Method of controlling an engine with a pseudo throttle position sensor value
US6250292A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 2000 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Mar 6, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0406
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In the event that a throttle position sensor fails, a method is provided which allows a pseudo throttle position sensor value to be calculated as a function of volumetric efficiency, pressure, volume, temperature, and the ideal gas constant. This is accomplished by first determining an air per cylinder (PAC) value and then calculated the mass air flow into the engine as a function of the air per cylinder (APC) value. The mass air flow is then used, as a ratio of the maximum mass air flow at maximum power at sea level for the engine, to calculate a pseudo throttle position sensor value. That pseudo TPS (BARO) value is then used to select an air/fuel target ratio that allows the control system to calculate the fuel per cycle (FPC) for the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.