A system, method, and apparatus for decreasing harmful emissions is provided. The system includes an aftertreatment system comprising an exhaust conduit that directs exhaust gas from an engine system; a heater coupled to the aftertreatment system and configured to provide heat; and a controller coupled to the heater. The controller is configured to: determine whether the engine system is idling; in response to determining that the engine system is idling, determine whether a conversion efficiency of the engine system is greater than a threshold value; in response to determining that the conversion efficiency is greater than the threshold value, determine whether a temperature regarding the aftertreatment system is greater than a threshold temperature; and in response to determining that the temperature of the aftertreatment system is greater than the threshold temperature, at least one of disable or partially disable the heater.

Methods and systems are provided for regenerating an after-treatment system of a vehicle. A first operational parameter of a first component of the after-treatment system is monitored and a second operational parameter, different to the first operational parameter, of a second component of the after-treatment system is monitored. It is determined if the first operational parameter of the first component is outside a first threshold range and if the second operational parameter is approaching a second threshold and, in response to the first operational parameter being outside the first threshold range and the second operational parameter being within the second threshold range, a regeneration sequence of the after-treatment system configured to regenerate at least the first component of the after-treatment system is initiated.

Methods and systems are provided for an aftertreatment system. In one example, a method includes adjusting operation of an electric heating element based on an exhaust mass flow. The method further includes estimating the electric heating element based on the exhaust mass flow and a temperature of exhaust gas upstream of the electric heating element and downstream of a catalyst.

The disclosure relates to an exhaust gas aftertreatment system for treating exhaust gas from an internal combustion engine. The exhaust gas aftertreatment system includes an exhaust gas catalyst that includes an exhaust gas catalysis portion and a heating element. The heating element is configured to heat the exhaust gas catalysis portion. The exhaust gas aftertreatment system also includes: a voltage source which supplies the heating element with electric power for heating the heating element, and a DC to DC converter which is configured to control the electric power supply from the voltage source to the heating element. The exhaust gas aftertreatment system also includes a control unit which is configured to control the DC to DC converter based on the required electric power to heat the exhaust gas catalysis portion.

An aftertreatment system includes a selective catalytic reduction (SCR) system, a heater, and a controller that determines a rise in temperature of exhaust gas at an outlet of the heater for a plurality of power levels, predicts a first temperature of the exhaust gas at the outlet of the heater based on the rise in temperature, predicts a second temperature of the exhaust gas at a location of the SCR system based on the first temperature, compares the second temperature for each of the plurality of power levels with a target temperature of the exhaust gas at the inlet of the SCR system, selects one of the plurality of power levels based on the comparison, and adjusts operation of the heater based on the selected one of the plurality of power levels to achieve the target temperature of the exhaust gas at the inlet of the SCR system.

A method for providing a power supply for at least one electrically heatable catalyst of a motor vehicle situated in an exhaust gas tract, wherein the motor vehicle comprises a first battery, by means of which a first voltage U.sub.1 is generated, and a second battery, by way of which a second voltage U.sub.2 is generated, wherein the at least one catalyst during a start phase immediately following the start of an internal combustion engine of the motor vehicle is supplied by a power P.sub.1 provided by the first battery such that the voltage U.sub.1 of the first battery is imposed on the at least one catalyst, wherein the at least one catalyst is additionally supplied during the start phase by a power P.sub.2 provided by the second battery such that the voltage U.sub.2 of the second battery is transformed by a DC converter to the value of the voltage U.sub.1 which is imposed on the at least one catalyst.

An electrically heated catalyst device has a catalyst that purifies exhaust gas from an engine, and is configured to heat the catalyst with electric power that is supplied from an electric storage device. A current sensor detects a current that is supplied to the electrically heated catalyst device. A current sensor detects an input/output current of the electric storage device. A controller executes failure determination control to determine whether the current sensor has a failure. In the failure determination control, the controller estimates a current that is supplied to the electrically heated catalyst device using a detection value of the current sensor and compares the estimated current with a detection value of the current sensor to determine whether the current sensor has a failure.

A control system includes an electric heater disposed within an exhaust fluid flow pathway, and a control device for receiving at least one input selected from the group consisting of temperature readings along the exhaust fluid flow pathway, alternator power/current/voltage, battery power/current/voltage/state of charge, IAT and EAT profiles, mass flow rate of an exhaust fluid flow, NH.sub.3 slip, TCR characteristics of the heater, alternator speed, engine speed, state of aging of an aftertreatment component, state of aging of engine, aging degradation characteristics, a dosing rate and a temperature of DEF, NH.sub.3 storage condition of aftertreatment system, an ambient temperature, and combinations thereof. The control device modulates power to the heater based on the at least one input such that the heater provides different power output as a function of the at least one input and a continuously variable power output during operation of the exhaust system.

An electrically heated support according to the present invention includes: a pillar shaped honeycomb structure, the honeycomb structure including an outer peripheral wall and a partition wall, the partition wall defining a plurality of cells, each of the cells penetrating from one end face to other end face to form a flow path; and a pair of electrode terminals provided on a surface of the outer peripheral wall. In a cross section of the honeycomb structure, the honeycomb structure includes: a plurality of first slits arranged, the first slits being configured to define an energizing path; and a least one second slit located in the energizing path, the second slit extending in a different direction from that of the first slits. A length of the energizing path from one electrode terminal to the other electrode terminal is longer than a diameter of the honeycomb structure.

A control system for a hybrid vehicle configured to prevent a reduction in the purifying performance of the catalyst in a predetermined operating mode. An operating mode of the hybrid vehicle can be selected from a first hybrid vehicle mode, a second hybrid vehicle mode, and a fixed mode. A controller that is configured to restrict a shifting operation between the first hybrid vehicle mode and the second hybrid vehicle mode via the fixed mode, when the purifying device is being warmed or the purifying device has to be warmed.