A COOLING SYSTEM FOR AN INTERNAL COMBUSTION PISTON ENGINE, A METHOD OF OPERATING AN INTERNAL COMBUSTION PISTON ENGINE AND AN INTERNAL COMBUSTION PISTON ENGINE

摘要

Invention relates to a cooling system (10) for an internal combustion piston engine (12) comprising a circuit (14) for cooling fluid, a pump (24) arranged in the circuit (14) so as to maintain the fluid flowing in the circuit (14), an engine cooling system (26) arranged to cool the engine or parts thereof and heat the fluid in the circuit (14), and a combustion air cooling system (28) arranged to cool combustion air and heat the fluid in the circuit (14) by the heat transferred from the combustion air wherein a fluid flow control system (30) is arranged to the circuit (14) for controlling fluid flow in response to temperature of the fluid flowing from the combustion air cooling system (28) such that a portion of the fluid flowed through the combustion air cooling system (28) is arranged to flow to a passage (32) of the fluid flow control system (30), which passage (32) is arranged to lead the portion of the fluid back into the combustion air cooling system (28) so as to heat further at least the portion of the fluid by the heat transferred from the combustion air so obtaining a predetermined temperature for the fluid flowing in the circuit (14) after the combustion air cooling system (28). The invention relates also to a method of operating an internal combustion piston engine and an internal combustion piston engine.