Volvo Car Corporation

Emitec Gesellschaft Fur Emissionstechnologie Mbh

Mats Laurell

Rolf Brück

Jan Dahlgren

Peter Sandberg

Marie Stenfeldt

Staffan Ovesson

Niklas Löfgren

Conny Johansson

An exhaust after treatment system for a vehicle includes an exhaust outlet pipe, having a first end that is connectable to a vehicle engine, for receiving exhaust gases from said vehicle engine, and having an outlet opening at a second end, arranged to eject the outlet gases, a catalytic converter, connected to the exhaust outlet pipe; and an electric heater element which is in heat conducting contact with the catalytic converter and adapted for pre-heating the catalytic converter. The heater element is positioned downstream of the catalytic converter with respect to the first end. Upon the vehicle being started, the heater element is switched on and gases are flowed from the second end, in the direction of the first end of the exhaust outlet pipe, through the catalytic converter for a pre-set period of time prior to passing exhaust gases from the engine towards the outlet opening at the second end.

Exhaust after treatment system and method for pre-heating a catalytic converter

The disclosure relates to an exhaust gas aftertreatment device for purification of exhaust gas emissions. The exhaust gas aftertreatment device is arranged in an exhaust gas passage subsequently of an internal combustion engine and includes an encapsulating portion, a first catalytic substrate and a second catalytic substrate. The second catalytic substrate may be of SCR type. The exhaust gas aftertreatment device includes a reductant injecting device, a pipe and an obstructing portion, where the reductant injecting device is arranged such that reductant is injectable within the pipe and the exhaust gas flow through the pipe can be controlled by the obstructing portion.

Pressure differentiated exhaust aftertreatment device

A catalytic converter for an internal combustion engine includes a tubular member which defines a volume within which a catalytic converter substrate is located, the volume communicates with an inlet portion for receiving exhaust gas emissions and with a first outlet portion for discharging emissions after catalytic conversion. The catalytic converter may also include a pipe member within the tubular member, which connects the inlet portion with the volume and guides emissions from the inlet portion in a first direction. The pipe member opens into a deflector member which deflects emissions into the volume in a second direction, and the catalytic converter includes a second outlet portion connected to the deflector member and a valve to control gas flow through the second outlet portion to guide emissions away from the pipe member and out of the catalytic converter prior to reaching the catalytic converter substrate when the valve is open.

Catalytic converter and exhaust-gas aftertreatment arrangement

A compact exhaust gas aftertreatment device for an internal combustion engine comprises a catalytic converter, wherein the catalytic converter comprises an encapsulating member, a pipe member, an exhaust gas guiding means and two catalytic converter substrates. The exhaust gas aftertreatment device provides very good exhaust gas mixing properties. Additionally, the exhaust gas guiding means is configured to withstand thermal stress due to exposure to hot exhaust gas emissions.

Exhaust gas aftertreatment device

An exhaust-gas aftertreatment device for an internal combustion engine includes a catalytic converter having a tubular member which defines a volume housing a catalytic converter substrate. The volume housing the catalytic converter substrate communicates with an inlet portion for receiving exhaust gas from the engine and with an outlet portion for discharging the exhaust gas after catalytic conversion thereof in the volume. The device further has a pipe member within the tubular member which connects the inlet portion with the volume in the tubular member and guides the exhaust gas from the inlet portion in a first direction of flow. The pipe member opens downstream into a deflector which deflects the exhaust gas into the volume of the tubular member in a second direction of flow other than the first direction of flow. Unburned liquid fuel contained in the exhaust gas is deposited on the deflector for later evaporation.

Growing community of inventors

Gothenburg, Sweden

Mats Laurell