Spark plug

• Main Authors: ONO KAZUJI, SHINTANI YUSUKE, TAKAKURA SHIRO
• Format: Patent
• Language: Chinese; English
• Published: 26.07.2022
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; WEAPONS

The utility model provides a spark plug which can restrain the preignition phenomenon generated in an auxiliary chamber. The spark plug has a center electrode and an outer electrode housed in a sub-chamber, the sub-chamber communicates with a combustion chamber of the cylinder through a plurality of communication holes formed in the sub-chamber, the sub-chamber is disposed in the center of the combustion chamber, the communication holes are obliquely opened toward the outer periphery of the combustion chamber, and the center lines of the plurality of communication holes intersect at one intersection point. Wherein the distance from the intersection point to each of the plurality of communication holes is a first distance, the distance from the intersection point to the outer electrode is a second distance, and when the position of the intersection point is between the outer electrode and the plurality of communication holes, the second distance is set as a positive value, and when the position of the intersec