SELF-IGNITION TYPE INTERNAL COMBUSTION ENGINE, AND PISTON

• Main Authors: AOKI SEIHEI, SAKURAI TORU, OKAMOTO YOSHITOMO, OZAWA DAISUKE, YAMASHITA HITOSHI, YAMANOUCHI DAISUKE, IKENO RYO
• Format: Patent
• Language: English; Japanese
• Published: 19.09.2019
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

To provide a self-ignition type internal combustion engine in which the combustion efficiency of sprayed fuel in a center region of a cavity part can be improved.SOLUTION: The self-ignition type internal combustion engine is provided that comprises a combustion chamber N demarcated between a cylinder head part 20 and a cavity part 11 formed at an apex face of a piston 10, the combustion chamber N has: a lip part 13 formed at an opening edge part of an internal peripheral side face of the cavity part 11, and projecting toward a center region from the internal peripheral side face; a salient part 12 formed at the center region of a bottom face of the cavity part 11, and salient upward from the bottom face; and a turbulent flow generation part 14 formed at an external peripheral region of the bottom face of the cavity part 11, and converting a part of a swirl flow flowing in the external peripheral region to a turbulent flow.SELECTED DRAWING: Figure 3 【課題】キャビティ部の中心領域における噴霧燃料の燃焼効率を改善することを可能とする自己着火式の内燃機関を提供すること。【解決手段】シリンダヘッド部２０とピストン１０の頂面に設けられたキャビティ部１１との間に区画形成される燃焼室Ｎを備える自己着火式の内燃機関であって、前記燃焼室Ｎは、前記キャビティ部１１の内周側面の開口縁部に形成され、当該内周側面から中心領域に向かって張り出すリップ部１３と、前記キャビティ部１１の底面の中央領域に形成され、当該底面から上方に向かって隆起する隆起部１２と、前記キャビティ部１１の底面の外周領域に形成され、当該外周領域に通流するスワール流の一部を乱流に変換する乱流生成部１４と、を有する。【選択図】図３