New patents for Mazda rotary released!
 

I regulary check for new mazda patents related with rotary engines. There are few new just if someone is interested...

New lubrication system (P.No.JP2010174740A):
https://img23.imageshack.us/img23/1784/lubr.th.png

Direct injection with oversize hole for using compressed air from compresion chamber (P.No.JP2010156292):
https://img526.imageshack.us/img526/9214/inj.th.png

New trailing plug with plasma jet ignition (P.No.JP2010156291A):

Dual injectors for direct injection (P.No.JP2010156289):
https://img830.imageshack.us/img830/7505/inj2.th.png

Best regards,

Mike

Mazda is getting sweeter and sweeter everyday! :D

What is interesting is the new OMP. It looks like there are several pumps to lubricate different amounts to the center of the housing and the edges of the housings where flaking occurs. This should help w/ lubricating the apex seals and the wear they see.

People are always saying the rotary is dead yet Mazda keeps filing new patents and keeps working on it. I love it!

Really cool stuff, Thanks!

Mazda can engineer durability into any rotary engine. The thing that can kill it is fuel economy. With direct injection, they can probably push that back a few decades.

it took them 7 years to put the new lubrication system on the S2, god knows when the direction injection system gonna happen

I'm having trouble finding these patents. Are you sure these are the right numbers? I'm on google and appft.uspto.gov but nothing is coming up with those numbers

the new pez injectors may help some?
OD

Cool, good to know they're still looking to improve the rotary engine.

Very nice find.

+1 they all look like good steps forward as well.

Every step forward is just us getting closer to the next rotary!!!
/steal smiley
http://yahoofreak.com/emoticons/Mood.../hilarious.gif

Well, it should be interesting... But Mazda will always find a way to improve the rotary.

anyone actually find the patents to read? i cant find them on the japanese patent office site

the direct injection design is pretty interesting.

OMP is about the same as the one found on S2. or should I say S2's New E-MOP is Version 1?

anyway nice find.

I can't tell from the picture--are these piezoelectric injectors like most direct injection applications, or are they the older solenoid type?

http://img830.imageshack.us/img830/7505/inj2.png

Patent numbers:
JP2010174740A
JP2010156292A
JP2010156291A
JP2010156289A
I find them with gb.espacenet.com searching all patents from mazda (advanced search)

Insert patent number here:
http://gb.espacenet.com/search97cgi/.../en/number.hts

^ Thanks! That's a big help. Unfortunately the patents are indeed in Japanese. But we can at least look at the pictures. From the JP2010156289 patent on the dual injector design:

https://www.rx8club.com/attachment.p...1&d=1292541959

This looks like a sketch of the fuel rails and injector positioning on top of the rotor housings. Both injectors are in the rotor housing. The abstract is in English so we can see how the injection works:

It is common on direct injected engines to inject during the compression stroke under low load but not during high load. VW engines are like that. Under low load I bet the intake-side injector sprays only a small amount of fuel.

https://www.rx8club.com/attachment.p...1&d=1292542074

In this diagram we can see this is a 6 port engine like the protype displayed a few years ago, meaning it is most likely naturally aspirated. There is also what looks like an injection timing diagram (see attached) of the sort Mazda published for previous engines.

Is that a new rotor shape in the 3rd pic of your OP?

no- its a cut-away. if you slice of the "face" of the rotor to the depth of the side of the bathtub thats the shape you are left with.

So this plasma ignition patent is unusual. From some searching, apparently plasma ignition has been in research labs for a long time but I don't think it has ever been used on a production engine for a passenger car. From what I can tell, somehow the plug creates ionized gases which are sent into the air/fuel mixture to trigger ignition with a cleaner burn.

https://www.rx8club.com/attachment.p...1&d=1292544899

The upper shaded area appears to be the portion of the combustion chamber that will be burned by the plasma ignition system under low loads. NGK recently filed a patent (also in Japanese) for a plasma-jet ignition plug. http://www.sumobrain.com/patents/wip...010073609.html . You can see some drawings of it. At first glance they don't physically appear much different from regular spark plugs to me.

In addition to the altered combustion chamber dimensions, could the plasma ignition and dual direct injection design be Mazda's strategy for improving highway mileage and other low load driving efficiency?

if you go here http://www4.ipdl.inpit.go.jp/Tokujit...ipdl?N0000=115

in put an a for the "kind code" and the number formatted like this 2010-156292 you can get a bit of a translation

OD From what I have seen (just a little) the pizo injectors are long, you need lots of stacked wafers to get enough travel. These look short.

Does anyone know how this compares with the hydrogen engine? I seem to remember it was direct injection.

these, excepting the oiling- were developed on the hydrogen engine and adapted for the 16x.

some of the early plasma jet ignition work was done using hydrogen as the source for the plasma

http://www.docstoc.com/docs/45898437...Patent-4471732