Fuel injection system and method for a diesel or stratified charge engine
US5313924A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1993 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Mar 8, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2250/31
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection system and method is disclosed which includes a high pressure pump that supplies fuel to a high pressure common rail, a plurality of electronically controlled fuel injectors that supply fuel from the common rail directly into different ones of the engine cylinders, a pressure regulator that varies the pressure of fuel contained in the common rail, a load sensor, an engine speed sensor, a crankshaft position sensor, and an electronic control unit coupled to control the pressure regulator and fuel injectors in response to signals received from the load sensor, speed sensor, and crankshaft position sensors. Using the pressure regulator and fuel injectors, the electronic control unit can provide independent control of the quantity of fuel injected into the cylinders, as well as the timing and duration of injection. The electronic control unit can be programmed to accommodate various engine environmental and state conditions for optimal engine performance. The high pressure pump can comprise the pumping element(s) from a rotary pump or a modified in-line or jerk-type pump having means for providing coarse control of the pressure in the common rail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.