With animated cartoons everything works great !

Has Dimethyl ether (DME) been used, or considered? Would this device be able to use it as fuel?

Breakthrough technology. Compared with invention of combustion engine. Hope to see it in hybrid vehicles soon.

@brianb-p6586

5 ай бұрын

No, it's no a breakthrough at all. It might be a useful advancement, for some applications, but that advancement was made decades ago.

this could be huge! even burning CNG/LPG that is already cleaner then petrol/diesel! imagine if it could work with renewable DME or Bio/Green Methanol! The Marine industry have identified Methanol as next gen emission cutting biofuel so i can see scaled up and being modular these generators installed on ships and using electric propulsion resulting in huge emission cuts in that sector!

@ericlotze7724

3 ай бұрын

Wait *another person who knows about DME?* HELL YEAH

What are the Tailpipe Emissions from this?

@jannehokkanen8175

9 ай бұрын

Zero. it will never run.

@brianb-p6586

5 ай бұрын

The same as any other internal combustion engine.

@dwaynesykes694

3 ай бұрын

Worse than traditional internal combustion engines due to a number of factors. Dumping enough $$$$$$$$ into R&D _might_ make them tolerably efficient with enough software fixes for hardware shortcomings.

how does it start??

@marcmaza2821

10 ай бұрын

By far one of this biggest joke companies I ever work at! It super sketchy working there!

@clivesutcliffe487

5 ай бұрын

How does any engine start? Stored electrical energy in the form of a battery.

How do you induce compression?

@teardowndan5364

5 ай бұрын

The only difference between a linear generator and a linear motor is whether the energy is being drawn out or put in. Drive the coils as a linear motor to get things started.

@alexwalker8422

5 ай бұрын

​@@teardowndan5364I thought it would require connecting the pistons from other cylinders together to achieve this, but apparently Toyota has already made air springs which do the same thing that would.

@teardowndan5364

4 ай бұрын

@@alexwalker8422 They don't need any physical connections. You give each linear generator its own driver-rectifier and then setup the drivers 360/N degrees out of phase from each other. As a bonus, if you have more than one piston, you also get the option of only running as many pistons as necessary to accommodate the load and individually shutting off defective pistons with no further adverse effect than the loss of peak generator power.

Hi Is it self ignited unit caused by compression or spark ignited system? Which type of piston sycronization used?

@brianb-p6586

5 ай бұрын

This animation omits all of the "details", including the scavenge blower, cooling system, fuel delivery system... and yes, the ignition system or direct fuel injection system. Either spark ignition or compression ignition would work in this style of engine, but it is usually proposed for heavy fuels with compression ignition, and a hydrogen or natural gas engine would need spark ignition.

I actually came up with the FPEG concept independently while sitting on the loo 😊. These have the potential for the highest possible power/weight ratio of any engine because the only moving parts are entirely solid, so they could operate at at insanely high RPM's, eg I'd expect 100 times/second or 60,000 RPM to be on the low end of what these things are capable of. There's also Stirling engine versions that could revolutionise power generation, epecially by being able to use the usually wasted 'low grade heat' from industrial processes, power plants and ICE cars to generate power. For example: hybrid cars could use ICE engines or opposed piston linear generators as range extenders, and the Stirling version to make power from the waste heat, instead of wasting it with a radiator. Stirling and ICE FPEGs could also power homes and electric vehicles from backyard greenwaste, and using the heavily suppressed technology of Fast Microwave Assisted Pyrolysis turn greenwaste into Methanol fuel and plastic/rubber and household waste into various types of hydrocarbon fuels. ABSOLUTELY check out Fast Microwave Assisted Pyrolysis (!!!), because it could easily solve the waste, energy, fuel, renewable power intermittency and CO2/global warming crises in one fell swoop, using it to turn trash into fuel costs less than making the same fuel from oil, it locks away carbon in soil enriching biochar and can be used to turn CO2 into fuel, and there's more than enough waste to power civilisation without ever extracting another gram of fossil fuel, which would destroy the fossil fuel industry, and that why it's so heavily suppressed by that industry, for example, it's never shown by the KZread algorithm, yet if you search the net you'll see heaps of scientific papers and pilot plants showing its amazing efficacy.

@taciusa

10 ай бұрын

amazing, where can I get those informations?

@brianb-p6586

5 ай бұрын

Free piston linear engines have been around for a long time, in many variations. Yes, you can "come up with" the idea yourself, not realizing that you are assembling information which you have seen over the years, and so can everyone else... so have at least tens of thousands (and probably millions) of other people.

@alexwalker8422

5 ай бұрын

Even more reasons I have to despise whoever keeps preventing these things from coming into the light.

@brianb-p6586

5 ай бұрын

@alexwalker8422 no one keeps these things from coming into the light. I've known about linear engines and generators for decades, and I have absolutely no inside source. In the harsh light of day, they can be seen to not be of any value, so they are not used.

@libertine-linearpowersyste8203

4 ай бұрын

​ @brianb-p6586 A few tens of Linear Generators are in commercial use in the US today (see Mainspring) and we see significant growth in the category this decade, after ~3 decades of nearly-but-not-quite (Sandia Labs/GM, Volvo, DLR, Toyota). What's changed? Market: Need for firm distributed generation from low carbon fuels to complement solar for lower utility costs and increase resilience (e.g. Lineage Logistics) Technology: Modern power electronics and control hardware make software controlled Linear Generators technically feasible

There is obviously more to this than has been disclosed. The most obvious being how do you cool the piston when it is subject to combustion on both sides. Also the shakes , perhaps this could be solved with two units in line that are synchronised to move in opposite directions. Previous free piston engines have been about pumps and compressors. So not really a new idea

@brianb-p6586

5 ай бұрын

Each piston is only subject to combustion on one side, like every other opposed-piston engine. This variation doesn't shake because the two pistons move equally in opposite directions, balancing each other out... again like any in-phase opposed piston or even "boxer" opposed-cylinder engine. I agree that this is not a new idea. The application to drive linear generators has become more attractive, and control of those generators to control the piston stroke has been enabled by modern electronic systems.

