Method for controlling operating state of an internal combustion engine with an overshoot preventing function
US4636957A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1984 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Jun 21, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for controlling an operating state of an internal combustion engine by varying the amount of the fuel according to the pressure level in the intake air passage downstream of the throttle valve, comprises a step for sampling a signal of the pressure level in the intake air passage, a step for correcting the sampled value by adding a value corresponding to a difference between a latest sampled value and a preceding sampled value, to the latest sampled value, and a step for controlling the fuel supply amount according to the corrected value. The method further includes a step for controlling the level of the corrected value to a predetermined value when the level of the corrected value is becoming greater than the predetermined value, to prevent the generation of an overshoot in the corrected value which might cause an adverse affect on the air/fuel ratio control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.