Interesting engine design. - SV650.org

02-07-14, 02:28 PM

Interesting design. Rather than just bolting a generator to an otherwise standard engine this design completely removes the crank and makes the piston itself move the stator.

The electronic valves are an interesting development, the last I heard Ferrari and the like were trying to do this as it allows infinitely variable cam profiles. I hadn't heard of anyone pulling it off though.

http://www.roadandtrack.com/go/out-o...-toyota-engine

PyroUK · 02-07-14, 03:12 PM

Now that is some seriously cool tech.

Would those dimensions be roughly equiv to say a 500 parallel twin?

If so I am imagining a much lighter and quicker bike with an epic range!

yorkie_chris · 02-07-14, 04:17 PM

That's brilliant

Dipper · 02-07-14, 04:46 PM

Great idea! I'm wondering what returns the piston to the top of the stroke though...

PyroUK · 02-07-14, 05:01 PM

Gas spring chamber under the piston to return it

02-07-14, 05:20 PM

Clever! Most impressed that it's more energy efficient that during the kinetic energy directly.

02-07-14, 08:55 PM

So, potentially, you can have an entirely electric transmission with it's lovely instant full torque and just use that engine as a generator to top the batteries as and when required. Sounds promising to me.

embee · 02-07-14, 11:20 PM

The "free piston engine" concept has been around for donkey's years, see http://en.wikipedia.org/wiki/Free-piston_engine

I believe a few companies are seriously looking at units suitable for auto generator use.

NTECUK · 03-07-14, 06:12 AM

Quote:

Originally Posted by DJFridge

So, potentially, you can have an entirely electric transmission with it's lovely instant full torque and just use that engine as a generator to top the batteries as and when required. Sounds promising to me.

Vaxhall though so too.
Vauxhall Ampera is primarily powered by electric motors but has a four-cylinder combustion engine and generator to keep the car running when the batteries are exhausted.

andrewsmith · 03-07-14, 04:18 PM

Quote:

Originally Posted by DJFridge

So, potentially, you can have an entirely electric transmission with it's lovely instant full torque and just use that engine as a generator to top the batteries as and when required. Sounds promising to me.

Its a deltec (or however its spelt) idea which has done the british rail network for years

Quote:

Originally Posted by NTECUK

Vaxhall though so too.
Vauxhall Ampera is primarily powered by electric motors but has a four-cylinder combustion engine and generator to keep the car running when the batteries are exhausted.

Also Alexander Dennis coaches build a similar system (granted BAE systems inputted greatly on the design), which is now proven.

02-07-14, 02:28 PM	#1
SvNewbie Guest Posts: n/a	Interesting engine design. Interesting design. Rather than just bolting a generator to an otherwise standard engine this design completely removes the crank and makes the piston itself move the stator. The electronic valves are an interesting development, the last I heard Ferrari and the like were trying to do this as it allows infinitely variable cam profiles. I hadn't heard of anyone pulling it off though. http://www.roadandtrack.com/go/out-o...-toyota-engine

02-07-14, 03:12 PM	#2
PyroUK Member Mega Poster Join Date: Feb 2011 Location: Poole Posts: 1,083	Interesting engine design. Now that is some seriously cool tech. Would those dimensions be roughly equiv to say a 500 parallel twin? If so I am imagining a much lighter and quicker bike with an epic range! __________________ 2011 Triumph Daytona 675, Arrow exhaust and QS!

02-07-14, 04:17 PM	#3
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: Interesting engine design. That's brilliant __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

02-07-14, 04:46 PM	#4
Dipper Member Join Date: Mar 2011 Location: Hockley, Essex Posts: 398	Re: Interesting engine design. Great idea! I'm wondering what returns the piston to the top of the stroke though...

02-07-14, 05:01 PM	#5
PyroUK Member Mega Poster Join Date: Feb 2011 Location: Poole Posts: 1,083	Interesting engine design. Gas spring chamber under the piston to return it __________________ 2011 Triumph Daytona 675, Arrow exhaust and QS!

02-07-14, 05:20 PM	#6
Steve_God Guest Posts: n/a	Re: Interesting engine design. Clever! Most impressed that it's more energy efficient that during the kinetic energy directly.

02-07-14, 08:55 PM	#7
DJFridge Guest Posts: n/a	Re: Interesting engine design. So, potentially, you can have an entirely electric transmission with it's lovely instant full torque and just use that engine as a generator to top the batteries as and when required. Sounds promising to me.

02-07-14, 11:20 PM	#8
embee Member Mega Poster Join Date: Jul 2003 Location: Warwickshire Posts: 2,804	Re: Interesting engine design. The "free piston engine" concept has been around for donkey's years, see http://en.wikipedia.org/wiki/Free-piston_engine I believe a few companies are seriously looking at units suitable for auto generator use. __________________ "Artificial Intelligence is no match for natural stupidity"

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