Sensing and control methods and apparatus for common rail inject

Details Sensing and control methods and apparatus for common rail inject Sensing and control methods and apparatus for common rail inject

1998-04-23

1999-04-06

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Processes

Of fuel injection

239 75, 239124, 2395338, F02D 106, A62C 3700, B05B 900

Patent

active

058906533

ABSTRACT:
A fuel injector employs at least one sensing device for sensing changes in the thermodynamic properties of the fuel within the injector to thereby monitor injector performance during usage. In some embodiments, advantageously placed temperature sensors are employed to detect the release of thermal energy which occurs when the potential energy of a fuel at high-pressure is suddenly converted into kinetic energy by lowering the pressure of the fuel. Other embodiments of the instant invention employ advantageously placed pressure sensors to detect sudden changes in fuel pressure which occur during the course of the injection cycle. Whereas the sensing devices of the instant invention can be placed at a variety of locations, they are preferably placed to detect changes in the thermodynamic properties of the fuel flowing within an injector where such changes are appreciably large during injector usage. Preferably, injectors of the instant invention are compatible with microprocessor-based fuel-injection control systems to maintain near-ideal injector performance.

REFERENCES:
patent: 4404944 (1983-09-01), Yamazaki et al.
patent: 4438496 (1984-03-01), Ohie
patent: 4475507 (1984-10-01), Miyaki et al.
patent: 5103792 (1992-04-01), Winkler et al.
patent: 5485822 (1996-01-01), Hirose et al.
patent: 5697338 (1997-12-01), Hirose et al.

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