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Two pollution tests must for vehicles with flex fuel option


All bi-fuel vehicles with flex fuel option will have to undergo tests for both gaseous pollutants as well as particulate mass and number when seeking vehicle type approval under BS VI emission norms. However, hydrogen-run vehicles will have to undergo tests only for emissions of nitrogen oxide, the ministry of road transport and highways said in a notification on applicability of test requirements for type approvals.

According to the notification, particulate mass and number limits for vehicles with positive ignition engines including hybrids will apply only to vehicles with direct injection engines.

“Further, vehicles fuelled with biodiesel blends up to 7% will be tested with reference to diesel (B7) and vehicles fuelled with biodiesel blends above 7% will be tested with respective blends,” it said.

The ministry has given manufacturers the option to select either E10 (petrol blended with 10% ethanol) or E20 (petrol blended with 20% ethanol) as fuel for type approval and conformity of production tests.

As per the notification, the conformity of production period for each vehicle model including its variants will be once a year and at least 50% of vehicle models, rounded to nearest integer value, produced from a particular plant per year will be selected randomly from dealer locations or warehouses for tests.

The notification said the exhaust gas sampling for the vehicle under test should start at the intimation of the engine start up procedure and that the driving cycle will be at a maximum speed of 90km per hour.


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