Examination of charge dilution with EGR to reduce NO{sub x} emissions from a natural gas-fuelled 16 valve DOHC four-cylinder engine

Journal Article · Sat Oct 01 04:00:00 EDT 1994 · SAE Special Publication

OSTI ID:81675

Jaeaeskelaeinen, H E; Wallace, J S

Charge dilution is commonly used to reduce emissions of nitrogen oxides (NO{sub x}) from internal combustion engine exhaust gas. The question of whether to use air or exhaust gas recirculation (EGR) as a charge diluent for the natural gas-fuelled test engine is addressed first. The decision to use EGR is based on the potentially lower NO{sub x} and unburned hydrocarbon emissions that could be achieved if a three-way catalyst were applied to the engine. The effect of EGR on the spark advance for maximum brake torque (MBT), NO{sub x}, and unburned hydrocarbon emissions is then examined in detail. The effect on fuel efficiency is discussed briefly. 37 refs., 16 figs., 3 tabs.

• OSTI ID: 81675
• Report Number(s): CONF-9410173--
• Journal Information: SAE Special Publication, Journal Name: SAE Special Publication Journal Issue: 1052; ISSN SAESA2
• Country of Publication: United States
• Language: English

Related Subjects

29 ENERGY PLANNING, POLICY, AND ECONOMY
33 ADVANCED PROPULSION SYSTEMS
AIR POLLUTION CONTROL
EXHAUST GASES
FUEL CONSUMPTION
FUEL SUBSTITUTION
HYDROCARBONS
NATURAL GAS
NITROGEN OXIDES
NUMERICAL DATA
SPARK IGNITION ENGINES
TESTING