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Lotus Omnivore Concept Engine

The OMNIVORE engine concept employs novel engine architecture to achieve high thermal efficiency when operating on any mix of alcohols or gasoline.

User Comments

Seth Hersch commented on 09 Sep 2009

In fairness, two strokes are only on the outs because they have traditionally contributed heavily to pollution, but a direct injected, wet sump, variable timing engine that doesn't run on mix circumvents the problem entirely. A two stroke is more efficient just by virtue of its being a two stroke: for every rotation of the crank a given cylinder has one power stroke, as opposed to a four stroke where you only get a power stroke every two rotations...this is a big deal that Lotus is doing this.

LetsRide738 commented on 15 Jan 2011

2 stroke engine are more powerful that 4 stroke. problem is 2 stroke wast fuel but 4 stroke dose not. when the piston in the 2 stroke is at bottom dead center, the fuel inlet/oil, And Exhaust port are all open. as the fuel is sucked into the engine, some fuel exits the exhaust port unburned. How ever 4 stroke use valves. There are 4 strokes to the engine obliviously why its called 4 stroke, Suck, Squeeze, Bang, Blow. It dose not wast unburned fuel, if yr valve timing if wrong it will backfire.

Steven Peterson commented on 24 Jun 2011

@LetsRide738 You fail to see that the exhaust valve on the Lotus motor is indeed closed when the direct injector shoots fuel when the piston is on its way up. This technology now makes your explanation of a "traditional" 2-stroke more not apply to this application. Also, this motor decreases exhaust emissions with the Charge Trapping Valve. When the engine is at 100% load, it emits all of its exhaust gasses because at that load, fuel is completely burned.

josephtan1818 commented on 29 Dec 2010

if I'm not mistaken, this engine is combining of both subaru and chrysler's design, both chrysler and subaru has blower but subaru use rotary valve while chrysler has fuel injector, both design has oil sump. this engine need a supercharger or hybrid turbo to work. hybrid turbo work like electric blower for starting, once there's enough exhaust flow, the turbo will run on its own to pump the air into the combustion chamber.

Seth Hersch commented on 16 Dec 2009

@wealthychef Traditionally, two strokes have had vibration issues because the cylinders are often bored elliptically to counter the natural tendency of rounding under immense asymmetric heat. Also, because the exhaust port remains open throughout the entire operation in most two strokes, the pistons are often machined asymmetrically to control the flow of air and fuel. This engine appears to share none of these problems.

7r1pp4 commented on 19 Apr 2015

A 2stroke inline4 with conventional flatplane crank would function very similar to a parallel twin. However if this has a crossplane crank with 90 degree firing intervals, you'd be able to reap the benefits of smaller yet still evenly spaced intake/exhaust pulses AND superior primary balancing. Ether way, this is easily the most awesome internal combustion engine design since the Lancia Triflux!!!!

TheOfficialKC commented on 29 Jan 2012

Nice to see Lotus working on a 2-stroke engine, but they pretty much destroyed the whole reason to go with a 2-stroke: light weight and simplicity. All that control for the compression ratio, etc. That looks heavier than a 4-stroke. Forget the multi-fuel application, you could drop 100lbs from a Elise/Exige and gain 100hp with a standard DI 2-stroke.

Heutske commented on 24 Jul 2010

@wealthychef that is only when you use a one- or two-cylinder bike. for cars, they use at least 4 cylinders, which reduces the vibration. So it shouldn't be any different from any standard 4-stroke car-engine. I would do a kill to own a car with a 2-stroke V6 or V8 engine with direct fuel injection!! lol can you emagine how many power that delivers?

Paul Bubnash commented on 14 Feb 2016

glad a company like lotus is still doing research into two strokes. one like this that clean enough to meet EPA standards could change at least the performance world. the power to weight ratio of something like this would be insane. especially if you can actually run the max 40:1 compression ratio. Beautiful

Bazawaza1 commented on 25 Aug 2011

The direct injection i like , and the wet sump . But the exhaust fuel trapping valve looks a little over complicated surly it would be better to have a rotating bobbin valve arrangement a'la YPVS ? two strokes aren't dead after all ! Lotus , can we have a 1000 cc lotus omnivore motorcycle please ?

Steven Peterson commented on 24 Jun 2011

@LetsRide738 The only time the fuel is not completely burned is when the engine is at idle or at low RPMs, which the CTV timing is changed to allow minimal emissions out the tailpipe, allowing the engine to burn a good portion of the unburned fuel still in the combustion chamber.

rickardondover commented on 11 Dec 2009

2 strokes aren't dead. I have at least 3 of them right now, including a brand new 150 HP Evinrude outboard. A high torque engine that can consume many fuels has lots of applications in a whole bunch of places in the world where gasoline is either of low quality or not available.

FrankieJames7 commented on 15 Aug 2012

50:1 compression ratio is complete bullshit, diesel ignites in the 500 range...50:1 is in the 700 range of PSI...gasoline will need to be like 300 octane to not ignite at over 700 PSI...even at the lowest idle highly atomized gasoline will never run smoothly in 700 psi

josephtan1818 commented on 26 Oct 2010

when this engine become outboard engine, this things will say bye bye to yamaha and evinrude etec crap because yamaha and evinrude etec engine, being fuel injected 2 stroke but still burn lubricant and this engine doesn't burn lubricant since it has sump system

josephtan1818 commented on 03 Jan 2011

the most complex 2 stroke petrol design was toyota design, it has intake valve and exhaust valve driven by cam shaft running at crank shaft speed with the blower charging into the cylinder, the engine was v6 engine based on the company's 4 stroke engine

Jdspitz2 commented on 12 Dec 2009

Its just a high tech 2 stroke engine that doesn't require mixed gas or oil injection. The main benefit of it is the amount of HP it will produce for it's size/weight and the power curve that it will have. Sort of like a Mazda RX-7 or RX-8

rnrbishop commented on 14 Dec 2009

the idia is, the engine isnt wasting fuel turning a heavy crank to power three unproductive strokes, instead of one. Power output will increase from a smaller displacement, without increasing emissions.

