Dual-injection turbulent jet ignition pre-chamber device for spark ignition engine

Abstract

The invention provides a dual-injection type turbulent jet ignition pre-combustion chamber device for a spark ignition engine. The dual-injection type turbulent jet ignition pre-combustion chamber device comprises two compression bolts, a fuel injector (3), a gas injector (9), a pre-combustion chamber upper cavity (8), a pre-combustion chamber nozzle (5), a pre-combustion chamber nozzle compression piece (6) and a spark plug (7). The spark plug (7), the fuel injector (3) and the gas injector (9) are fixed in the pre-combustion chamber upper cavity (8), and each of the fuel injector (3) and the gas injector (9) is fixed in the pre-combustion chamber upper cavity (8) through a compression bolt; each compression bolt is provided with a through hole (10), two ends of each compression bolt are provided with threads, one end of each compression bolt is connected with the pre-combustion chamber upper cavity (8) through the threads and used for fixing the gas injector (9) or the fuel injector (3), and the other end of each compression bolt is connected with a gas path or a fuel path; and the pre-combustion chamber nozzle (5) is pressed by the pre-combustion chamber nozzle compression piece (6) and is fixed to the lower end of the pre-combustion chamber upper cavity (8) to form a pre-combustion chamber inner cavity (12).

Description

technical field [0001] The invention relates to the technical field of internal combustion engine combustion, and relates to a multi-mode turbulent jet ignition pre-combustion chamber device for ignition engines. Background technique [0002] The intensification of environmental pollution has made the emission problems faced by internal combustion engines more severe! In order to limit the emissions of internal combustion engines, governments and international organizations have enacted more stringent emission regulations. How to improve the thermal efficiency of internal combustion engines while reducing emissions has become a hot topic worldwide. Exhaust gas recirculation (EGR) technology is a technology that separates part of the exhaust gas discharged after in-cylinder combustion and introduces it into the intake side, so that it can participate in in-cylinder combustion again. The main purpose is to improve the fuel economy of the engine under partial load performance...

AI Technical Summary

Problems solved by technology

For the working condition of high EGR rate, the proportion of exhaust gas in the pre-combustion chamber is relatively high, and the oxygen concentration is low, which makes it difficult to ignite in the pre-combustion chamber and cannot stably form a jet flame, which may easily cause misfire, affect the thermal efficiency of the engine, and worsen emissions; low EGR Under high-speed working conditions, after ignition, the flame development speed in the pre-combustion chamber slows down, delaying the combustion process, resulting in a decrease in the intensity and speed of the jet flame, and a worsening of the ignition effect, which weakens the improvement and promotion of the jet flame on the combustion process of the mixture in the main combustion chamber

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