Clean Motors

Continuous Combustion Rotary Engine : High torque, low RPM, zero vibration, potentially oil free, fast acceleration, less noisy, less polluant, and high power density in volume and weight. Reversible Engine for hydraulic, pneumatic, steam, gasoline, diesel, natural gas, ... photo-detonation mode and hydrogen compatible Compressor or pump without any check valve or obstruction.
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Angel Labs
"Angel Labs is a technology company that will change the world for the benefit of Mankind.

I have granted 100+ inventions accumulated over the last 22 years of my life that cover land, sea, and air, to Angel Labs, LLC. I believe I have been blessed to these unique, simple, but revolutionary inventions. I also fully understand that gift accompanies responsibility ... that is to spread these inventions into products for the world as soon as possible.

Angel Labs was formed to provide the most efficient, precise, quickest way to develop and launch these inventions. Angel Labs will apply modern computational techniques, including finite element analysis, thermodynamics, fluid dynamics, structural analysis, etc., for ultra fast product turnaround. The end products will help preserve environments, will be inexpensive to produce, safer to use, and will be designed to require lower maintenance.

Angel Labs is composed of inventors, scientists, Engineers, business managers, computer technicians, programmers, machinists, Engine experts, patent attorneys, business consultants etc. Most of these people have been very close and trusted acquaintances with me for the last 25 years. Initially, we will work on one invention at a time until the invention becomes a product and released to the world. As Angel Labs grows, different teams will be able to develop individual and numerous inventions simultaneously under my direction. Ultimately, the goal is to introduce several revolutionary products every quarter of the year. Angel Labs is a close-knit family of professionals working as a team to make my inventions into viable products." ... more

BB Motor Corp
"Our Mission is to bring cutting edge alternative energy products first to the United States and then to the world. This will be accomplished by manufacturing and distributing the first ever power plant that can truly be referred to as "GREEN". Our goal is to supply state of the art "environmentally friendly" motors and generator units worldwide. We seek to do this by employing, engaging and empowering Americans to build truly world class products, in state of the art, high tech facilities under world class conditions, thus evoking pride in our product, our country and renewing the definition of "Made in America."

"By having excellence in product, and providing Service that outshines our technology, BB Motor Corp,LLC will engineer, produce and distribute affordable alternative energy products designed to create a cleaner and more prosperous America. We will do this by reducing our country's dependence on fossil fuels and imported oil and providing a "New Type of Freedom" to all people everywhere. Freedom in the marketplace, Freedom to live where you wish, and Freedom to travel unencumbered by fuel restrictions."

Products
    - The J.I.M.S. engine (shown above), is the most revolutionary engine to be released to the public in recent years. Since the current means of power is the combustion engine, we will try to describe the differences comparing it to the V-8 engine.
    - The V-8 engine generates 4 cylinder "firings" per revolution. The J.I.M.S. engine generates 24 cylinder "firings" per revolution. The use of the word firing is for comparison purposes as the J.I.M.S. engine does not "fire" in the sense of burning fuel.
    - The average torque for the V-8 engine is 225-400 lbs, the torque for the J.I.M.S. engine is estimated to be in excess of 100,000 lbs*.
    - The average V-8 engine has 137 moving parts (not counting all the moving parts in the distributor and carburetor), and the J.I.M.S. engine has 5.
    - V-8 engines run at an average rpm range of 800 to 4000 and the J.I.M.S. engine is designed to run at 50 to 700 rpms.
    - Due to the lack of combustion firings and moving parts, the estimated life expectancy of the motor is 1,000,000+ miles.
    - Due to the lack of moving parts, we anticipate servicing and/or rebuilding of the motor to be a fraction of current motor expenses.
    - The horsepower and torque will vary, based on the actual PSI and gallons per minute that are used to drive the motor." ... more

