A vehicle exhaust system including an exhaust pipe section, a selective catalytic reduction (SCR) catalyst, and a burner assembly, connected to the exhaust pipe section at a position upstream of the selective catalytic reduction (SCR) catalyst, for pre-heating the exhaust system prior to engine start-up. The burner assembly includes a burner with a combustion chamber and a connecting tube that extends between the burner and the exhaust pipe section. A metallic mesh filter element is located inside the connecting tube and/or a catalytic washcoat is disposed on an inner surface of the connecting tube to reduce emissions of the burner assembly at start-up. The catalytic washcoat comprises a mixture of a support material and a catalyst material that chemically reacts with emissions generated by the burner to reduce the amount of burner produced emissions released from the exhaust system during pre-heating.

Disclosed is a hybrid electric torpedo that includes an igniter having a resistance, a current source, and a contactor. The torpedo includes a controller having input channels operable to receive a battery state of charge and the resistance and output channels configured to operate the contactor to control the current source of the igniter. The controller includes stored memory instructions operable upon execution to operate the contactor to conduct current through the igniter such that a temperature of the igniter increases. The contactor is operated responsive to the battery state of charge being less than a predetermined state of charge threshold and the resistance being less than a predetermined open circuit threshold.

The present inventive concept relates to a vehicle exhaust gas abatement apparatus. The vehicle exhaust gas abatement apparatus includes: an exhaust gas discharging unit having an exhaust gas discharging pass which is formed on one side thereof and along which an exhaust gas generated from an engine of a vehicle is discharged; a catalytic converter connected to a rear end of the exhaust gas discharging unit along a direction in which the exhaust gas is discharged and removing harmful components in the exhaust gas using a catalyst; and a surface combustion unit coupled to one side of the exhaust gas discharging unit and heating an inner portion of the exhaust gas discharging unit so that the exhaust gas is heated to an activation temperature or higher of the catalyst and then arrives at the catalytic converter.

Methods and systems are provided for operating a cylinder of an engine including a pre-chamber ignition system during a cold start condition. In one example, a method may include performing a post-injection in the cylinder, and then performing a pre-chamber combustion during an exhaust stroke of the cylinder. In this way, a temperature of a catalyst of the engine may be increased, which may decrease vehicle emissions during the cold start condition.

Disclosed is a hybrid electric torpedo that includes an igniter having a resistance, a current source, and a contactor. The torpedo includes a controller having input channels operable to receive a battery state of charge and the resistance and output channels configured to operate the contactor to control the current source of the igniter. The controller includes stored memory instructions operable upon execution to operate the contactor to conduct current through the igniter such that a temperature of the igniter increases. The contactor is operated responsive to the battery state of charge being less than a predetermined state of charge threshold and the resistance being less than a predetermined open circuit threshold.

The invention relates to an exhaust gas aftertreatment system for an internal combustion engine, in particular for a gasoline engine that is spark-ignited by means of spark plugs. A four-way catalytic converter and at least one three-way catalytic converter are situated in an exhaust gas system that is connected to an outlet of the internal combustion engine. An exhaust gas burner with which hot exhaust gas is introducible into the exhaust gas system directly downstream from the four-way catalytic converter is provided at an exhaust duct of the exhaust gas system. The exhaust gas burner is supplied with fresh air by a secondary air pump. The invention further relates to a method for exhaust aftertreatment of an internal combustion engine having such an exhaust gas aftertreatment system.

A vehicle exhaust system including an exhaust pipe section, a selective catalytic reduction (SCR) catalyst, and a burner assembly, connected to the exhaust pipe section at a position upstream of the selective catalytic reduction (SCR) catalyst, for pre-heating the exhaust system prior to engine start-up. The burner assembly includes a burner with a combustion chamber and a connecting tube that extends between the burner and the exhaust pipe section. A metallic mesh filter element is located inside the connecting tube and/or a catalytic washcoat is disposed on an inner surface of the connecting tube to reduce emissions of the burner assembly at start-up. The catalytic washcoat comprises a mixture of a support material and a catalyst material that chemically reacts with emissions generated by the burner to reduce the amount of burner produced emissions released from the exhaust system during pre-heating.

A method for heating an exhaust pipe in a motor vehicle, including a plurality of spark cycles performed in succession at a preset frequency, wherein each spark cycle includes injecting a-preset fuel quantity into an injection area inside of an exhaust pipe in a motor vehicle and generating at least one spark between the ends of a pair of electrodes located in proximity to the injection area in order to start combustion.

Thus, a value of an ionization current flowing between the ends of the pair of electrodes is detected following the extinction of the spark and this ionization current value is compared with a preset reference value.

Therefore, the presence of combustion in the spark cycle is determined, if the ionization current value is greater than the preset reference value, or the absence of combustion in the spark cycle, if the ionization current value is lower than the preset reference value.

An oxidizing reactor apparatus having a heat exchange reactor having an input port, an entry channel in fluid communication with the input port, an exit channel in fluid communication with the entry channel via a plurality of pores and an output port in fluid communication with the exit channel, wherein the exit channel is in thermal communication with the entry channel, an engine in fluid communication with the heat exchange reactor and a heater engaged with the heat exchange reactor to initiate and maintain the oxidation of fuel within the heat exchange reactor. The disclosed heat exchange reactor may be configured to receive engine exhaust from the engine and oxidize fuel within the engine exhaust prior to expelling the engine exhaust. The heat exchange reactor may be further configured to utilize heat released by the oxidation of un-combusted fuel to increase the temperature of the engine exhaust leaving the engine.

A motor system includes an engine having one or more cylinders, an electronic control unit, an exhaust treatment system in fluid connection with and downstream of the one or more cylinders. The exhaust treatment system includes an exhaust line, a combustion zone downstream, a combustion ignition source in the combustion zone, a catalyst downstream of an in thermal communication with the combustion zone. A method of heating a catalyst during an engine cold start and a method of initiating regular operating conditions of an engine having one or more cylinders are also described.