1978atcarroll commented on 07 Aug 2011

that would work great, until it started to get old. as it aged, more and more shit would wear out. i'll bet it would damned expensive to maintain once it hit about 10 years old or 100,000 miles.

Seth Hersch commented on 16 Dec 2009

I think you get water via most combustion reactions, but not all. I don't believe the combustions of pure carbon, carbon monoxide, or sulphur produce water. I may be mistaken.

soupisgoodfood commented on 11 Dec 2009

2 strokes are nearly dead? Hardly. And with better technology, such as improvements like this, it's not going to die out anytime soon.

gyrenejoe commented on 11 Dec 2009

You get water when you burn alcohol, so you have to be very careful with your lubrication system and the type of oil you use.

Seth Hersch commented on 16 Dec 2009

You do get water when you burn anything with hydrocarbons, though. Most fuels use hydrocarbons as a burning agent.

eamh2002 commented on 07 Jun 2010

Well, they have fuel injected Di-Tech scooters that make more power than carbed scooters.. And Gilera Pure-Jet.

greencheapsk8 commented on 31 May 2012

Supercharging or Turbo for two strokes is good idea. Then fuel does not have to go through the crankshaft.

jordanmirander commented on 07 Nov 2011

this is the only car video that I didn't hear any audio. plz, contact me to help me fix it.

kasep pisan commented on 29 Sep 2011

2Stroke engine with direct injection, high fuel efficiency, low emission, and more powerful.

Lucas Silva commented on 28 Dec 2011

Can two stroke engines be turbocharged (or supercharged too) ?

exile0025 commented on 07 Mar 2009

That's rather neat. Any side-effects from the use of alcohol?

TheOfficialKC commented on 29 Jan 2012

@Lcs2k Yes. People turbo 2-stroke snowmobiles all the time.

chris lomas commented on 31 Oct 2013

This can be Supercharged also.4 strokes are old stuff.

Lotus Exige 270E Tri-Fuel

Capable of running on any combination of Gasoline, Ethanol or Methanol the Lotus Exige 270E Tri-Fuel is the latest car to showcase innovation from Lotus ...

User Comments

lotusengineering commented on 26 Aug 2008

Hi Jeffgooloolie, The Exige 270E Tri Fuel uses a supercharger as a method of forced induction, rather than a turbo. This is exactly the same supercharger as used on a 'regular' Exige S. The only differences between an Exige S and the 270E Tri Fuel are the addition of a sensor to detect which fuel is being used (or any combination of the three). The fuel lines have also been upgraded along with calibration changes to the ECU. Thanks again for your interest. Lotus Engineering

Ameen Rahman commented on 11 Sep 2011

i met the engineers at the display in my workplace with regards to this car (they were also displaying sound technology for the electric cars as well), we had a good chat, about how lotus were working on a infrastructure for methanol etc. Like many many people, i don't want to see the end of combustion engines. Like the engineer said, until the law allows methanol to be used as an everyday fuel, things like this will only stay as concepts.

jeffgooloolie commented on 26 Aug 2008

Interesting that Lotus doesnt tell anyone that this particular concept is using a turbo. They make it seem like Methenol is the only difference between the 270 tri fuel, and a regular Exige.

jose plascencia commented on 05 Jun 2011

How bout an E85 conversion kit for the Lotus and other 2zz ge engines in the road. I would love to consume insane amounts of petrol without a second thought.

Guitar Zeroh commented on 24 Oct 2012

f'ing brilliant. amazing times considering the fossil fuel (cough cough) past...?

Adrenaline Filled Dreams commented on 21 May 2011

Do you sell a ecu tune for tri-fuel to the public? I would love one for my Lotus

Pixel.xo commented on 27 Jun 2012

Is there any aftermarket kit for the Methanol, that is made using CO2 ??

weffew commented on 11 Dec 2009

There's already an electric lotus. It's called the Tesla.

herrlip72 commented on 31 Jan 2009

Think this is the way to go, without a doubt

Thr33pladdy commented on 17 Sep 2009

i hope you realise HOW LUCKY YOU ARE

Lotus Elise Engine Out

Lotus Elise prepared to receive new engine. I finally got around to putting it together.

Play and Drive - Lotus Elise S1 Full Electric Race Car Proto E 15 closed road

Una prueba de aceleración al 60% de potencia en calle cerrada.

Lamborghini Gallardo Spyder, Ferrari 355 Spider, and Lotus Elise

3 cars outside lambo of westmont.

Lotus Evora Promo

VVA Final.mov

The Versatile Vehicle Architecture (VVA), used on the Lotus Evora, is a low volume evolution from the architecture used on the Lotus APX concept and allows for ...

User Comments

shkorina commented on 11 Apr 2010

i think im in love..............................

lotus

One tired Goober about trail breaking

Michelle Fonseca does an impromtu interview with Racing Coach, Matt Treglia at Grand Prix West, at the Willow Springs Raceway in Rosamond, California.

User Comments

juveniled16si commented on 10 Dec 2010

Yeeeah.. the supra pace car from willow springs..!!! Lol, thats koo!

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