In-engine deposit detection apparatus for engine control system
US4869224A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 28, 1988 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Jul 28, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An in-engine deposit detection apparatus for an engine control system is disclosed, comprising a sensor for detecting the output air-fuel ratio of the exhaust gas, a device for controlling the fuel supply amount according to the output air-fuel ratio from the sensor, acceleration detector for detecting a time point when an acceleration command is given the engine, a device for measuring a value based on the time length from a command time point detected by the acceleration detector to a time point that the sensor detects the shift of the output air-fuel ratio to rich side, a device for giving a reference value defining a limit of a normal range of the measurement obtained on the basis of the time length from the command time point detected by the acceleration detection means to the time point when the sensor detects that the output air-fuel ratio has shifted to rich side, and a device for comparing the measurement from the measuring means with a reference and deciding that there exists a deposit having an adverse effect on the engine control when the measurement deviates from the normal range defined by the reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.