COOLING STRUCTURE FOR EGR GAS

• Main Authors: ASANO MASAHIKO, ABE GENICHI
• Format: Patent
• Language: English; Japanese
• Published: 25.04.2019
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; COMBUSTION ENGINES; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

To provide a cooling structure for EGR gas enabling saving of a space in a cylinder head and improvement of EGR gas cooling performance.SOLUTION: A cooling structure for EGR gas includes: an EGR gas passage provided in a cylinder head; a first water jacket that is provided in the cylinder head and in which first cooling water having a first temperature flows; and a second water jacket that is provided in the cylinder head and located on the downstream side of the first water jacket in the EGR gas passage and in which second cooling water having a second temperature different from the first temperature flows.SELECTED DRAWING: Figure 1 【課題】シリンダヘッド内の省スペース化およびＥＧＲガスの冷却性能の向上が可能なＥＧＲガスの冷却構造を提供することを課題とする。【解決手段】シリンダヘッドに設けられたＥＧＲガス通路と、前記シリンダヘッドに設けられ、第１の温度の第１冷却水が流れる第１ウォータジャケットと、前記シリンダヘッドに設けられ、前記第１ウォータジャケットよりも前記ＥＧＲガス通路の下流側に位置し、前記第１の温度とは異なる第２の温度の第２冷却水が流れる第２ウォータジャケットと、を具備するＥＧＲガスの冷却構造。【選択図】図１