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:
Jul. 11, 2017
Filed:
Nov. 04, 2013
Denso Corporation, Kariya, Aichi-pref., JP;
DENSO CORPORATION, Kariya, JP;
Abstract
An ignition device includes a spark plug and an ignition coil. The spark plug is attached to a cylinder head such that a center electrode and a ground electrode project into a combustion chamber. In an internal combustion engine, airflow is generated in a predetermined direction to the spark plug during a compression step. The ignition coil has a primary coil and a secondary coil. An output voltage of the secondary coil after interruption of energization of the primary coil is restricted to a predetermined voltage or less. The ground electrode has a leg portion extending from a housing of the spark plug and an opposing portion that extends in a direction intersecting with the leg portion and forms a gap by opposing the center electrode. The leg portion is attached to a position further upstream than the gap in a flow direction of the airflow during the compression step.