Internal combustion engine having a sound-damping casing
US4993381A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Sep 13, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B77/13
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine has a casing which includes interconnected elements and is connected to an engine housing with interposed vibration-damping means. The engine also has a cooling air blower driven by an engine crankshaft which draws in cooling air through an inlet opening in said casing and conveys such cooling air through an interior space between the engine housing and the casing. Exhaust air from such interior space exits through an outlet opening in said casing, the inlet and outlet openings being disposed in a single element of the casing which element is a closed unit at a side of the engine remote from the blower and is equipped with at least one sound-damping layer. The sound-damping layer has casing element passages formed therein which are separate from one another and which communicate said interior space respectively with the inlet and outlet openings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.