Device for purging evaporated fuel captured by a charcoal canister

Patent · Tue Oct 20 04:00:00 EDT 1987

OSTI ID:5977899

Uranishi, K; Itou, T

A device is described for purging evaporated fuel captured by a charcoal canister from a fuel supply system of an internal combustion engine having an intake path and carburetor located in the intake path. The device consists of: a purge path connecting the charcoal canister for capturing evaporated fuel to the engine intake path downstream of the carburetor; an ON-OFF valve provided in the purge path; a fixed throttle arranged in the purge path in parallel with the ON-OFF valve; means for operating the ON-OFF valve to be open at engine loads higher than a predetermined engine load and to be closed at engine loads lower than the predetermined engine load; a solenoid valve provided in the purge path in series with the parallel arrangement of the ON-OFF valve and the throttle; and a means for actuating the solenoid to be closed at low engine speeds and low engine temperatures and to be open at all other engine operating conditions.

• Assignee: Toyota Jidosha Kabushiki Kaisha, Aichi
• Patent Number(s): US 4700683
• OSTI ID: 5977899
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
ACTUATORS
ADSORBENTS
CARBURETORS
CHARCOAL
CONTROL EQUIPMENT
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ENGINES
EQUIPMENT
EVAPORATION
FLOW REGULATORS
FLUIDS
FUEL SYSTEMS
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPERATION
PHASE TRANSFORMATIONS
SOLENOIDS
VALVES
VAPORS