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Author Topic: Rotary Valve EFI 360.  (Read 348 times)

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Offline Flettner

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Rotary Valve EFI 360.
« on: May 26, 2017, 03:01:06 AM »
This is a project I started way back when the original TSM was up and running. I have far too many projects and the 360 got sort of left behind, sleeve engine took up some time then the 700 twin Autogyro engine and many different cylinder casting projects and then the HCCI test engine.
So, now that KTM have endorsed my DTPI injection by copying it, I'm all fired up to finish the 360. I've been waiting on a gearbox (YZ250),as the cases are designed to accept these gear clusters. Should have a gearbox next week. In the interim I've designed a BETTER fuel injection system ( KTM will probably copy this too I guess), the new design cylinders to accept this new injection system are to be cast, if time allows, this weekend or next. The new system uses four injectors, this will allow for smaller injectors, one in each transfer port aiming toward the incoming air flow. The back two injectors will run in the B ports as per my YZ and KTM, the front two in the A ports will only operate as the chamber 'sees' pressure in other words as the chamber starts to work. Up to approx 3.5 to 4 PSI. This chamber pressure will be sampled over a few crankshaft degrees each cycle so the ECU doesn't have to put up with and get confused by all the pules running up and down the pipe. This pressure information will overlay the fueling map so will only fire the A port injectors as the pipe requires, not necessarily the engine. Pipe and engine are two separate entities but will only work together but not always linked directly (with their fueling requirements). This I have learnt.
Some may remember this engine uses a variable rotary valve housing like my EFI 350 Kawasaki, this engine will use two sliding gibs, one for shut time and one for open time adjustment. These sliding gibs will now also act as the throttle (ECU driven) so there will be just a bell mouth outside the rotary valve housing, keeping the engine dimensions in check. This also opens the door for REAL traction control in the future. 
As soon as I can remind myself how to add pictures, I will.
I intend to lay out the progress here on TSM as the build is progressing, it is still an after hour hobby though so time dependent. 
« Last Edit: May 26, 2017, 03:05:37 AM by Flettner »

Offline citabjockey

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Re: Rotary Valve EFI 360.
« Reply #1 on: May 27, 2017, 07:33:20 PM »
Wow, two totally new concepts in this engine (chamber pressure-wave driven metering and variable rotary valve throttle). Looking forward to your updates!
Yamaha CT3, RT3, MX125, SC500, Toy Prius, Diesel F250 (it all balances out)

Offline Flettner

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Re: Rotary Valve EFI 360.
« Reply #2 on: May 28, 2017, 01:01:45 PM »
I'll get some pictures up, but have I had a battle with this forum regarding posting pictures. I'll get someone that knows what they are doing to help. (a young person)

Offline rsmith

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Re: Rotary Valve EFI 360.
« Reply #3 on: May 28, 2017, 10:46:50 PM »
I am stoked to see this and will be watching closely!

I'll send you a message with how to add pictures.

Thanks for including us in this next adventure in the design of the two stroke!

--Ron.

Offline rsmith

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Re: Rotary Valve EFI 360.
« Reply #4 on: May 29, 2017, 08:56:51 AM »
You can use the "Add Attachment" function of the forum. Back in the day storage on your hosting account was limited and expensive. That is no longer the case so I removed the limits for attachments. Just keep hitting (more attachments) as needed.

--Ron.


Offline Flettner

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Re: Rotary Valve EFI 360.
« Reply #5 on: May 29, 2017, 06:23:51 PM »
Here we are casting some cylinders in the back yard
https://youtu.be/UdSw3QbZtKE

These were some cylinders we cast a few years ago, this engine is for use in Autogyros (aviation), 700cc twin with internal gear reduction. Electric start and counter balance shaft.

https://youtu.be/2nuI_QG8Ff0

This is the actual 360 crank case being cast and machined, CC601 heat treated to T6.
« Last Edit: May 29, 2017, 06:35:48 PM by Flettner »

Offline rsmith

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Re: Rotary Valve EFI 360.
« Reply #6 on: May 29, 2017, 10:17:28 PM »
That was cool!

--Ron.

Offline Coop

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Re: Rotary Valve EFI 360.
« Reply #7 on: May 30, 2017, 01:36:03 PM »
Very cool.
Nobody on their deathbed has ever said "I wish I had spent more time at the office".

Offline Flettner

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Re: Rotary Valve EFI 360.
« Reply #8 on: June 04, 2017, 03:23:36 PM »
The modified pattern

Offline Flettner

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Re: Rotary Valve EFI 360.
« Reply #9 on: September 08, 2017, 01:22:01 AM »
Ordered a set of YZ X clusters this week, if nothing else the Kawasaki 350 has taught me that a close ratio is a waste of time with this type of engine. so as soon a these turn up I can re assemble the engine and it can go back in the frame for good.
Probably look at ordering the Link ECU (extreme) next week.
Considering running a mechanical fuel pump as my charging system is not large and fuel pumps do use a bit of energy. Would need to charge the fuel system before the engine was started though. I want to keep the electrical requirement to a minimum.
« Last Edit: September 08, 2017, 01:48:52 AM by Flettner »

Offline eprovenzano

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Re: Rotary Valve EFI 360.
« Reply #10 on: September 13, 2017, 05:54:46 AM »
ABSOLUTELY FASCINATING...  Love what you are able to do...  I even enjoy your explanations...  even a simple minded person like ma can understand the basic concept what what your doing...  8)
Eric Provenzano
2001 KTM 380 EXC (mine)
2000 KTM 300 EXC (Son's)
1991 KDX 200... fun play bike
sold 1999 KX250
sold 1999 YZ125 (son's)
Sold 2001 Yamaha TTL 125 (son's 1st bike)
Sold but never forgotten 1974 Honda Elsinore CR250M
Sold 1974 Honda Elsinore CR125