PlasmERG

"The principle of the Plasmic Transition Process (tm) type engine is very basic and simple although complex in Physics terms. A sealed gas chamber, created by the Piston, Cylinder and Head, creates the TRANSITION chamber, is initially filled, with a "gas mixture charge" comprised of relatively inexpensive, abundant, and harmless, and SEALED. Thus this is a ZERO Carbon Footprint Engine. The gas mixture is subjected to a precision controlled Process, by our Electronic Control System (ECS), exciting the gases, an ionized atmosphere. A trigger is applied which causes the powerful Plasmic Transition Process (tm) expansion, now Patented by Inteligentry, our partner. Removal of excitation causes a return to the steady gas state causing partial vacuum and negative thermal spike, leaving the gases ready to cycle again. Note: that the plasma is not, in any way, maintained, thus called a "pseudo plasma", so it can be "pulsed", as "others" would like you to "believe".

"One thing you may wish to notice; there is no air intake or exhaust. This engine does not need oxygen to operate nor does it expel anything. Thus it's virtually atmospheric pollutant free, AND QUIET!!!. ZERO Carbon Footprint AND it creates no discernible heat. So there is no coolant or radiator either." ... more

Millennial Research Corp.
"MRC Founders have created a true 21st century motor and generator technology. The Founders and Executive Team drive continual improvement processes and provide dynamic leadership into new market segments.

With technology like this, it really is hard to keep a lid on the excitement, but we give it all we have and keep our focus by delivering significant value to our clients and partners every day." ... more

"Engineair Pty Ltd, based in Melbourne, Australia is a company focusing on the development of air motor technology based on a unique rotary piston concept.

Different from conventional air motors, the Engineair motor invented by Angelo Di Pietro, has virtually eliminated vibration, internal wear, friction and offers superior performance for a wide variety of applications.

The Di Pietro motor
The Di Pietro motor concept is based on a rotary piston. Different from existing rotary engines, the Di Pietro motor uses a simple cylindrical rotary piston (shaft driver) which rolls, without any friction, inside the cylindrical stator. The space between stator and shaft driver is divided in 6 expansion chambers by pivoting dividers. These dividers follow the motion of the shaft driver as it rolls around the stator wall. The motor shown is effectively a 6 cylinder expansion motor.

The cylindrical shaft driver, forced by the air pressure on its outer wall, moves eccentrically, thereby driving the motor shaft by means of two rolling elements mounted on bearings on the shaft. The rolling motion of the shaft driver inside the stator is cushioned by a thin film of air. Timing and duration of the air inlet and exhaust is governed by a slotted timer which is mounted on the output shaft and rotates at the same speed as the motor.

Variation of performance parameters of the motor is easily achieved by varying the time during which the air is allowed to enter the chamber: A longer air inlet period allows more air to flow into the chamber and therefore results in more torque. A shorter inlet period will limit the air supply and allows the air in the chamber to perform expansion work at a much higher efficiency. In this way compressed air (energy) consumption can be exchanged for higher torque and power output depending on the requirements of the application.

Motor speed and torque are simply controlled by throttling the volume or pressure of air into the motor. The Di Pietro motor gives instant torque at zero RPM and can be precisely controlled to give soft start and acceleration control." ... more

The Superball Engine

Peraves - The SuperBall Engine
KugelMotor

Site of the Inventor
about
The Hüttlin Drive Technology

Innomot AG - The Hüttlin Drive Technology

Reg Technologies Inc

Four Stroke Engine Basics
"The four stroke piston engine was first demonstrated by Karl Otto in 1876, hence it is also known as the Otto cycle. The technically correct term is actually four stroke cycle. The four stroke engine is probably the most common engine type nowadays. It powers almost all cars and trucks. The Radmax/Direct Charge Engine represents a dramatic departure from existing piston engine design that has not changed appreciably in well over 100 years. The four strokes of the cycle are intake, compression, power, and exhaust.

On a piston internal combustion (or reciprocating) engine, each corresponds to one full stroke of the piston, therefore the complete cycle requires two revolutions of the crankshaft to complete.

