Ignition unit and low energy consumption diesel engine exhaust gas treatment system based on ignition unit

Abstract

The invention discloses an ignition unit and a low energy consumption diesel engine exhaust gas treatment system based on the ignition unit, comprising an ignition housing with an inlet and an outlet, a nozzle pipe, a first swing check valve for avoiding backflow of high-temperature exhaust gas, and an air inlet The cavity of the flame outlet and the glow plug used for ignition, the nozzle pipe is connected with the peripheral fuel supply unit through the fuel solenoid valve and extends into the cavity through the first swing check valve, and the glow plug is fixed on the ignition shell body and extend into the cavity. In the present invention, fresh air and fuel are mixed in the ignition unit and then ignited. The three-way air passage receives the high-temperature mixed airflow and the exhaust airflow, and the formed total airflow enters the DPF and oxidizes and removes accumulated soot; it reduces the impact on PGM in DOC and DPF Coating requirements, and reduce the sensitivity of the system to the sulfur content in fuel, while the regeneration of low exhaust gas flow reduces energy consumption; improves fuel economy, making it suitable for in-use car modification applications.

Description

Technical field[0001]The invention relates to a tail gas treatment system, in particular to an ignition unit and a low energy consumption diesel engine tail gas treatment system based on the ignition unit.Background technique[0002]Engine exhaust has been identified as the main cause of air pollution. In order to remove air pollutants in the exhaust gas, an exhaust gas treatment system is required. Commonly used exhaust gas treatment systems use diesel particulate traps (DPF) to capture particulate matter (PM), which may include unburned hydrocarbon particles or soot and a small amount of other particles, such as metal oxide particles or ashes. PM particles accumulate in the DPF, increasing the back pressure of the engine. Before the back pressure of the engine becomes too high, a regeneration process is required to remove the accumulated soot.[0003]Generally, in the regeneration process, a heating device is used to raise the exhaust gas temperature to a level where the soot can be e...

AI Technical Summary

Problems solved by technology

However, DOC requires a higher PGM (precious metal) load, and only when the exhaust gas temperature is higher than the light-off temperature (usually higher than 200 ° C), the metered injection of fuel can only be started

At the same time, the PGM in DOC is sensitive to the sulfur content in fuel oil, because the high sulfur content in the exhaust gas can poison and make the PGM catalyst ineffective

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