End-of-current trim for common rail fuel system
US9856840B2 · kind B2 · utility
2Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2016 |
| Grant date | Jan 2, 2018 |
| Priority date | — |
| Expiry date | Jul 6, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/2058
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Fuel is injected by energizing a solenoid of a fuel injector for an on-time that terminates at a first end-of-current timing. An end-of-current trim is determined at least in part by estimating a duration between an induced current event in a circuit of the solenoid and a valve/armature interaction event. An induced current event occurs when an armature abruptly stops, and a valve/armature interaction event occurs when the armature couples with or de-couples from the valve member. Fuel is injected in a subsequent injection event by adjusting the end-of-current timing by the end-of-current trim.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.