Internal combustion engine having a noise suppressing encapsulation

Claim 1

An internal combustion engine having an exhaust system, a noise-suppressing encapsulation and a blower for ventilation of said encapsulation, comprising: cooling air ducts being formed within the encapsulation by means of partitions through which the cooling air flows in two partial streams, one of said cooling air ducts forming a first partial air stream enclosing and cooling the engine, the other cooling air duct being imperviously divided from the first, and forming a second partial air stream enclosing and cooling the parts of the exhaust system arranged within the encapsulation including the exhaust pipe and the exhaust manifold all of said exhaust system parts being surrounded by a jacket spaced away from the exhaust pipes, said second partial air stream flowing through a space formed between said parts of the exhaust system and said jacket, the jacket being secured to the engine leaving gaps in the vicinity of the securing points for the entry of the cooling air, said jacket being made of sheet metal and simultaneously serving as a partition for the separation of said two partial air streams, and said jacket leading the air stream within it separated from the other air stream out of the encapsulation.