Method for determining the air mass in a cylinder
US7357127B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2005 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Mar 30, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The method for determining an air mass in a cylinder of an internal combustion engine with a supercharging device and with a device for variably controlling the valve overlap of the gas exchange valves is characterized by a reference characteristic curve for the air mass inside the cylinder that, according to the operating conditions, defines a linear correlation between the air mass inside the cylinder and the pressure inside the induction pipe, and when the induction pipe pressure exceeds the exhaust counter pressure, the value of the air mass from the reference characteristic curve is corrected with a value for the supercharging rate that is defined as the characteristic curve according to the operating conditions above the pressure inside the induction duct.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.