Patent application number | Description | Published |
20110056265 | IDENTIFICATION OF AIR AND/OR FUEL METERING DRIFT - The disclosure relates to a system and method for identifying whether a difference between measured lambda and computed lambda, based on mass air flow and mass fuel flow, is due to a drift in fuel metering or a drift in air metering. The determination is based on also measuring exhaust gas NOx using a NOx sensor. By comparing the measured NOx to modeled NOx, drift can be attributed appropriately to the air flow measurement and/or the fuel flow measurement. Appropriate correction in the calibration can be undertaken to overcome sensor drift and/or drift in the fuel injector/fuel system flow characteristics. | 03-10-2011 |
20110094471 | EFFECTS OF BIODIESEL FUEL ON FUEL DILUTION OF ENGINE OIL - A method and an engine are disclosed for determining an amount of fuel in the engine oil. Such information can be used to recommend an oil change and to estimate a fraction of biodiesel in the fuel supplied to the engine. According to one embodiment, actual oil volume in the oil pan is based on a signal from a level sensor in the oil and a theoretical oil volume is determined based on initial oil volume and fuel entering the oil in the oil pan, fuel leaving the oil pan due to evaporation, and oil being consumed in the combustion chamber. Based on the difference between the actual and theoretical oil volumes, a proportion of biodiesel can be determined and transmitted to an engine control system. | 04-28-2011 |
20110100341 | METHOD AND ARRANGEMENT FOR EXHAUST-GAS RECIRCULATION IN AN INTERNAL COMBUSTION ENGINE - A system and method are disclosed for providing exhaust-gas recirculation in an internal combustion engine that has an exhaust-gas turbocharger. The exhaust gas to be recirculated is collected from the exhaust line downstream of a turbine of the turbocharger, passed through a condensate separator, and supplied into the intake line upstream of the compressor. The condensate is filtered, collected in a reservoir, and pumped to an injection device coupled to the engine intake at a location downstream of the compressor. | 05-05-2011 |
20120060475 | METHOD FOR ADAPTING AN EXOTHERMIC REACTION IN THE EXHAUST SYSTEM OF A MOTOR VEHICLE - A method for adapting a thermal model of a catalyst is provided. The method comprises adjusting an amount of exhaust gas reductant upstream of the catalyst based on a thermal model of the catalyst, the thermal model including heat input from exothermic catalyst reactions, an amount of the exothermic heat input adjusted responsive to an estimated temperature from the thermal model and a measured temperature downstream of the catalyst. In this way, a thermal model for catalyst activity and catalyst operating parameters may be adjusted to ensure optimal catalyst function. | 03-15-2012 |
20130013177 | EFFECTS OF BIODIESEL FUEL ON FUEL DILUTION OF ENGINE OIL - An engine and related control system determine an amount of fuel diluting the engine oil in the oil pan. Such information can be used to recommend an oil change and to estimate a fraction of biodiesel in the fuel supplied to the engine. According to one embodiment, actual oil volume in the oil pan is based on a signal from a level sensor in the oil and a theoretical oil volume is determined based on initial oil volume and fuel entering the oil in the oil pan, fuel leaving the oil pan due to evaporation, and oil being consumed in the combustion chamber. Based on the difference between the actual and theoretical oil volumes, a proportion of heavy fuel components or biodiesel can be determined and transmitted to an engine control system. | 01-10-2013 |
20130101471 | EXHAUST-GAS AFTERTREATMENT SYSTEM - The present disclosure relates to an exhaust-gas aftertreatment system for an internal combustion engine, having an exhaust line and having provided therein a filter arrangement which comprises a first particle filter element and a second particle filter element, wherein the first particle filter element is equipped with an active regeneration device for restoring its filtration performance. The disclosure furthermore relates to a method for operating an exhaust-gas aftertreatment system of said type and to the use thereof. | 04-25-2013 |
