Exhaust gas cleaning system for internal combustion engines

Patent · Tue Oct 05 04:00:00 EDT 1976

OSTI ID:7336928

Goto, K; Ishikawa, N

An exhaust gas cleaning system for an internal combustion engine is described. The cleaning system comprises a change-over valve having its inlet port communicating with an air pump, its first outlet port communicating with the exhaust system of the engine and its second outlet port communicating with the intake system of the engine through a flow control valve. The change-over valve has communication of its outlet ports switched in accordance with the temperature of a catalytic converter which is disposed in the exhaust system. In a modification, a duct providing communication between the second outlet port of the change-over valve and the flow control valve is provided to communicate with the exhaust system.

• Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
• Patent Number(s): US 3983697
• OSTI ID: 7336928
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330701* -- Emission Control-- Nitrogen Oxides
330702 -- Emission Control-- Carbon Monoxide
330704 -- Emission Control-- Hydrocarbons
AIR
CATALYTIC CONVERTERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
ENGINES
EQUIPMENT
EXHAUST GASES
FLOW REGULATORS
FLUIDS
GASEOUS WASTES
GASES
INTERNAL COMBUSTION ENGINES
MIXING
OPERATION
POLLUTION CONTROL EQUIPMENT
TEMPERATURE DEPENDENCE
VALVES
WASTES