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:
Oct. 20, 2020
Filed:
Sep. 25, 2019
Denso Corporation, Kariya, Aichi-pref, JP;
Yuuki Kawata, Nisshin, JP;
Fumiaki Aoki, Nisshin, JP;
Daisuke Tanaka, Nisshin, JP;
Ryota Wakasugi, Nisshin, JP;
Kanechiyo Terada, Kariya, JP;
Tetsuya Miwa, Kariya, JP;
Akimitsu Sugiura, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
In a spark plug for an internal combustion engine, a discharge gap is formed between a central electrode and a ground electrode in an axial direction of the spark plug. An insulator of a cylindrical shape has an axial hole and an insulator front end part. The axial hole is formed in the insulator, into which the central electrode is arranged and supported. The insulator front end part projects further toward a front side of the insulator in the axial direction of the spark plug than a location of an opening part formed at a front end side of the axial hole. The discharge gasp is formed in an auxiliary combustion chamber. The outer peripheral side of the auxiliary combustion chamber is covered with the insulator front end part.