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:
Aug. 16, 2022
Filed:
Dec. 02, 2021
Mazda Motor Corporation, Hiroshima, JP;
Tomonori Urushihara, Aki-gun, JP;
Masanari Sueoka, Aki-gun, JP;
Yusuke Kawai, Aki-gun, JP;
Atsushi Inoue, Aki-gun, JP;
Masatoshi Hidaka, Aki-gun, JP;
Kota Matsumoto, Aki-gun, JP;
Tota Tanii, Aki-gun, JP;
Michiharu Kawano, Aki-gun, JP;
Toru Miyamoto, Aki-gun, JP;
Tsubasa Ito, Aki-gun, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
An internal combustion engine is provided, which includes a variable phase mechanism configured to change rotational phases of intake and exhaust camshafts so that a valve overlap is made. An intake cam lobe is formed such that an open period of the intake valve is 210° or larger and 330° or smaller of a crank angle. The exhaust cam lobe is formed such that, during the overlap period with the rotational phase of the intake camshaft advanced to the maximum and the rotational phase of the exhaust camshaft retarded to the maximum, an effective valve lift amount (Lift(CA)) of the exhaust valve which is a function of a crank angle from the open timing (CA) of the intake valve to a middle timing (CA) of the overlap period, an inner circumferential length (L_ex) of a valve seat, and a swept volume (V) per cylinder satisfy the following formula: