The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 1982
Filed:
Nov. 03, 1980
John W Gillespie, Chelsea, MI (US);
Jodon Engineering Associates, Inc., Ann Arbor, MI (US);
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.