METHOD OF AND FLOWMETER FOR DETERMINING FLOW RATE OF CRANKCASE GASES IN INTERNAL COMBUSTION ENGINE Russian patent published in 2005 - IPC

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention are designed for revealing condition of cylinder-piston group of internal combustion engine by flow rate of gases blowing by from combustion chamber into crankcase through ring seals of pistons. On Warmed up engine oil filler neck of crankcase is opened, and after sealing of crankcase space, housing of flowmeter is fitted on neck. Restrictor is fitted in gas channel of said housing. For each specific type of engine used as restrictor is each of two replaceable diaphragms with different areas of cross sections, smallest one being chosen to conform to preset condition. With engine attaining preset steady operating conditions, flow rate of crankcase gases is determined by pressure drop on restrictor and area of cross section of restrictor by measuring two times of one of said parameters at two preset values of other parameter using dependence given in description of invention.

EFFECT: provision of accurate and reliable measurement of flow rate at reduction of labor input.

7 cl, 1 dwg