On Tue, 1 Mar 2011 09:18:40 -0800, Luke wrote in message <618E6C3110344D6D917FA8DB0B615E53@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. _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
