Heat management system and heat management method of an internal combustion engine

A thermal management method for operating a thermal management system of an internal combustion engine, comprising:

• a fluid chamber and disposed at least partially within or around a cylinder head of the internal combustion engine, the fluid chamber comprising
• an inlet line and an outlet line, the fluid chamber being connected to at least one coolant delivery device for supplying a coolant and is connected to at least one heat sink, and
• an upper fluid chamber region formed as a cylinder head fluid chamber,
• a lower fluid chamber region formed as a cylinder block fluid chamber,
• a cylinder head gasket seperating the upper fluid chamber region and the lower fluid chamber region and configured so that the volume flow of the coolant through the lower fluid chamber region can be adjusted independently of the volume flow of the upper fluid chamber region,
• wherein with an increasing temperature of the fluid chamber, after a warm-up phase at a constant or decreasing engine speed, the coolant flow rate through the heat sink is at least temporarily increased;
• and
• at constant engine speed or at engine speed increasing at a maximum 100 revolutions per minute and with a load change reducing an engine load, the coolant flow rate through the heat sink stays constant or is increased, and after at least one minute after the load change, the coolant flow rate through the heat sink stays constant or is increased within a temperature range of 60° C. to 100° C. of the fluid chamber.

A thermal management system of an internal combustion engine, comprising:

• a fluid chamber and disposed at least partially within or around a cylinder head of the internal combustion engine, the fluid chamber comprising
• an inlet line and an outlet line, the fluid chamber being connected to at least one coolant delivery device for supplying a coolant and being connected to at least one heat sink
• a plurality of fluid chamber regions including:
• an upper fluid chamber region formed as a cylinder head fluid chamber, and
• a lower fluid chamber region formed as a cylinder block fluid chamber, and
• a cylinder head gasket separating the upper fluid chamber region and the lower fluid chamber region and configured so that the volume flow of the coolant through the lower fluid chamber region can be adjusted independently of the volume flow of the upper fluid chamber region;
• the thermal management being configured to
• after a warm-up phase at a constant or decreasing engine speed, temporarily increase the coolant flow rate through the heat sink with an increasing temperature of the fluid chamber, and
• at constant engine speed or at engine speed increasing at a maximum 100 revolutions per minute and with a load change reducing an engine load, keep constant or increase the coolant flow rate through the heat sink, and after at least one minute after the load change, keep constant or increase the coolant flow rate through the heat sink within a temperature range of 60° C. to 100° C. of the fluid chamber,
• wherein the fluid chamber is divided into an upper fluid chamber region and a lower fluid chamber region, the upper fluid chamber region being formed as a cylinder head fluid chamber, and the lower fluid chamber region being formed as a cylinder block fluid chamber, is separated by a cylinder head gasket so that the volume flow of the coolant through one of the two fluid chambers, the cylinder block fluid chamber, can be adjusted independently of the volume flow of the other fluid chamber, the cylinder head fluid chamber.

A thermal management method for operating a thermal management system of an internal combustion engine, comprising:

• at least one fluid chamber with at least one inlet line and at least one outlet line, disposed at least partially within or around a cylinder head of an internal combustion engine;
• wherein the fluid chamber is connected to at least one coolant delivery device for supplying a coolant and is connected to at least one heat sink, wherein with increasing temperature of the fluid chamber the coolant flow rate through the heat sink is at least temporarily increased;
• at constant engine speed or at engine speed increasing at maximum 100 revolutions per minute and with reducing engine load, the coolant flow rate through the heat sink is not reduced;
• and
• with the exhaust gas flow through at least one controllable exhaust gas valve of the internal combustion engine in the direction of the combustion chamber of the cylinder at constant position of the load-setting unit,
• at a speed of 50% of the rated speed, the maximum opening cross-section of the exhaust gas valve is within a maximum tolerance of maximum 20% of the maximum opening cross-section during a respective working cycle;
• at increased speed, is maintained above the engine speed of at least 0.5 times the rated speed;
• or
• at constant speed and increased engine load, is maintained within a load range of between 50% to 75% of the maximum engine load of the respective speed within a tolerance of maximum 20% of the maximum opening cross-section of the exhaust gas valve.