20130101485 | METHOD FOR CONTROLLING AN INJECTION DEVICE FOR FEEDING AN AMMONIA-RELEASING REDUCING AGENT INTO AN EXHAUST-GAS PURIFICATION SYSTEM OF AN INTERNAL COMBUSTION ENGINE - The present disclosure relates to a method for controlling an injection device for feeding an ammonia-releasing reducing agent into an exhaust-gas purification system of an internal combustion engine for the purpose of reducing the nitrogen oxide emissions, wherein the exhaust-gas purification system comprises at least one SCR catalytic converter with n cells which are arranged in series in the exhaust-gas throughflow direction and in which ammonia can be stored. | 04-25-2013 |
20130174536 | METHOD FOR PROTECTING A DPF OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for protecting a DPF in the exhaust section of an internal combustion engine of a motor vehicle from unintentional combustion of soot in the DPF. According to the invention, the motor vehicle is a hybrid vehicle having at least one electric machine and is able to be driven exclusively by one or more electric machine(s) for some time. The vehicle is operated in a DPF protection mode if the system detects that unintentional combustion of soot is taking place or threatening to take place in the DPF, initiating an automatic decoupling of the combustion engine from the wheel drive train, forward propulsion demands by the driver are met exclusively with the aid of the one or more electric machine(s), and the combustion engine is switched off completely or is operated with stable stoichiometric combustion. | 07-11-2013 |
20130206100 | DILUTION OF THE GAS IN AN INTAKE MANIFOLD BY WATER INJECTION - Systems and methods for reducing NO | 08-15-2013 |
20130213009 | METHOD FOR INITIATING AND MAINTAINING A SUBSTOICHIOMETRIC OPERATING MODE OF AN INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE FOR CARRYING OUT A METHOD OF THIS KIND - The present disclosure describes systems and methods for recharging a storage catalyst of an internal combustion engine. A method is described, comprising: while operating an engine in a substoichiometric operating mode when the engine is under medium load and responsive to an LNT condition, assisting the engine with an electric machine connected to an engine crankshaft. The electric machine provides an auxiliary drive to assist the engine in maintaining the substantially steady state substoichiometric operating mode which may be used to reduce NO | 08-22-2013 |
20130239800 | OPERATING METHOD FOR A PARTICLE FILTER - The systems and methods herein relate the operation of a particle filter which is arranged in an exhaust-gas path of an internal combustion engine, to a device for exhaust-gas aftertreatment which can be operated in accordance with the method that comprises determining a mass flow rate of an exhaust-gas flow flowing in the exhaust-gas path; and supplying ambient air into the exhaust-gas path as a function of the determined mass flow rate. By this method, the spontaneous regeneration of a particle filter within the exhaust system may be abated. | 09-19-2013 |
20130336862 | VARIABLE EXHAUST GAS AFTERTREATMENT SYSTEM - Systems and method for adjusting a cone angle of injected reductant directed into an engine exhaust upstream of a catalytic device based on the temperature distribution within the catalytic device are disclosed. In one particular example, a dosing unit comprising an adjustable piston is described whose adjustment further controls the distribution and amount of reaction fluid delivered therefrom. In this way, the fluid flow shape may be controlled to achieve a more optimal exhaust gas conversion based on the prevailing conditions within the exhaust gas system. | 12-19-2013 |
20140013726 | AMMONIA STORAGE CONTROL - Various methods for controlling ammonia levels stored in a catalyst by controlling exhaust gas temperatures are provided. In one embodiment, a temperature of a catalyst in an internal combustion engine is determined. If the temperature of the catalyst exceeds a first threshold at which an ammonia capacity of the catalyst for the temperature is below a current stored ammonia level in the catalyst, a load of the engine is reduced including adjusting a torque output of a motor operatively coupled to the engine. | 01-16-2014 |
