Engine assembly and method for controlling an engine

An engine assembly, comprising:

• a two-stroke internal combustion engine;
• a turbocharger operatively connected to the engine, the turbocharger comprising a compressor and an exhaust turbine;
• an intake pipe fluidly connected to the engine and to the compressor of the turbocharger;
• an exhaust tuned pipe fluidly connected to the engine and to the exhaust turbine of the turbocharger;
• a temperature sensor configured to generate a signal representative of a temperature of exhaust gas flowing within the exhaust tuned pipe;
• a throttle body in fluid communication with the engine;
• a throttle valve for regulating air flowing through the throttle body into the engine;
• a throttle valve position sensor configured to sense a throttle position of the throttle valve;
• and
• a controller in communication with the throttle valve position sensor, the controller being configured to:
• determine a boost target pressure of the turbocharger based in part on the signal generated by the temperature sensor, the determined boost target pressure being greater than an actual boost pressure of the turbocharger when the temperature of the exhaust gas flowing within the exhaust tuned pipe is less than a threshold temperature,
• the boost target pressure of the turbocharger being determined based on the signal generated by the temperature sensor and the throttle position sensed by the throttle valve position sensor,
• the controller being configured to determine the boost pressure of the turbocharger by:
• accessing a predetermined dataset;
• and
• retrieving a boost target pressure correction factor from the predetermined dataset based on the signal generated by the temperature sensor and the throttle position sensed by the throttle valve position sensor;
• and
• in response to the temperature of the exhaust gas flowing within the exhaust tuned pipe being less than the threshold temperature, control the turbocharger to provide the boost target pressure to the engine by increasing the actual boost pressure in order to increase the temperature of the exhaust gas flowing within the exhaust tuned pipe.