Caterpillar 3406 spark-ignited natural-gas-engine emissions on EPA (Environmental Protection Agency) heavy-duty transient test cycle. Topical report, March-December 1988

Technical Report · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5423183

Waldman, D J; Gladden, J R; Endicott, D L; Cull, B A

The emissions of a lean-burn natural-gas-fueled 3406 spark-ignited engine were determined on the EPA transient emission cycle for heavy-duty vehicle engines. The engine was rated at 350 hp at 1800 rpm. The engine was a minimally modified generator-set engine developed under the same GRI contract and was not optimized for truck applications or transient emissions. Transient emissions in g/hp-hr were 4.1 NOx, 9.2 total hydrocarbons, 0.84 non-methane hydrocarbons, 3.2 CO, 0.42 aldehydes, and 0.60 particulates. Steady-state emissions were also measured. The results indicate lean-burn spark-ignited engine technology is a promising approach to meeting 1994 EPA truck-engine-emission standards. NOx and CO standards can be readily met. Hydrocarbon emissions exceed the standard in the engine as presently configured but are believed to be controllable by improved air/fuel ratio control, combustion-system modification and/or an oxidation catalyst. The particulates were primarily from the lubricating oil and should be controllable with piston ring and valve-seal improvements and/or an oxidation catalyst.

• Research Organization: Caterpillar, Inc., Peoria, IL (USA)
• OSTI ID: 5423183
• Report Number(s): PB-89-231575/XAB
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330700 -- Advanced Propulsion Systems-- Emission Control
330800* -- Emission Control-- Alternative Fuels
AIR POLLUTION
AIR POLLUTION CONTROL
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COMBUSTION PRODUCTS
CONTROL
DOCUMENT TYPES
EMISSION
ENERGY SOURCES
ENGINES
EXHAUST GASES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
NATURAL GAS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
POLLUTION
POLLUTION CONTROL
PROGRESS REPORT
SPARK IGNITION ENGINES
STANDARDS
TESTING
TRUCKS
VEHICLES
WASTES