Arrangement for deriving intake negative pressure from an internal-combustion engine
US4033124A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1975 |
| Grant date | Jul 5, 1977 |
| Priority date | — |
| Expiry date | Dec 23, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M17/525
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An arrangement for deriving intake negative pressure from an internal-combustion engine, comprising a carburetor in the latter, with an intake for an air -- fuel mixture, a throttle valve therein for regulating the mixture, and at least one longitudinal passage therein for guiding the mixture toward the engine; an intake passage leading from the carburetor to the engine; which latter also has an exhaust passage leading therefrom; wherein the throttle valve has a shaft substantially transversally disposed in one of the passages of the carburetor, the latter being fitted with a discharge opening in a side wall of the intake passage to derive negative passage from the carburetor for regulating and controlling the engine operation; the discharge opening being provided in the flow of the mixture, in an area that is directed downstream from the throttle-valve shaft; whereby to avoid accumulation and discharge of condensed fuel from the carburetor to the discharge opening. The arrangement can be associated with a control circuit for the engine, including pressure-responsive elements, as well as an air pump for delivering secondary air to the exhaust passage of the engine. According to an …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.