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When the FBC additive, was used in conjunction with a cDPF, regeneration intervals increased, demonstrating that the FBC can also enhance regeneration alongside a catalysed filter.


FBC: Faster active regeneration at lower temperatures


In addition, the study revealed that it is possible to gain more than 2% total fuel consumption savings with the FBC-DPF set up compared to the cDPF, since there is significant reduction in the fuel consumption penalty from regeneration (reduced temperature, time and frequency) and DPF porosity (lower inherent backpressure with bare DPF).


NOx aftertreatment compatibility The benefit of FBC use has also been established in Euro 6 engines, where tighter NOx emissions limits must be met. These lower NOx emission limits will be introduced to India in BS-VI, which means OEMs will need to introduce NOx aftertreatment technology, such as selective catalytic reduction (SCR), into their vehicles.


India NOx limits


The Infineum FBC enables Indian vehicle OEMs to provide their customers with a more robust regeneration strategy, suitable for city driving conditions, and offers an increased level of flexibility when designing Bharat VI engines and aftertreatment systems.


Passive regeneration’s dependence on NOx concentration can put restrictions on aftertreatment configuration in that a cDPF must be placed upstream of any NOx abatement technology. Because the Infineum FBC additive uses oxygen rather than NOx to enable regeneration it is fully compatible with a range of NOx reduction systems.


Since engine-out soot emissions are also lowered by the FBC, there is less risk of ‘face-plugging’, due to the build-up of soot on the front face of the catalyst substrate. Additionally, the potential to use higher exhaust gas recirculation (EGR) rates provides an opportunity to use a smaller NOx aftertreatment catalyst, providing benefits for aftertreatment system packaging where space is limited.


LINK www.infineum.com


16


LUBE MAGAZINE NO.148 DECEMBER 2018


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