Spark plug and engine

• Main Authors: LI YAO, YANG HUIMU
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2022
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CORONA DEVICES; ELECTRICITY; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARK GAPS; SPARKING PLUGS; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; WEAPONS

In order to solve the technical problem that in the prior art, a spark plug is prone to overheating ablation, the spark plug provided by the present invention comprises a main shell arranged at the periphery of an insulator and an outer side shell connected with a metal tail cover, the outer shell is arranged at the periphery of the main shell, and the plane, orthogonal to an axis, of the front end point of the main shell is a plane A; the plane, orthogonal to the axis, of the lower supporting point of the outer side shell is a plane B, the distance between the plane A and the plane B is L, and L meets the following formula that L is larger than or equal to 50*[H+(D-d)/2]/lambda+T and smaller than or equal to 324*S/(80+lambda) H+2T. The spark plug is provided with a pre-combustion chamber, and on the premise that the good ignition performance of the spark plug with the pre-combustion chamber is guaranteed, the problem of overheating of the spark plug is solved through the structural design with good heat diss