Peterbilt Motors Company announced it will offer the Cummins Westport ISX12 G engine starting next year. The engine will be rated up to 400 horsepower and 1,450 pounds of torque. It features spark ignition technology and a 3-way catalyst and can be configured with an LNG or CNG fuel system.
Peterbilt currently offers two natural gas engine platforms for the market. The first engine is the Cummins Westport 8.9 liter ISL G with 320 horsepower at 1,000 pounds of torque. It features spark ignition and a 3-way catalyst emission system that can be configured with either LNG or CNG fuel systems. The second platform is the Westport HD 15-liter engine with 475 horsepower and 1,750 pounds of torque and diesel pilot ignition, which is configured for the LNG fuel system only.