Evaporative emission control system for an internal combustion engine

Patent · Tue Jan 05 04:00:00 EST 1982

OSTI ID:5584948

Goto, O; Uozumi, Y; Watanabe, M

An evaporative emission control system for an internal combustion engine is described in which fuel vapors generated in a fuel reservoir are stored in a fuel vapor storage canister when the engine is stopped so that the fuel vapors may be used when the engine is in operation. A purge control valve is disposed on a discharge port of the canister. The purge control valve is designed so that it is not opened unless a temperature of the engine exceeds a level above a predetermined threshold even when the engine is in operation. When the engine is operated at a low temperature, the stored fuel vapors in the canister are not released for stabilization in the air-fuel ratio of a mixture fed to the engine, and when the engine is operated at a high temperature, the stored fuel vapors are released into the engine to effectively consume the fuel.

• Assignee: Honda Giken Kogyo K K (Japan)
• Patent Number(s): US 4308842
• OSTI ID: 5584948
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100 -- Internal Combustion Engines
330700* -- Advanced Propulsion Systems-- Emission Control
AIR POLLUTION CONTROL
CONTROL
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLOW REGULATORS
FLUIDS
FUELS
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPERATION
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
TEMPERATURE CONTROL
VALVES
VAPORS
WASTES