INTERNAL COMBUSTION ENGINE

• Main Author: ASHIZAWA TAKESHI
• Format: Patent
• Language: English; Japanese
• Published: 28.02.2019
• 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; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; WEAPONS

To provide an internal combustion engine capable of consistently burning air-fuel mixture in a main combustion chamber in an internal combustion engine which bursts flame from an ignition chamber to the main combustion chamber.SOLUTION: A partition wall part 80 divides a combustion chamber CC into a main combustion chamber CM where the cylinder bore wall and the piston crown surface part are exposed and an ignition chamber CI where a spark generation portion is exposed. In the partition wall part, a first open hole 81 and a second open hole 82 are formed for communicating the ignition chamber with the main combustion chamber. When starting the combustion of the air-fuel mixture in the ignition chamber by an electric spark generated from the spark generation portion, the flame is created in the ignition chamber. The flame bursts from the ignition chamber to the main combustion chamber through the first and second open holes. The distance between the first open hole and the cylinder bore wall is longer than the distance between the second open hole and the cylinder bore wall. The first and second open holes are formed so that the penetration force of the flame blown out from the first open hole is larger than the penetration force of the flame blown out from the second open hole.SELECTED DRAWING: Figure 1 【課題】点火室から火炎を主燃焼室へと噴出する内燃機関において、主燃焼室において混合気を安定して燃焼させることができる内燃機関を提供する。【解決手段】区画壁部８０は、燃焼室ＣＣを、シリンダボア壁及びピストン冠面部が露出する主燃焼室ＣＭと、火花発生部が露出する点火室ＣＩと、に区画する。区画壁部には、点火室と主燃焼室とを連通させる「第１貫通孔８１及び第２貫通孔８２」が形成されている。点火室にて火花発生部から発生する火花により混合気の燃焼を開始させると、点火室に火炎が生成される。その火炎は、点火室から主燃焼室へと第１及び第２貫通孔を通して噴出する。第１貫通孔とシリンダボア壁との距離は、第２貫通孔とシリンダボア壁との距離よりも長い。第１及び第２貫通孔は、第１貫通孔から噴出される火炎の貫徹力が、第２貫通孔から噴出される火炎の貫徹力よりも大きくなるように形成されている。【選択図】図１