Pumping loss calculation device for internal combustion engine
US9599536B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2015 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Nov 19, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pumping loss calculation device for an internal combustion engine, which is capable of accurately calculating the pumping loss of the engine while reflecting thereon the pumping loss which varies with a change in opening timing of an exhaust valve. The pumping loss calculation device calculates a basic amount of a pumping loss torque based on intake and exhaust pressures, a pumping loss torque of the pumping loss torque of the engine, which varies with a change in the opening timing of the exhaust valve, as an exhaust gas sweep-out loss torque, based on the estimated in-cylinder gas amount and a detected exhaust phase, and the pumping loss torque based on the basic amount and the exhaust gas sweep-out loss torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.