Idle actuator speed control
US5996553A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Feb 17, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/704
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine idle air control system including an idle air control actuator coupled to an idle air control valve for varying the position of the valve within an engine intake air passage for engine inlet air control under idle operating conditions adjusts the time rate of change in position of the idle air control valve in response to change in barometric pressure to account for change in air density passing across the valve and to account for change in torque load acting against the valve to precisely respond to torque load changes during idle operations without violating idle air control actuator stability margins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.