| [ Total Views: 2981 | Total Replies: 14 | Thread Id: 82288 ] |
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 matara
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| posted on March 2nd, 2010 at 05:57 AM |
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New Horizontally opposed Ecomotor 100mpg
Just stumbled across this on the net, but you can see the developers work on the beetle engine in this design. Over 100mpg and twice the power of a
conventional engine from a two stroke engine! Even has an electric version of a turbo/supercharger.
[img]http://image.automobilemag.com/f/31686174+w750+st0/0912_01_z+ecoMotors_OPOC+eM100_testing.jpg[/img]
[img]http://image.automobilemag.com/f/31686171+w750+st0/0912_02_z+ecoMotors_OPOC+eM100_testing.jpg[/img]
Here is the link
http://www.ecomotors.com/
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pete wood
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| posted on March 3rd, 2010 at 09:25 AM |
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those secondary connecting rods would be doing it tough. what's the rev range on that?
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bajachris88
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| posted on March 3rd, 2010 at 01:04 PM |
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Pretty innovative and ingenious. and they are right on teh money with the fuel efficiency and power.
But they claim it to be a green engine, however don't highlight how the design overcomes the environmental concerns that are typical of a 2 stroke
(oil/pollution/emissions)
Unless the whole green label is ignorant towards that and refers to the fuel consumption. I'm sure they would have looked into that though
(emissions).
Does anyone have any more info about that?
(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears. 
New engine in process: 94mm p&bs, 74mm C/w chomol Crank, 35.5x39 SP heads, turbo. Wierd combo, hopeful torque monsta! |
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gerrelt
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| posted on March 6th, 2010 at 05:22 AM |
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Cool engine!
Allthough It will be pretty wide, I think.
It's roughly the same idea as this opposed piston two stroke diesel engine:
More here: Achates
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jamiec
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| posted on March 10th, 2010 at 02:52 PM |
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bajachris88 most two stroke engines other then small ones like lawnmowers wiper snippers etc have a wet sump just like 4 stroke engines so they don't
inject oil with the air fuel mix so no oil burning. i guess this engine would be the same.
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Snap Crackle Bang
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| posted on March 10th, 2010 at 09:58 PM |
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This looks like a variation on the "Commer Knocker" arrangement. The Commer was a British made truck with a 2 stroke diesel engine that had 6
pistons, but 3 cylinders. (Might be able to get cheaper rego because there are only 3 cylinders!) The advantage is that the inlet is at the opposite
end to the exhaust, so very little fresh charge escapes through the exhaust ports.The Commer engine had connecting rods that connected to levers that
connected to the crankshaft. Not built for revs! There was a German truck engine which had a similar arrangement but with twin cranks connected by
gears. Elegant but expensive.
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waveman1500
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| posted on May 21st, 2010 at 01:01 PM |
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| Quote: | Originally
posted by Snap Crackle Bang
This looks like a variation on the "Commer Knocker" arrangement. The Commer was a British made truck with a 2 stroke diesel engine that had 6
pistons, but 3 cylinders. (Might be able to get cheaper rego because there are only 3 cylinders!)
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Amazingly, from what I have read about it I believe that the reduction in RAC horsepower rating and hence road tax was in fact the main reason for
developing the engine!
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rocknrob
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| posted on May 21st, 2010 at 04:42 PM |
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| Quote: | Originally
posted by waveman1500
| Quote: | Originally
posted by Snap Crackle Bang
This looks like a variation on the "Commer Knocker" arrangement. The Commer was a British made truck with a 2 stroke diesel engine that had 6
pistons, but 3 cylinders.
My Dad used to haul coal in central QLD in the late 50's and the "commer double knockers" were famous because when they blew shrapnel went
everywhere...of course these trucks were massively overloaded and overworked
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pete wood
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| posted on May 29th, 2010 at 10:21 AM |
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a whole lot of parts for not a whole lot more power really. the sarich [orbital] 2 stroke is a much more efficient design parts wise. Remember, less
moving parts is the key. That's why rotaries work so well. The SIDI holden motors are an offshoot of that stuff too. Direct injection petrol motors.
The difference with the orbital design was that it used a supercharger to create inlet pressure. Zoom magazine did a write up on a bmw 3 series
powered by one of the testbench orbital 6s and it was apparently very impressive. It wouldn't be hard to turn a VW 4 into a dry 2stroke. I've
thought about it often enough. Half the parts are available from motorbikes. Then just make up some generic heads and throw on a supercharger. Once
the SIDI technology takes off in other cars, fuel pumps and the like will be easy to come by and you could build a really hot flat four that's
smaller and a lot revier.
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1303Steve
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| posted on May 30th, 2010 at 10:10 AM |
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Hi
I went to demonstration of new sort of motor in Sydneys west a few years ago, it was based on a Subaru flat 4, I think it was called Revertec or
something similar. The people made all sorts of claims about power and effeiceincy, it looked similar to one Matara posted.
The motor used Haltec injection, coincidently Haltec now occupy the same building that Revertec were in .
Steve
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pete wood
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| posted on June 8th, 2010 at 10:04 AM |
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I think the revertec had a scotch yoke setup with the pistons joined together.
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General_Failure
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| posted on June 16th, 2010 at 01:26 PM |
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| Quote: | Originally
posted by pete wood
I think the revertec had a scotch yoke setup with the pistons joined together.
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The revertec was a Bourke Cycle engine?
If at first you don't succeed. Build, build again.
Vehicle: 1975 Special order delivery walkthrough panel based LCA pop-top camper. Motor: Nippon 1.8L Single port Wasserboxer, Transmission: 3 rib 002.
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pete wood
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| posted on June 18th, 2010 at 08:01 AM |
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if by that you mean that the opposing pistons move in the same direction at the same time then the answer is yes. Because the scotch
yoke joins them together, as one goes out the other side must come in and vice versa. VW/Subaru boxers have a crank config that means the opposing
pistons go opposite directions at the same time. Both out, then both in.
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General_Failure
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| posted on June 19th, 2010 at 08:38 AM |
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| Quote: | Originally
posted by pete wood
if by that you mean that the opposing pistons move in the same direction at the same time then the answer is yes. Because the scotch
yoke joins them together, as one goes out the other side must come in and vice versa. VW/Subaru boxers have a crank config that means the opposing
pistons go opposite directions at the same time. Both out, then both in.
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Partially yes. Unless I misread was it being said that the revertec motor used a Scotch Yoke and 2 stroke, non oil butning technology?
Anyway, for those of you who couldn't be bothered:
http://en.wikipedia.org/wiki/Bourke_engine
I should mention in spite of what that wiki says, there are Bourke motors out in the wild. Some are still functioning too. i think they were used on
generators, big saw, that kind of thing. I have always wanted to put one of those wonderful, strange motors in my bay. However with the machining
technology I possess I can't even drill a hole straight let alone fabricate a motor.
If at first you don't succeed. Build, build again.
Vehicle: 1975 Special order delivery walkthrough panel based LCA pop-top camper. Motor: Nippon 1.8L Single port Wasserboxer, Transmission: 3 rib 002.
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HappyDaze
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| posted on June 19th, 2010 at 09:47 AM |
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The Commer 'Knocker' earned its nickname from the dreadful knocking noise that the engine produced, especially when worn. You could hear them
'knocking' long before the exhaust was heard.
I'd rather wear a Beetle out by racing it than by polishing it!
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