Comments on: LiquidPiston unveils its ultra efficient, small diesel engine

By: Tim Page

Tim Page — Sun, 23 Dec 2012 07:16:04 +0000

Ok I work offshore and a smaller Diesel engine would be great for out jet pumps. but does it have the torque?

By: MorinMoss

MorinMoss — Sun, 21 Oct 2012 12:38:30 +0000

If you bother to read the description of that YouTube video, it clearly states that this is due to gov’t regulations that have been around for decades and has been supported during that time by both parties.
So you haven’t been lubing up for just the Obama bogeyman you fear so much.

By: Crooked Administration

Crooked Administration — Thu, 18 Oct 2012 21:18:34 +0000

It will be interested if the government lets it into the market…

We make engines in this country that our government wont let us use because they think it will diminish tax revenues (as if somehow people are not going to spend the ‘extra’ discretionary income that they would have on gas). This is Obummer screwing us, not just the big Oil a-holes.
vw TDI
http://www.youtube.com/watch?v=uBnlXGvA1Wk

By: 2fat2fish

2fat2fish — Thu, 18 Oct 2012 19:42:11 +0000

Better question is how much torque…..

By: Bob

Bob — Thu, 18 Oct 2012 17:15:55 +0000

I think the comment of typical diesels being less that 20% efficient is way off base.

By: floram

floram — Thu, 18 Oct 2012 04:14:23 +0000

Torque is directly related to displacement and is equal at same mean effective pressures at same displacement. Of course the tiny one will have much less torque but makes its HP by high enigne speed. Not a true comparison.

I agree with ‘Sceptic’ on the large surface area and hence large heat losses that would not allow the claimed efficiencies.

Sealing will be another big problem mainly at both sides of the rotor and at the junction with the stationary apex seals. How will this be done? This design was around before and was abondoned.

By: Casey Winans

Casey Winans — Thu, 18 Oct 2012 01:17:06 +0000

They compare their tiny engine to that huge diesel engine based on horsepower, but never mentioned if it can touch it regarding torque. That is one metric I’d like to hear about.

By: Dave

Dave — Wed, 17 Oct 2012 20:11:58 +0000

I know a wankle engine when I see one! Great idea.Small and less moving parts.

By: skeptic

skeptic — Wed, 17 Oct 2012 19:23:54 +0000

Combustion chambers have huge surface area just like a Wankel, a major cause of heat loss and inefficiency in that engine. I’d like to see the independent tests.

By: BIGfish

BIGfish — Wed, 17 Oct 2012 15:38:44 +0000

The idea is similar to a Wankel engine, but turned on its head. Check out this article from Popular Mechanics for more: http://www.popularmechanics.com/cars/news/auto-blog/liquidpistons-hyper-efficient-engine-turning-the-rotary-inside-out-13817971?click=pm_latest