Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1984-01-25
1985-07-30
Myracle, Jerry W.
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73115, G01M 1500
Patent
active
045313997
ABSTRACT:
The present invention features a method of calibrating a pressure sensor disposed in an internal combustion engine which is characterized by delaying the ignition until combustion pressure is not generated during the compression stroke, recording the pressure history and mathematically deriving the essentially symmetrical half of the motoring pressure wave which occurs within the combustion chamber during the expansion stroke thereby obtaining the total motoring pressure history irrespective of the generation of combustion pressure. This data permits the output of the pressure sensor to be frequently compared with predetermined motoring pressure values for the same amount of inducted air and thus the value assigned to the output of the sensor to be adjusted to allow for the physical changes which occur within the sensor with temperature and age.
REFERENCES:
patent: 4403505 (1983-09-01), Hattori et al.
Myracle Jerry W.
Nissan Motor Co,. Ltd.
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