Seattle Smitty,
Regarding the rotary valves:
The controlled timing of the rotary valves is simple, it takes only a phaser between the crankshaft and the rotary valves “shaftâ€.
The control of the duration is another story. The insertion of a sleeve between the rotary valve and the cylinder opening adds another passage for the gas to escape. If the sealing quality is already critical, the additional sleeve cannot work. Coates knows the rotary valves and their problems, so he could say.
You are thinking about the Variable Valve Actuation system. The Pattakon VVA is on the roads for a long time now. The prototype cars are used as ordinary cars every day.
So instead of thinking about the Pattakon VVA, make me a favor and think about the Pattakon PRE engine.
Look the animations at
www.pattakon.com/pre/index.html . Take a careful look at the plots: the PRE engine offers some 30 to 40% more time near TDC for efficient combustion.
Spot on the Junkers-PRE version at
www.pattakon.com/pre/PRE14.exe , used as the prime mover for an electric power plant at
www.pattakon.com/pre/PRE16.exe and on a portable flying machine at
www.pattakon.com/fly/Flyer1.exe
When you get the chance, take a look at the Pattakon’s US patent 6,062,187 (regarding the PPE or Pulling Piston Engine which is the father of Pattakon PRE or Pulling Rod Engine) and then at the four year later HONDA’s endeavour on the same exactly problem with the US patents 6,763,796 and 6,786,189 (at http://www.uspto.gov/patft/index.html ). Spot on the complication of each solution.
Honda’s patents start with “In order to increase thermal efficiency by increasing the constant volume portion of combustion, it is proposed . . . “
A single cylinder Junkers-PRE Diesel engine with a pair of counter rotating electric generators is the ideal power plant for Hybrid cars because:
It is absolutely vibration free (there are neither inertia nor combustion vibrations from the engine to the vehicle), it is autarkic having built-in scavenging pumps, it has top thermal efficiency (due to the slow motion of pistons near TDC), top power concentration (as a Diesel it can rev efficiently at 6000 rpm), it has four stroke like lubrication, it is simple, it uses only conventional materials etc.
Do you know a Diesel revving efficiently at 6000 rpm?
Compare the PRE engine to anything you know. For instance, to the OPOC FEV engine. And let me know.
The blueprints for a PRE prototype are ready.
A PRE prototype is necessary in order to check the theory in practice (exactly as happens in the case of the Pattakon VVA).
In the meantime do make your objections and comments.
Thanks
Manolis Pattakos
