Evaporative emission control system for supercharged internal combustion engine
US5183023A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 1991 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | Nov 1, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/089
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The canister's inlet port is communicated to the fuel tank headspace through a first conduit, its outlet port is communicated through a second conduit containing the purge control valve to a location in the air intake system that is downstream of the throttle plate, and its atmospheric vent port is communicated through a third conduit to a location in the air intake system that is between the air filter and the supercharger, rather than directly to atmosphere. During non-supercharged operation of the engine, vapors in the canister are purged through the second conduit and purge control valve in the usual manner and air enters the canister through the third conduit. During supercharged operation, the purge flow is reversed such that purged vapors pass through the third conduit while the purge valve maintains control over the purge flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.