Unit injector cooled by timing control fluid
US4410138A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1981 |
| Grant date | Oct 18, 1983 |
| Priority date | — |
| Expiry date | Dec 31, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A unit injector (200, 300, 400, 500, 600) of the cam actuated, open nozzle type is disclosed including an extremely compact injector body (202, 302, 402, 502) having a minimum number of internal flow passages and a two piece injector plunger (222, 308, 310, 412, 506, 510, 606, 612) arranged to provide pressure/time metering (all embodiments), scavenging fuel flow (all embodiments), hydraulic timing (all embodiments), fuel cut off (embodiments of FIGS. 1, 3 and 4), wear compensation in advance timing mode (all embodiments) and sharp cut off of fuel injection without high "crush" loads and wear compensation in retard and advance modes (embodiment of FIG. 3). All embodiments of this invention are characterized by an injector body (202, 302, 402, 502) having an exterior shape designed to form a fuel supply flow path and an isolated fuel drain flow path between the exterior surface of the injector body (202, 302, 402, 502) and the interior surface of the recess in which the injector (200, 300, 400, 500, 600) is designed to be received. This arrangement allows a very simple pattern of passages (mostly radial passages) to be formed in the injector body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.