Invention Grant
- Patent Title: Spark plug with air recirculation cavity
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Application No.: US15709523Application Date: 2017-09-20
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Publication No.: US10014666B1Publication Date: 2018-07-03
- Inventor: Matthew Bresler
- Applicant: Matthew Bresler
- Applicant Address: US MI Auburn Hills
- Assignee: FCA US LLC
- Current Assignee: FCA US LLC
- Current Assignee Address: US MI Auburn Hills
- Agent Ralph E. Smith
- Main IPC: H01T13/00
- IPC: H01T13/00 ; H01T13/16 ; F02P11/02

Abstract:
A spark plug assembly includes a housing having an inner wall defining a bore, the housing having an open end connected to the bore, a ceramic insulator disposed within the bore and having a conical nose extending from the open end, an insulator electrode extending from the conical nose, a ground electrode coupled to and extending from the housing, wherein a spark gap is defined between the insulator electrode and the ground electrode, and a volume defined between the housing inner wall and an outer wall of the conical nose. The volume includes (i) a primary cavity, and (ii) a wide recirculation cavity defining a curved path such that gas flow entering the volume is received therein in a first direction and redirected in a second opposite direction to create an cooling airflow along the ceramic insulator and reduce a risk of low speed pre-ignition.
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