Abstract: The reduction of a NOx trap upon engine shutdown is disclosed. One disclosed embodiment comprises adjusting a timing of creating a reductive environment in the exhaust conduit upstream of the lean NOx trap based upon the determined engine stop position. The creation of a reductive environment in the exhaust conduit upstream of the lean NOx trap may help to at least partially reactivate the lean NOx trap during engine shutoff.

Abstract: A method to supply fuel to an engine of a vehicle is provided. The method includes adjusting a direct injection of fuel into a cylinder of the engine based on whether the vehicle is in a pre-delivery state. In one example, the method includes reducing an amount of fuel in a post injection to reduce cylinder bore wetting effects and lubricant dilution during the engine cold start. After pre-delivery, a normal post injection schedule may be used to reduce emissions.

Abstract: The reduction of a NOx trap upon engine shutdown is disclosed. One disclosed embodiment comprises adjusting a timing of creating a reductive environment in the exhaust conduit upstream of the lean NOx trap based upon the determined engine stop position. The creation of a reductive environment in the exhaust conduit upstream of the lean NOx trap may help to at least partially reactivate the lean NOx trap during engine shutoff.

Abstract: A method to supply fuel to an engine of a vehicle is provided. The method includes adjusting a direct injection of fuel into a cylinder of the engine based on whether the vehicle is in a pre-delivery state. In one example, the method includes reducing an amount of fuel in a post injection to reduce cylinder bore wetting effects and lubricant dilution during the engine cold start. After pre-delivery, a normal post injection schedule may be used to reduce emissions.

Abstract: The reduction of a NOx trap upon engine shutdown is disclosed. One disclosed embodiment comprises adjusting a timing of creating a reductive environment in the exhaust conduit upstream of the lean NOx trap based upon the determined engine stop position. The creation of a reductive environment in the exhaust conduit upstream of the lean NOx trap may help to at least partially reactivate the lean NOx trap during engine shutoff.

Abstract: A method to supply fuel to an engine of a vehicle is provided. The method includes adjusting a direct injection of fuel into a cylinder of the engine based on whether the vehicle is in a pre-delivery state. In one example, the method includes reducing an amount of fuel in a post injection to reduce cylinder bore wetting effects and lubricant dilution during the engine cold start. After pre-delivery, a normal post injection schedule may be used to reduce emissions.

Abstract: A system and method may be provided for operating a system having an engine with an emission control system, the emission control system including a lean NOx trap and a particulate filter, where after lean exhaust gas air-fuel ratio regeneration of the particulate filter at an elevated regeneration temperature, a rich or intermittently rich exhaust air-fuel ratio is provided for a duration lasting until LNT temperature falls to a minimum threshold, where said rich or intermittently rich operation reactivates catalysts in the LNT and reverses deactivation caused by the elevated temperature lean operation associated with previous particulate filter regeneration.

Abstract: An aftertreatment system for use in a lean burn engine is disclosed. In one embodiment, the aftertreatment system includes a first catalyst in communication with an exhaust stream from the engine; a selective catalytic reduction catalyst in communication with the exhaust stream and positioned downstream of the first catalyst; and a lean NOx trap in communication with the exhaust stream and positioned downstream of the selective catalytic reduction catalyst; with the proviso that the first catalyst is not a selective catalytic reduction catalyst. A method for treating lean burn engine exhaust gases using the aftertreatment system is also disclosed.

Abstract: A vehicle includes an engine, a booster, an exhaust gas sensor and a self-calibration arrangement for the exhaust gas sensor. When sensor calibration check is desired, a controlling unit opens a valve in order to subject a sensing element of the sensor to a supply of gas having a known gas concentration. Gas concentration signals from the sensor are compared with known concentration values, with the results being used to re-calibrate the sensor. The supply of gas can be received directly from the booster or from an optional reservoir. The invention is particularly applicable for use with a universal exhaust gas oxygen sensor in a vehicle powered by a diesel engine.

Abstract: A method to supply fuel to an engine of a vehicle is provided. The method includes adjusting a direct injection of fuel into a cylinder of the engine based on whether the vehicle is in a pre-delivery state. In one example, the method includes reducing an amount of fuel in a post injection. In other examples, the method includes changing a timing of a post injection. In still other examples, the method includes changing an amount and/or a timing of a main injection of fuel, or suppressing a post injection. By using a modified post injection schedule during pre-delivery, cylinder bore wetting effects may be reduced. After pre-delivery, a normal post injection schedule may be used to reduce emissions. Pre-delivery may be identified in a variety of ways: based on a number of miles driven, a maximum vehicle speed, an engine run time, or combinations thereof, as examples. Further, a vehicle retailer may actuate a delivery-indicating signal once the vehicle has been delivered.

Abstract: The reduction of a NOx trap upon engine shutdown is disclosed. One disclosed embodiment comprises detecting an engine shutoff, determining an engine stop position, and creating a reductive environment in the exhaust conduit upstream of the lean NOx trap at a time based upon the determined engine stop position. The creation of a reductive environment in the exhaust conduit upstream of the lean NOx trap may help to at least partially reactivate the lean NOx trap during engine shutoff.

Abstract: An EGR cooling system is provided. The EGR cooling system comprising a plurality of EGR coolers configured to cool the EGR to a plurality of successively lower temperatures, where at least one of the plurality of EGR coolers includes a finned EGR cooler that comprises a plurality of channels for dissipating heat in the EGR, the plurality of channels increasing heat transfer surface area while having sufficient fin spacing to avoid clogging. The EGR cooling system may further comprise a catalyst configured to remove particle matters and/or hydrocarbons from the EGR, the catalyst positioned upstream of at least one of the plurality of EGR coolers.

Abstract: A system and method may be provided for operating a system having an engine with an emission control system, the emission control system including a lean NOx trap and a particulate filter, where after lean exhaust gas air-fuel ratio regeneration of the particulate filter at an elevated regeneration temperature, a rich or intermittently rich exhaust air-fuel ratio is provided for a duration lasting until LNT temperature falls to a minimum threshold, where said rich or intermittently rich operation reactivates catalysts in the LNT and reverses deactivation caused by the elevated temperature lean operation associated with previous particulate filter regeneration.

Abstract: A method of driving the electrodes of a dielectric barrier discharge device. The driving signal is a pulsed signal where the pulses have alternating polarities. In one embodiment, the pulse signal includes groups of opposite polarity pulses where a second pulse in each group immediately follows a first pulse and where the group of pulses are spaced from each other. This allows the charge trapped on the surface of the dielectric barrier of the device to be added power to the electric field generated by the following, opposite polarity pulse.

Abstract: Cyclic variation in combustion of a lean burning engine is reduced by detecting an engine combustion event output such as torsional acceleration in a cylinder (i) at a combustion event (k), using the detected acceleration to predict a target acceleration for the cylinder at the next combustion event (k+1), modifying the target output by a correction term that is inversely proportional to the average phase of the combustion event output of cylinder (i) and calculating a control output such as fuel pulse width or spark timing necessary to achieve the target acceleration for cylinder (i) at combustion event (k+1) based on anti-correlation with the detected acceleration and spill-over effects from fueling.

Abstract: An internal combustion engine has a system, including diagnostics, for providing oxygen enriched air so as to control emissions of unburned hydrocarbons and carbon monoxide. The system includes the capability of determining whether the oxygen enrichment system is providing suitable mass flow to the engine and whether oxygen enrichment is available according to the specifications of the enrichment device.