Measuring and testing – With fluid pressure – Motor part or auxiliary
Patent
1985-10-19
1987-05-26
Levy, Stewart J.
Measuring and testing
With fluid pressure
Motor part or auxiliary
G01M 300
Patent
active
046675078
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION AND PRIOR ART
This invention relates to a method and a device for testing the tightness of an engine which comprises at least one combustion chamber and a cooling system containing a fluid. The tightness mentioned here is the one between the combustion chamber of the engine and the cooling system.
A gas leakage between the combustion chamber of the engine and the cooling system can occur for instance as a result of defects of the cylinder head gasket or rifts and pores in the cylinder head or the engine block. Great leakages are naturally relatively easy to discover. A normal indication of such leakages is that the warm gases which are leaking into the cooling system cause such a heating of the cooling liquid that the cooling system no longer can hold the temperature of the cooling liquid near the motor at the regular low value. Another way of pointing out a leakage is to feed the cylinders with air pressure when the engine is not operating and thereby try to visually recognize indications of leakage. At small leakages as a consequence of relatively small defects of the cylinder head gasket or small rifts in the engine block, no testing procedure that gives a reliable leakage indication is existing at the time. However, it would be very desirable to be able to prove also if small leakages exist so that a repair can be done at an early stage; this will naturally reduce the risk of more grave damages as a result of overheating the engine or water leakage into the cylinder. In activities based on engine tune up of and application of supercharging to used engines it would be specially valuable to get reliable information about the tightness of the engine, because the mentioned proceedings often cause a higher operating pressure in the combustion chambers. Thus, a possible leakage would cause greater problems after these proceedings.
SUMMARY OF THE INVENTION
The object of the invention is to obtain a method and a device, which make it possible to attain an indication also of very small leakages of the kind mentioned above.
In accordance with the invention this object is obtained through the method and device characteristics which are described in the appendant claims.
BRIEF DESCRIPTION OF THE DRAWINGS
With reference to the appended drawing, below follows a specific description of an embodiment according to the invention. In the drawings:
FIG. 1 is a schematic, perspective view of an engine, its cooling system and components which are used according to the invention, and
FIG. 2 is a cross section view illustrating a cap means comprised in the device according to the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In FIG. 1 a conventional combustion engine with an engine block 1 is illustrated. Inside the block there are cylinders with pistons which are movable in the cylinders under the influence of forces generated during the combustion of a fuel. Cooling liquid passages which form a part of a cooling system are arranged in the engine block. The cooling liquid passages in the engine block are through conduits 2 and 3 connected to a cooler or radiator 4. During the operation of the motor the cooling liquid will be pumped around in a cycle through the engine block 1, whereas a part of the liquid passes to the radiator 4 in order to be cooled down there and thereafter returned to the engine block 1.
The invention is based on the principle that the gas leakage from the combustion chamber into the cooling system is measured during the operation of the engine by means of a measuring apparatus 5, such as a manometer which senses pressure, and which is so connected that it communicates with the interior of the cooling system. Thus, the pressure increase which takes place in the cooling system as a result of a possible gas leakage can be detected by the measuring apparatus.
The manometer 5 is connectable to the cooling system by means of a conduit 6. The measuring apparatus 5 or in this case the conduit 6 is provided with a valve 7 which normally is in a closed position but also can be op
REFERENCES:
patent: 2328289 (1943-08-01), Morgan et al.
patent: 2415108 (1947-02-01), Newman
patent: 3255631 (1966-06-01), Franks
patent: 3266297 (1966-08-01), Powers
patent: 3313144 (1967-04-01), Johnson
patent: 3608369 (1971-09-01), Wilkinson
patent: 3650147 (1972-03-01), Moyer
patent: 4059985 (1977-11-01), Kelly
patent: 4102178 (1978-07-01), Mercik, Jr. et al.
patent: 4235100 (1980-11-01), Branchini
patent: 4494402 (1985-01-01), Carney
Levy Stewart J.
Raevis Robert R.
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