Patent · US Active

Spark plug extension

US11225939B2 · kind B2 · utility

0Cited by

1References

15Claims

0Family size

Assignee

SEM AB · SE

Inventors

Jorgen Bengtsson · Eksjö, SE
Bert Gustafsson · Åmål, SE
Mats Andren · Karlstad, SE

Key dates

Filing date	Jun 12, 2018
Grant date	Jan 18, 2022
Priority date	—
Expiry date	Oct 5, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH01F38/12
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The present invention relates to a spark plug extension body connecting an ignition coil with a spark plug for a spark ignited internal combustion engine, as well as a method for providing such a spark plug extension body for reduction of partial electrical discharges in the spark plug extension body. In conventional spark plug extensions are coil springs used as electrical conductor against the spark plug terminal and/or ignition coil terminal. These coil springs cause Corona effects and short circuiting requiring replacement of the spark plug extension. With the invention the entire electrical conductor (CRu, 64, CRL) is in a rod like form and at least both ends (CRu, CRL) of the electrical conductor (CRu, 64, CRL) are made as a monolith in a flexible and electrically conducting polymeric material, preferably electrically conducting rubber.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.