Measurement and comparison of Bangkok diesel bus emissions and performance using on-board equipment

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:351197

Burnette, A D; Kishan, S ^[1]; Wangwongwatana, S; Kangsapatparakul, C ^[2]

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1. Radian International, Austin, TX (United States)
2. Pollution Control Dept., Bangkok (Thailand)

An on-board measurement system was assembled and used to compare the emissions and performance of buses in Bangkok, Thailand under actual driving conditions. Three similar buses were compared: one using an engine without special emissions control design, one with an engine meeting Euro 1 standards, and one with an engine meeting Euro 2 standards. As the buses drove their routes, second-by-second data were collected for engine rpm, throttle position, vehicle speed, exhaust concentrations of hydrocarbons, carbon monoxide, carbon dioxide, oxygen, nitric oxide, and exhaust opacity. Vehicle performance data were calculated using algorithms developed during previous driving studies in Bangkok. Gram per liter of fuel used emission factors were developed for gaseous pollutants using combustion calculations and these were translated into gram per kilometer traveled emission factors using the fuel efficiency data for the buses. Smoke data were left in terms of opacity. Test results are designed to be used to compare the cost benefit of upgrading buses with no emissions controls to Euro 1 or Euro 2 technologies. Ongoing tests will help bus companies determine the benefit of incremental improvements to bus engines and other emissions reduction strategies.

• OSTI ID: 351197
• Report Number(s): CONF-970677--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
AIR POLLUTION MONITORING
AIR POLLUTION MONITORS
ALGORITHMS
BUSES
CARBON DIOXIDE
CARBON MONOXIDE
COST BENEFIT ANALYSIS
DIESEL FUELS
EXHAUST GASES
HYDROCARBONS
NITRIC OXIDE
PERFORMANCE
POLLUTION CONTROL EQUIPMENT
THAILAND