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Technology Stocks : Advanced Engine Technologies (AENG) -- Ignore unavailable to you. Want to Upgrade?

To: Phil(bullrider) who wrote (3267)	8/31/1999 6:09:00 PM
From: cornbread	Read Replies (1) \| Respond to of 3383

Below, Steve Manthey (the inventor of the OX2 engine) answers some commonly asked questions regarding the OX2 engine. This is being reprinted from the "What's New" section of AENG's web site at: www.oxtwo.com 1.Question: How do you get a leverage advantage of 6.6 times that of a conventional engine? Answer: The leverage advantage of 6.6 times that of a conventional engine was a statement made relating directly to a previous proto-type that was being demonstrated at that time. It relates directly to the leverage applied on the drive shaft, relative to a given stroke. The stroke in the proto-type at that time was 30mm. Ordinarily enabling a maximum leverage on the drive shaft of 15mm. However because the OX2 engine is driving on a cam of 100 mm radius, this is 6.6 times the 15mm ordinarily achievable. (It should be noted that an infinite number of stroke to cam radius and piston diameter scenarios could be run.) 2.Question: Is there a natural limitation of the BHP from a limitation in RPM? Answer: The RPM's of the engine are dependent upon size and application. As for acceptable output shaft RPM, outboard engines typically max at 6000 RPM, run a 2 to 1 reduction to the propeller equaling 3000 RPM. Therefore in this application an acceptable output shaft speed could be 3000 RPM. Likewise a rear or front wheel of an automobile spins at a little over 1000 RPM at 100 km p/h. Therefore a higher output shaft speed is not necessary. The reason for a high RPM being achieved from a crankshaft engine is to give a better horsepower number, whereas the torque an engine can develop at a particular RPM does the actual work. 3.Question: What are the advantages of low RPM? Answer: The OX2 develops very high torque at reasonably low RPM's thusly reducing wear and enabling better control of the combustion process thereby resulting in better economy and emissions. 4.Question: How is it sealed? Answer: Sealing is achieved via a specially designed full floating port seal positioned in the outer most end of the combustion chamber port, presently this seal measures 28mm in diameter and is 3mm thick. It is designed to float and allow for any distortion in the port plate throughout the operating temperature range. The seal is of such design that as alternating pressures are applied; these are neutralized, thereby minimizing friction and wear characteristics. 5.Question: Is there side loading of the pistons? Answer: There is no side loading of pistons against the cylinder bore, in fact at no time do the pistons contact the cylinder wall. The pistons are part of the piston plates. These are rings that house the cam rollers on their underside, and they house a constant velocity rolling bearing joint on their outer diameter / inner diameter to enable a frictionless transition from reciprocating motion to rotary motion. 6.Question: What about flywheels? Answer: A flywheel is an excellent short-term energy storage device, while a flywheel could be fitted to the OX2 as with any engine: the mass of the rotating block will act as a flywheel. 7.Question: What if a piston stops at top dead center? Answer: As the engine is made up of 3 major moving parts there is also a small number of minor moving parts. These being simple rocker assemblies, which control the piston plates under all situations. (Example: startup, engine braking, etc.) 8.Question: What about hydrogen? Answer: Any combustible gas or fluid that could be run in an internal combustion engine can be run in the OX2. The range of compression ratios that could be run in the OX2 is as infinite as any internal combustion engine. As far as hydrogen fuel goes the OX2 engine with its greatly extended piston dwell time would lend itself more favorably to the use of hydrogen than a crankshaft engine. 9.Question: Is there special materials being used such as ceramics and do you need oil pressure? Answer: The OX2 uses standard and proven engine manufacturing materials such as alloy and steel. At present no ceramics are used. The engine does not have the additions of a water pump or oil pump. However it does use coolant, which is centrifugally circulated by the spinning mass of the engine block. (It could also be air-cooled.) There is a sump to hold oil, as there is no viscosity bearing within the engine, oil pressure is not paramount. However circulation of the oil is via capillary action due to alternating pressures within the casing. 10.Question: Is there a RPM limitation? Answer: As the pistons are part of a ring, the limiting factor relative to RPM would be when the dynamic force exceeds the limits of the material being used. (At normal operating RPM this is not considered a problem.) Limitations on RPM would be dependant upon engine stroke and engine size. (The engine can be easily adapted to suit any application.)