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Legend

  • PM Particulate Matter
  • HC Unburnt Hydrocarbons
  • NOx Nitrogen Oxides
  • CO Carbon Monoxide
  • N2 Nitrogen
  • CO2 Carbon Dioxide
  • H2O Water

*AdBlue® / DEF = CO(NH2)2 + H2O

  • 1
    DIESEL OXIDATION CATALYST

    NO → NO2
    HC, CO and PM oxidation

    1
  • 2
    DIESEL PARTICULATE FILTER

    PM oxidation with NO2

    2
  • 3
    AdBlue® / DEF INJECTION

    Hydrolysis → NH3+CO2

    3
  • 4
    SELECTIVE CATALYTIC REDUCTION

    NO and NO2 reduction by NH3 to N2 and H2O

    4
  • 5
    CLEAN-UP CATALYST

    Residual NH3 oxidation

    5

FPT Industrial engines for on-road applications achieve Euro VI emission levels with our exclusive, patented HI-eSCR system.

Thanks to continuous R&D, we have enhanced SCR technology (Selective Catalyst Reduction), that transforms NOx into nitrogen (N2) and water (H2O) by injecting Urea in the exhaust pipe. This allowed us to develop a no-EGR solution, based on optimized combustion​ and very high NOx-conversion efficiency (95-98% versus 80-85% of competitors’ average).

Patented HI-eSCR features include an exclusive Urea dosing control system (based on a network of integrated sensors that monitor any excess in NOx and Ammonia) and a thermally-insulated high-turbulence mixer, that allow homogeneous urea hydrolysis and full emission compliance.

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PRODUCTIVITY AND EFFICIENCY
NOx abatement is provided by SCR only. This ensures more simplicity, no additional encumbrance, less energy dispersion, and easier servicing. Optimized temperature in the combustion chamber reduces fuel consumption and particulate generation, so lowering emissions without efficiency loss. Excellent transient response also maximizes productivity. No forced/parked regeneration avoids downtime.


MAINTENANCE
HI-eSCR is a EGR free solution that provides top-class vehicle uptime. Low PM rate makes DPF passive regeneration enough, and this eliminates active and forced/parked regeneration temperature peaks and the consequent danger of fire. Low wear and best in class maintenance intervals (up to 600.000 km s, depending on the ​​mission) also reduce operating costs.


RELIABILITY
HI-eSCR is a breakthrough FPT Industrial technology (based on more than 10 years experience in the SCR field) whose reliability is demonstrated by over 650,000 units produced to date. System simplification (no EGR / no forced regeneration) also minimize technical stops and improves durability.

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COMPACTNESS
No EGR and passive DPF mean reduced after-treatment system size, no increase in cooling requirements and low impact on vehicle architecture. This allows the use of existing body-in-whites (with considerable cost savings) and makes engine installation and maintenance easier.


Supporting materials

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