Back-pressure. Within the test cell, baseline engine back-pressure will be set to the value required by the applicable FTP (highway or nonroad). Once retrofit control technology is installed for the ETV test, the resulting back-pressure may be greater than the FTP requirement. If so, the ETV test will be conducted without adding additional back-pressure; if not, the test cell will be adjusted to meet the FTP requirements. Because back-pressure of a retrofit control technology may affect the performance of an engine, the ETV test will measure and report back-pressure with the control system at full load and rated speed. Back-pressure will be measured and reported for both the baseline engine (as set for the FTP test without the technology installed) and the engine with the degreened or aged control technology installed.
Appears in 2 contracts
Sources: Cooperative Agreement, Cooperative Agreement