Adjustable timing mechanism for fuel injection system
US4206734A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1977 |
| Grant date | Jun 10, 1980 |
| Priority date | — |
| Expiry date | Dec 27, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M39/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
This disclosure deals with apparatus for adjusting the timing of injection in an internal combustion engine wherein the fuel system includes unit injectors. The injector for each combustion chamber of the engine is actuated to inject fuel by a cam-follower-linkage mechanism that operates in time relation with the movement of the pistons of the engine. Each such mechanism includes a cam which is rotated in synchronism with the pistons of the engine, a pivotable cam follower which rides on the cam, and a linkage which connects the follower with an injector. The injector includes a plunger which seats on a cup or nozzle to terminate injection. To adjust the timing of injection, the pivot point of the follower and the angular point of engagement of the follower with the cam are moved. The relation of the cam, the follower and the linkage are arranged such that the movement of the linkage does not materially change the effective travel of the plunger as the timing is changed within a broad range. Consequently, the compression load on the plunger and the injector nozzle remains substantially constant at the termination of injection regardless of changes of the timing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.