Systems and apparatuses include a circuit structured to receive information indicative of a catalyst health, determine a catalyst health management criteria has been met based on the information, determine a catalyst loading based on the information and the catalyst health management criteria being met, and compare the determined catalyst loading to a predetermined loading limit. A notification circuit is coupled to the circuit and structured to provide a notification when the determined catalyst load exceeds the predetermined loading limit.

Systems, apparatuses, and methods for monitoring a catalyst health parameter are provided. A system includes one or more processing circuits having one or more memory devices coupled to one or more processors. The one or more memory devices store instructions that, when executed by the one or more processors, cause the one or more processors to: receive information indicative of at least one of a temperature of exhaust gas entering the aftertreatment system, a time at idle, or a mass flow of exhaust gas; determine a catalyst health management criteria based on the information; determine a catalyst health indicator based on the catalyst health management criteria being met; compare the determined catalyst health indicator to a predetermined health threshold criteria; and provide a notification based on the determined catalyst health indicator being less than the predetermined health threshold criteria.

A computer-implemented method for determining whether a reductant (e.g. urea) injector is clogged is provided. The method includes receiving data indicative of an injector duty cycle and a pump duty cycle. Using a trained machine learning module, at least a first value is calculated, indicative of a probability of the injector being clogged. The method further includes providing, based on the first value, an indication of whether the reductant injector is clogged. A device for providing the indication using the method, a computer program, a reductant injector system, and e.g. a combustion engine including such a reductant injector system are also provided.

An ECU stores and holds in a memory unit NOx information which is information concerning NOx in an exhaust gas flowing through an exhaust system of an onboard engine of a vehicle or NOx purification by a catalyst placed in the exhaust system. The ECU includes a parameter acquisition unit that acquires an NOx parameter, which is an outflow quantity of NOx flowing out to a downstream side of the catalyst or a correlation value correlating to the outflow quantity of NOx, according to a working state of the engine, an integrated value computation unit that computes a parameter integrated value by integrating NOx parameters acquired by the parameter acquisition unit, and a storage processing unit that stores in the memory unit the parameter integrated value as the NOx information.

Disclosed is a method for use in a process of selective catalytic reduction (SCR) after-treatment of an exhaust gas of an exhaust gas stream, where the process comprises the reduction of nitrogen oxides of the exhaust gas stream through the use of a reducing agent derived from an additive. The disclosed method comprises: defining an integrand to be the difference between the rate of injection of the additive and the rate of evaporation of the additive to the reducing agent multiplied by a coefficient (s), wherein the value of the coefficient (s) is between zero and one; producing an integral controller output proportional to the integral of the integrand with time; requesting a countermeasure based on the integral controller output to counteract solid deposits derived from the additive.

The disclosure relates to a DPF regeneration trigger control method and terminal device, and a storage medium. The method includes: setting an active trigger differential pressure and an initial trigger differential pressure; and controlling, according to a relationship between a differential pressure of the DPF collected in real time during a vehicle travelling process and and the active trigger differential pressure and a relationship between the differential pressure of the DPF and the initial trigger differential pressure, the vehicle to actively start DPF regeneration, to trigger passive DPF regeneration, or not to start DPF regeneration; otherwise, controlling the vehicle to actively start DPF regeneration. According to the disclosure, by setting a flexible trigger interval, there is a tolerance interval of differential pressure, so that fuel consumption of the diesel engine can be reduced, and the economy is improved.

A work machine is capable of detecting an abnormality in the amount of soot in exhaust gas in an exhaust pipe upstream of an exhaust gas aftertreatment device. The work machine includes: an exhaust gas sensor which detects the amount of soot contained in exhaust gas between an engine and an exhaust gas aftertreatment device and generates a soot amount detection signal; and a controller into which the detection signal is input. The controller includes an abnormality judgment section that makes an abnormality judgment on whether or not the detected soot amount is abnormal, and a threshold setting section that sets a soot amount threshold that is a threshold for making the abnormality judgment. The abnormality judgment section judges an abnormality when the value of the soot amount corresponding to the soot amount detection signal is larger than the soot amount threshold.

Systems and apparatuses include a circuit structured to receive information indicative of a catalyst health, determine a catalyst health management criteria has been met based on the information, determine a catalyst loading based on the information and the catalyst health management criteria being met, and compare the determined catalyst loading to a predetermined loading limit. A notification circuit is coupled to the circuit and structured to provide a notification when the determined catalyst load exceeds the predetermined loading limit.

The separation efficiency of carbon dioxide is improved by making the temperature of exhaust gas further low. An exhaust gas purification apparatus for an internal combustion engine includes a first heat exchanger arranged in an exhaust passage of an internal combustion engine and configured to carry out heat exchange between outside air and exhaust gas of the internal combustion engine, a second heat exchanger arranged in the exhaust passage and configured to carry out heat exchange between a circulating heating medium and the exhaust gas, and a carbon dioxide separator arranged in the exhaust passage at the downstream side of the first heat exchanger and the second heat exchanger and configured to separate carbon dioxide from the exhaust gas.

A work machine is capable of detecting an abnormality in the amount of soot in exhaust gas in an exhaust pipe upstream of an exhaust gas aftertreatment device. The work machine includes: an exhaust gas sensor which detects the amount of soot contained in exhaust gas between an engine and an exhaust gas aftertreatment device and generates a soot amount detection signal; and a controller into which the detection signal is input. The controller includes an abnormality judgment section that makes an abnormality judgment on whether or not the detected soot amount is abnormal, and a threshold setting section that sets a soot amount threshold that is a threshold for making the abnormality judgment. The abnormality judgment section judges an abnormality when the value of the soot amount corresponding to the soot amount detection signal is larger than the soot amount threshold.