A dpf active regeneration system with a burner

Abstract

The invention discloses a DPF (diesel particulate filter) initiative regeneration system with a combustor. The DPF initiative regeneration system is characterized in that the combustor and an engine of the system are respectively driven by individual oil pumps via individual oil passages, an exhaust pipe of the combustor is connected to an exhaust pipe of the engine, a diesel oxidation catalyst and a diesel particulate filter are sequentially serially connected onto the exhaust pipe of the engine, temperature sensors are respectively arranged at a gas inlet end of the diesel oxidation catalyst and a gas inlet end of the diesel particulate filter, and a pressure difference sensor is serially connected to the gas inlet end and a gas outlet end of the diesel particulate filter; oil injection of the oil pump of the combustor and ignition of an electric heater plug in the combustor can be controlled by an electronic control unit (ECU) according to collected temperature signals and pressure signals, accordingly, high-temperature gas can be generated and is gathered in the exhaust pipe of the engine to heat waste gas in the exhaust pipe, the temperature of the heated waste gas further can be increased by means of oxidation of the DOC (diesel oxidation catalyst), and particulates in the DPF can be regenerated. The DPF initiative regeneration system has the advantages that the combustor can work at any time without being constrained by starting and stopping of vehicles and other working conditions, and accordingly the particulate regeneration reliability and universality can be guaranteed.

Description

technical field [0001] The invention relates to a DPF active regeneration system with a burner. Background technique [0002] With the increasingly stringent emission regulations, in order to achieve lower engine emissions, under the current technical conditions, it is necessary to install DOC (Diesel Oxidation Catalyst oxidation catalyst) and DPF (Diesel Particulate Filter particulate trap), that is, the engine exhaust first enters the oxidation catalyst DOC, after DOC treatment, the hydrocarbons and carbon monoxide in the exhaust react with the residual oxygen in the exhaust to form harmless carbon dioxide and water, and release The heat heats up the exhaust gas, and then the exhaust gas enters the particle filter DPF, and the particles are trapped in the DPF through a series of diffusion, interception, inertial collision and gravity deposition, so as to achieve lower emissions. [0003] After using the above emission route for a period of time, particles will be deposite...

AI Technical Summary

Problems solved by technology

In this regeneration system, the burner works in series in the exhaust flow of the engine, and uses the exhaust gas of the engine as the combustion-supporting gas when the burner is working. Therefore, the combustion is easily affected by the exhaust condition, and it is difficult to organize the combustion process. Poor combustion may cause secondary pollution under working conditions

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