Patent ID: 6575022
Filing Date: 2003-06-10
Classification: F01M,G01F,G01M

Abstract:
An internal combustion engine, comprising:at least one cylinder; at least one piston slidingly disposed within the at least one cylinder in order to define a combustion chamber above the piston; an air intake system operable to supply air to the combustion chamber; a crankcase coupled to the at least one cylinder, wherein an interior of the crankcase is in fluid communication with an interior of the at least one cylinder below the at least one piston, wherein combustion gases which blow-by the at least one piston may enter the crankcase; a venturi having an inlet port and an outlet port, wherein the inlet port is coupled to the crankcase interior and the outlet port is coupled to the air intake system such that gas within the crankcase may flow through the venturi; a high pressure tap extending from an exterior of the venturi to an interior of the venturi; a low pressure tap extending from the venturi exterior to the venturi interior; and a sensor coupled to the venturi and operative to measure a differential pressure between the high pressure tap and the low pressure tap.