The RadMax™ Rotary Engine also uses the four stroke principle, however combustion chambers form between the rotor, outer housing walls, and vanes and their volumes change as the vanes move during rotation. Because the RadMax™ design has twelve vanes, the engine generates an incredible twenty-four combustion events (power strokes) per rotation, twelve on the upper side of the rotor and twelve on the lower side of the rotor." ... more

W2 Energy, Inc. can provide the following solutions

Syngas Production: The NT Plasmatron converts any hydrocarbon feedstock into syngas, which is a combination of hydrogen (H2) and Carbon Monoxide (CO). Viable feedstocks include municipal solid waste (MSW), coal, natural gas, tires, sewage, animal waste and agricultural waste.

Electricity Production: The SteamRay high-efficiency rotary engine converts either steam or syngas into electricity. The WaterHelix converts river or offshore water flows into hydraulic pressure. The W2 Small Energy Generating System (SEGS) converts that hydraulic pressure into electricity.

Liquid Fuel Production: The MultiFuel Gas-to-Liquid Reactor converts syngas into either Ultra Low Sulfur Diesel (ULSD) or an approximate 40/35/25 blend of ULSD, gasoline, and JP8 jet fuel. The W2 Butanol Reactor (WBR) converts syngas into an approximate 60/30/10 blend of butanol, acetone and ethanol. Butanol can be used as a gasoline substitute. Acetone and ethanol are commercial products with substantial worldwide demand.

Waste Remediation: W2 Energy technology eliminates the need for landfills and offers the opportunity to convert existing landfills into electricity, liquid fuel, plus sale-able and recoverable industrial byproducts such as landfill ash and powder sulfur.

Carbon Gas and Pollution Sequestration: The SunFilter Algae Reactor sequesters carbon dioxide and other pollution gases and grows algae which feed on those gases and particulates. In situations where the algae feed on pure carbon dioxide (CO2), such as the carbon dioxide produced by the MultiFuel Reactor, the algae can be used to produce biodiesel, syngas, and human and animal food supplements. When feedstock gas has other components such as sulfur oxides, resulting algae can create biodiesel and syngas.

Transportation: The Solar Bug Solar Electric vehicle runs on a combination of conventional and solar-produced electricity, eliminating the need to buy transportation fuels and using solar power as a free and renewable source of energy." ... more

Revetec Holdings Limited

REVETEC is an engine design company and developer of the "Controlled Combustion Engine" (CCE). The CCE is an internal combustion engine that is smaller lighter, cleaner and produces higher torque due to higher mechanical transfer than equivalent conventional engines. It is cheaper to manufacture.

Patented across key markets globally, Revetec's break-through design has a higher bottom-end mechanical advantage over equivalent conventional engine. This in turn increases the overall engine efficiency making the engine significantly more fuel efficient than a conventional engine, with increased power/torque ratios.

The advantages of Revetec's engine technology can be applied to most internal and external combustion engines for use in motor vehicles, trucks, buses, motorcycles, pumps and generators, light aircraft engines, diesel and marine engines.

The engine has an increase in torque which is what drives the vehicle. It follows that the earlier in RPM high torque is achieved, and the longer it is available, the more efficient the engine is - resulting in savings in fuel consumption and fewer emissions. This Patented design increases the mechanical advantage of an engines bottom end from approx. 64% (conventional) to an amazing 87%+. This increases the total thermal efficiency of a conventional engine.

The technology can be applied to most internal and external combustion engines with greater efficiency. Namely, motor cars, trucks, buses, motorcycles, pumps and generators, light aircraft engines and marine engines. The Revetec engine is non fuel specific, and the benefits equally apply to all fuel types such as: Gasoline, Diesel, Ethanol and CNG etc.

The CCE engine is also smaller, lighter and cheap to manufacture. These advantages also mean the CCE design is ideally placed to become a key component in automotive Hybrid Electric Systems." ... more

Bourke Engine
"Russ Bourke devised an engine that would harness the destructive forces of detonation, to produce a smooth flow of power, with minimal loss. Bourke Engines embody attributes of the ideal internal combustion engine.

