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US 4,538,454 AGranted
Method for discriminating motor/combustion pressures in an I.C.E. combustion chamber
AssigneeNissan Motor Co., Ltd.
InventorShigeo Aono
Life of this patent
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AssigneeNissan Motor Co., Ltd.
InventorShigeo Aono
Estimating the term…
In order to determine the exact nature of the combustion process occuring within the combustion chamber of an internal combustion engine, the timing is retarded to the point where no combustion pressure is produced during the compression stroke of the piston. This allows the compilation of the pressure history of the first half of the motoring pressure wave produced by the movement of the piston, the subsequent mathematical derivation of the essentially symmetrical second half of the wave and the determination of the exact nature of the combustion pressure generation. This of course facilitates combustion process control via indicating the effects of exhaust gas recirculation, ignition timing, air fuel ratio and the like, on the combustion time, heat generation and peak combustion pressure of the combustion phenomenon.
In an internal combustion engine having a piston movably disposed in a combustion chamber and arranged to perform a compression stroke and a subsequent expansion stroke, a method of determining the motoring pressure characteristics in the combustion chamber due to the movement of said piston in the presence of combustion therein comprising the steps of:
In an internal combustion engine having a piston operatively connected with a crank shaft and movably disposed in a cylinder to define a combustion chamber, said piston being arranged to perform a compression stroke and a subsequent expansion stroke, an apparatus for determining the motoring pressure characteristics in the combustion chamber due to the movement of said piston in the presence of combustion therein comprising:
Dependencies are inferred from the claim text.