Physics Based Smoke Limitation Using Vehicle Mass Moment of Inertia

摘要

The purpose of this invention is to help limit fueling during specific driving maneuvers to prevent the combustion system from getting too rich and causing excessive soot production that can lead to power limitation for customers. Heavy duty boosted diesel engines are susceptible to busy foot drivers that can cause soot production to increase rapidly versus a stable pedal driver over a given drive cycle. The combination of large turbos and busy foot driving causes boost deviations as the system is building pressure. The lack of air causes the system to become rich and creates the increased soot. This increase in soot production can put drivers in a power reduced mode. This invention would use mass moment of inertia, vehicle speed and/or grade to implement a correction to the fueling/smoke limitation. This would allow the calibration to be more flexible to limit smoke build up in DPF's rapidly without a degradation of vehicle performance. This could reduce or eliminate warranty and improve customer satisfaction. Conversely, it could be relaxed to keep/improve performance on 0-60 mph, passing maneuvers, uphill towing, etc.