Patent ID: 7793863

Claim:
A fuel injector comprising: a piezo-actuator in electrical communication with one or more piezo-actuator terminal pin, an injector housing arrangement comprising a piezo-housing; a contact module, and a cover, wherein the piezo-housing houses the piezo actuator, and wherein the cover defines one or more cover openings, wherein each cover opening is configured to receive one of the piezo-actuator terminal pins such that a section of each terminal pin protrudes through a respective cover opening, a sealing element formed from a liquid-tight material, wherein the sealing element forms a seal with a circumferential area around each terminal pin and forms a seal between the piezo-housing and the contact module, and a ventilation system that promotes an exchange of gas between an area outside of the injector housing arrangement and an area outside of the sealing element, the ventilation system comprising one or more gas exchange openings formed in the injector housing arrangement.