Not known Facts About DPF
If the gas injectors malfunction, they supply excessive diesel gas in to the gas mixture. The result is really an too much technology of soot which will sooner or later clog the filters and block the DPF.
If you are contemplating a DPF delete kit or want to boost your car having a higher-performance DPF, It is really important to comprehend the implications and legal criteria.
Be aware that unlike a spark-ignited motor, which typically has below 0.5% oxygen inside the exhaust fuel stream ahead of the emission Manage product(s), diesel engines have a really high ratio of oxygen offered. While the amount of offered oxygen would make speedy regeneration of a filter achievable, In addition, it contributes to runaway regeneration complications.
しかし、資源の有効活用という意味で、ディーゼル・エンジンを完全に排除してしまうことは現実的ではありません。バスやトラックなど質量の大きいクルマの動力源として最適な特性を持っていることと、輸入した原油の有効活用が、その理由です。
The major disadvantage is cordierite has a comparatively reduced melting place (about 1200 °C) and cordierite substrates happen to be known to soften for the duration of filter regeneration. This is usually an issue If your filter happens to be loaded additional seriously than regular, and is a lot more of a problem with passive systems than with Energetic units, Except if You will find a program breakdown.[two][32]
Even so, not all motorists do this kind of driving consistently – which is why companies have made an alternative type of regeneration.
DPF's Procedure is its capability to trap soot particles, which are a standard byproduct of diesel combustion. These particulate issues are hazardous for the atmosphere and human health, earning their seize essential.
Energetic Regeneration is initiated from the car or truck's Management method when it detects which the DPF is starting to become clogged with soot. The vehicle will regulate its engine and fuel injection timings to raise the exhaust temperature and initiate soot burn up-off.
Another signal of a clogged DPF is an increase in the level of smoke coming in the exhaust. Even though diesel engines may perhaps Obviously emit more noticeable exhaust than gasoline engines, a unexpected enhance or improve in the color in the exhaust smoke can point out that the DPF is just not filtering particulates successfully.
As talked about above, the strain differential sensor is defective, misreading the level of backpressure in between the front and rear in the DPF. The saturation degree is only ten%, still the sensor calculates fifty% = video game around until eventually the sensor is changed.
This can be accomplished both passively (through the motor's exhaust warmth in normal operation or by including a catalyst for the filter) or actively introducing really substantial warmth to the exhaust technique. On-board Lively filter management can use a number of tactics:[nine]
Compliance with DPF Delete Rules: A lot of areas have demanding emissions needs, and utilizing a DPF very clear-out assures that cars fulfill these regulatory prerequisites, heading off possible fines and consequences.
Active Regeneration is initiated from the motor vehicle's Handle process when sensors detect an too much build-up of soot.
しかし、実際に排気ガス成分が規制されたのはガソリン・エンジンだけで、ディーゼル・エンジンは長年にわたって「野放し」に近い状態。当時の技術レベルでは規制値をクリアすることが技術的に困難だったこと、貨物輸送の主体がトラックに移行しつつある時期であり、運輸業界が猛烈なロビー活動を行ったことなどが原因とされている。