t=14228