Fault detection system for internal combustion engine control apparatus
US4850325A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1989 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Jan 12, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B77/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fault detection system for detecting a fault of a subcontrol apparatus as well as a main control apparatus backed up thereby in controlling the operation of an actuator for an internal combustion engine control apparatus such as a throttle control apparatus is disclosed. A second fault detection apparatus for the subcontrol apparatus is made up of a CPU consituting the main control apparatus, so that the fault detection apparatus for the subcontrol apparatus operates under condition that the main control apparatus is normal and the engine is preferably under a light load of operation. Each of the main control and the backup subcontrol apparatuses includes a fault detection apparatus, thereby preventing simultaneous fault of the two control apparatuses for improved safety of the vehicle drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.