Man, a smaller version of these would be awesome in motorcycles and scooters. Wonder what the MPGs are….
Company builds 500cc ‘one-stroke’ engine
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Re: Company builds 500cc ‘one-stroke’ engine
#12120 HP is 88kW. You could shrink this considerably & still have a very nice range extender. (Edited: proper conversion)
Re: Company builds 500cc ‘one-stroke’ engine
#13Here's a great deep dive into the engine, explaining the pros and cons: Yes it's simpler and more compact, but the lack of crank shaft means that it doesn't benefit from the lever effect of the shaft so it doesn't have as much torque. https://youtu.be/9I0_3qFmPUM
Then it’s perfect for a hybrid vehicle that uses electric when torque is needed
Re: Company builds 500cc ‘one-stroke’ engine
#14They admit it's two stroke, but they use that name because they have no oil in fuel and "it's cool". It's small, lightweight, perfectly balanced but has low torque so it's not a best fit for cars. Would be great for generator.
They're pretty explicitly marketing it as a "range extender" for hybrid electric vehicles. In the mockups in the article it seems like they don't have a traditional gearbox, so it sure looks like they're intending to suggest running it as a straight-up electrical generator even when mounted in a car. Neat application of the concept. Diesel locomotives have worked this way for a long time.
Re: Company builds 500cc ‘one-stroke’ engine
#15actually a two stroke, 2 opposing pistons in a common cylinder cycling through compression stroke-combustion-power stroke. no connecting rod to bend or break, and large cams replacing the crankshaft https://www.thedrive.com/uploads/2023/07/14/innengine-1.gif?... [Now, here's the thing: this motor isn't a one-stroke engine. It has a compression stroke and exhaust stroke, making it a two-stroke cycle. INNengine acknowl…
Indeed. My old bike had 1400cc and was rated at only 94 hp.
'old' may have something to do with it here, engine tech has seen all kinds of improvements over the last two decades resulting in tiny engines with ridiculous levels of output while still having reasonable life span. A pretty common small car engine that has .9 L displacement and a turbo yields 105 HP, that's 120 HP/L, vs 67 HP/L for your bike. A few years ago I had a 660 CC 4 cylinder engine in a car that did 67 HP so that's about 100 HP/L.
This engine is pretty clever, it avoids one nasty problem of swashplate drives and their cousins: the piston travel is only half here of what it would be otherwise. But there is a lot of extra complexity.
Re: Company builds 500cc ‘one-stroke’ engine
#16Man, a smaller version of these would be awesome in motorcycles and scooters. Wonder what the MPGs are….
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Re: Company builds 500cc ‘one-stroke’ engine
#17120 HP is 88kW. You could shrink this considerably & still have a very nice range extender. (Edited: proper conversion)
Many cars use only 20kw to go highway speeds, imagine if this could shrink to 1/8th its current size.
Re: Company builds 500cc ‘one-stroke’ engine
#18That's neat.
This is a type of axial engine, a cam engine.[1] People have been trying designs along this line since at least 1926. A recent version was from Axial Vector Engine, which was pushing their stock around 2006 and is now gone.[2]
The problem with this class of designs is that they apply large forces to small parts. The most likely source of trouble is the bearings of those little wheels at the base of each piston. Those have to take the full force of the explosion on each cycle. That doesn't mean it's impossible, but it means it's a long way from the first running engine to one with a long, useful, low-maintenance life.
[1] https://en.wikipedia.org/wiki/Axial_engine
[2] https://web.archive.org/web/20090208215443/http://www.axialv...
Re: Company builds 500cc ‘one-stroke’ engine
#19actually a two stroke, 2 opposing pistons in a common cylinder cycling through compression stroke-combustion-power stroke. no connecting rod to bend or break, and large cams replacing the crankshaft https://www.thedrive.com/uploads/2023/07/14/innengine-1.gif?... [Now, here's the thing: this motor isn't a one-stroke engine. It has a compression stroke and exhaust stroke, making it a two-stroke cycle. INNengine acknowl…
why I feel like this would put pressure on one side of cylinder block due to non-linear force against bottom wave-plate and cause wear and tear?
Re: Company builds 500cc ‘one-stroke’ engine
#20Would this be good in a bike? Would it likely be more power than say my R1?