Volvo Lastvagnar Ab

Sören Udd

Anders Eriksson

Marcus Steen

Sergi Yudanov

Edward Jobson

Sixten Berglund

Tommy Simonsson

John Korsgren

Marcus Stéen

An exhaust system includes a first SCR catalyst and a second SCR catalyst positioned downstream of the first SCR catalyst. A first injector is provided upstream of the first SCR catalyst, and a second injector is provided upstream of the second SCR catalyst. The exhaust system further includes a gaseous ammonia supply device fluidly connected to the first injector for supplying gaseous ammonia to the exhaust gas by the first injector, and an ammonia-containing reductant reservoir fluidly connected to the second injector for supplying a fluid ammonia-containing reductant, such as urea, to the exhaust gas by the second injector. The first SCR catalyst has a smaller volume than the second SCR catalyst for a fast warm-up of the first SCR catalyst.

Exhaust aftertreatment system and method for operating the system

Vehicle (A) with an internal combustion engine (), an automated transmission () coupled to the engine, and electronic control elements () which control the supply of fuel to the engine combustion chambers and recirculation of exhaust from the engine exhaust side () to its intake side (). The control elements are disposed to compute, while the vehicle is moving, future driving resistance and the time until a future shifting between gears and to control valve elements () which regulate exhaust return flow during this time to optimize fuel consumption and emissions, when the gearshifting takes place.

Method of regulating EGR in an internal combustion engine and vehicle with an engine with electronic means for applying the method

Device for catalytic treatment of a gas flow including at least one body () that includes a catalytic material. The device has a number of first openings () for either entry of gas into or exit of gas from the catalyzer body (), and a second opening () for either exit of the gas entering through the first openings or entry of gas into the catalyzer body () for subsequent exit through the first openings.

Device for catalytic treatment of a gas flow

The fuel injection system according to the invention comprises a nozzle () with an inlet and a needle (). A control piston () forms a control chamber () and abuts the needle such that a higher pressure in the control chamber urges the piston to close the nozzle. A cam-driven plunger () forms a plunger chamber () connected to the inlet of the nozzle. The system also comprises a common rail () for fuel, a feed line () and an electrically operated valve (). The valve isolates the chamber from the common rail and connects it to the line while in a third position, isolates it from both the line and the common rail in a second position, and isolates it from the line and connects it to the common rail in a first position. There are also means () for pressurizing the feed line with a relatively low fuel feed pressure and a fuel tank (). The control chamber is connected to the common rail.

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Nödinge, Sweden

Sören Udd