Adaptive control system for an internal combustion engine
US4841933A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Dec 29, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An adaptive control system and method for a multi-cylinder internal combustion engine is provided wherein a perturbation generator perturbs an engine control parameter of a cylinder about a base-line value, and a measuring means measures the slope of an engine output with respect to perturbations in the engine control parameter caused by the perturbation generator. A correction unit employs the measured slope to correct at least one engine control parameter of the engine so as to obtain a desired value of the slope measured by the measuring means. The corrected control parameter can be the same or different from the perturbed control parameter. The perturbation generator operates in a first perturbation mode in an upper speed range of the engine and in a second perturbation mode in a lower speed range of the engine. The slope measuring unit operates in different measurement modes corresponding to these perturbation modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.