Inventor:     Tony Deye  (RPC engines,  Linton, Cambridge)


The problem:  


The conventional piston and crank arrangement for positive displacement compression and expsansion is unbalanced and due to its geometry and mechanical features is less efficient than it could be.


The solution: 


Three pockets and two lobes of the two rotors on parallel shafts rotating leave a space between them which reduces to nothing within a third of the turn of the shafts. If gas is allowed into the space when it is at its largest, it will leave the space compressed just before it is closed.  The compression ratio depends on the quantity of gas admitted, which is governed by a wedge shaped slider control valve. Conversely, if the gas is introduced under high pressure just after the gap opens between the lobe and the pocket, it expands and turns the shafts which are connected by gear-wheels. Combining the two functions by placing a fuel combustion chamber between the outlet of the compressor and the inlet of the expander, we have a  purely rotary and positive displacement engine.


Present status:


Well protected by numerous patents and it is being developed in the inventor’s laboratory, where visitors are welcome.  The application of the compressor to diesel engines currently in use reduces their fuel consumption significantly.


Enquiries to 


Jankó and Associates     telephone:  +44 (0)1634 402 552

Rochester,                       e.mail:

ME1  1JD42 Love Lane                

United Kingdom