Exhaust gas purification system
Patent
·
OSTI ID:7367016
A description is given of a secondary air supply control system for internal combustion engine exhaust gas purification systems. A change-over valve selectively supplies secondary air from the air pump either to the upstream side of the catalytic converter or to a second change-over valve, and an on-off valve and control valve controls the switching. The second change-over valve supplies the secondary air from the first change-over valve to the exhaust ports of the engine for discharging into the atmosphere, and a second valve controls the switching action. Part of the secondary air from the air pump is supplied to the downstream side of the catalytic converter. (auth)
- Assignee:
- Toyota Jidosha Kogyo Kabushiki Kaisha
- Patent Number(s):
- US 3921396
- OSTI ID:
- 7367016
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
33 ADVANCED PROPULSION SYSTEMS
330700* -- Advanced Propulsion Systems-- Emission Control
AIR
AUTOMOBILES
CATALYTIC CONVERTERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
DESIGN
EQUIPMENT
EXHAUST GASES
FLOW REGULATORS
FLUID FLOW
FLUIDS
GAS FLOW
GASEOUS WASTES
GASES
POLLUTION CONTROL EQUIPMENT
PUMPS
VALVES
VEHICLES
WASTES
330700* -- Advanced Propulsion Systems-- Emission Control
AIR
AUTOMOBILES
CATALYTIC CONVERTERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
DESIGN
EQUIPMENT
EXHAUST GASES
FLOW REGULATORS
FLUID FLOW
FLUIDS
GAS FLOW
GASEOUS WASTES
GASES
POLLUTION CONTROL EQUIPMENT
PUMPS
VALVES
VEHICLES
WASTES