| Patent application number | Description | Published |
|---|
| 20100083639 | Apparatus and Method for Optimizing Exhaust Temperature Control in a Vehicle During Particulate Filter Regneration - A method controls an exhaust gas temperature from a vehicle engine during regeneration of particulate filter (PF) in a vehicle having an oxidation catalyst (OC) and a selective catalytic reduction catalyst (SCR). The method ensures that a final OC temperature does not exceed a maximum of the target OC outlet temperature and a calibrated maximum OC outlet temperature. An apparatus for controlling a temperature of the exhaust gas includes sensors for measuring a temperature within the exhaust system and a controller having an algorithm, an OC temperature lookup table, and a PF temperature lookup table. The algorithm calculates a target OC outlet temperature using the lookup tables and a delayed error value that compensates for a thermal mass of the SCR. Actual OC outlet temperature is limited during regeneration of the PF to the lesser of the target OC outlet temperature and a calibrated maximum OC outlet temperature. | 04-08-2010 |
| 20100223910 | ENVIRONMENTAL FACTOR BASED PARTICULATE FILTER REGENERATION - A control module for a vehicle includes a correction module that generates a correction signal based on a regeneration state of an exhaust system of the vehicle and based on a received environmental signal. The environmental signal includes at least one of an altitude value, an ambient temperature, and an air flow value. The air flow value corresponds to air flow across an external area of the exhaust system. A first post injection module generates a first post injection signal. A second post injection module adjusts the first post injection signal based on the correction signal to generate a second post injection signal. | 09-09-2010 |
| 20100223912 | PARTICULATE FILTER TEMPERATURE CORRECTION SYSTEM AND METHOD - A method and system of controlling an engine includes a control system includes an exhaust gas flow rate module generating an exhaust gas flow rate signal corresponding to a flow rate of exhaust gases. The control system further includes a temperature adjustment module that determines a temperature correction factor based on the exhaust gas flow rate and that determines a corrected temperature particulate sensor signal in response to a measured particulate temperature signal and the temperature correction factor. | 09-09-2010 |
| 20100269489 | OXIDATION CATALYST OUTLET TEMPERATURE CORRECTION SYSTEMS AND METHODS - A temperature control system comprises a temperature determination module, a temperature correction module, a temperature control module, and an updating module. The temperature determination module determines a desired outlet temperature for an oxidation catalyst (OC) that is located upstream of a particulate filter (PF) in an exhaust system. The temperature correction module determines a temperature correction from a plurality of temperature corrections. The temperature control module controls an outlet temperature of the OC based on the desired outlet temperature and the temperature correction. The updating module selectively updates at least one of the plurality of temperature corrections when an engine speed and an engine load are within respective predetermined ranges. | 10-28-2010 |
| 20100300074 | EXHAUST HYDROCARBON INJECTION CONTROL SYSTEM AND METHOD - A system comprises an injection control module and a fuel film module. The injection control module controls a flow rate of fuel injected into an exhaust system to adjust a temperature of exhaust gas. The fuel film module determines an accumulation rate of fuel on a surface of the exhaust system based on the flow rate of the fuel. The fuel film module determines a release rate of fuel from the surface of the exhaust system based on a flow rate of the exhaust gas. The injection control module adjusts the flow rate of the fuel based on the accumulation rate and the release rate. | 12-02-2010 |
| 20110107741 | EXHAUST GAS OXYGEN CONCENTRATION CONTROL SYSTEM AND METHOD - An engine control system comprises an oxygen comparison module and a regeneration control module. The oxygen comparison module compares an oxygen concentration of an exhaust gas of an engine to an oxygen threshold. A regeneration control module initiates regeneration of a particulate filter and controls regeneration based on the oxygen comparison and at least one of a particulate filter load, a particulate filter temperature, and a speed of the engine. | 05-12-2011 |
| 20110167803 | SYSTEM AND METHOD FOR CONTROLLING EXHAUST GAS TEMPERATURE DURING PARTICULATE MATTER FILTER REGENERATION - An engine control system includes an injection determination module, a correction factor determination module, and a regeneration control module. The injection determination module determines a desired amount of hydrocarbons (HC) to inject into exhaust gas produced by an engine based a flow rate of the exhaust gas. The correction factor determination module determines a correction factor for the desired amount of HC based on engine speed and engine load. The regeneration control module controls injection of an adjusted amount of HC into the exhaust gas during regeneration of a particulate matter filter, wherein the adjusted amount of HC is based on the desired amount of HC and the correction factor. | 07-14-2011 |
| 20110225969 | COMPRESSOR BYPASS TO EXHAUST FOR PARTICULATE TRAP REGENERATION - An exhaust gas treatment system for an internal combustion engine having an intake air compressor includes an exhaust gas conduit in fluid communication with, and configured to receive exhaust gas from the engine. A particulate filter assembly is in fluid communication with the exhaust gas conduit and periodically receives heated exhaust gas for combustion of carbon and particulates trapped therein. An air conduit extends between and fluidly couples the intake air compressor to the exhaust gas conduit and is configured to inject air from the compressor into the exhaust gas conduit when the particulate filter is receiving heated exhaust gas to assist the combustion of the carbon and particulates. | 09-22-2011 |
