Volvo Truck Corporation

Intermec Technologies Corporation

Björn Henriksson

Irman Svraka

Mikael Forsberg

Åsa Högström

Sebastian Pelto-Piri

Lars Carlhammar

Jonas Jansson

Tobias Husberg

Howard H Nojiri

Paul Kershner

Anders Akesson

Pixie A Austin

A computer system comprising processing circuitry configured to: determine predicted vehicle operational information for a vehicle including at least predicted travel route for a vehicle, a predicted shutdown of a combustion engine of the vehicle along the predicted travel route, and a predicted subsequent re-start of the combustion engine; determine the topography of the predicted travel route subsequent to the predicted re-start of the combustion engine; determine a set ammonia storage level threshold of a selective catalytic reduction, SCR, catalyst arranged in an exhaust after treatment system to the combustion engine in response to the topography of the predicted travel route subsequent to the predicted combustion engine re-start; and control an injector of the exhaust after treatment system to inject a predetermined amount of reductant achieving the set ammonia storage level threshold prior to shutdown of the combustion engine.

Method for controlling at least a part of an exhaust after treatment system of a vehicle

A method for controlling the operation of an exhaust aftertreatment system (EATS) in a vehicle is described. The EATS comprises a main SCR catalyst and a pre-SCR catalyst, a pre-injector arranged upstream the pre-SCR catalyst for providing reductant, a bypass channel fluidly connected to the fluid channel and arranged to bypass the pre-SCR-catalyst and the pre-injector, and a valve configured to control a split of exhaust gases between the pre-SCR catalyst and the bypass channel. The method includes determining the amount of ammonia stored in the pre-SCR catalyst; determining the temperature of the main SCR catalyst; when the ammonia storage in the pre-SCR catalyst is below an ammonia storage threshold and the temperature of the main SCR catalyst is above a temperature threshold, injecting reductant by the pre-injector and controlling the valve to allow a flow of exhaust gases to the pre-SCR catalyst sufficient for transporting the injected reductant to the pre-SCR catalyst for increasing the ammonia storage.

Method for controlling the operation of an exhaust aftertreatment system

An aftertreatment system connected downstream an internal combustion engine arrangement for receiving exhaust gases conveyed from the internal combustion engine arrangement during operation thereof, wherein the aftertreatment system comprises first and second catalytic devices in series, wherein a gap is there between.

Aftertreatment system

A method for controlling urea injection in an exhaust aftertreatment system includes injecting urea at a flow rate upstream of the first catalytic reduction device; measuring a level of nitrogen oxides downstream of the first catalytic reduction device and upstream of the second catalytic reduction device; controlling the flow rate of the urea injection until the measured level of nitrogen oxides fulfils a predetermined condition; if the measured level of nitrogen oxides is decreasing in response to reducing the flow rate of the urea injection, reducing the flow rate of the urea injection, and controlling a flow rate of urea injection using the second urea injector upstream of the second catalytic reduction device according to the measured level of nitrogen oxides downstream of the first catalytic reduction device and upstream of the second catalytic reduction device.

Controlling urea injection in exhaust after treatment systems

An aftertreatment system () connected downstream an internal combustion engine arrangement () for receiving exhaust gases conveyed from the internal combustion engine arrangement () during operation thereof, wherein the aftertreatment system comprises first and second catalytic devices in series, wherein a gap is there between.

A printer capable of operation with linered and/or liner-less media. Powder coated media surfaces, a silicone platen roller and tear-off blade are either designed into the media path or retrofitted into a linered media capable printer. To remove the requirement for realignment between the media path extrusion and the print head a media path extrusion cover designed to snap on to the media path extrusion is utilized.

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Gothenburg, Sweden

Björn Henriksson