Device for controlling the recirculation of exhaust gases in internal combustion engines
US4479478A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 1983 |
| Grant date | Oct 30, 1984 |
| Priority date | — |
| Expiry date | Oct 11, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/57
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device is disclosed for controlling the recirculation of exhaust gas for an internal combustion engine 1 in which an air-fuel mixture intake pipe 2 and an exhaust pipe 3 are connected with each other by a recirculation circuit having a main valve 4 and connecting pipes 5 and 6. This valve 4 is controlled by the partial vacuum prevailing at the venturi V of the intake pipe 2 by a solenoid valve 14. According to the invention, this control device includes a control system 13 having an additive type pneumatic amplifier 17 that generates a partial vacuum signal for the control of this main valve 4 whose strength is greater than the value of partial vacuum at the nozzle 16 of the venturi throat V, with a constant value in a range of extended operation. Application is particularly to internal combustion engines equipped with a system for recirculation of exhaust gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.