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Lotus new 2 stroke engine

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The Artist
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PostPosted: 14:19 - 11 Dec 2009    Post subject: Lotus new 2 stroke engine Reply with quote
Not really bike related atm so I will put this here.

https://www.autoblog.com/2009/12/10/lotus-omnivore-engine-is-10-more-efficient-with-more-to-come

Lotus have designed a 2 stroke engine that can run on petrol or diesel, has a variable compression ratio and runs more efficiently than previous SI or CI engines.

Also a vid

https://www.youtube.com/watch?v=fIG9pWldO8U
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Alexio
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PostPosted: 14:35 - 11 Dec 2009    Post subject: Reply with quote
So, is this a 2 stroke that is lubricated in the way a 4 stroke normally is?

Quote:
Other Components

The cranktrain of the engine comprises an 86 mm stroke crankshaft, a trunk piston of 86 mm bore and a connecting rod with 195.5 mm between centres. The piston carries four piston rings: two pegged half-keystone compression rings which traverse the ports in the upper section, and a Napier scraper ring and U-Flex oil control ring in separate grooves in the lower portion. These are not pegged since they do not have to traverse the ports. In this manner, the working chamber is completely sealed from the crankcase and hence wet- sump lubrication can be employed.


I think that answers my question, but wasn't sure?
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ms51ves3: why does it need 500 miles? Are you teaching it how to be a piston?
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The Artist
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PostPosted: 14:52 - 11 Dec 2009    Post subject: Reply with quote
It is like a 4 stroke engine with only 2 strokes.

Meaning it has a sump, injectors etc but power/exhaust combined, induction and compression combined.

But the fact that they can run on either diesel or petrol is quite awesome and the variable compression ratio idea, clever stuff.
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ms51ves3
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PostPosted: 14:57 - 11 Dec 2009    Post subject: Reply with quote
allymoss wrote:
...and the variable compression ratio idea, clever stuff.


Clever stuff or more complication?
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the grim reaper
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Joined: 29 Jun 2005
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PostPosted: 15:03 - 11 Dec 2009    Post subject: Reply with quote
ms51ves3 wrote:
allymoss wrote:
...and the variable compression ratio idea, clever stuff.


Clever stuff or more complication?


No more complicated than the cleaning of diesel emissions that goes on at the moment, or than VTEC, or VVT etc etc

Cheers

Grim
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ms51ves3
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PostPosted: 15:18 - 11 Dec 2009    Post subject: Reply with quote
the grim reaper wrote:
ms51ves3 wrote:
Clever stuff or more complication?


No more complicated than the cleaning of diesel emissions that goes on at the moment, or than VTEC, or VVT etc etc

Cheers

Grim


But for a 2 stroke, it's very, very complex.
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Alexio
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PostPosted: 17:44 - 11 Dec 2009    Post subject: Reply with quote
ms51ves3 wrote:
But for a 2 stroke, it's very, very complex.


It would probably be cheaper to just use a twin 4 stroke engine rather than how complicated this is, but that really isn't the purpose of this research I guess. If they can slowly make an uncomplicated 2 stroke that behaves in this way then that would be good for all.
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will never give up his CG. I look at my fuel gauge more as a progress bar than a fuel gauge.
G: With my GSXR I do often effectively use it as a scooter with a clutch in town.
ms51ves3: why does it need 500 miles? Are you teaching it how to be a piston?
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Old Thread Alert!

The last post was made 16 years, 57 days ago. Instead of replying here, would creating a new thread be more useful?
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