Patent application number | Description | Published |
20090084348 | Method Of Accurately Metering A Gaseous Fuel That Is Injected Directly Into A Combustion Chamber Of An Internal Combustion Engine - For gaseous fuels that are injected directly into a combustion chamber the mass flow rate through an injection valve can be influenced by changes in the in-cylinder pressure. A method and apparatus are provided for accurately metering a gaseous into a combustion chamber of an internal combustion engine. The method comprises inputting a fueling command; determining from said fueling command a baseline pulse width of an injection event, based upon a baseline pressure differential across a fuel injection valve; estimating the difference between said baseline pressure differential and an actual pressure differential; calculating a corrected pulse width by applying at least one correction factor to said baseline pulse width, wherein said correction factor is a function of the estimated difference between said baseline pressure differential and said actual pressure differential. | 04-02-2009 |
20100286893 | Method And Apparatus For Determining A Normal Combustion Characteristic For An Internal Combustion Engine From An Accelerometer Signal - The method comprises operating a calibration engine, and collecting combustion characteristic data and reference accelerometer signals, which are correlated with each other and stored in a calibration table. The calibration table can be used by an engine to determine a real-time normal combustion characteristic when the engine is operating by collecting a real-time accelerometer sensor signal and cross correlating with the correlated data stored in the calibration table. Accordingly, the apparatus comprises a calibration engine comprising a calibration sensor, a reference accelerometer sensor and a data storage device for storing the collected calibration data that is correlated with the collected reference accelerometer signals, and an engine equipped with an accelerometer sensor, a calibration table and an electronic engine controller programmed to receive real-time accelerometer signals and cross correlate them with reference accelerometer signals to determine a real-time normal combustion characteristic. | 11-11-2010 |
20110088655 | Fuel Injection Control Method For A Direct Injection Gaseous-Fuelled Internal Combustion Engine - The method comprises receiving from the vehicle controller, values associated with the engine speed and of another parameter indicative of the engine operating conditions, such as the total fuelling amount, and controlling the fuel injection parameters according to the engine state, which, for example, can include a normal operation mode, a filter regeneration mode, an engine protection mode, high or low transient load modes, and operating at different altitudes, through algorithms implemented in an electronic controller. | 04-21-2011 |
20130232958 | SYSTEM AND METHOD TO MANAGE SCR CATALYST NO2/NOX RATIO - Systems and methods are provided for determining and controlling an NO | 09-12-2013 |
Patent application number | Description | Published |
20120204542 | MULTI-LEG EXHAUST AFTERTREATMENT SYSTEM AND METHOD - An exhaust aftertreatment system for treating exhaust flow from an internal combustion engine, and associated method, allows for independent control of exhaust flow through plural exhaust legs of the exhaust aftertreatment system. The independent control of exhaust flow is carried out by adjusting a valve positioned in each the exhaust legs based on a value of a signal generated by a flow measurement device positioned along at least one of the exhaust legs. The valves can be adjusted to force a target flow in a exhaust leg, relative flow among exhaust legs, exhaust temperature in an exhaust leg, exhaust backpressure and/or imbalance within the exhaust legs. | 08-16-2012 |
20140116027 | MULTI-LEG AFTERTREATMENT SYSTEM - An apparatus is disclosed, including an exhaust conditions module structured to interpret a diesel particulate filter (DPF) delta pressure value, a flow balance correlation, a NO | 05-01-2014 |
20150113947 | SYSTEMS AND METHODS FOR THERMAL MANAGEMENT OF AFTERTREATMENT SYSTEM COMPONENTS - An exhaust aftertreatment system includes an oxidation catalyst and a selective catalytic reduction (SCR) catalyst disposed in an exhaust stream of an internal combustion engine. A stay warm thermal management strategy is employed after warm-up of the aftertreatment system is complete to maintain the aftertreatment system above a temperature providing a desired performance threshold of one or more components of the aftertreatment system, such as the oxidation catalyst or the SCR catalyst. | 04-30-2015 |
20150135680 | THERMAL MANAGEMENT FOR REGENERATING AN AFTERTREATMENT DEVICE - A system and method for regeneration of an aftertreatment component are described. The disclosed method can employ any one or combination of operating modes that obtain a target condition of the exhaust gas to support or initiate regeneration of the aftertreatment device. | 05-21-2015 |
20150218992 | TARGETED REGENERATION OF A CATALYST IN AN AFTERTREATMENT SYSTEM - Systems, methods and apparatus are disclosed for targeted regeneration of a catalyst device in an exhaust aftertreatment system of an internal combustion engine. The targeted regeneration can include interpreting, initiating, and/or completing a regeneration event for an SCR catalyst or other type of catalyst in response to a catalyst deactivation condition. A catalyst regeneration event includes at least one of exposing the catalyst to a sufficiently high temperature over a time period that removes contaminants from the catalyst and manipulation of the exhaust gas composition to initiate and/or accelerate removal of contaminants from the catalyst. | 08-06-2015 |