A method for the quality assurance of exhaust gas behavior in a motor vehicle, particularly in a hybrid vehicle, includes monitoring an on-board-diagnosis function; providing a journey counter a diagnosis counter, and a nominal diagnosis frequency value; incrementing the journey counter following the beginning of a driving cycle; generating an actual diagnosis frequency value using a combination of the diagnosis counter and the drive counter; and establishing a difference between the nominal diagnosis frequency value and the actual diagnosis frequency value. If the difference falls short of a threshold: a control method is selected, which is designed to successfully complete a currently running OBD of the OBD function and to initiate and complete a non-running OBD. Following the completion of the OBD of the OBD function, the diagnosis counter is incremented and the motor control restored to an original motor control.

When a user requests start-up of an internal combustion engine while PM removal control is in execution or immediately after execution of the PM removal control is completed, an electronic control unit informs the user of the vehicle of a first alarm, so that the user recognizes that the internal combustion engine cannot be started up immediately. This makes it possible to suppress the discomfort caused because the internal combustion engine is not started up.

There is provided an exhaust treatment device for a diesel engine that can prevent unnecessary alarm for ash deposition from being issued. In the exhaust treatment device, a timer measures integrated time of a state of non-regenerative operation which ranges from an end of DPF regeneration to a next time point where the differential pressure reaches a regeneration request value. A counter acquires the short interval count if the integrated time is a short interval shorter than a predetermined decision time. An alarm device issues an alarm if the consecutive short interval count reaches a predetermined plural necessary count for alarm. A short interval count having been already acquired is preferably reset to 0 if the integrated time of the state of non-regenerative operation is a long interval, not shorter than a predetermined decision time, before the short interval count reaches the predetermined necessary count for alarm.

An aftertreatment system comprises an aftertreatment component structured to decompose constituents of an exhaust gas produced by an engine. A reductant insertion assembly is fluidly coupled to the aftertreatment component and configured to insert a reductant therein. A controller is operatively coupled to the reductant insertion assembly and configured to instruct the reductant insertion assembly to insert the reductant into the aftertreatment component for a first insertion time between first time intervals. The controller determines an operating condition of the engine, and determines if the operating condition satisfies a predetermined condition. In response to the predetermined condition being satisfied, the controller instructs the reductant insertion assembly to insert the reductant into the aftertreatment component for a second insertion time between second time intervals. The second insertion time is longer than the first insertion time.

A method for checking a load condition of a particulate filter in an exhaust line of an internal combustion engine, wherein the exhaust line comprises at least the particulate filter, a first lambda sensor that is arranged upstream from the particulate filter, and a second lambda sensor that is arranged downstream from the particulate filter, includes at least the following steps: introducing an exhaust gas with an excess of oxygen into the exhaust line upstream from the first lambda sensor, there being a temperature of at least 500 C. in the particulate filter; detecting the excess of oxygen by the first lambda sensor at a first time; detecting the excess of oxygen by the second lambda sensor at a second time; and determining a load condition of the particulate filter from a time difference between the first time and the second time. The invention further relates to an exhaust system of a motor vehicle.

An auxiliary system with purge control automatically supplies diesel exhaust fluid (DEF) to an onboard DEF tank of a diesel engine to enable prolonged unattended operation. The system includes an auxiliary DEF tank, an auxiliary DEF supply line, a controller, a pump, an air inlet, and a three-way valve configured to switch the pump inlet between the auxiliary DEF tank and air. In response to low-level DEF, the pump delivers DEF through the supply line to replenish the onboard DEF tank. The controller may automatically calculate onboard DEF tank volume based on the delivered volume of DEF, and DEF level data received from an ECM, to enable replenishment control regardless of engine make and model. In response to high-level DEF, engine stoppage, or other system fault, the controller switches the valve to air and runs the pump for a predetermined time to purge DEF from the supply line. The auxiliary system may be skid-mounted, portable, and configured to supply DEF to multiple diesel engines.

A method for determining a loading state of a particle filter of a motor vehicle. The method includes detecting a first differential pressure across the particle filter, determining a second differential pressure across the particle filter, and subjecting each of the first differential pressure and the second differential pressure to a filtering process in order to determine a filtered first differential pressure and a filtered second differential pressure. The method further includes subjecting each of the first filtered differential pressure and the second filtered differential pressure to an integration process in order to determine a first integral of the filtered first differential pressure and a second integral of the filtered second differential pressure, synchronizing the first integral and the second integral with one another to provide synchronized integrals, and determining, as the loading state, a ratio which is dependent on the synchronized integrals.

An auxiliary system with purge control automatically supplies diesel exhaust fluid (DEF) to an onboard DEF tank of a diesel engine to enable prolonged unattended operation. The system includes an auxiliary DEF tank, an auxiliary DEF supply line, a controller, a pump, an air inlet, and a three-way valve configured to switch the pump inlet between the auxiliary DEF tank and air. In response to low-level DEF, the pump delivers DEF through the supply line to replenish the onboard DEF tank. The controller may automatically calculate onboard DEF tank volume based on the delivered volume of DEF, and DEF level data received from an ECM, to enable replenishment control regardless of engine make and model. In response to high-level DEF, engine stoppage, or other system fault, the controller switches the valve to air and runs the pump for a predetermined time to purge DEF from the supply line.

A system includes an exhaust aftertreatment system including a particulate filter and a controller. The controller is configured to: receive a particulate filter regeneration event trigger; receive information, the information comprising a temperature regarding the particulate filter; determine the temperature regarding the particulate filter is below a temperature threshold associated with a particulate filter regeneration event; and responsive to determining the temperature regarding the particulate filter is below the temperature threshold, command the engine to operate in a cylinder deactivation mode, whereby at least one cylinder of a plurality of cylinders of the engine is deactivated.

A system includes a processing circuit having a memory coupled to one or more processors, the memory storing instructions therein that, when executed by the one or more processors, cause the one or more processors to: receive engine operational data, the engine operational data indicative of at least one engine operational condition; determine, based on the engine operational data, an estimated exhaust temperature; generate, based on the estimated exhaust temperature and a finite time horizon, a forecasted exhaust temperature; correct the forecasted exhaust temperature based on a downpipe model to generate a first inlet temperature profile corresponding to a first component of the exhaust aftertreatment system; and generate, based on the first inlet temperature profile, a second inlet temperature profile corresponding to a second component of the exhaust aftertreatment system.