Volvo Truck Corporation

Björn Lundstedt

Marcus Olsén

Anders Eriksson

Styrbjörn Törngren

Marcus OLSÉN

A turbocharger system () of a combustion engine () comprises a turbocharger turbine () operable by exhaust gases, a valve () configured to control gas flow of pressurized gas from a pressurized gas reservoir () to the turbocharger turbine (), and a sensor (). Turbocharger system operation comprises injecting a test pulse of pressurized gas from the pressurized gas reservoir () to drive the turbocharger turbine () by means of controlling the valve (), detecting an impact of injected pressurized gas on the turbocharger turbine () by means of the sensor (), collecting data from the sensor (), and diagnosing the turbocharger system () by evaluating an operational response of the turbocharger turbine () as a result of the injected test pulse of pressurized gas, based on the collected data.

On-board diagnostics of a turbocharger system

The invention relates to a method for controlling a turbocharger system () fluidly connected to an exhaust manifold () of a combustion engine (). The turbocharger system () comprises a turbocharger turbine () operable by exhaust gases from said exhaust manifold, and a tank () with pressurized gas, said tank being fluidly connectable to said turbocharger turbine. The method comprises the steps of: determining an engine operational mode in which the combustion engine runs below a predetermined speed, determining an external load requiring engine torque which at said engine operational mode would cause the combustion engine to stall, and subsequently injecting pressurized gas from said tank to drive said turbocharger turbine such that the turbocharger turbine is at least partly driven by said pressurized gas, thereby preventing stalling of the combustion engine.

Method for controlling a turbocharger system for a combustion engine and a turbocharger system for use together with a combustion engine

A method for controlling a vehicle propulsion system. More particularly, the method estimates a future, upcoming driving condition and controls the vehicle propulsion system to operate the prime mover in a specific operation mode based on a determined regeneration level of a particle filter for the estimated future, upcoming driving condition.

Method for controlling a vehicle propulsion system

The invention relates to a method for controlling a turbocharger system () fluidly connected to an exhaust manifold () of a combustion engine (). The turbocharger system comprises a tank () with pressurized gas, and a turbocharger turbine () operable by exhaust gases from the exhaust manifold. The tank is fluidly connectable to the turbocharger turbine. The method comprises the steps of: determining a first operational mode in which zero fuel, or only a predetermined low amount of fuel, is injected to the combustion engine, for a predetermined time period; and, after the predetermined time period, injecting pressurized gas from the tank to drive the turbocharger turbine, such that the turbocharger turbine is activated by the pressurized gas.

Method for controlling a turbocharger system and a turbocharger system for a combustion engine

A method of conditioning a particle filter provided for receiving exhaust gases from internal combustion engine is provided and includes providing a first engine control mode and a second engine control mode, wherein in the second engine control mode at least one combustion control parameter that affects the characteristics of particles emitted together with and carried by the exhaust gases from the engine is different in relation to the first control mode such that the filling rate of the particle filter with particles is increased compared to the filling rate that would have been achieved with the first engine control mode, determining a soot loading status of the particle filter, and temporarily applying the second engine control mode to the engine based on the soot loading status.

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Lerum, Sweden

Björn Lundstedt