Equipment Type

Top 100: Un-EGR Needs No Plumbing

Mack split the truck market into highway and vocational segments when they evolved the E-Tech E7 into the ASET engines with a different kind of exhaust-gas recirculation (EGR) for each segment. All 16 ASET configurations work from a six-cylinder, 12-liter platform. Mack developed simpler internal-EGR for DM, RD, and Granite trucks. It uses electronic control and fancy valve work to blend some exhaust with intake air inside the engine.

December 01, 2002

Mack ASET diesel engineMack split the truck market into highway and vocational segments when they evolved the E-Tech E7 into the ASET engines with a different kind of exhaust-gas recirculation (EGR) for each segment. All 16 ASET configurations work from a six-cylinder, 12-liter platform. Mack developed simpler internal-EGR for DM, RD, and Granite trucks. It uses electronic control and fancy valve work to blend some exhaust with intake air inside the engine. There are eight internal-EGR configurations with ratings from 300 to 460 horsepower, and torque ranges from 1,200 to 1,560 foot-pounds. Vision trucks and road tractors get a variable-geometry turbocharger with cooled EGR. They range from 310 horsepower and 1,360 foot pounds of torque to 460 horsepower with 1,660 foot-pounds of torque. The internal-EGR engines cost $3,300 more, and the cooled-EGR ASET engine costs $5,100 more than their E-Tech predecessors.

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