Bourke was very much misunderstood and ignored.
    - Virtually zero particulate emission
    - more rapid expansion of charge
    - better mechanical advantage
    - 100% dynamic balance
    - leaner mixtures
    - no oxides of nitrogen
    - no mechanical sounds while in operation
    - low exhaust gas temperature
    - clear-clean exhaust
    - low grade fuels only

Bourke Engine exhaust is amazingly cool, clear, and clean.
Bourke engines do not violate thermodynamic laws, rather, use them to full advantage. Bourke-type engines can be muffled to a "low hiss". Exhaust channeling will not burn-out.
    - No catalytic converter needed
    - No carbon monoxide
    - No frequent oil changes
    - No special tools
    - No valve adjustments
    - No pollution devices and No smoke

Lean mixture (excess air), 18/1 compression, and LONGER DURATION of COMPRESSION (fixed volume), combine to trigger the MAXIMUM and QUICKEST EXPANSION of the charge (detonation). Conventional rod engines can not tolerate the explosive release of energy (pressure), due to excessive side-loading on piston skirts. Bourke has no piston side-loading. Pistons are always "pushing" to dead center. No tensile forces present. Dr. Diesel would stand in awe of a Bourke 400" ... more

MA Engine Technologies Pty Ltd - Rotary Piston Engine

"Since its invention by Nicolaus Otto in 1861, the internal combustion engine (ICE) has remained large, heavy and inefficient. By adopting a revolutionary new design, the Rotary Piston ICE has changed all that.

Above is the single cylinder, 4 stroke 150 cc demonstrator we built for the patent application. On the "Videos" page you can see how smoothly it runs. Although the engine is only attached to a cantilever type support, there is hardly any vibration or oscillation -- something usually unheard of in a single cylinder engine.

Since our Rotary Piston engine has high torque and is already running at an ideal RPM, it can have a direct drive without any transmission. The engine is dynamically air cooled, which removes the need for a bulky liquid cooling system.

To testify to its performance, low weight and small footprint, compare our new 4 stroke 250 cc Rotary Piston engine with an ordinary generator currently on the market. Both have the same 10 kW output.

Such an advanced generator solution will prove attractive as a high-performance lightweight Range Extender in tomorrow's hybrid vehicles, as a Auxiliary Power Unit (APU) for the trucking industry worldwide, and in any other application were electric energy is immediately needed.

The Rotary Piston Engine has an extremely low vibration level, as well as high torque at the RPM level used by an aircraft propeller. These superior features inherent in the design make it the best candidate for drones or Unmanned Aerial Vehicle (UAV) applications. Small size and light weight also mean more payload or fuel can be carried for greater range." (1000cc 20.9 Kg Horsepower: 100/110) ... more

"Established in early 2008, EcoMotors is quickly achieving critical mass in terms of changing the landscape of internal combustion power. EcoMotors is developing high-efficiency engines - specifically the unique opoc™ (Opposed Piston Opposed Cylinder) engine - for use in cars, light trucks, marine applications, agricultural vehicles, stationary generators, etc.; essentially anywhere conventional gas or diesel power is utilized.

EcoMotors International Thecnology

"The internal combustion piston engine has been the primary means of automotive propulsion for more than a century. Today, thousands of engineers around the world are hard at work trying to improve this 19th century invention. Some are striving to make incremental gains; some are hoping for a breakthrough. For all of them, one measuring stick is the "acid test" for any engine: power density. Why is this so important? Because, if you achieve greater power density, a range of critically important attributes will result, including:

    - Lower weight
    - Smaller size
    - Lower material costs
    - Lower friction
    - Greater fuel efficiency
    - Lower emissions
    - Lower heat rejection

This is why, at EcoMotors International, power density is our Holy Grail. Our first product targeted for commercial application is a turbo-diesel version of the innovative opposed-piston, opposed-cylinder engine. The opoc™ engine is based on an old idea, but its architecture and unprecedented power density make it new and unique. How well does the opoc™ engine do in terms of power density? This chart shows 75 years of incremental gains in diesel engine specific output. And here is what the diesel opoc™ engine achieves.

