Potential impacts of DPF

When exploring the cleaning process of DPF particulate filters, we also need to pay attention to the possible side effects or potential impacts they may bring. These impacts may involve multiple aspects such as environment, equipment performance, and long-term usage effects. By gaining a deeper understanding of these potential impacts, we can more comprehensively evaluate the pros and cons of the DPF cleaning process and develop more reasonable maintenance strategies.

When the engine is running, the fuel is fully burned in the cylinder, and the expanding gas produced pushes the piston downwards to the bottom dead center. This process is called the "power stroke". Subsequently, the exhaust valve opens to release the exhaust gas after combustion. However, when the back pressure of the tailpipe increases, that is, the resistance to exhaust emissions increases, the engine needs to consume more energy to overcome this resistance. Even worse, if the exhaust pipe is completely blocked, the engine may even "strike" and fail to function properly. In addition, in order to achieve active regeneration, the engine requires additional energy input, such as post injection, exhaust pipe hydrocarbon injection, or electric heating regeneration measures. Through theoretical analysis, we can roughly estimate the impact of these additional operations on fuel consumption.

For example, based on empirical data, we can know that for every 1 kPa increase in back pressure, fuel consumption will correspondingly increase by 0.02 to 0.04 liters per 100 kilometers. Usually, active regeneration of the engine is triggered when the back pressure reaches 7 to 10 kilopascals. Before the start of this regeneration process, fuel consumption may have increased by 0.2 to 0.4 liters per 100 kilometers.