Anti-knocking in internal combustion engine
US4711212A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1986 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Nov 21, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Disclosed is an anti-knocking control system for controlling an internal combustion engine to prevent knocking in accordance with a knocking condition detected by a knock detecting apparatus on the basis of a distribution pattern of knock magnitude values derived from the output signal of a knock sensor. The knock detection apparatus is arranged to derive a knock magnitude value from the output signal of the knock sensor generated within a predetermined engine rotational angle at an interval thereby obtaining a plurality of knock magnitude values, determine a pattern of distribution of the plurality of the knock magnitude values on the basis of the results of comparison between the frequency that the knock magnitude value exceeds an upper threshold value and the frequency that the knock magnitude value goes below a lower threshold value, and detect a knocking condition of the engine in accordance with the determined distribution pattern. The lower threshold value is a value corresponding to a cumulative point lower than the cumulative 50% point of a cumulative distribution and the upper threshold value is a value corresponding to a cumulative point higher than the cumulative 50% po…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.