Measuring and testing – With fluid pressure – Leakage
Patent
1994-12-13
1996-10-29
Chilcot, Richard
Measuring and testing
With fluid pressure
Leakage
73115, G01M 1500
Patent
active
055698417
ABSTRACT:
A leakage tester for identifying defective piston assemblies in a diesel engine includes an adapter fitting for connection to a compression relief valve port on a selected diesel engine cylinder, a fixed length of air conduit having a preselected inside diameter connected at one end to the adapter fitting, and an orifice meter having an air inlet and an air outlet. The orifice meter includes first and second pressure gauges for measuring air inlet pressure and air outlet pressure, respectively, the air conduit having another end connected to the air outlet. In use, the tester is connected to the compression relief valve port and the air inlet of the orifice meter is connected to a source of pressurized air. With the engine advanced to position the piston in the selected cylinder at top dead center, a preselected pressure is applied to the orifice meter. Cylinder leakage is then determined directly from the pressure reading on the second pressure gauge. A pressure regulator coupled between the source of pressurized air and the air inlet on the orifice meter maintains a preselected pressure at the air inlet.
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Hoban Patrick J.
Plaza Michael C.
Chilcot Richard
Dombroske George M.
General Electric Company
Snyder Marvin
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