Executive order
D-393-14
Johnson Matthey, Inc.
Vehicle applications
No vehicle applications were preserved for this order.
Part records
| Part number | Model/specification | Modification | Remarks |
|---|---|---|---|
| 1991-2004 model-year 4-stroke heavy-duty diesel engines originally certified to meet a particulate matter emission standard of 0.10 g/bhp-hr or lower. This exemption includes engines originally certified to meet a non-methane hydrocarbons plus oxides of nitrogen emission standard of 2.4 g/bhp-hr or higher. This exemption excludes all engines equipped with an aftertreatment emission control system such as a catalytic converter or a diesel particulate filter. This exemption also excludes engines equipped with an exhaust gas recirculation system with the following exceptions: 2003 model-year Cummins 5.9 liter ISB engines and 2003 model-year Cummins 10.8 liter ISM engines. | This exemption is only valid provided the engines meet the following operating conditions: (1) the engine exhaust temperature is greater than or equal to 240 degrees Celsius for at least 40 percent of the typical duty cycle, (2) the NOx to PM ratio is at least 8, and (3) the engine is operated using diesel with a maximum sulfur content of 50 ppmw. |