Internal combustion engine system for diverting crankcase blowby gases to intake manifold

Claim 1

IN AN INTERNAL COMBUSTION ENGINE HAVING A CRANKCASE WITH AN OIL FILLER TUBE EXTENDING THEREFROM AND HAVING AN INTAKE MANIFOLD, THE COMBINATION WITH SAID ENGINE OF A CRANKCASE VENTILATING SYSTEM COMPRISING BY-PASS CONDUIT MEANS FROM THE CRANKCASE TO THE INTAKE MANIFOLD, THE INTAKE MANIFOLD HAVING A VACUUM CONDITION THEREIN CAUSING BLOWBY GASES TO FLOW FROM THE CRANKCASE TO THE INTAKE MANIFOLD, VALVE MEANS IN SAID BY-PASS CONDUIT MEANS, SAID VALVE MEANS MODULATING THE PASSAGE OF GASES FROM THE CRANKCASE TO THE INTAKE MANIFOLD, SAID VALVE MEANS BEING RESPONSIVE TO INTAKE MANIFOLD VACUUM FOR INCREASED RESTRICTION OF SAID CONDUIT MEANS UPON INCREASED INTAKE MANIFOLD VACUUM AND BEING RESPONSIVE TO THE FLOW OF BLOWBY GASES INTO THE CRANKCASE FOR DECREASED RESTRICTION OF SAID CONDUIT MEANS UPON INCREASED BLOWBY GAS VOLUME, SEALING MEANS ASSOCIATED WITH THE CRANKCASE FOR LIMITING COMMUNICATION BETWEEN THE CRANKCASE AND THE ATMOSPHERE TO COMMUNICATION THROUGH THE OIL FILLER TUBE, AND AN OIL FILLER CAP REMOVABLY ENGAGED OVER THE OPEN END OF SAID OIL FILLER TUBE AND HAVING AN ORIFICE THEREIN ADMITTING A RESTRICTED FLOW OF ATMOSPHERIC AIR INTO THE CRANKCASE THROUGH THE OIL FILLER TUBE, SAID ORIFICE RESTRICTING THE FLOW OF AIR INTO THE CRANKCASE SUFFICIENTLY TO ALLOW THE INTAKE MANIFOLD VACUUM TO ESTABLISH A SLIGHT VACUUM CONDITION IN THE CRANKCASE THROUGH SAID BY-PASS CONDUIT MEANS, AND RESTRICTING THE FLOW OF AIR INTO THE CRANKCASE SUFFICIENTLY SO THAT THIS FLOW OF AIR WILL NOT