Cummins will use cooled exhaust gas recirculation (EGR) technology and add exhaust aftertreatment with an integrated diesel particulate filter (DPF) and a crankcase ventilation system. This will be used on all its on-highway diesel engines for North America.
“Our 2007 field testing is well ahead of schedule. Tests have been jointly conducted with OEMs and end customers, so we are able to validate performance of the entire system in real-world conditions and duty cycles,” said Ed Pence, vice president and general manager of Cummins’ Heavy-Duty Engine Business.
The entire line features integrated electronic controls, with a single electronic control module that controls the engine and aftertreatment. All engines will use a sliding-nozzle variable geometry turbocharger (VGT), which features a new electric actuator for 2007 for fast response and precision airflow to the engine.
The DPF includes a diesel oxidation catalyst (DOC) to reduce particulate matter by 90 percent. According to Cummins, the DOC fully optimizes the regeneration capability of the particulate filter. The crankcase ventilation system uses a Fleetguard coalescing filter to capture crankcase emissions and return oil directly to the sump.
The company also announced that its medium-duty on-highway engines, the ISL, ISC and ISB, will use similar control technology to meet the 2007 emissions standards.
Jeff Weikert, Cummins 2007 MidRange program leader, said, “Our 2007 midrange and heavy-duty field test units have already completed over 2.5 million miles in field testing that encompasses all altitudes, temperatures and conditions, and over 20,000 abusive test cell hours. We believe customers will really like the increased performance of these engines.”
The ISB for 2007 will see displacement increase from 5.9 L to 6.7 L for more horsepower and torque and, more importantly. An automatic oil level sensor option eliminates the need for daily oil level checks. And, a new 18-quart oil pan option allows for standard oil drain intervals to be increased to 20,000 miles. The ISL and ISC both offer an optional compression brake.
Top horsepower/torque ratings for 2007 are: ISL 365/1250, ISC 330/1000 and ISB 325/750. Fuel consumption and maintenance intervals are unchanged.
