A Straight Inlet Rotary Sliding ARC Plasma Diesel Engine Exhaust Treatment Method and Device Design

Abstract

Diesel exhaust contains a large number of hydrocarbons, which are difficult to decompose and carcinogenic, so it’s necessary to degrade hydrocarbons. Rotary sliding arc discharge is an effective method to decompose hydrocarbons, but the traditional rotary sliding arc discharge needs to rely on tangential air intake. In the actual application of diesel engine exhaust treatment, it has high design difficulty and transformation cost. Direct inlet can realize plasma arc rotating sliding mode without changing the exhaust emission structure of diesel engine. It is simple and practical. In this paper, a low-cost plasma rotary sliding arc device with direct air inlet is proposed, which is based on arc duration T Keep , arc breaking time T d , arc duration cycle Duty , and arc rotation angle ω as the electrical parameter index of sliding arc discharge working characteristics, the mathematical model of rotating sliding arc working electrical characteristic parameters is established by fitting, and the optimal discharge characteristic parameters of the device platform are obtained. The experimental results show that the proposed direct air inlet mode and index evaluation method, the determined input current value of HVDC drive is 35mA, the gas flow rate is 11.5L/min, and the arc rotation angle is 3.09 π, which has the best discharge effect, and the proposed device has an obvious removal effect on carbon hydride.