Constant velocity carburetor with variable venturi slide having bleed holes at an oblique angle and method of operation
US5707560A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Aug 12, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M7/17
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable Venturi slide includes a beveled edge at an oblique angle to lower surface of the slide and air flow, and an auxiliary hole having an opening on the beveled edge communicating between the air flow and the interior of the variable Venturi slide. By being located on the beveled edge, the opening of the auxiliary hole is effectively kept out of the high velocity low air pressure air stream at lower air velocities during partial throttle conditions. The auxiliary hole bleeds vacuum from the interior of the variable Venturi slide, picked up by the other lift hole located on the bottom of the slide, and slows the slide lift rate. The slide stays down or rises very slowly under conditions in which a conventional prior art slide would be starting to rise at a linear rate. At higher air velocities, when the throttle plate is opened quickly or operated at near wide open conditions, the opening of the auxiliary hole adds vacuum to the interior of the slide, and increases the slide lift rate. In such manner, the lift rate of the slide is reduced at lower air pressure and velocity, while at the same time, the lift rate of the slide is increased at higher air pressure and velocity. Th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.