Cooperative Study of Heavy Duty Diesel Emission Measurement Methods

J. M. Perez; W. B. Clemmens; L. C. Broering; John H. Johnson

doi:10.4271/780112

1978-02-01

Cooperative Study of Heavy Duty Diesel Emission Measurement Methods 780112

A cooperative test program was conducted by the CRC-APRAC CAPI-1-64 Composition of Diesel Exhaust Program Group to evaluate the technical aspects of a proposed EPA recommended Heavy Duty Diesel Emission Measurement and Test Procedure. The proposed changes affected the sampling configurations and the types of instruments used.

Six participants studied the effects of a number of variables on the proposed changes and evaluated some alternative systems that included both CHEMI and NDIR instruments. The tests were conducted at one site using a multi-cylinder engine operating on the 13-Mode Cycle.

Equivalency of systems was demonstrated and the best performance was obtained with a special NDIR system.

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Cooperative Study of Heavy Duty Diesel Emission Measurement Methods 780112

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