Executive order
D-393-3
Johnson Matthey, Inc.
Vehicle applications
No vehicle applications were preserved for this order.
Part records
| Part number | Model/specification | Modification | Remarks |
|---|---|---|---|
| 1991-2001 model-year Caterpillar 3208, 3116, 3126, 3306, 3406, C10, C12, C15, and C16 heavy-duty diesel engines | This exemption applies to 1991-2001 model-year 4-stroke engines originally certified to meet a particulate matter emission standard of 0.10 g/bhp-hr or lower. | This exemption is valid provided the engines meet the following operating conditions: (1) engine exhaust temperature is greater than or equal to 275 degrees Celsius for 40-50 percent of the duty cycle; (2) NOx to PM ratio is at least 8; and (3) engine is operated using diesel fuel with a maximum sulfur content of 50 parts per million by weight. |