Spark plug with pre-combustion chamber and engine

• Main Authors: DU DEKUI, LI YAO, YANG HUIMU
• Format: Patent
• Language: Chinese; English
• Published: 03.02.2023
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; COMBUSTION ENGINES; CORONA DEVICES; ELECTRICITY; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARK GAPS; SPARKING PLUGS; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

The invention relates to a spark plug with a pre-combustion chamber, which comprises an insulator, a central electrode, a metal shell, an inner sealing washer and a pre-combustion chamber cap, the pre-combustion chamber is communicated with an engine combustion chamber through a spray hole, and mixed gas in the engine combustion chamber enters the pre-combustion chamber through the spray hole. Residual waste gas in the pre-combustion chamber is reduced by controlling the distance between the top end of the central electrode and the inner sealing gasket and the size of the rear pre-combustion chamber, then the influence of the residual waste gas on the concentration of mixed gas newly pressed into the pre-combustion chamber is reduced, and the ignition success rate of the mixed gas in the pre-combustion chamber is increased. By controlling the ratio of the volume of the pre-combustion chamber to the volume of the engine combustion chamber, the injection kinetic energy of combustion mixed gas in the pre-combust