Patent ID: 8413627

Claim:
An arrangement for controlling a gaseous medium which contains water vapour in a supercharged combustion engine, the arrangement comprising: a path for the gaseous medium leading to the engine, a low-temperature cooling system configured for circulating a circulating coolant, a first cooler at the low temperature cooling system for being cooled by it, and the first cooler is at the path of the gaseous medium, such that the gaseous medium is cooled by the coolant in the low temperature cooling system via the first cooler, a high temperature cooling system, a second cooler at the high temperature cooling system for being cooled by it, the second cooler is located at the path of the gaseous medium so that the gaseous medium in the path is subjected to a first step of cooling by the second cooler at the high-temperature cooling system before the gaseous medium is led along the path to the first cooler at which the gaseous medium is subjected to a second step of cooling by the coolant in the low-temperature cooling system; an electric circuit with an electric warming unit which is positioned and configured to warm the coolant in the low temperature cooling system, a voltage source in circuit with the warming unit and also with a circuit-breaker such that when the circuit breaker is in a first position, it disconnects the warming unit and the voltage source and when the circuit breaker is in a second position, it connects the warming unit and the voltage source so that the warming unit receives electrical energy from the source and warms the coolant in the low temperature cooling system; at least one sensor configured and located to detect a parameter which indicates whether the gaseous medium in the path is cooled to such an extent that there is ice formation or risk of ice formation in the first cooler; and a control unit configured to receive information from the at least one sensor and to decide whether there is ice formation or risk of ice formation in the first cooler and, if the control unit decides there is ice formation or risk thereof in the first cooler, the control unit placing the circuit-breaker in the second position.