Patent application number | Description | Published |
20090272099 | APPARATUS, SYSTEM, AND METHOD FOR DETERMINING THE DEGRADATION OF AN SCR CATALYST - According to one representative embodiment, an apparatus for determining the degradation of a selective catalytic reduction (SCR) catalyst of an engine exhaust aftertreatment system includes a system properties module configured to store at least one system dynamics property value of the exhaust system at a first time and receive the at least one system dynamics property value of the exhaust aftertreatment system at a second time subsequent to the first time. The apparatus also includes a system dynamics module configured to determine a storage capacity of the SCR catalyst based on a comparison between the at least one system dynamic property value at the first time and the at least one system dynamic property value at the second time. Additionally, the apparatus includes an SCR catalyst degradation factor module configured to determine an SCR catalyst degradation factor based at least partially on the storage capacity of the SCR catalyst. | 11-05-2009 |
20090272101 | APPARATUS, SYSTEM, AND METHOD FOR CONTROLLING AMMONIA SLIP FROM AN SCR CATALYST - Various embodiments of an apparatus, system, and method are disclosed for reducing NO | 11-05-2009 |
20090272102 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST - Various embodiments of an apparatus, system, and method are disclosed for reducing NO | 11-05-2009 |
20090272104 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST USING AMMONIA STORAGE AND SLIP CONTROL - Various embodiments of an apparatus, system, and method are disclosed for reducing NO | 11-05-2009 |
20090272105 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST - Various embodiments of an apparatus, system, and method are disclosed for reducing NO | 11-05-2009 |
20100024390 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST - According to one representative embodiment, an apparatus for reducing NO | 02-04-2010 |
20100024393 | APPARATUS, SYSTEM, AND METHOD FOR NOx SIGNAL CORRECTION IN FEEDBACK CONTROLS OF AN SCR SYSTEM - For example, according to one representative embodiment, an apparatus for reducing NO | 02-04-2010 |
20100024397 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS FROM AN ENGINE SYSTEM - Various embodiments of an apparatus, system, and method are disclosed for controlling NO | 02-04-2010 |
20100024787 | APPARATUS, SYSTEM, AND METHOD FOR CONTROLLING EXHAUST EMISSIONS USING A PRE-FILTER - Various embodiments of an apparatus, system, and method are disclosed for improving the tracking bandwidth of an air handling system of an internal combustion engine. For example, one embodiment of an apparatus includes an intake charge module configured to determine a desired air intake flow rate into the combustion chamber based at least partially on a desired oxygen concentration in the combustion chamber. The apparatus also includes an EGR system module configured to determine a desired EGR gas flow rate into the combustion chamber based at least partially on the desired oxygen concentration in the combustion chamber. Additionally, the apparatus includes a pre-filter module configured to modify the desired air intake flow rate and the desired EGR gas flow rate based at least partially on predetermined transient response characteristics of the air handling system. The desired air intake flow rate is achievable by commanding a fresh air regulator to achieve the modified air intake flow rate and the desired EGR gas flow rate is achievable by commanding an EGR regulator to achieve the modified EGR gas flow rate. | 02-04-2010 |
20120137678 | FRESH AIR FLOW ESTIMATION - An apparatus includes an operating conditions module that interprets a number of compressor operating parameters; a compressor flow module that determines a compressor inlet flow in response to the number of compressor operating parameters; and a fresh air flow module that provides a fresh air flow value in response to the compressor inlet flow. The operating conditions module further interprets a current mass air flow value, and the apparatus further includes a mass air flow sensor trimming module that adjusts a mass air flow sensor drift value in response to the current mass air flow value and the fresh air flow value. The apparatus includes a diagnostics module that determines a mass air flow sensor is failed in response to the current mass air flow value and the fresh air flow value. | 06-07-2012 |
20130074496 | SYSTEM FOR CONTROLLING AN AIR HANDLING SYSTEM INCLUDING AN ELECTRIC PUMP-ASSISTED TURBOCHARGER COMPRESSOR - A system and method are provided for controlling an air handling system for an internal combustion engine including a turbocharger having a variable geometry turbine and a compressor having a fresh air inlet fluidly coupled to ambient and to an air outlet of an electric air pump. An air pump enable value as determined a function of target engine speed and total fuel target values and an air flow target is determined as a function of a target fresh air flow value. Operation of the electric air pump is activated to supply supplemental air flow to the fresh air inlet of the compressor if the air pump enable value is greater than a threshold air pump enable value and the air flow target does not exceed a maximum flow value. | 03-28-2013 |
20130080030 | SYSTEM AND METHOD FOR DETERMINING ENGINE CYLINDER PEAK OPERATING PARAMETERS - A peak value of an operating parameter of an internal combustion engine cylinder is determined during each of a series of engine cycles. An engine position signal produced by an engine position sensor is processed to determine engine position relative to a reference engine position. A combustion portion of a current engine cycle is partitioned into a number of side-by-side combustion packets each having a packet duration of a predetermined change in engine position. The engine position is monitored, and for each of the number of side-by-side combustion packets of the combustion portion of the current engine cycle, the operating parameter of the cylinder is estimated. The peak value of the operating parameter of the cylinder during the current engine cycle is determined as a maximum-valued one of the number of estimated operating parameters of the cylinder, and the peak value of the operating parameter is stored in memory. | 03-28-2013 |
20150057909 | SYSTEM AND METHOD FOR ESTIMATING TURBOCHARGER OPERATING SPEED - A system and method are provided for estimating the operating speed of a turbocharger. A first pressure value corresponds to pressure at or near the air inlet of the compressor, and a second pressure value corresponds to pressure at or near the air outlet of the compressor. A temperature value corresponds to a temperature at or near the air inlet of the compressor, and a flow rate value corresponds to a flow rate of air entering the air inlet of the compressor. The operating speed of the turbocharger is estimated as a function of the first pressure value, the second pressure value, the temperature value and the flow rate value. | 02-26-2015 |