Total ventilating and scavenging system for an internal combustion engine

Claim 2

The combination with an internal combustion engine having a carburetor for feeding and metering a combustible mixture to the engine cylinders and a cover enclosing the rocker arms that actuate the intake and exhaust valves; a. a first sole air feeding means for said carburetor and including a conduit communicating with the top interior of said cover and with said carburetor; b. a second sole atmospheric air feeding means for delivering air to the interior of the engine adjacent to one end of the engine crankcase, said engine having passages leading from the crankcase to the interior of said cover so that the air passing through the crankcase will pick up any gaseous vapors therein for scavenging the crankcase; c. a baffle spaced below the top interior of said cover and disposed above the rocker arms, the plane of said baffle being downwardly inclined from a horizontal plane and extending from one side wall of said cover and having a lip forming a trough, spaced a measured distance from the other side wall so as to provide a space between the trough and the wall of less area than the space between said baffle and the top of said cover, whereby tHe air and any gaseous vapor carried therewith will be caused to pass more rapidly through the space between the trough and the adjacent wall and will slow down immediately upon entering the larger space above the baffle so that the slowing down of the air with its vapors will cause the heavier vapors to precipitate out from the air and drop onto said baffle, the remaining lighter vapors in the air being conveyed by said first conduit to the carburetor, this conduit being the only source of air and any vapor supply to the carburetor.

Claim 3

The combination as set forth in claim 1 and in which a. the trough for the baffle has its central portion at a higher elevation than the trough ends so that the condensation from the vapor in the trough will flow by gravity to the ends of the trough; and b. the trough ends being spaced from the adjacent ends of the valve cover for permitting the condensation to return to the interior of the engine.

Claim 4

The combination as set forth in claim 1: and in which a. the internal combustion engine is of the V-type with two banks of cylinders and pistons with a cover enclosing each set of rocker arms that cooperate with intake and exhaust valves for each bank of cylinders; b. the first sole air feeding means for said carburetor having a conduit communicating with each of the ends of the top interior of each cover and with said carburetor; c. the engine passages that lead from the crankcase to the interior of the cover communicating with the interiors of both covers; and d. there being a baffle spaced below the top interior of each cover and disposed above the rocker arms enclosed by each cover, the planes of both baffles extending downwardly from a horizontal plane and extending from the higher side wall of the cover and having a trough spaced a measured distance from the other side wall so as to provide a restricted space between the upper lip of the trough of each baffle and its adjacent side wall of less area than the space between each baffle and the top of the cover enclosing the baffle, whereby the air and any gaseous vapor carried therewith and picked up by the air flowing through the crankcase and along the passages to the covers, will pass more rapidly through the said restricted spaces and then suddenly more slowly as the air with its vapor enters the larger spaces provided between the baffles and the tops of their covers; c. whereby the slowing down of the air with its lighter vapors will cause the heavier vapors to precipitate out from the air and drop upon the baffles, the remaining air with its vapors being conveyed by said first conduits to the carburetor, these conduits being the only source of air and vapor supply to the carburetor.

Claim 5

The combination as set forth in claim 2: and in which a. the conduits extending from said covers to said carburetor have an oil/air filter forming a part of the passage between the conduits and carburetor, said oil/air filter separating any oil from the vapor laden air and returning this oil to the engine interior; and b. said second sole atmospheric air feeding means for delivering air to the interior of the engine including an air filter for filtering the atmospheric air entering the engine interior.