Measuring apparatus of volume of an injected fluid

Details Measuring apparatus of volume of an injected fluid Measuring apparatus of volume of an injected fluid

1988-05-13

1989-08-22

Levy, Stewart J.

Measuring and testing

Internal combustion engine or related engine system or...

Compression

G01M 1500

Patent

active

048584665

ABSTRACT:
A measuring apparatus of a volume of a fluid injected from an injection valve. A fluid having a volume V is injected from an injection valve into an injection chamber containing a fluid, same kind as that of the injected fluid, and having a predetermined pressure and volume. A back pressure chamber is formed separately in the injection chamber with a parting plate having an effective under-pressure area A and a bellow sealed and connected, at one end thereof, to the parting plate. In the back pressure chamber a non-contact displacement sensor having a thermal compensation device is disposed with a clearance from the parting plate and the bellow and the back pressure chamber is filled with another fluid having same pressure as that of fluid in the injection chamber. By the injection of the fluid into the injection chamber, the parting plate moves toward the non-contact displacement sensor by a distance S which is equal to V/A. Distance S is detected by the non-contact displacement sensor. So the volume (V=AxS) of the fluid injected from the injection valve is measured easily and precisely without being affected by temperature variation.

REFERENCES:
patent: 3234785 (1966-02-01), Rimsha
patent: 3371272 (1968-02-01), Stanton
patent: 4212200 (1980-07-01), Rousseau et al.
patent: 4391133 (1983-07-01), Ito
patent: 4461169 (1984-07-01), Augustin
patent: 4546648 (1985-10-01), Abt

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