John Deere Power Systems' (JDPS) PowerTech PVX 6.8L above 130 kW (174 hp) and its PowerTech PSX 6.8L engines have been certified by the EPA and European Union (EU) as compliant with the Interim Tier 4 and Stage III B regulations. The PowerTech PSX and PVX 6.8L engines join the certified 9.0L engine models.
- Engine platform includes cooled exhaust gas recirculation (EGR) for NOx control, and an exhaust filter for reducing PM
- Full-authority electronic controls
- 4-valve cylinder head
- High-pressure fuel system
- Single variable geometry or series turbocharging
- Air-to-air aftercooling system
The certified PowerTech PVX 6.8L offers a power range of 138 – 187 kW (185 – 250 hp), while the PowerTech PSX 6.8L offers 168 – 224 kW (225 - 300 hp).
Interim Tier 4/Stage III B emissions regulations begin January 1, 2011, for 130 kW (174 hp) and above engines and require a 90% reduction in diesel particulate matter (PM) and a 50% reduction in nitrogen oxide (NOx) from previous Tier 3/Stage III A requirements.
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