Controlled Combustion Engine (CCE) is a type of internal combustion engine designed by Brad Howell-Smith in 1995. It uses two counter-rotating cams instead of a crankshaft driving two horizontally opposed pistons [1] while retaining an identical cylinder head assembly to conventional engines. The internal combustion engine is an engine in which the burning of a fuel occurs in a confined space called a combustion chamber. ... 1995 (MCMXCV) was a common year starting on Sunday of the Gregorian calendar. ... Animation showing rotating cams and cam followers producing linear motion. ... Crankshaft, pistons, and flywheel Continental engine marine crankshafts, 1942 For the comic strip about an old, curmudgeonly bus driver, see Crankshaft (comic strip). ...

It is around a quarter the size and weight of a conventional engine of similar output and uses fewer moving components. A four or two stroke cycle can be used and it can run on petrol, diesel, compressed natural gas or ethanol. The four-stroke cycle of an internal combustion engine is the cycle most commonly used for automotive and industrial purposes today (cars and trucks, generators, etc). ... The two-stroke cycle of an internal combustion engine differs from the more common four-stroke cycle by having only two strokes (linear movements of the piston) instead of four, although the same four operations (intake, compression, power, exhaust) still occur. ... Gasoline, as it is known in North America, or petrol, in many Commonwealth countries (sometimes also called motor spirit) is a petroleum-derived liquid mixture consisting primarily of hydrocarbons, used as fuel in internal combustion engines. ... Rudolf Christian Karl Diesel (1858-1913), inventor of the Diesel engine. ... A CNG propelled autorickshaw on the streets of New Delhi, Delhi. ... Ethanol, also known as ethyl alcohol or grain alcohol, is a flammable, colorless, slightly toxic chemical compound with a distinctive perfume-like odor, and is the alcohol found in alcoholic beverages. ...

During the power stroke, maximum mechanical advantage is reached after the piston has moved approximately 5% of its travel from top dead centre (approx. 10° ATDC), which makes better use of the high cylinder pressures at this point in the cycle. In comparison a conventional engine reaches its maximum mechanical advantage after the piston has moved approximately 40% of its travel from top dead centre (approx. 60° ATDC). A side affect of this is a CCE can idle at a much lower RPM. In an independent analysis, torque output was shown to be 2.9 times greater than that of a conventional engine [2]. A power stroke is, in general, the stroke of a cyclic motor which generates force. ... In physics and engineering, mechanical advantage (MA) is the factor by which a mechanism multiplies the force put into it. ... Look up top dead center in Wiktionary, the free dictionary. ... Revolutions per minute (abbreviated rpm, RPM, r/min, or min-1) is a unit of frequency, commonly used to measure rotational speed, in particular in the case of rotation around a fixed axis. ... It has been suggested that this article or section be merged with Moment (physics). ...

Because the piston assembly only moves in one dimension (unlike the case in an engine with connecting rods), contact with the cylinder wall is minimised, which reduces wear and lubrication requirements. The cams create less piston shock, which allows ceramic components to be used. The counter-rotating nature of the cams means that most rotational forces are cancelled, which eliminates the need for a heavy flywheel. The engine can run in either direction if symmetrical lobes are used. piston + connecting rod In a reciprocating piston engine, the connecting rod or con rod connects the piston to the crank or crankshaft. ... In mechanics, a shock is a sudden acceleration or deceleration caused, for example, by impact or explosion. ... Fixed Partial Denture, or Bridge The word ceramic is derived from the Greek word κεραμικός (keramikos). ... Spoked flywheel Simple flywheel in motion. ...

Background

The idea came to Howell-Smith, an automotive engineer residing in Australia, during REM sleep. He designed five different engine layouts with variations on each and established Revolution Engine Technologies Pty Ltd in 1996 with a budget of A$2000. The first working prototype was built by father-in-law Peter Koch in Howell-Smith's garage. Howell-Smith founded a company named Revetec Limited and set up a research and development site in Sydney. The prototype was displayed at the 1996 Sydney International Motor Show which brought public awareness to the design. Work began on a second prototype intended for use in generators and pumps, however interest expressed by the Middle East automotive market shifted focus towards automotive applications. Revetec's business model is to license its technology to engine producers worldwide. Rapid eye movement (REM) is the stage of sleep during which the most vivid (though not all) dreams occur. ... Prototypes or prototypical instances combine the most representative attributes of a category. ... Controlled Combustion Engine (CCE) is a type of internal combustion engine designed by Brad Howell-Smith in 1995. ... The phrase research and development (also R and D or R&D) has a special commercial significance apart from its conventional coupling of scientific research and technological development. ... The Sydney Opera House on Sydney Harbour Sydney (pronounced ) is the most populous city in Australia with a metropolitan area population of over 4. ... The term business model is relatively recent. ...

External links

• Revetec website
• Piston Broker an Autospeed special feature.
• Cams Replace Crank in new Engine Design from Automotive Design & Production.