For a given power level, the opoc™ engine is 30-percent lighter, one-quarter the size, and achieves 50-percent better fuel economy compared with a state-of-the-art, conventional turbo-diesel engine. Because of this breakthrough, we are enthusiastic about the internal combustion engine's future. It's a breakthrough based on the strength of extraordinary power density." ... more

Turbine Truck Engines, Inc.

"Turbine Truck Engines, Inc. (TTE) is an American technology company focused on continuing development, manufacture, and world-wide distribution of its energy efficient and environmentally-friendly products.

Turbine Truck Engines' mission is to provide the trucking industry with a revolutionary new energy efficient engine technology that delivers the fuel savings necessary to conduct profitable operations, while, at the same time, significantly improving the health of our planet by reducing the exhaust gas emissions which contribute to global warming.

Detonation Gas Cycle Turbine engine
The DCGT is powered by an innovative new electromagnetic isothermal combustion process that produces complete combustion of fuel-oxidizer mixtures in cyclic detonations.

The high-pressure gasses produced by these detonations drive a unique turbine producing shaft horsepower. The engine's unique combustion process allows the DCGT to operate with blower air at low static pressure, negating the necessity of compressing and preheating fuel-oxidizer mixtures prior to combustion. Once the compression of fuel-oxidizer mixtures has been eliminated, the engine both achieves higher thermal efficiency in a simplified mechanical structure, and provides significant advantages over current diesel, gasoline, and gas turbine engines." ... more

Micro-Combustion, Inc.

"The Cavitation-Ignition Bubble Combustion (CIBC) engine is a new discovery in green energy technology that holds the potential to replace fossil fuel altogether.

For the past thirteen years, a small research company, Micro-Combustion, Inc., following up on the experimentation done by Mr. Ray for many years prior to that, has dedicated itself to the development of a new engine prototype based on the physics of cavitation-ignition bubble combustion.

The basic idea behind this new engine is simple but revolutionary: it utilizes a small air bubble in a fluid (the fuel) as the combustion chamber to compress, ignite, and capture the energy (heat) released by the combustion of the fuel-air contents of the bubble.

The fuel also happens to be the working fluid, which drives the turbine blades to extract power. The CIBC engine can run on just about any liquid hydrocarbon fuel, including plant, mineral, or recycled oils.

Although the CIBC engine can operate on petroleum-based fuels, they are not required. Its ability to operate on alternative liquid fuels holds the potential, if fully realized, to transform the transportation sector by reducing or eliminating our nation's reliance on domestic or imported petroleum-based fuels. The physics and chemistry of the CIBC engine have been tested by NASA scientists who, in a report dated August 2005, found that the CIBC concept is indeed real and potentially capable of producing power." ... more

Pempek Systems - Free Piston Power Pack

"The FP3 is a most efficient, low cost, elegant electric generator module of exceptional power density. Operation is based on 'free pistons' (unrestrained by con-rods or crank shaft) being driven back and forth inside cylinders by controlled internal combustion. Permanent magnets are attached to these pistons and move through stator coils, thus generating electric power.

Compression ratio and stroke, as well as exhaust valve timing and lift, are software controlled rather than through conventional mechanical means. The result is mechanical simplicity, unequalled efficiency and extremely low harmful emissions.

Salient features of a 100kW FP3 module:
    - Size: 660x280x280mm - Mass: 100kg - Power Density: 1kW/kg; 2 kW/litre
    - Two-stroke operation
    - Integral charge compressor
    - Fuelled by Gasoline, Diesel (Bio, JP8), LPG, Ethanol, Hydrogen, etc.
    - Direct, high pressure fuel injection - Variable exhaust valve lift and timing - Variable compression ratio and stroke
    - Mechanical simplicity (software 'replaces' conventional con-rods, cam and crankshaft)
    - Readily scalable from 25 to 500kW output power
    - Efficiency 50%

The exceptional power density of the FP3 makes it possible to construct a Series Hybrid Electric Motor Vehicle capable of regenerating, storing and subsequently re-using the kinetic energy, presently wasted, when slowing down and braking. This is achieved without any compromise in vehicle mass, performance, handling and payload capacity. The up-shot is a substantial reduction in fuel consumption and harmful emissions.

