Fuel injector seat assembly with positive contact seal between fuel injector sleeve and cylinder head
US6112722A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1998 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Jun 19, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M61/14
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An assembly including an engine component, such as a fuel injector, seated against a seating surface of a cylinder head is provided with a positive seal contact an uppermost point of contact between an injector sleeve and a seating surface of the cylinder head. The positive seal contact prevents coolant from the water jacket from travelling below the uppermost point of contact, thereby avoiding cavitation damage which might otherwise occur by the entrapment of liquid between the cylinder head seating surface and the injector sleeve. In an embodiment, a raised annular ridge is formed in the seating surface of the cylinder head at the location of the uppermost point of contact. This ridge becomes embedded in the injector sleeve. Also, in an embodiment, the cylinder head includes a circular recess upwardly from the uppermost point of contact. Although coolant from the water jacket can enter the recess, the recess radially separates the cylinder head from the injector sleeve by an amount that will not be closed under deflection due to cyclic loading on the injector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.