Development of Common Rail Engine for LCV BS III and a Step Towards BS IV Emission Compliance 2011-26-0032
This work discusses about the emission development of a 4 cylinder inline 3.3 liter CRDe to meet BS III emission norms applicable to 3.5 Ton and above category and upgradable to BS IV emission by suitable after treatment.
This engine is developed from a 3.2l mechanical pump engine. During development the focus was on the usage of higher swept volume, selection of engine hardware like piston bowl, turbocharger, injectors and optimization of the injection parameters.
A cost-effective solution for meeting the BS III norms in the LCV category without application of EGR and exhaust after treatment even though there is 15% increase of the power rating and 10% increase in Peak torque of the engine. Injection parameters like injection timing, injection quantity and pilot injection were optimized to meet the emission target.
Analytical learning from the BS III achievement were further enhanced by use of the EGR / EGR cooler, which gave subsequent reduction in the NOx, further application of the Partial flow filters gave a road map for BS IV emission compliance, the emission strategy adaptation for achieving the LCV BS IV emission compliance will also be discussed.