On-vehicle engine control apparatus
US6805094B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2002 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Dec 12, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D11/107
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An on-vehicle engine control apparatus carries out engine drive control and throttle control using one single CPU and improves safety. The apparatus includes a load relay for feeding a power to a motor that controls throttle valve opening, a first IC (integrated circuit element) containing a CPU, and a second IC connected to the first IC via serial interfaces. The apparatus further includes a first mutual diagnostic device incorporated in the first IC and diagnoses operation of the second IC, a second mutual diagnostic device incorporated in the second IC to diagnoses operation of the first IC, and a detector for detecting an abnormality in operation of each system involved in throttle valve control. Operation of the load relay is controlled based on diagnostic results and abnormality detection results of the first and second mutual diagnostic devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.