After-treatment Improvement in Mahindra BS6.1 to BS6.2

Effective 1st April 2023, India's automotive emissions regulation has moved from BS6.1 to BS6.2 standard the after-treatment systems need to demonstrate robust performance not just on the cycle, but also to demonstrate emissions for on-road driving (RDEs) conditions. A stringent OBD strategy to monitor the real-time emission levels along with compliance On Road Driving Emissions (RDEs) are focus areas for BS6.2 emission legislation. The max speed on MIDC is 90km/h in BS6.1, DOC+SCRF® was meeting legislation at the lab and now with iRDE cycle max speed of the vehicles under M1 category will have the max permitted legal limit shall surpass 100 km/h for not greater than 3% of the time duration in the Phase-3 driving cycle for which max speed is up to 120 km/h. The monitoring window intended for BS6.2 with higher operating temperatures and higher space velocity plays a major role and adds a challenge to tackling the emission on the road. In this article, Mahindra and Johnson Matthey will share the strategy of EATS hardware configuration to add the underfloor passive SCR in addition to SCRF® to ensure the CF in OBD2 in RDE cycle architecture would be DOC+SCRF®+SCR and the results of work which developed RDE-compliant diesel engines and after-treatment robust solutions to meet the emissions requirement of BS6.2.