Indian Exhaust Emission Standards

Indian emissions legislation requires as of April 2010 the installation of exhaust-gas aftertreatment systems in motor vehicles in use in the National Capital Region (Delhi) and 12 mega cities, with the same restrictions being applied nationwide as likely 2014/2015. This will affect all 3- and 4-wheelers as well as trucks and buses.

The implementation schedule of emission standards

3-Wheelers (BS II to BS III)

3-Wheelers (BS II to BS III)

  • Nationwide since 2010
4-Wheelers < 3.5t (BS III to BS IV)

4-Wheelers < 3.5t (BS III to BS IV)

  • National Capital Region (Delhi) and 12 mega cities since 2010
  • Nationwide likely 2014/2015
Trucks and Buses (BS III to BS IV) (LCV and HCV > 3.5t)

Trucks and Buses (BS III to BS IV)
(LCV and HCV > 3.5t)

  • National Capital Region (Delhi) and 12 mega cities since 2010
  • Nationwide likely 2014/2015

The Solution: technologies intelligently linked

The strict particulate limit for Light (LCV) and Heavy Commercial Vehicles (HCV) of 0.020 g/kWh, together with the NOX level of 3.5 g/kWh for commercial vehicles that came into force in April 2010 and will be extended nationwide likely 2014/2015 at the latest, can already be met today by two technologies.

  • EGR + DOC + DPF can be applied to existing engines with low-cost mechanical fuel injection or common rail systems.
  • DOC + SCR requires new engines with common rail injection, which allows high peak in-cylinder pressure, to achieve the benefit of better fuel consumption.

EGR – Exhaust Gas Recirculation      DPF – Diesel Particulate Filter
DOC – Diesel Oxidation Catalyst       SCR – Selective Catalytic Reduction

SMF with passive regeneration
SMF with passive regeneration
HJS Partial Flow SMF-Module
HJS Partial Flow SMF-Module

The hot exhaust gases from the engine – which contain soot particles – pass through the DOC, enter the filter housing and pass through the sintered metal filter (SMF®). The gaseous components flow in part through the microscopic pores of the filter pockets; the soot particles are trapped on the surface and deposited in the individual filter pockets. The rest of the exhaust-gas flow exits the partial-flow filter through the overflow area.

Engine dyno test bench results

The table and graph contain actual test bench results measured using the European Stationary Cycle (ESC) and European Transient Cycle (ETC). The measurements show that not only the limits laid down in BS IV can be met by using the HJS Partial-Flow SMF® but that the engineering target, which includes deterioration factors, is achieved.

Flexible solutions for different diesel engine applications

The core of all HJS exhaust treatment systems is the sintered metal filter (SMF®), with which HJS has set new standards in the marketplace.
Thanks to their modular design, sintered metal filters (SMF®) can be used in various exhaust systems and versions for different applications.

Advantages of HJS Partial Flow Filter

HJS Diesel particulate filter
  • Metallic durable filter module
  • Adjustable filtration efficiency between 30 – 70%
  • Continuous passive regeneration by NO2 through upstream diesel oxidation catalyst
  • Open filter concept guarantees long life performance without any cleaning regarding lubricant oil ash
  • Flexible solutions for different applications
  • Blockage of the filter on basis of this Bypass Concept is not possible
  • Pressure drop can independently on filtration efficiency adjusted by
  • Increase of filtration surface
  • Increase of bypass overflow area   |   |   |   |   |