Control device for internal combustion engine using imbalance diagnosis and abnormality determination
US10508609B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Aug 30, 2017 |
| Grant date | Dec 17, 2019 |
| Priority date | — |
| Expiry date | Aug 30, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2250/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
When imbalance diagnosis is not executed, target fuel pressure is set based on a rotation speed and volumetric efficiency of an engine, and when the imbalance diagnosis is executed, fuel pressure smaller than the target fuel pressure settable when the imbalance diagnosis is not executed is set as the target fuel pressure, and a high-pressure fuel pump that supplies fuel to a delivery pipe connected to the in-cylinder injection valve, is driven and controlled such that detected fuel pressure becomes the target fuel pressure. With this, it is possible to execute the imbalance diagnosis with higher accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.