An exhaust purification system includes a NOx-occlusion-reduction-type catalyst that occludes NOx in exhaust in a lean state and reduces and purifies the occluded NOx in exhaust in a rich state, and a NOx purge rich control unit that executes NOx purge of reducing and purifying the occluded NOx by putting the exhaust into the rich state by fuel injection control, where a catalyst temperature of the NOx-occlusion-reduction-type catalyst is equal to or higher than a catalyst temperature threshold value and a NOx occlusion amount of the NOx-occlusion-reduction-type catalyst is equal to or higher than an NOx occlusion amount threshold value, and executes the NOx purge when the catalyst temperature is lower than a catalyst temperature threshold value.

An exhaust gas aftertreatment system for an internal combustion engine comprises an exhaust gas system with an exhaust gas channel in which at least two exhaust gas aftertreatment components for the selective, catalytic reduction of nitrogen oxides are arranged. Downstream from the first exhaust gas aftertreatment component and upstream from the second exhaust gas aftertreatment component is a burner with which the exhaust gas can be heated up before it enters the second exhaust gas aftertreatment component. Downstream from the second exhaust gas aftertreatment component for the selective, catalytic reduction of nitrogen oxides is an oxidation catalytic converter that converts unburned hydrocarbons. In a method for exhaust gas aftertreatment in an internal combustion engine having such an exhaust gas aftertreatment system, the exhaust gas from the internal combustion engine is heated up by the burner in order to heat up the second exhaust gas aftertreatment component for the selective, catalytic reduction of nitrogen oxidesas seen in the flow direction of the exhaust gas through the exhaust gas system.

A system for determining accumulation of Silicone dioxide (SiO.sub.2) in an aftertreatment system of an engine includes a pressure sensor arrangement having at least one pressure sensor therein. The pressure sensor is fluidly coupled to an exhaust pipe associated with the aftertreatment system. A controller is disposed in communication with the pressure sensor. The controller is configured to monitor back pressure of the aftertreatment system from at least one signal output by the pressure sensor arrangement and determine a level of accumulation of Sift in the aftertreatment system based on the monitored back pressure of the aftertreatment system. Based on the determination of the level of accumulation of Sift in the aftertreatment system by the controller, the controller outputs a signal to a notification device for facilitating the notification device to notify an operator of the level of accumulation of SiO.sub.2 in the aftertreatment system.

An in-vehicle controller includes processing circuitry. The processing circuitry stops injection of fuel under a preset fuel cutoff condition including a lockup clutch being in an engagement state. A request for raising heating performance of a heater core is a heater actuation request, and an amount of particulate matter deposited on a filter is a deposition amount. The processing circuitry controls the lockup clutch in a disengagement state when a heater actuation request is generated and the deposition amount is less than a preset deposition amount threshold. The processing circuitry controls the lockup clutch in the engagement state when the heater actuation request is generated and the deposition amount is greater than or equal to the preset deposition amount threshold.

An emission control device for an internal combustion engine is configured to perform a particulate matter trap function of trapping, with a particulate filter, particulate matter contained in exhaust gas which flows in an exhaust passage of the internal combustion engine. The emission control device includes a controller. The controller is configured to calculate a particulate matter accumulation amount, which is a total amount of particulate matter trapped by the particulate filter based on an operation condition of the internal combustion engine. The controller is configured to stop calculating the particulate matter accumulation amount when the particulate matter trap function is not functioning.

A cleaning system for removal of contaminants from a surface of a vehicle component exposed to a gas or fluid flow, the cleaning system comprising: an excitation device adapted to be attached to the vehicle component in the vicinity of the surface exposed to contaminants, wherein the excitation device is configured to cause the surface to mechanically vibrate by transferring a vibrational excitation to the surface; wherein the frequency of the vibrational excitation is controllable to be based on the configuration of the vehicle component as well as other modelled/measured parameters.

A system for determining accumulation of Silicone dioxide (SiO.sub.2) in an aftertreatment system of an engine includes a pressure sensor arrangement having at least one pressure sensor therein. The pressure sensor is fluidly coupled to an exhaust pipe associated with the aftertreatment system. A controller is disposed in communication with the pressure sensor. The controller is configured to monitor back pressure of the aftertreatment system from at least one signal output by the pressure sensor arrangement and determine a level of accumulation of SiO.sub.2 in the aftertreatment system based on the monitored back pressure of the aftertreatment system. Based on the determination of the level of accumulation of SiO.sub.2 in the aftertreatment system by the controller, the controller outputs a signal to a notification device for facilitating the notification device to notify an operator of the level of accumulation of SiO.sub.2 in the aftertreatment system.

A method for adapting a characteristic curve of a nitrogen oxide sensor of a combustion engine with exhaust gas recirculation having the first nitrogen oxide sensor upstream of an SCR catalytic converter and a second nitrogen oxide sensor downstream of the SCR catalytic converter includes determining that a particle filter is in a regeneration phase, increasing the exhaust gas recirculation rate, interrupting the supply of urea by a urea injection device, acquiring first nitrogen oxide values from signals generated by the first nitrogen oxide sensor, determining that the first nitrogen oxide values are within a first nitrogen oxide interval, acquiring values from second nitrogen oxide signals generated by the second nitrogen oxide sensor, and determining that the second nitrogen oxide values are within a second nitrogen oxide interval, and adapting the characteristic curve of the first nitrogen oxide sensor by the second nitrogen oxide values.

Systems and methods for optimizing a performance variable for an engine system. The method includes applying constraints of manipulated variables as well as performance variables, mechanical constraints and other engine responses to response models. The response models each represent a piecewise linear relationship between the manipulated variables and other engine responses including performance variables and constraints. The method also comprises determining an optimal target for each of the manipulated variables by using a quasi-simplex optimization process on the response models. The optimal targets of the manipulated variables correspond to an optimal value of the performance variable.

An apparatus for detecting urea deposits in an exhaust pipe of an internal combustion engine is provided, where the urea is introduced into the exhaust pipe in an aqueous urea solution via a nozzle. The apparatus comprises at least one radiation receiver which, in use, is located within the exhaust pipe downstream of the nozzle. The apparatus further comprises an electronic control unit in communication with the receiver, wherein the receiver communicates radiation data to the control unit which allows the control unit to establish whether deposits have formed within the exhaust pipe. A control valve is also provided which controls flow of the solution to the nozzle in response to signals from the control unit. A method of detecting urea deposits in an exhaust pipe of an internal combustion engine is also provided, as in an automotive vehicle incorporating the aforementioned apparatus.