Durability. Durability is the over the service life of the engine without significant deterioration. To Degreening may occur in a laboratory or during in-use field operations on an engine that is equivalent to the proposed ETV test ability of the control system to function measure durability, a control system is aged by subjecting it to operating conditions that cause normal wear equivalent to 100 percent of the Minimum Durability Demonstration Period. Table 2 provides the demonstration periods that were current as of the date of this protocol. The applicant should verify that the durability period is current at the date of the verification. For participation in the VDRP, additional testing of an aged control system is required by EPA- OTAQ. If performed as part of the ETV program, the aged system test will meet the same data requirements as a new system test. The aging process details are not part of this protocol. Provided for information only, the description below is current as of April 2002 and may change. The details should be confirmed prior to ETV. The technology applicants must conduct the aging process on their technology. They have discretion to tailor this process to product requirements. It is expected that applicants will submit identical parts (one in a degreened state, one aged to 100 percent demonstration period) so that testing with one baseline may occur sequentially. However, applicants may conduct the degreened and aged technology tests as separate tests, in which case the baseline engine test must be repeated. All aging protocols must accompany the ETV application and explain the technical basis for stating the aging protocol results in 100 percent demonstration period aging. If real world aging is performed, the application must describe and provide documentation of the usage and maintenance history of the aged unit as well as the engine with which it was aged.
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Sources: Cooperative Agreement, Cooperative Agreement