Passenger Cars :: Heavy Duty Vehicles :: Non-Road Applications :: Technical Papers

Diesel Particulate Filters:
Passenger Cars

Diesel engines are considered a popular alternative in passenger cars due to fuel efficiency and driving properties. This is realized by the strong sales of these vehicles for almost all major car manufactures world-wide. A major concern related to the increasing number of diesel vehicles is the particulate and NOx emissions which are significantly higher compared to gasoline engines equipped with Three Way Catalyst technology.
Highly efficient diesel particulate filters for exhaust systems in passenger cars

Based on its ceramic substrate technology, NGK has developed Diesel Particulate Filters (DPF) with various material characteristics:

  • Si-bonded Silicon Carbide (Si-SiC) DPF.
  • Cordierite DPF.

The know-how that NGK uses in processing ceramic substrates allows the development and the variation of pore structures that can be adapted. Si-SiC has excellent characteristics for DPF with fuel additive system because of its higher thermal shock resistance property. Si-SiC also has excellent performance for catalyzed DPF system because of it's flexible porosity and pore size control to achieve low pressure drop performance. Cordierite DPF has greater potential in applying high porosity. This high porosity filter material can be coated with a high amount of washcoat and produce low pressure drop. Under certain engine management conditions, cordierite DPF is also a good candidate for passenger car applications.
 
 
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