Volvo Penta Tier 4 Final engines utilize selective catalytic reduction to reduce NOx and PM emissions without requiring a diesel particulate filter.
- Diesel exhaust fluid reacts with NOx in the catalytic converter to turn it into nitrogen and water
- Light exhaust gas recirculation (light EGR) lowers peak combustion temperature
- Engine platforms consist of 5- to 16-liter, four- or six-cylinder models ranging from 143 to 700 hp
- Extended oil change intervals of as much as 1,000 hours
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