Exhaust cleaning system for automotive internal combusion engine. [exhaust gas recirculation to heat air-fuel mixture for faster warmup of pollution control devices]

Patent · Tue Dec 23 04:00:00 EST 1975

OSTI ID:7355428

Shioyama, G; Masaki, K; Nambu, S

Improvements made in an automotive internal combustion engine enable a thermal reactor, a catalytic converter, or a combination of these to reach their activation temperature in a shortened period of time after the engine has initially been cranked. Toxic combustible residues can then be re-oxidized at an early stage of the idling operation of the engine. The improvements consist of an exhaust recirculation passageway to recirculate the exhaust gases from the engine for warming the air-fuel mixture when the temperature of the exhaust gases is lower than an activation temperature of the thermal reactor or the catalytic converter. Such improvements will be more advantageous when combined with a rapid engine warming arrangement for opening a carburetor throttle valve wider than usual and providing retarded spark-advance timings during cold driving of the engine.

• Assignee: Nissan Motor Co., Ltd.
• Patent Number(s): US 3927523
• OSTI ID: 7355428
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330700* -- Advanced Propulsion Systems-- Emission Control
AFTERBURNERS
AUTOMOBILES
CATALYTIC CONVERTERS
CONTROL
EQUIPMENT
EXHAUST GASES
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
GASEOUS WASTES
HEATING
POLLUTION CONTROL EQUIPMENT
TEMPERATURE CONTROL
VEHICLES
WASTES