HOS conflicts

| December 15, 2005

The new family of engines will be easily adaptable to selective catalytic reduction in 2010 if Volvo opts for that technology, Karlsten said.

Tens of thousands of Volvo trucks already use EGR systems. Volvo’s 2007 engines will use a higher rate of EGR to lower nitrogen oxide emissions and particulate filters. All Volvo’s 2007 engines will use the ultra-low sulfur diesel fuel that was mandated by the federal government to be available in the second half of 2006.

The service interval for the 2007 diesel particulate filters is expected to be 150,000 miles or, on average, about a year and a half, with a cleaning cost at each interval of about $150, Karlsten said. Volvo will install warning lamps to let drivers know when the filter needs servicing, Karlsten said.

“We are where we need to be with our testing and development to ensure that our customers receive engines with the performance, fuel economy and reliability they demand from Volvo,” Karlsten said.

Other features of Volvo’s 2007 engines include:

  • Advanced, high-pressure fuel injection with multiple injections per stroke.

  • Increased peak cylinder pressures.
  • Single-stage variable geometry turbocharger.
  • Reinforced base components to handle internal loads.
  • High-capacity cooling system fully integrated into Volvo truck design.
  • Advanced centrifugal crankcase ventilation.

The current Volvo D16 is the first engine to use such architecture. The new family of engines will have the same level of fuel economy as the Volvo D12, Karlsten said.

The new family of engines will be built at the Volvo Powertrain North America plant in Hagerstown, Md.
-Randy Grider


Mack Introduces New Tractor
and Engine Mack Trucks unveiled a new flagship highway tractor called Pinnacle and new models of its Granite and Granite Axle Back construction vehicles. The announcement was made at the company’s national sales meeting in Las Vegas in October.

The truck maker also unveiled the MP7 engine, the first in a new Mack Power family of engines based on the same architecture as the one that will be used to meet the 2007 U.S. emissions regulations. Mack said customers in both highway and vocational applications can expect a significant improvement in fuel economy in the MP7 compared to current engines.

“This is truly the start of a new era for Mack,” said Paul Vikner, Mack president and CEO. “The new products that we’re debuting today directly respond to our customers’ requirements and represent the combining of our heritage of reliability and durability with the latest in breakthrough technology.”

Available in the initial offerings of both the Pinnacle and the new Granite, the MP7 is an 11-liter engine available in the three Mack engine families – Econodyne, Maxidyne and MaxiCruise – in six horsepower ratings between 325 hp and 405 hp, with torque ranging from 1260 pounds-feet to 1560 pounds-feet.

The MP7 engine’s key components include:

  • High-performance (cooled) exhaust gas recirculation system (HEGR)

  • Variable geometry turbocharger (VGT) with sliding nozzle ring
  • Electronically controlled unit injectors
  • Single overhead cam with four valves per cylinder
  • Wet sleeve cylinders with single-piece steel pistons
  • Rear gear train that offers a simple REPTO option.

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