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:
Sep. 13, 1994
Filed:
Jun. 29, 1993
Wataru Fukui, Himeji, JP;
Noriaki Hayashi, Himeji, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An apparatus for controlling operation of an internal combustion engine including a multiplicity of cylinders. The apparatus comprises a control means for detecting speedily reference positions for control of the individual cylinders with high reliability. In the control means, a reference position signal generating means for generating a reference position signal containing six equiinterval rectangular pulses each having a duty cycle of 1/2 during a single rotation of a crank shaft is provided in combination with a cylinder identification signal generating means for generating a plurality of different-interval rectangular pulses during a rotation of a shaft interlocked to the cam shaft so that a series of four successive signal levels of the different-interval rectangular pulses sampled at one edges of the equi-interval rectangular pulses differ from one to another succeeding series. The series of the signal levels thus fetched are stored in a signal level data storage means. A reference position determination unit is provided for generating a decision signal by determining the reference positions for the individual cylinders, respectively, on the basis of the four successive signal levels as stored.