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:
Jun. 22, 1993
Filed:
Jun. 25, 1991
Tsuyoshi Sodeno, Kanagawa, JP;
Shinsuke Nakazawa, Kanagawa, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An apparatus for use with an internal combustion engine having first and second throttle valves located in series within an engine induction passage. The apparatus comprises a first sensor associated with the first throttle valve for deriving a first sensor signal indicative of a first throttle valve position and a second sensor associated with the second throttle valve for deriving a second sensor signal indicative of a second throttle valve position. The first and second minimum values of the first and second sensors are detected. The detected first and second minimum values correspond to minimum positions of the first and second throttle valves, respectively. A difference between the first and second minimum values is calculated and one of the first and second sensor signals is corrected in a direction zeroing the calculated difference. The corrected one of the first and second sensor signals is further corrected based upon a constant corresponding to a difference between the minimum positions of the first and second throttle valves.