EXPERIMENTAL Rotary Internal Combustion Engines

These are variant rotary vane engines implemented as 2 separate, axially coupled stages: an intake/compression stage & a combustion/expansion stage. The primary design objective is improved fuel efficiency.

The engines are coupled to a starter motor which doubles as a dynamometer. Independent combustion & expansion ratios over 20:1 can be set to accommodate various fuels & for attaining the highest efficiency (currently ~10% & rising steadily as seals are improved).

Wear surfaces & seals are graphite-on-steel whose miraculous lubricity & wear properties allow sustained operation without cooling or oil! Intake & exhaust profiles are smooth & practically continuous, reducing manifold effects & exhaust noise. Holding the vanes 'out' with solenoids provides an efficient means of throttling (by adjusting their duty cycle) since the rotors spin freely without any pumping losses. This makes it easy to gang stages & use them only when needed. Every power stroke (1 per revolution) occurs at maximum intake volume (no partial aspiration losses).

I've been tinkering with ICEs for over 20 years in my spare time. These designs represent thousands of man-hours & a graveyard of previous prototypes. The program continues; 3 more models are currently on the drawing board. These ideas are offered with the hope that they may be inspirational & useful (or at least fun). Anyone interested is encouraged to build their own prototypes & to improve & apply these designs in any way that they see fit. -Dave

Category:

Autos & Vehicles

Tags:

• rotary
• internal
• combustion
• engine
• alternative
• energy
• fuel
• hybrid
• efficient
• hydrogen
• gasoline
• biodiesel
• oil
• experimental

[FiasaPower]

How much power can it produce ?

[RotaryICEman]

A couple of horsepower with fresh seals.

[RotaryICEman]

I continue to get allot of requests for blueprints & more detailed information. Note that it's all posted on the "Open_RotaryEngine" Yahoo! group. There are hundreds of files there including: sketches, code, schematics, pictures, commentary, etc.

[1kera]

I like model 23 because it has 2 vanes per rotor, looks like it's getting 2 combustion per revolution. Are you going to install second set of vanes on Model 32?

[RotaryICEman]

I used to think that multiple vanes per rotor would be better. Turns out that from an efficiency point of view, a single vane can be more efficient. Yes, 2 vanes produces 2 combustions per revolution (with twice as many seals), but the combustions are half the capacity of a single vane approach, so it washes out. Multiple vanes (or pistons) can help an engine to run smoother, but my models barely vibrate at all.

[RotaryICEman]

NOTICE: I've finally posted a paper on the theory of operation, and a proposed powerplant application. It's a first draft, and it's incomplete, but it's a start. It's up on the Yahoo! group. I always try to reply to all the messages that I receive, but note that it may take me a week, or more to do so, so please be patient. Thanks for all your comments, and feedback.

[yontopapa]

Felicito a todos quienes han estado construyendo estos motores. Si analizamos profundamente el sistema de pistón y cilindro, seguramente llegaremos a la conclusión de que se ha seguido usando porque deja jugosas ganancias a la industria automotriz mundial; pero no por ser lo más eficiente y conveniente para combatir el cambio climático. Les recomiendo vean: The Best Rotary Engine, how it works que es otro intento eficiente de Motor Rotativo.

[maxneu]

In terms of power per litre of displacement, how does this compare with conventional engines of similar size?

[meadowbrook11]

dats awesome

[RevanantGod]

wow thats quite

[Electrorod1]

A stationary blade compressor has an

outer roller on the rotor itself. if you look

at the design, it's a bit better, I'm sure you'll agree. Also, if you make the seals

like a spring loaded brake calliper, with inner and outer sets, with lube in between, fed thru the axel, and pumped

by the blade, you'd have a very long lasting

seal, that works better. The oil comes

from between the eccentric and the outter

roller, and returned and cooled, in a closed loop fashion.

[Electrorod1]

Did you know that this was once a steam engine. Over a hundred years ago. It had

seal problems that robbed it's efficiency.

As a compressor, it is used widely in the

AC/Refridgeration field. It is known as a

Statioary Blade Compressor, a rotary vane is altogether a different one.

[1kera]

Thanx for reply. Can't wait to see the next model