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Title: Catalytic converter for exhaust gas purification

Abstract

A catalytic converter is adapted to retard spark timing to increase the temperature of the converter catalyst when a temperature sensor within the converter senses low exhaust temperature. A vacuum advance mechanism is responsive to intake manifold vacuum conducted thereto via an intake vacuum passageway to advance spark timing for the engine. The temperature of exhaust gas from a catalytic converter for exhaust emissions is sensed. When the sensed temperature of the exhaust is below a predetermined value, a comparator outputs an actuation signal which is used to cause a solenoid valve to open an air passageway to admit atmospheric air into the vacuum advance mechanism so that spark timing will be retarded, thereby increasing the temperature of the catalyst. At least one of a transmission neutral switch, a throttle switch and a clutch switch connected in series may be provided in the circuit between the comparator and the solenoid valve for returning spark timing to a standard value when any of the switches is open. At least one of the intake vacuum passageway and the air passageways may be provided with a member for restricting the internal cross-sectional area of the associated passageway to obtain the desired spark timingmore » relationship.« less

Inventors:
;
Publication Date:
OSTI Identifier:
6370751
Patent Number(s):
US 4458484
Assignee:
Nissan Motor Company Limited (Japan)
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 2 Apr 1982, Japan; Other Information: PAT-APPL-365106
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; EXHAUST GASES; PURIFICATION; SPARK IGNITION ENGINES; CATALYTIC CONVERTERS; COMPARATOR CIRCUITS; SIGNALS; SOLENOIDS; SWITCHES; TEMPERATURE CONTROL; VACUUM SYSTEMS; CONTROL; ELECTRIC COILS; ELECTRICAL EQUIPMENT; ELECTRONIC CIRCUITS; ENGINES; EQUIPMENT; FLUIDS; GASEOUS WASTES; GASES; HEAT ENGINES; INTERNAL COMBUSTION ENGINES; POLLUTION CONTROL EQUIPMENT; WASTES; 330101* - Internal Combustion Engines- Spark-Ignition; 330700 - Advanced Propulsion Systems- Emission Control

Citation Formats

Toryu, K, and Higashi, K. Catalytic converter for exhaust gas purification. United States: N. p., 1984. Web.
Toryu, K, & Higashi, K. Catalytic converter for exhaust gas purification. United States.
Toryu, K, and Higashi, K. 1984. "Catalytic converter for exhaust gas purification". United States.
@article{osti_6370751,
title = {Catalytic converter for exhaust gas purification},
author = {Toryu, K and Higashi, K},
abstractNote = {A catalytic converter is adapted to retard spark timing to increase the temperature of the converter catalyst when a temperature sensor within the converter senses low exhaust temperature. A vacuum advance mechanism is responsive to intake manifold vacuum conducted thereto via an intake vacuum passageway to advance spark timing for the engine. The temperature of exhaust gas from a catalytic converter for exhaust emissions is sensed. When the sensed temperature of the exhaust is below a predetermined value, a comparator outputs an actuation signal which is used to cause a solenoid valve to open an air passageway to admit atmospheric air into the vacuum advance mechanism so that spark timing will be retarded, thereby increasing the temperature of the catalyst. At least one of a transmission neutral switch, a throttle switch and a clutch switch connected in series may be provided in the circuit between the comparator and the solenoid valve for returning spark timing to a standard value when any of the switches is open. At least one of the intake vacuum passageway and the air passageways may be provided with a member for restricting the internal cross-sectional area of the associated passageway to obtain the desired spark timing relationship.},
doi = {},
url = {https://www.osti.gov/biblio/6370751}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 10 00:00:00 EDT 1984},
month = {Tue Jul 10 00:00:00 EDT 1984}
}