Combustion system and control method capable of simulating the effect of post-injection strategy on soot emissions

Abstract

The invention discloses a combustion system capable of simulating the impact on the soot discharge from a post injection strategy, and the system comprises a displacement platform, a fixed platform, a first McKenna diffusion burner, a second McKenna diffusion burner, a particle size spectrometer, a first constant temperature water tank, a second constant temperature water tank, a vacuum pump, a sampling device, a stainless steel probe, a liquid fuel vaporizer, a controller, and a computer control system. The first McKenna diffusion burner is disposed on the fixed platform, and the second McKenna diffusion burner is disposed on the displacement platform. The displacement platform is controlled by two stepping motors, and the two stepping motors are connected with the computer control system, thereby achieving a purpose that the second McKenna diffusion burner moves in the axial and vertical directions of the stainless steel probe. The system enables the carbon soot particles generated by the first McKenna diffusion burner to be let into the flame of the second McKenna diffusion burner for burning, thereby achieving the approximate research of the impact on physical characteristics of the carbon soot particles from the post injection strategy of a diesel engine.

Description

technical field [0001] The invention relates to a combustion system, in particular to a combustion system capable of simulating the effect of a post-injection strategy on the soot emission of a diesel engine. Background technique [0002] Soot is one of the main pollutants emitted by diesel engines. Although diesel engines are favored by people because of their strong power, the large amount of soot emissions limits the development of diesel engines to a certain extent. The soot emitted by diesel engines will not only cause serious air pollution, but also cause great harm to human health, especially fine particles and ultrafine particles. Due to their small aerodynamic diameter and strong permeability, they can enter the human body The lungs are deposited in the alveoli of the human body, causing the alveoli to congest and form scar tissue, thereby affecting the elasticity of the respiratory tract and lungs, and causing great damage to the human body. Therefore, it is imper...

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Problems solved by technology

[0003] In order to understand more clearly the impact of diesel engine rear injection strategy on soot emission, researchers have carried out extensive research on rear injection strategy. Diesel engines will also be subject to varying degrees of wear and tear

In addition, the combustion state in the diesel engine cylinder is very complicated, and the combustion cycle changes greatly, so it is impossible to study the influence of a single variable on the soot emission

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