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:
Mar. 14, 1995
Filed:
Oct. 01, 1992
Applicant:
Inventor:
Toshio Ohsawa, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02P / ;
U.S. Cl.
CPC ...
324399 ; 731173 ; 324393 ;
Abstract
In an ion current detecting device for an internal combustion engine, an ion current detecting circuit for detecting an ion current produced when the gas mixture is burnt by spark discharges between the electrodes of a spark plug operates to mask the detection signal of the ion current for predetermined periods of time in the intervals in which noise pulses are produced in association with excitation and unexcitation of ignition coil. Hence, the noise pulses are eliminated from the detection signal, whereby it can be positively determined from the presence or absence of the detection signal whether or not the gas mixture has been burnt.