Hybrid Electric Motor Vehicle, weight 1300kg: Fuel consumption (in accordance with NEDC): City= 2.4ltr/100km; Highway= 3.6ltr/100km" ... more

The Cyclone Engine

"The Cyclone Engine is a Rankine Cycle heat regenerative external combustion engine, otherwise known as a 'Schoell Cycle' engine. It creates mechanical energy by heating and cooling water in a closed-loop, piston-based engine system. The process looks like this:

HEAT PROCESS
  1 Fuel is atomized and injected into the patented centrifugal combustion chamber (shown as lifted off the engine block for better viewing), where a spark ignites the fuel-air mixture into a flame that spins around the heat coils. Thermocouples (not pictured) control the duration of combustion to keep the heat in the combustion chamber at a constant temperature.
  2 Water contained in the coils becomes super-heated steam (up to 1200°F) in as little as 5 seconds from start up which is (a) piped to the cylinders, (b) where it enters through a patent-pending valve system (not pictured). Note, valve timing mechanisms regulate how much steam enters the cylinders - the longer the cut-off the greater the torque and acceleration.

MECHANICAL PROCESS
Steam enters the six radial-configured cylinders under pressures up to 3200 psi to push the pistons down in sequence. Note, no motor oil is used - water is both the working fluid and engine lubricant. Also, because of the valve design, the engine starts without the need of a starter motor." more

"The gear oscillator is an innovative concept that uses a set of non-circular gear wheels instead of a crankshaft and connecting rods to achieve the oscillating motion of a set of pistons.

This results in torque-only crankless reciprocating compressors and engines and enables the use of oil-free cylinders.

How does it work?
In its simplest form, three pairs of external non-circular gears rotate in mesh with two identical non-circular internal gears, in a way that resembles that of two epicyclic gear trains. That's why the internal gears are called ring gears (RG) and the external gears are called planet gears (PG), although there is no sun gear in the present arrangement.

Each pair of planet gears rotates in unison and keeps a fixed relative position with respect to the other pairs by means of a planet carrier (PC). One ring gear is fixed to the stator and the other one is fixed to the rotor. As the planet carrier rotates, it forces in turn the planet gears to rotate in mesh with the ring gears and produces their relative motion.

Although the gear oscillator substitutes for the crankshaft, it works in quite a different way. In fact, the operation of this mechanism resembles much more that of a set of pulleys.

Power density
It's already apparent that the gear oscillator allows to pack a large number of cylinders in a small space. In part this is due to the double acting pistons, that take up a little more room than a single cylinder to allocate two. On this account only, it already has a high power density. Only the old radial engines with their contrived connecting rods approached this cylinder density. And we can even put in more cylinders if we build more than one "donut", or we can dispose the cylinders in a more compact manner if we offset them or attach the pistons directly to the rotor. In the end it seems that the limiting factor will be the gear drive capacity, and in this respect, the robustness of planetary gear sets is well known.

But there's a second reason why using a bigger number of small cylinders as opposed to a smaller number of big cylinders may contribute to increase power density. As the late MIT Professor C. F. Taylor wrote:"It is apparent that the use of small cylinders is a very powerful method of reducing size and weight for a given output (...). In practice, this relationship has not always been fully appreciated (...)". To say the truth, this relationship is not so apparent. The key to understand it is mean piston speed." ... more

Sanderson Engine Development

"Sanderson Engine Development is a small, highly focused organization that has pioneered a unique new rocker-arm power conversion mechanism called S-RAM (for Sanderson Rocker Arm Mechanism). This mechanical innovation can be thought of as an entirely new "core technology" that will enable imaginative repackaging and redesign of many of the internal combustion engines, pumps, compressors, and hydraulic motors with which you are already familiar.

