Fuel puddle bleed shut-off for fuel injected two cycle engine
US4794889A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1988 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | Apr 11, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M37/20
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A marine fuel injection system for a two cycle crankcase compression internal combustion engine includes a puddled fuel return line (44) between the crankcase (16) and a vapor separator (33). A shut-off valve (50) in the puddled fuel return line (44) is closed at high engine speed to prevent the flow at a high rate of a substantially gaseous medium to the vapor separator, to prevent fuel foaming otherwise caused thereby in the vapor separator and which would pass through the vapor vent line (41) to the induction manifold (17), causing an over-rich condition at high engine speed. At low engine speed, the shut-off valve (50) is open, permitting flow of puddled fuel to the vapor separator, which flow is substantially more liquidic and at a lower rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.