[Gasification] Benefits of boosting compression ratiowith producer gas

[Arnt Karlsen]

On Tue, 1 Mar 2011 09:18:40 -0800, Luke wrote in message 
<618E6C3110344D6D917FA8DB0B615E53 at santashelper>:

> All,
> Valve timing gains are  most realised with high rpm engines.  to make
> the discussion short and sweet,  great gains in volumetric
> effieciency can be reachieved for a naturally aspirated engine with
> proper valve timing"overlap" at specific target rpms. 


..um, Gengas speaks of "105% diesel power" on 3-digit rpms 
on wood gas, using "pulsator" piping on a 2-stroke freight 
boat engine.  
Inertial supercharging also works on 4-strokers. ;o)

> If set up
> properly the exhaust valve remains open well after the intake valve
> begins opening while passing tdc.  this will allow some pre filling
> of intake air before the piston even starts going down, as the
> inertia of the exiting exhaust gas leaves a "hollow" or a momentary
> low pressure behind its exit. 

..inertia is is handy to control gas flows and compression pressures,
e.g. at idle, we want low compression, so just let the gas blow back 
out.  Feeding the grid, we want high compression, so just slam shut 
the trap doors behind our prey, the gas mix. ;o)


-- 
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.