Patent ID: 8667796

Claim:
A piston engine provided with a turbocompressor including a compressor for compressing combustion air and an exhaust gas turbine coupled to drive the compressor, said piston engine comprising: a flow duct for conveying combustion air pressurized by the compressor to cylinders of the engine, an exhaust gas duct for conveying exhaust gas from the engine to the turbine, at least one nozzle provided in connection with the turbine for injecting a cleansing agent into the turbine during a cleaning sequence, a feeding means for introducing an amount of air and/or water into the exhaust gas duct for cooling the exhaust gas during the cleaning sequence, a temperature measuring device for measuring temperature of the exhaust gas conveyed by the exhaust gas duct to the turbine, and a control system for controlling said amount of air and/or water introduced into the exhaust gas duct depending on the temperature measured by the temperature measuring device.