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Diesel Engine Consent Decree: In-Use Test Program
Six companies (Detroit Diesel, Caterpillar, Cummins, Mack, Renault, and Volvo) are required to conduct an In-use Test Program to ensure diesel engines manufactured or modified by them meet the requirements of the Consent Decrees when driven under conditions which can reasonably be expected to be encountered during normal vehicle operation and use, and to evaluate the effectiveness of modifications to engine design made in response to the requirements of the Consent Decrees in reducing emissions. Specifically, each manufacturer will conduct testing to assess in-use mobile monitoring technologies, establish calibration and operating procedures for selected monitoring technologies, establish a baseline emission characterization, and conduct on-road testing to monitor in-use compliance on representative Heavy Duty engines it manufactures. The six companies are working together on this project with the University of West Virginia. Navistar will contribute $350,000 to the in-use test program conducted by the other manufacturers. Including Navistar's contribution, the total funding for the In-Use Test Program is $7,500,000.
The In-use Test Program consists of four phases. In Phase I, each manufacturer is required to conduct engineering studies to determine the correlation, accuracy, precision, and repeatability of existing mobile monitoring technologies. In Phase II, each manufacturer is required to develop in-use testing procedures, based on testing of HDDEs engaged in a variety of typical on-road missions, to be used in connection with Phases III and IV. In Phase III each manufacturer must conduct emissions testing on a variety of its in-service diesel engines (pre-model year 2000) to characterize real world emissions from such diesel engines. In Phase IV, each manufacturer must conduct on-road compliance monitoring on its Heavy Duty engines using the monitoring technology and previously defined testing procedures and driving routes approved pursuant to Phases I and II. A minimum of 60% of the total In-use Test Program funds will be spent on Phase IV.
In-Use Test Program Reports
- Phase I Report (PDF) (2 MB, About PDF)
- Phase II Report (PDF) (2 MB, About PDF)
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