Dual probe coupler
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United States of America Patent
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-
Jul 6, 1982
Grant Date -
N/A
app pub date -
Nov 3, 1980
filing date -
Nov 3, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A probe assembly for injection of microwave energy into the cylinder cavity of a diesel engine and detection of luminescence indicative of fuel ignition in the cylinder. The probe assembly comprises a probe with microwave and optical transmitters extending axially therethrough adapted to be threaded into a cylinder opening. A coupler is removably mounted on the probe and includes an optical detector mounted in assembly coaxially with the optical transmitter in the probe and a microwave antenna coupled by a waveguide cavity within the coupler to the probe microwave transmitter. The coupler is adapted for connection to suitable external diagnostic circuitry for providing to such circuitry signals indicative of piston position within the cylinder and fuel ignition as a function of the microwave and luminescence signals respectively.
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