Motorheads

[HysteryDiagnosis]

Revetec Engine, theoretically increasing engine efficiency by a rather large amount.

www.Revetec.com

[toddaa]

1. Damn, I thought this was going to be a thread about God

[HysteryDiagnosis]

2. Didn't god invent the whole combustion thing? One could look at it that way. n/t

[HysteryDiagnosis]

3. Coates rotary valve cyllinder head, impressive.

http://www.coatesengine.com/engine_of_the_future.html



Variable valve timing has advantages at lower RPMs as it can shorten the overlap duration of the valves, but has extra moving parts that eventually wear. On quick deceleration, it can cause piston and valve contact where serious damage can occur. Poppet valves, if not activated with hydraulic systems, must have clearance readjusted periodically. The successful poppet valve of the original combustion engine has been used and modified continuously until the present. However, it is the most troublesome part of a combustion engine and has lower efficiency at higher RPMs.
Remedy

The Coates Spherical Rotary Valve Engine is the most advanced in the world, with the most positive valving system ever built. The breathing capabilities of the system are almost double that of a poppet valve. For instance: a static test of a five-litre poppet valve engine on an airflow machine produced a reading of 133 cubic feet per minute (CFM) with valve fully opened. The five-litre Coates Spherical Rotary Valve Engine on the same machine, however, produced a reading of 319 CFMs fully opened; a colossal advantage in airflow comparison. A five-litre poppet vavle engine tested on a dynomometer under the same loads and conditions at 5500 produced 480 BHP and 454 foot pounds of torque.

The maximum RPMs on the poppet valve engine were 5700 RPMs; the Spherical Rotary Valve Engine in comparison reached 14,850 RPM's, The Coates Spherical Rotary Valve comprises two spherical rotary valves assembled on two separate shafts - one for inlet and one for exhaust. They rotate on ceramic carbon bearing with no oil lubrication, the spheres do not make contact with any part of the housing. The seals are a floating type and are also made of a ceramic material. They have two piston rings and are floating in a small cylinder-type chamber, they are activated by the compression and the combustion strokes of the engine which allows 100 percent sealing effectiveness, when compressed.

[Hotler]

4. Kicking! n/t