Engine ignition chamber system with high-disturbance composite channels

Abstract

The invention discloses an engine ignition chamber system with high-disturbance composite channels. The engine ignition chamber system comprises a shell, a shell cover and an ignition chamber, whereinthe bottom end of the shell extends into a main combustion chamber of an engine, and a plurality of channels are formed near the bottom end of the shell, and are used for communication between the ignition chamber and the main combustion chamber of the engine; at least one channel of the channels adopts a high-disturbance composite channel structure formed by cross convergence of N sub-channels,wherein the N is greater than or equal to 3; and the first sub-channel to the N-1th communicate with the ignition chamber to form a flow dividing area of the high-disturbance composite channels, and the Nth sub-channel communicates with the main combustion chamber to form a disturbance area of the high-disturbance composite channels. The invention aims to provide the novel ignition chamber systemfor a large-cylinder-diameter ignition engine, at a certain jet rate of the ignition chamber, the turbulence disturbance of jet flow of the ignition chamber on the main combustion chamber is improved,combustion of the main combustion chamber is accelerated, and performance and emission of the engine are improved.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to an engine ignition chamber system with a high-disturbance composite channel. Background technique [0002] With the continuous development of science and technology, the performance of the engine is more and more advanced. For now, the use of lean burn can improve the thermal efficiency of the ignition engine and reduce harmful emissions. However, there are two difficulties in the implementation of lean combustion in the engine cylinder: first, the ignition of the lean mixture is difficult, so a high-energy ignition device is required; efficiency, increasing unburned hydrocarbon emissions. Especially for an engine with a large bore, such as an engine with a bore greater than 150mm, the probability of these abnormal combustion phenomena is higher due to the longer required flame propagation distance. [0003] In order to solve the problem of difficult implementation ...

AI Technical Summary

Problems solved by technology

For example, a small change in the geometric structure of the channel connecting the ignition chamber and the main combustion chamber may cause a large change in the flow and combustion characteristics in the engine cylinder, which in turn affects performance indicators such as engine thermal efficiency

In the prior art, the channel of the engine ignition chamber system generally adopts a circular hole-like structure. The limitation of this channel structure is that the turbulent disturbance intensity provided to the main combustion chamber is limited under a certain turbulent flame jet velocity in the ignition chamber. , affecting engine performance and emissions

Images