What are the reasons for frequent DPF regeneration?
2 Answers
There are three main reasons for frequent DPF regeneration. Below are the detailed explanations: 1. Use of low-quality gasoline: Inferior gasoline contains a large amount of impurities and carbon compounds, which leads to increased particulate matter in the vehicle's exhaust, making the DPF more prone to clogging. 2. Not using low-ash engine oil: Low-ash engine oil contains fewer impurities and is more suitable for use in China VI vehicles. Failure to use low-ash engine oil increases the likelihood of DPF clogging. 3. Long-term low-speed driving: Driving at low speeds reduces the fuel combustion efficiency of the vehicle, resulting in an increase in fine particles in the exhaust.
Recently, my diesel car keeps showing regeneration prompts. After researching, I've summarized a few key points. Frequent short-distance driving is particularly prone to triggering regeneration – commuting less than 20 kilometers means the engine doesn't fully warm up before stopping, causing particulate matter to accumulate rapidly. Using inappropriate engine oil also adds burden, where low-ash oil is the correct choice. Fuel quality is a hidden killer; diesel from small gas stations with high sulfur content leaves stubborn ash deposits in the DPF that can't be cleaned out. Additionally, during traffic jams, the exhaust temperature doesn't rise enough, making passive regeneration practically useless. Now, I make time to drive on the highway for half an hour each week to get the exhaust temperature above 300 degrees, which has significantly improved the situation. Underinflated tires increasing fuel consumption can indirectly lead to more frequent regenerations, a point many people easily overlook.
