Control device for in-cylinder injection internal combustion engine
US8100109B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 2009 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Aug 27, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2250/31
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A control device is for an in-cylinder injection engine that makes fuel have high pressure through a high pressure pump to supply fuel to an injector and then injects fuel directly into a cylinder from the injector. The control device includes a fuel pressure detecting device for detecting pressure of fuel supplied to the injector, a target fuel pressure setting device for setting a target fuel pressure according to an engine operating state, a fuel pressure control device for feedback-controlling a fuel discharge amount from the pump such that fuel pressure detected by the detecting device accords with the target fuel pressure, a stop predicting device for determining whether the engine is about to stop, and a target fuel pressure gradual change device for decreasing the target fuel pressure gradually to a final target fuel pressure lower than normal, when it is determined that the engine is about to stop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.