The S-RAM is a recent invention that uses a new principle to convert reciprocating to rotating motion, producing equally high efficiency in both directions. The application of the S-RAM to engines, fluid pump/motors, and air compressor/motors, through actual prototype testing, has demonstrated the substantial advantages of this low-friction device.

The Sanderson mechanism represents a major paradigm shift in applications of all types and sizes that require conversion of linear to rotary motion, or vice versa.
Using a unique, patented rocker arm solution to transfer linear thrust to rotary motion, it applies to any device currently using a crankshaft, bent axis, swash plate, or wobble plate.

Because the design advantages also apply to conversion of rotary to linear motion, the mechanism applies equally to pumps, compressors, electric generators, electric motors, and hydraulic systems as well as engines.

Description of the S-RAM

The S-RAM is a recent invention that uses a new principle to convert reciprocating to rotating motion, producing equally high efficiency in both directions. The application of the S-RAM to engines, fluid pump/motors, and air compressor/motors, through actual prototype testing, has demonstrated the substantial advantages of this low-friction device.

Low friction in hydraulic devices leads to high overall system efficiency, low heat generation, and virtually zero slip-stick." ... more

The LiquidPiston engine

"The LiquidPiston engine is based on a patent-pending thermodynamic cycle, called the "High-Efficiency Hybrid Cycle" (HEHC), which borrows elements from Otto, Diesel, Atkinson, and Rankine cycles. Several critical design features make the LiquidPiston engine architecture both versatile and capable of outperforming conventional engines on all parameters.

LPI’s engine is architected to have the following unique properties:
    - High fuel efficiency of 57% at peak, and 50% at part-load
    - High power density of 1 Hp / Lb
    - Simple design with low part count
    - Multi-fuel capable: diesel, JP8, gasoline, natural gas, bio-fuels
    - Low noise: the engine has low pressure exhaust and no poppet valves

The conventional internal combustion engine typically only converts ~ 30% of the energy in the fuel to mechanical work. For applications where engine loads vary, the efficiency can drop to as low as 1% efficiency (during idling, for example), and automotive engines are only 15% efficient over typical driving conditions. In the best case, ~30% of the chemical energy of fuel is converted into useful work; ~40% is removed as heat by cooling, and another 30% is lost with exhaust gases.

There are several different types of engines in operation today, and each has its own advantages. The High Efficiency Hybrid Cycle engine is able to combine the benefits of these existing and proven technologies." more

The NEVIS(New Exhaust Valve & Intake System) engine

"The NEVIS (New Exhaust Valve & Intake System) engine is an innovative Internal Combustion Engine (ICE) that within a single patented engine design is estimated to nearly double the fuel efficiency attained by conventional ICE technologies. Additionally, its modular cylinder construction (e.g. 2, 4, 6 or 8 cylinder engines from a one-cylinder block) offers opportunities to enhance manufacturing efficiency while allowing a single facility to produce a wide range of engine sizes for varying power needs suited for diverse applications (automotive, aeronautic and marine). Its versatile design means it can be configured to be fuelled not only by gasoline but also by diesel, hydrogen and bio-fuels.

The "Bortone Cycle" and the Nevis Engine
The thermodynamic cycle or rather the manner in which the internal combustion process takes place within most of today's conventional ICEs dates back over 100 years

Cesare Bortone's outside-the-box approach was to conceive a new cycle for maximum efficiency, which we have termed the "Bortone Cycle," and design an engine that could make this new cycle work. The NEVIS engine, constructed using conventional methods and materials, singularly addresses a variety of strategies for enhancing efficiency:
    - Engine weight and size are reduced with its doughnut-shaped piston but power is increased for the same cylinder displacement, in part, due to an innovative use of the energy of the engine's exhaust vacuum and to the factthat the engine has 6 times the number of power strokes per revolution than a traditional four-stroke engine
    - Optimum combustion occurs at all power levels with the engine's variable combustion ratio and variable valve timing/duration" ... more