27-05-2021 дата публикации
Номер: US20210156333A1
The disclosure provides a multi-cylinder internal combustion engine having a cylinder head that includes an exhaust port capable of cooling exhaust gas more effectively. The cylinder head includes: a first ceiling surface that closes a first cylinder having a cylinder axis separated from an exhaust opening by a first distance; a second ceiling surface that closes a second cylinder having a cylinder axis separated from the exhaust opening by a second distance shorter than the first distance; and an exhaust port that extends toward the exhaust opening from two port openings which are open to a combustion chamber for each individual cylinder. The exhaust port individually extends from each of the port openings and merges with each cylinder outside a joining surface of the cylinder head for a cylinder block in a plan view. 11115. A multi-cylinder internal combustion engine () , comprising a cylinder head () which comprises:{'b': 24', '37', '1, 'i': 'a', 'a first ceiling surface () that closes a first cylinder having a cylinder axis (C) separated from an exhaust opening () by a first distance (L);'}{'b': 24', '37', '2', '1, 'i': 'b', 'a second ceiling surface () that closes a second cylinder having a cylinder axis (C) separated from the exhaust opening () by a second distance (L) shorter than the first distance (L); and'}{'b': 32', '37', '26', '18, 'an exhaust port () that extends toward the exhaust opening () from two port openings () which are open to a combustion chamber () for each individual cylinder,'}{'b': 32', '26', '27', '15', '13, 'wherein the exhaust port () individually extends from each of the port openings () and merges with each cylinder outside a joining surface () of the cylinder head () for a cylinder block () in a plan view.'}2. The multi-cylinder internal combustion engine according to claim 1 , wherein{'b': 47', '41', '37', '45', '41, 'i': b', 'a, 'a wall () that partitions the two exhaust ports () in the second cylinder extends toward an exhaust ...
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