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:
May. 08, 2001
Filed:
Jun. 02, 1999
Kouichi Nishimoto, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A cylinder identification apparatus for an internal combustion engine is able to inhibit erroneous operations caused by noise. The cylinder identification apparatus includes a crank angle sensor for detecting a rotational position of a crankshaft of the internal combustion engine having a plurality of cylinders, a cylinder identifier for identifying the respective cylinders based on a signal output from the crank angle sensor, an engine controller for controlling the internal combustion engine based on the result of cylinder identification carried out by the cylinder identifier, and a noise determiner for determining, before operational processing is implemented based on a particular angle signal, whether the particular angle signal among output signals from the crank angle sensor includes noise so that it inhibits subsequent operation processing if there is noise included in the particular angle signal. When the noise determiner receives a present particular angle signal, it effects noise determination on all angle signals from the last particular angle signal to the present particular angle signal at the same time, and it also compares the present angle signal cycle with the last normal angle signal cycle whenever it effects noise determination.