Fuel injection pump with opposed regulating springs
US6725845B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jul 26, 2002 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Sep 17, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Accordingly, the reader will see that this invention is a fuel injection pump which uses an opposed pair of springs acting in parallel to affect the movement of a piston used to pump fuel. Engine pressure pulses, preferably from an engine cylinder, apply a force on the piston and the springs affect the piston's movement to affect the quantity of fuel injected. The spring rates of the springs and their pre-load, or compression, can be adjusted to affect the fuel injection quantity. Proper selection of these spring rates and compressions allows the user to change the pump's specific output and shape this output as a function of engine torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.