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What is the problem with smoke when DPF first parked in the car
As our national emission regulations are to be upgraded to the national standard stage, the installation of diesel particulate traps (hereinafter referred to as DPF) in the engine’s aftertreatment system has become one of the necessary technical means. Its function is to capture residual solid particles in the exhaust of the filtered engine and convert it into carbon dioxide and nitrogen by high temperature regeneration.
Frequently Asked Questions 1: What is the particle trap DPF?
▍Answer: The Chinese name of the DPF is called the particle trap. It is a large filter. All the black smoke generated by the engine is collected in this filter, which can reduce the particulate emissions of the vehicle.
Frequently Asked Questions 2: What is regeneration? Why regenerate?
▍Answer: More and more black smoke (carbon particles) are collected in the particle trap, which will slowly increase the exhaust back pressure of the engine and affect the engine’s power. The process of burning the collected black smoke by the high temperature method of exhaust heating is called regeneration. The regenerated filter element can be kept open again, so that it will not continue to affect engine performance.
At the beginning of the answer, it is normal for the DPF to have a large amount of smoke during the first regeneration: the temperature during DPF regeneration is very high, usually exceeds 320 °C, and the forced regeneration of the parking will reach 600 °C or more. And stayed for nearly an hour or so. Such a high exhaust temperature is sufficient to bake and volatilize the outer paint layer of the exhaust line and the grease material on its outer casing. After the first forced regeneration, there will be no such obvious smoke occurrences in the future.
Through the above introduction, have you already had a certain understanding of DPF regeneration? Congratulations, you have made a big step towards qualified users, but to become a truly qualified user, you need to know more about DPF. Recycling information and related operations, I will briefly introduce you to “passive regeneration” and “active regeneration”.
“Passive regeneration” is automatic after the temperature condition is reached, without the active participation of the user;
“Active regeneration” is a situation that can be carried out with manual intervention when the corresponding fault light is on (or when the corresponding fault light combination is lit), which is divided into two situations: “regeneration” and “relocation”. . Active regeneration requires the observation and interpretation of different conditions of the vehicle’s instrument lights, and correspondingly different active regeneration. In addition, for safety reasons, to prevent high temperature regeneration of DPF in certain hazardous environments, a “no regeneration” physical switch button is usually installed on the vehicle.
