Reciprocating machines
US7556014B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Nov 30, 2005 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | Feb 8, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M59/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A four-stoke reciprocating internal combustion engine includes the capability to change the distance between the crankshaft axis and the big end of the connecting rod and hence the maximum cylinder displacement within a combustion cycle. This provides for a given inducted volume of gases to be expanded over a greater volume. An exhaust gas aperture is uncovered by the piston towards the end of the expansion stroke. The piston and crankcase space serves as a pre-compression space for supercharging air to be inducted into the cylinder via ducts. A unitary valve device sliding axially co-operates with intake and exhaust apertures of the combustion cylinder. The unitary device extends at times into a recess in the head of the piston. A diffuse ignition source is provided. A fuel pump is operated by action of the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.