Method and system for determining diesel engine airflow in an engine using a late intake valve closure strategy
US9163570B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2013 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Apr 30, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method can determine diesel engine airflow in a diesel internal combustion engine using a late intake valve closure (LIVC) strategy. The method includes monitoring the air temperature in an intake manifold to determine an intake manifold air temperature; monitoring a coolant temperature; and determining the air temperature in an intake port of a diesel internal combustion engine. The method includes monitoring the air pressure in the intake manifold and monitoring the engine speed of the diesel internal combustion engine. Moreover, the method includes determining the air density in the diesel internal combustion engine and determining a diesel engine airflow; and determining an intake valve closure crank angle. The method additionally includes determining an adjusted diesel engine airflow based on the diesel engine airflow, engine speed, and intake valve closure crank angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.