Mechanical fatigue test bench for engine cylinder heads

Details Mechanical fatigue test bench for engine cylinder heads Mechanical fatigue test bench for engine cylinder heads

1990-08-28

1991-10-08

Myracle, Jerry W.

Measuring and testing

Simulating operating condition

Marine

G01M 1900

Patent

active

050543148

ABSTRACT:
This invention relates to a fatigue test bench for engine cylinder heads, particularly for motor vehicles. This bench comprises as main elements: a device for fixing the test cylinder head on an intermediate connecting member, connecting it to the means of establishing hydraulic pressure in the combustion chambers and in the circulating of the heat bearing fluids; a pressure generating device which simulates as faithfully as possible and in a reproducible manner the pressure cycle as a function of time in the combustion chambers; and a system of circulating heat bearing fluids through the water chambers of the cylinder head with two differnt circuits, one at ambient temperature and the other at a higher temperature used alternately by means of a regulable timing device which controls the operation of one or other of the circuits. The apparatus according to the invention makes it possible in a limited time, generally less than half the time required for tests on an engine bench: for a given type of cylinder head, to define the most suitable alloy or alloys; to develop new alloy compositions which are more suitable for the increasingly more severe demands encountered in the field of motor vehicle cylinder heads; to rapidly test new forms of cylinder heads; and to draw up comparative data of resistance to mechanical fatigue.

REFERENCES:
patent: 3690162 (1972-09-01), Stecher

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