Variable compression-ratio control device for an internal combustion engine
US4834031A · kind A · utility
40Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1988 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Jul 13, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/227
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable compression ratio control device includes a mechanism for varying a compression ratio of an engine in response to engine driving conditions, at least between a higher stage and a lower stage, a compression ratio detecting sensor for detecting a current compression ratio, a sensor fault detecting unit for detecting a malfunction of the compression ratio detecting sensor, and a fail-safe unit for lowering and fixing the compression ratio when the sensor fault detecting unit detects a malfunction of the compression ratio detecting sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.