Abstract: A battery outgassing filter system is provided. The system includes a battery cell, an external casing encapsulating the battery cell and including a casing vent, and an outgassing filter disposed upon the casing vent and including a filter element including a first filter element portion operable to contain a first size of particulate matter and a second filter element portion operable to contain a second size of particulate matter relatively smaller than the first size of particulate matter.

Abstract: A battery outgassing filter system is provided. The system includes a battery cell, an external casing encapsulating the battery cell and including a casing vent, and an outgassing filter disposed upon the casing vent and including a filter element including a first filter element portion operable to contain a first size of particulate matter and a second filter element portion operable to contain a second size of particulate matter relatively smaller than the first size of particulate matter.

Abstract: A vehicle particulate matter contamination recovery system includes a particulate matter filter receiving exhaust gas from an engine. A particulate matter sensor is positioned downstream of the particulate matter filter, the particulate matter sensor collecting a non-combustible contaminant on a circuit of the particulate matter sensor and generating a current indicating presence of the non-combustible contaminant. A total volume of water collected during multiple cold start operations of the engine is passed onto the sensor acting to at least partially dissolve the non-combustible contaminant. The particulate matter sensor is operated in a remedial action mode of operation having no voltage applied to the circuit of the particulate matter sensor until a quantity of the cold start operations corresponding to the total volume of water is reached.

Abstract: A method for mitigating against failure of a particulate matter sensor of an automobile vehicle includes: determining if a key-off event is present, identifying an engine is off in a vehicle after-run mode; defining when local environmental conditions are outside of mechanical limits of a particulate matter (PM) sensor; identifying input values to reverse the local environmental conditions of the PM sensor; and controlling operation of a heating element of the PM sensor to achieve the input values to reverse the local environmental conditions during the vehicle after-run mode.

Abstract: A vehicle particulate matter contamination recovery system includes a particulate matter filter receiving exhaust gas from an engine. A particulate matter sensor is positioned downstream of the particulate matter filter, the particulate matter sensor collecting a non-combustible contaminant on a circuit of the particulate matter sensor and generating a current indicating presence of the non-combustible contaminant. A total volume of water collected during multiple cold start operations of the engine is passed onto the sensor acting to at least partially dissolve the non-combustible contaminant. The particulate matter sensor is operated in a remedial action mode of operation having no voltage applied to the circuit of the particulate matter sensor until a quantity of the cold start operations corresponding to the total volume of water is reached.

Abstract: A method for mitigating against failure of a particulate matter sensor of an automobile vehicle includes: determining if a key-off event is present, identifying an engine is off in a vehicle after-run mode; defining when local environmental conditions are outside of mechanical limits of a particulate matter (PM) sensor; identifying input values to reverse the local environmental conditions of the PM sensor; and controlling operation of a heating element of the PM sensor to achieve the input values to reverse the local environmental conditions during the vehicle after-run mode.

Abstract: An aftertreatment (AT) system for an exhaust gas stream of an internal combustion engine may comprise a selective catalytic reduction (SCR) device, a particulate filter (PF) device, a reducing agent injection system configured to inject a reducing agent into the exhaust gas stream at a location upstream of the SCR device. A reducing agent injection rate control system may be embedded in an engine control module and may be configured to calculate and output a reducing agent injection rate signal and to apply the injection rate signal to the injection system to control the amount of reducing agent injected into the exhaust gas stream. Calculation of the reducing agent injection rate signal may involve applying a dynamic weighting factor to predetermined minimum and maximum allowable injection rates to obtain a weighted injection rate based upon operating parameters of the exhaust gas stream and/or the AT system.

Abstract: Provided is a method for controlling a vehicle exhaust gas treatment system, wherein the system includes an engine and a selective catalytic reduction device configured to receive exhaust gas from the engine and reductant from an injector. The method comprises determining a need for a reductant injection, determining a need for reductant injector noise abatement, and subsequently conducting one or more reductant injection events during one or more engine combustion events. A vehicle combustion event comprises combustion of fuel within a cylinder of the ICE. Determining a need for reductant injector noise abatement comprises determining if an engine speed is below a threshold, if a speed of the vehicle is below a threshold, if a decibel level of a vehicle audio system is below a threshold, or if a hands-free telephone system is being utilized by a passenger of the vehicle. The engine can be a diesel engine.

Abstract: Provided is a method for controlling a vehicle exhaust gas treatment system, wherein the system includes an engine and a selective catalytic reduction device configured to receive exhaust gas from the engine and reductant from an injector. The method comprises determining a need for a reductant injection, determining a need for reductant injector noise abatement, and subsequently conducting one or more reductant injection events during one or more engine combustion events. A vehicle combustion event comprises combustion of fuel within a cylinder of the ICE. Determining a need for reductant injector noise abatement comprises determining if an engine speed is below a threshold, if a speed of the vehicle is below a threshold, if a decibel level of a vehicle audio system is below a threshold, or if a hands-free telephone system is being utilized by a passenger of the vehicle. The engine can be a diesel engine.

Abstract: A method includes receiving, at a controller having one or more processors, one or more measured parameters, each measured parameter related to a temperature that affects a temperature of a reductant injector of an exhaust system of an engine. The method includes determining a resistance of a coil of the reductant injector. The method includes estimating the temperature of the reductant injector based on (i) the one or more measured parameters and (ii) the coil resistance. The method also includes controlling a duty cycle of the reductant injector based on the estimated temperature of the reductant injector.

Abstract: A method includes determining, at a controller having one or more processors, whether an ambient temperature is less than a predetermined temperature indicative of frozen reductant in an exhaust system of an engine. The method includes determining an injector thaw period for a reductant injector in the exhaust system when the ambient temperature is less than the predetermined temperature. The method includes determining a tank thaw period for a reductant tank associated with the exhaust system, the reductant tank being configured to supply reductant to the reductant injector. The method also includes controlling (i) a heater to heat the reductant tank for the tank thaw period and (ii) a current provided to the reductant injector for the injector thaw period, such that the tank thaw period and the injector thaw period end at a same time.

Abstract: A method includes determining, at a controller having one or more processors, whether an ambient temperature is less than a predetermined temperature indicative of frozen reductant in an exhaust system of an engine. The method includes determining an injector thaw period for a reductant injector in the exhaust system when the ambient temperature is less than the predetermined temperature. The method includes determining a tank thaw period for a reductant tank associated with the exhaust system, the reductant tank being configured to supply reductant to the reductant injector. The method also includes controlling (i) a heater to heat the reductant tank for the tank thaw period and (ii) a current provided to the reductant injector for the injector thaw period, such that the tank thaw period and the injector thaw period end at a same time.

Abstract: A method includes receiving, at a controller having one or more processors, one or more measured parameters, each measured parameter related to a temperature that affects a temperature of a reductant injector of an exhaust system of an engine. The method includes determining a resistance of a coil of the reductant injector. The method includes estimating the temperature of the reductant injector based on (i) the one or more measured parameters and (ii) the coil resistance. The method also includes controlling a duty cycle of the reductant injector based on the estimated temperature of the reductant injector.