Cooperative evaluation of techniques for measuring hydrocarbons in diesel exhaust. Phase IV: 1972-1973

Technical Report · Sat Nov 01 04:00:00 EST 1975

OSTI ID:6748513

In 1972 and 1973 a program to evaluate techniques for measuring the concentration of hydrocarbons in diesel exhaust was carried out. In the first two programs, conducted in 1967 and 1968, a single cylinder diesel engine was shipped to 13 laboratories and each laboratory measured hydrocarbon emissions by their own method. Agreement among laboratories (instruments) was poor in both programs. In the third program, conducted in 1970 at one laboratory on one engine, agreement among instruments was much improved from the earlier programs. The fourth program was conducted to confirm these later results. In it, a multi-cylinder diesel generating set was circulated among 15 participating laboratories, and each laboratory measured exhaust hydrocarbons by methods that complied with the SAE Recommended Practice J215, Continuous Hydrocarbon Analysis of Diesel Exhaust. They also measured hydrocarbon concentrations of two bottled gases having unknown compositions. Analyses were fairly consistent within laboratories both on bottled gases and engine exhaust; the standard deviations were 3% and 10% of the grand averages, respectively. However, analyses differed substantially among laboratories both on bottled gases and engine exhaust; the standard deviations were about 10% and 22% of the grand averages, respectively. These results scattered more than the desirable amount for engineering measurements, and they indicated that further improvement is needed in techniques for analyzing hydrocarbons in diesel exhaust.

• Research Organization: Coordinating Research Council, Inc., New York (USA)
• OSTI ID: 6748513
• Report Number(s): CRC-Report-471
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
330704 -- Emission Control-- Hydrocarbons
ACCURACY
AIR POLLUTION CONTROL
AUTOMOBILES
DIESEL ENGINES
ENGINES
EXHAUST GASES
FLUIDS
GAS ANALYSIS
GASEOUS WASTES
GASES
HEAT ENGINES
HYDROCARBONS
INTERNAL COMBUSTION ENGINES
MEASURING METHODS
ORGANIC COMPOUNDS
POLLUTION CONTROL
RELIABILITY
VEHICLES
WASTES