Method for providing engine torque information
US6588258B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Nov 7, 2001 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Nov 7, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The method for providing engine torque information according to the present invention comprises the steps of: obtaining optimal ignition timing from a chart of RPM points and an amount of air intake; obtaining revised optimal ignition timing by adding amounts of ignition timing changed by a present coolant temperature and a present air-fuel ratio to the optimal ignition timing; calculating a difference between the revised optimal ignition timing obtained and real ignition timing at a present driving state; obtaining an ignition efficiency value by using the calculated difference; obtaining indicated torque from a chart at a present driving state, and then calculating a revised present indicated torque by multiplying the indicated torque by the air-fuel ratio efficiency and the ignition efficiency value; calculating real engine torque by subtracting friction torque from the revised present indicated torque; and providing the real engine torque to other control means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.