Järjestely mäntäpolttomoottoria varten ja mäntäpolttomoottori

摘要

Invention relates to an arrangement for an internal combustion piston engine having a cooling system for conveying heat from the internal combustion piston engine and maintaining temperature of the engine and/or its parts at a predetermined range, the cooling system comprising a main cooling fluid channel (12) having a pump system (14) which main cooling fluid channel is arranged to run though at least a part of the engine from which heat is extracted, and a branch channel (18) which branches from the main cooling fluid channel (12) in which branch channel there is a cooler system (20) for cooling the cooling fluid, and into which cooling system a fluid flow control device (22) is arranged at a the location where the branch channel branches from the main cooling fluid channel. The fluid flow control device (22) comprises at least two parallel valve units each having two operational positions.