Knock control system for engine
US5101790A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1990 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Oct 15, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A knock control system which detects a knock occurring in an engine, a knock detector for detecting the occurrence of the knock in accordance with a knock sensor signal produced by the sensor, a first adjuster for adjusting knock control factors so as to suppress the knock on the basis of a detected signal from the knock detector, a converter for converting the knock sensor signal so as to make the frequency distribution of the knock sensor signal equal to an exponential distribution, a standard deviation calculator for calculating the standard deviation of the exponential distribution, and a second adjuster for adjusting knock control factors so that this standard deviation reaches a predetermined value, whereby the standard deviation of the frequency distribution of the knock sensor signal can be easily detected, thus making it possible to reduce the load on the electronic control system and prevent the knock detection precision from being reduced by the characteristic change of the knock sensor, engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.