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Patent Searching and Data


Title:
EXHAUST DEVICE FOR ENGINE
Document Type and Number:
Japanese Patent JPS6477716
Kind Code:
A
Abstract:
PURPOSE:To attempt the improvement and the like in a heat radiation effect by means of communication passages by arranging communication passages communicating independent exhaust gas passages with each other underneath the exhaust gas passages in a device wherein independent exhaust gas passages are connected to each exhaust port of cylinders. CONSTITUTION:Each exhaust port 3a through 3d of respective cylinders 2a through 2d is formed within a cylinder head 1, and each independent exhaust gas passage 4a through 4d is connected with each exhaust gas port 3a through 3d concurrently wherein the aforesaid independent exhaust gas passages 4a through 4d are joined with each other at their downstream so as to form a collected exhaust gas passage 5. In this constitution, each of NO.1 and NO.4 independent exhaust gas passages 4a and 4d is communicated each other by NO.1 communication passage 6ad, and each of NO.2 and NO.3 independent exhaust gas passages 4b and 4c is also communicated each other by NO.2 communication passage 6bc. In this case, NO.1 communication passage 6ad is arranged in parallel with the cylinder arrangement direction while being extended underneath each independent exhaust gas passage 4a through 4d.

Inventors:
HARAGA KAZUHIRO
OZURU TAKASHI
Application Number:
JP23372387A
Publication Date:
March 23, 1989
Filing Date:
September 19, 1987
Export Citation:
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Assignee:
MAZDA MOTOR
International Classes:
F01N13/10; F02B37/02; (IPC1-7): F01N7/10; F02B37/02