Coolant circuit and method for a multi-cylinder internal-combustion engine
AssigneeDr. Ing. h.c.F. Porsche Aktiengesellschaft
InventorManfred Batzill
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Abstract
A coolant circuit and method of operating a coolant circuit is provided for a multi-cylinder internal-combustion engine. A cooling jacket which surrounds a cylinder head housing and a cylinder block and is supplied with cooling liquid by way of a pump. The cylinder cooling jacket and the cylinder head cooling space are provided with a connection for feeding the cooling liquid and with the cooling liquid flowing parallel through the cylinder head housing and the cylinder block. Thus, a cooling of the cylinder block and the cylinder head which meets the requirements takes place without any additional control devices. The engine rapidly reaches its operating temperature, thereby reducing the cold running phase. As a result, the fuel consumption and the crude emissions can be reduced.
Claims13
Coolant circuit for a multi-cylinder internal-combustion engine having a cooling jacket surrounding a cylinder head housing and a cylinder block and supplied with cooling liquid by means of a pump, characterized in that at least one cylinder cooling jacket and at least one cylinder head cooling space is provided with a connection for supplying the cooling liquid, in that the flow of cooling fluid through the cylinder head housing and the cylinder block takes place in parallel, and in that the cooling liquid flows transversely through the cylinder head cooling space by way of a longitudinal coolant duct connected with the connection, which longitudinal coolant duct has inlet openings assigned to individual cylinder head units and leading into the cylinder head cooling space.
Method of operating a coolant circuit for a multi-cylinder internal-combustion engine, having a cooling jacket which surrounds a cylinder head housing and a cylinder block and which is supplied with cooling liquid by way of a pump, at least one cylinder cooling jacket and at least one cylinder head cooling space being provided with a connection for supplying the cooling liquid, comprising providing simultaneous parallel cooling liquid flows through the cylinder head housing and the cylinder block, wherein the cooling liquid flows transversely through the cylinder head cooling space by way of a longitudinal coolant duct connected with the connection, which longitudinal coolant duct has inlet openings assigned to individual cylinder head units and leading into the cylinder head cooling space.
Dependencies are inferred from the claim text.