Mid-cycle fuel injection strategies
US9482168B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2015 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Jun 13, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus are disclosed for introducing a gaseous fuel into a combustion chamber of an internal combustion engine. The method includes dividing the engine map into three distinct operating regions, with different operating modes in each region. When the engine is operating in a low load region, gaseous fuel is introduced to the combustion chamber during an intake stroke before an intake valve associated with the combustion chamber closes. When the engine is operating in a high load low-speed region, gaseous fuel is directly injected into the combustion chamber during a compression stroke after the intake valve is closed. When the engine is operating in a high load high-speed region, a split injection strategy is employed with a first portion of the gaseous fuel introduced into the charge before the intake valve closes and a second portion being injected after the intake valve is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.