Study on conformity technology with ULEV using EHC system

Book · Sun Sep 01 00:00:00 EDT 1996

DOI:https://doi.org/10.4271/960342· OSTI ID:277872

Shimasaki, Yuichi; Kato, Hiroaki; Muramatsu, Hiroaki; Teshirogi, Tetsu; Aoki, Takuya; Saito, Akihisa; Rodrigues, G

An electrically heated catalyst (EHC) and an electric pump driven secondary air supply were employed to heat and energize the catalyst immediately after starting the engine. This measure made it possible for a high performance in-line four-cylinder engine with an exhaust system layout of 4-2-1 to meet the Ultra Low Emissions Vehicle (ULEV) category of the Californian Air Resource Board (CARB). Additionally, the following items are also reported in this paper: (1) light-off catalyst and its effectiveness in reduced emissions and rise in temperature; (2) comparison between alternator-powered EHC system and battery powered EHC system; (3) comparison between extrusion type and metal foil type EHCs; (4) power losses due to the EHC system; (5) EHC with non-contact Hall element electric current sensor used, and an OBD-2 system featuring a secondary air supply system; and (6) detection of the EHC system OBD-2 catalyst deterioration.

• OSTI ID: 277872
• Report Number(s): CONF-960204-; ISBN 1-56091-803-9; TRN: IM9637%%287
• Resource Relation: Conference: International congress and exposition of the Society of Automotive Engineers (SAE), Detroit, MI (United States), 26-29 Feb 1996; Other Information: PBD: 1996; Related Information: Is Part Of Cold-start emission control and catalyst technologies; PB: 271 p.
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
CATALYTIC CONVERTERS
GAS INJECTION
PERFORMANCE
CATALYSTS
ELECTRIC HEATING
AUTOMOBILES
START-UP
AIR POLLUTION CONTROL
HYDROCARBONS
CARBON MONOXIDE
NITROGEN OXIDES
DESIGN
FEDERAL TEST PROCEDURE
TEMPERATURE MONITORING
POWER SUPPLIES
PLATINUM
PALLADIUM
RHODIUM
EXPERIMENTAL DATA