Air leading-type stratified scavenging two-stroke internal-combustion engine
US10487777B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2015 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Oct 18, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F7/0004
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The efficiency of charging air to a scavenging channel is enhanced by generating a gas flow in a piston groove simultaneously with the piston groove coming into communication with an air port. A piston groove 8 formed in a peripheral surface of a piston includes a pressure transmission through hole 10, and the pressure transmission through hole 10 consistently communicates with a crankcase. In the course of the piston moving up, upon a pressure in the crankcase becoming negative, the negative pressure in the crankcase affects the piston groove 8 through the pressure transmission through hole 10. Consequently, a pressure in the piston groove 8 is released to the crankcase through the pressure transmission through hole 10. Upon the piston moving up and the piston groove 8 being thereby brought into communication with the air port 4a, air enters the piston groove 8 through the air port 4a ((III) of FIG. 1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.