Back to results
US 5,509,391 AGranted
Helmoltz isolation spool valve assembly adapted for a hydraulically-actuated fuel injection system
AssigneeCaterpillar Inc.
InventorJeffrey L. DeGroot
Life of this patent
Estimating the term…
Abstract
A spool valve assembly for isolating and/or minimizing actuating fluid pressure fluctuations between a pair of actuating fluid manifolds in a hydraulically-actuated fuel injection system. The spool valve assembly may be integrally formed with an actuating fluid supply pump or positioned remote therefrom in the fluid flowpath between the supply pump and the pair of actuating fluid manifolds.
Claims7
A fuel injection system comprising:
- an actuating fluid supply pump;
- a first plurality of hydraulically-actuated fuel injectors;
- a first actuating fluid manifold arranged in fluid communication with each of the first plurality of fuel injectors;
- a second plurality of hydraulically-actuated fuel injectors;
- a second actuating fluid manifold arranged in fluid communication with each of the second plurality of fuel injectors;
- means for controlling Helmholtz resonance of pressure waves between the first and second manifolds wherein said Helmholtz resonance controlling means includes a spool valve assembly operative to communicate actuating fluid from said actuating fluid supply pump to one of said manifolds only when the actuating fluid pressure in said other manifold is lower than the pressure in said one manifold.
3 more elements
Dependencies are inferred from the claim text.