@teardowndan5364

5 ай бұрын

The piston heads have a pretty large heatsink in the form of the magnet they are towing and the air-spring churning behind it transferring that heat from the magnet to the cylinder, no problem there. Opposing piston engines have practically perfect balance, no idea where you get the shakes from. As for sync, if the pistons, magnets and coils are sufficiently well matched, it could be as simple as splitting coils in 3+ phases and paralleling them. Position mismatch would produce an error current that could be enough to correct the error.

@dwaynesykes694

3 ай бұрын

@@teardowndan5364 magnets and heat don't get along. Also, don't confuse thermal mass with something's ability to dissipate heat. Having more thermal mass just means it'll take a bit longer to heat up. If that heat has nowhere to go it'll still overheat. Conventional engines cool the underside of pistons with oil. Curious how it'll be accomplished here.

@teardowndan5364

3 ай бұрын

@@dwaynesykes694 Neodymium magnets have a Curie point in the 300C to 400C range while engines typically operate at about 100C. No problem there, just use a standard cooling jacket on the combustion chamber. As for how the back of the piston gets cooled, I guess that means you don't know that an air spring can also act as a simple heat pump: air gets compressed between the piston and back housing during the power stroke, gets hotter from compression, transfers heat to the colder housing, then air expands again during the compression-ignition stroke, gets colder and sucks heat out of the hotter magnets-piston assembly, rinse-and-repeat.

@dwaynesykes694

3 ай бұрын

​@@teardowndan5364 The currie point isn't relevant, the operating temperature is. Most neodymium magnets start to lose magnetism around or below 100C and have max operating temperatures at or below 150C. The coolant temperature of a conventional engine is meaningless here. That's not the same as the temperature of the piston. Oil temperature in conventional engines usually runs close to 120C, so that's already a higher number than your claimed 100C and quite close to the 150C max operating temperature of a strong magnet. The actual pistons in a conventional engine are far, far hotter. As for the heat pump effect, that's irrelevant. Any adiabatic cooling (i.e. decrease in temperature from expansion) is countered by adiabatic heating. It's a net-zero effect if the naive calculations are used, and a thermal energy gain in the real world due to friction between gas molecules (air's viscosity isn't zero). Air has low thermal effusivity and specific heat, in layman's terms, it's really bad at cooling stuff down. If air was so great at cooling, conventional engines wouldn't need liquid cooling. Even "air cooled" engines are really oil-cooled.

First fridge

This video is extremely simplified, and it wouldn't work as shown. Where's the intake and exhaust systems? It would need more than holes in the cylinder... After combustion pushes it out, what makes it return? Are the moving parts riding on an internal shaft supported only on the outer end?

@MadScientist512

Жыл бұрын

It really is as simple as holes in the cylinder just like 2 stroke engines use, the clever trick's in the timing, the exhaust opens first at one end and then the intake opens at the other end, so that the rapidly leaving exhaust at one end pulls in fresh air from the other end; Engineering Explained did a great video on opposing piston engines.

@brianb-p6586

5 ай бұрын

No,@@MadScientist512, just port timing isn't enough for effective operation. As with all practical uniflow (opposed-piston, or piston ports for intake and cam-controlled valves for exhaust) engines, a scavenge blower is needed.

@alexwalker8422

5 ай бұрын

An induction motor assisted turbo or supercharger. The induction motor assisted turbo would spool up and introduce sufficient pressure to circulate air through the cylinders and exhaust produced after the "engine" starts would be sufficient to keep the turbo going if not at least come close to doing so. The induction motor would not impart drag to the turbo rotor shaft after being turned off. If "rpm" variation is required, the induction motor would be able to eliminate most of not all turbo lag. This should be normal wherever turbos are used already.

@alexwalker8422

5 ай бұрын

I wish I could be certain tbh, I cannot say I am 100% accurate about the induction motor powered turbo not needing to use electricity to keep spinning. Either way, the airflow question is a decently easy requirement to solve. Mechanical opposed piston engines use superchargers as a way to force air through their cylinders, but I would rather have a motor assisted turbo to prevent parasitic draw of torque from the crankshaft which does result from using a supercharger.

@libertine-linearpowersyste8203

4 ай бұрын

Libertine use an e-boost supercharger for development flexibility, production systems are likely to use an e-turbo to reduce parasitic loads, some applications can use self-scavenge via stepped piston solutions@@alexwalker8422

gas finally be used

Total nonsense. How are you going to synchronize the two pistons without some sort of mechanical linkage? And if you add that, wouldn't this mean reinventing the century-old opposed-piston Diesel engine?

@fpxy00

7 ай бұрын

Syncing could be done via control of spring gas chamber or via electromagnet or both.

@brianb-p6586

5 ай бұрын

The linear motor-generators would synchronise the piston motions. Yes, this is simply the long-established opposed piston engine, but with linear generators and gas springs instead of two connected crankshafts (or one crankshaft and enormous rockers).

Simple calculation 0.8 cc gives 32 hp 1.6 cc gives 64 hp its less than the ordininairy engine

@johnarnold893

8 ай бұрын

If a 1.6 cc engine delivers 64 hp then a 5.7 l engine would deliver 228000 hp, lol

This is a very old fairy tale. If it was technically and environmentally possible, it would have been in production 5 years ago.