The Fast Burn with Heavy EGR, New Approach for Low NOx and Improved Fuel Economy 780006

In the way to seek a marked reduction of NOx just by EGR which was proved to be the best answer from the past studies, this analytical study deals with combustion around the practical engine stability limit.
The results show that practical engine operating stability limit with the four cylinder engine is determined by the occurrence of several percent of slow burn.
Experiments applying short combustion duration (fast burn) showed that the fast burn in combination with heavy EGR improves engine stability and has a potential to achieve substantial reduction in NOx emission along with some improvement in fuel economy. This potential was also directed by mathematical model study.
This fast burn concept was embodied in the newly developed Nissan Z Fast Burn Engine.


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