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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.:

US 10502101 B1

PDFFull Text
Date of Patent:
Dec. 10, 2019

Filed:

Mar. 11, 2016

Variable valve system

Applicant:

Denso Corporation, Kariya, Aichi-pref., JP;

Inventor:

Haruyuki Urushihata, Kariya, JP;

Assignee:

DENSO CORPORATION, Kariya, JP;

Attorney:

Nixon & Vanderhye P.C.

Primary Examiner:

Jorge L Leon, Jr

Assistant Examiner:

Wesley G Harris

Int. Cl.
CPC ...
F01L 13/00 (2006.01); F01L 1/352 (2006.01); F02D 41/00 (2006.01); F02D 13/02 (2006.01); G01M 15/06 (2006.01); F02D 41/24 (2006.01); F01L 1/053 (2006.01); F02D 41/28 (2006.01);
U.S. Cl.
CPC ...
F01L 13/00 (2013.01); F01L 1/352 (2013.01); F02D 13/0219 (2013.01); F02D 41/009 (2013.01); G01M 15/06 (2013.01); F01L 1/053 (2013.01); F01L 2013/111 (2013.01); F01L 2013/113 (2013.01); F01L 2250/02 (2013.01); F01L 2800/14 (2013.01); F01L 2820/032 (2013.01); F01L 2820/041 (2013.01); F01L 2820/042 (2013.01); F02D 41/2474 (2013.01); F02D 2041/001 (2013.01); F02D 2041/281 (2013.01); F02D 2200/101 (2013.01); Y02T 10/18 (2013.01);
Abstract

A variable valve system including a crank angle sensor that measures a rotation angle of a crankshaft, a cam angle sensor that measures a rotation angle of a camshaft coupled to the crankshaft and which opens and closes valves, and a controller that controls the internal combustion engine. At least one of the crank angle sensor or the cam angle sensor is configured as an absolute angle sensor that measures an absolute rotation angle and outputs a voltage signal corresponding to this rotation angle. The controller is configured to perform a correction operation that corrects a rotation angle value calculated based on the voltage signal.

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