A Large-Volume Ignition System Based on Nanosecond Pulse Discharge

Abstract

The present disclosure proposes a large-volume ignition system and an engine based on nanosecond pulse discharge, including a nanosecond pulse generation device and an ignition end. The discharge electrode at the ignition end is set as a coaxially distributed metal foil electrode; the nanosecond pulse generation device outputs nanosecond A nanosecond pulse signal with a set amplitude of the second magnitude acts on the positive and negative electrodes of the metal foil electrodes to ignite. The present disclosure adopts nanosecond pulse signal, and compared with the common ignition coil discharge, the ignition effect is good and the energy utilization rate is high. At the same time, the redesigned electrode realizes the generation of plasma in a large volume in the form of dispersion discharge without the aid of other auxiliary devices. Under the premise of low output power, high-energy discharge with nanosecond high frequency and large current is realized, and most of the energy is used to increase the electron temperature, generate a large number of high-energy electrons, improve the chemical activity of the reaction system, and increase the initial fire core volume. Accelerates combustion, thereby improving ignition success in lean burn conditions.

Description

technical field [0001] The present disclosure relates to the technical field of engines, in particular, to a large-volume ignition system based on nanosecond pulse discharge. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] In response to increasingly stringent environmental regulations and a possible oil crisis, efficient and clean internal combustion engine technology has always been the focus of research. Lean burn is a very promising combustion method. However, there are problems of difficulty in ignition and unstable flame propagation. The chemical effect of non-equilibrium plasma is more significant, and it has broad application prospects in the fields of emerging combustion technologies such as flameless combustion, overfrequency combustion, and low temperature combustion. [0004] The inventor found that there are certain proble...

AI Technical Summary

Problems solved by technology

However, high-energy beams are easy to damage optical devices such as coated mirrors in the laser multi-point ignition system, reducing the service life of the system; at the same time, the traditional silicon optical fiber has a low optical damage threshold and cannot meet the transmission requirements of laser pulses for internal combustion engine ignition.

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