20140013727 | METHOD FOR ENRICHING THE EXHAUST GAS OF AN INTERNAL COMBUSTION ENGINE WITH REDUCING AGENT AND INTERNAL COMBUSTION ENGINE FOR PERFORMING SUCH A METHOD - A method for enriching the exhaust gas of an internal combustion engine with a reducing agent is provided, the internal combustion engine including at least one cylinder and having an intake system for admission of charge air, an exhaust gas discharge system for discharging exhaust gases, and at least one exhaust gas aftertreatment system for reducing nitrogen oxides arranged in the exhaust gas discharge system and which is periodically provided with a supply of reducing agent. The method comprises enriching the exhaust gas with the reducing agent in the exhaust gas discharge system upstream of at least the one exhaust gas aftertreatment system when a fuel supply of the at least one cylinder of the internal combustion engine is deactivated due to an absence of load demand. | 01-16-2014 |
20140014062 | METHOD AND DEVICE FOR CONTROLLING A FOUR-STROKE INTERNAL COMBUSTION ENGINE - A system is disclosed for a four-stroke internal combustion engine comprising: at least two cylinders; a fuel direct injection device; a variable valve timing system; an engine controller to control valve timing according to load; wherein, below a lower load threshold, a first cylinder is deactivated, an injection of fuel takes place into a combustion chamber of the first cylinder and an inlet valve of the first cylinder is open during a compression stroke. The opening of the inlet valve during a compression stroke of the first cylinder when deactivated allows the substantially homogenous air-fuel mixture therein to escape into the intake manifold and be made available to the second and active cylinder. | 01-16-2014 |
20140014066 | METHOD AND DEVICE FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE - A system is disclosed herein for a four-stroke internal combustion engine, the system comprising: at least two cylinders; a fuel direct injection device; a variable valve timing system; an engine controller to control spark ignition and valve timing according to load; wherein, below a lower load threshold, a first cylinder is deactivated, an injection of fuel takes place into a combustion chamber of the first cylinder and an outlet valve of the first cylinder is open during a compression stroke. Fuel injected into the deactivated cylinders may enter the exhaust tract through the open outlet valves and serve as a reducing agent therein. | 01-16-2014 |
20140014079 | INDIRECT MEASUREMENT OF RELATIVE AIR HUMIDITY - The disclosure relates to a method for the measurement of relative air humidity in a fresh air induction tube of an internal combustion engine. Here a concentration of oxygen in the fresh air induction tube is measured by an oxygen sensor and a temperature in the fresh air induction tube is determined. The relative air humidity is determined depending on the measured concentration of oxygen and the determined temperature. | 01-16-2014 |
20140019028 | DIFFERENTIAL FUEL INJECTION - A system and methods for operating four in-line cylinders with common rail injection is described that comprises operating a first cylinder group without a compression and power stroke injection, but with an exhaust stroke injection while operating a second cylinder group with at least a compression stroke injection. In this way, the unburned fuel injected during the exhaust stroke enriches the exhaust-gas flow and further allows heating of the exhaust aftertreatment system. In one example provided, the first cylinder group is further configured to operate in an exhaust heating mode while also operating in a power generating mode. | 01-16-2014 |
20140047817 | DUCTING SYSTEM FOR FEEDING AIR AND EXHAUST GASES TO AN INTERNAL COMBUSTION ENGINE AND FOR DISCHARGING THE EXHAUST GASES PRODUCED BY THE INTERNAL COMBUSTION ENGINE FROM THE INTERNAL COMBUSTION ENGINE - In one embodiment, a ducting system comprises a feed duct for feeding air and exhaust gases to an internal combustion engine, a discharge duct for discharging the exhaust gases produced by the internal combustion engine from the internal combustion engine, in which one or more exhaust gas aftertreatment units are arranged for aftertreatment of the exhaust gases, and a heating device arranged in the feed duct. The heating device is configured to perform a heating process for preheating the air that is fed to the internal combustion engine. A duration of the heating process and/or heat output given off by the heating device is controlled as a function of a variable approximately representing a state of ageing of at least one of the one or more exhaust gas treatment units. | 02-20-2014 |
20140050642 | METHOD AND DEVICE FOR MONITORING A REDUCING AGENT SOLUTION COMPOSITION IN THE EXHAUST GAS SYSTEM OF AN INTERNAL COMBUSTION ENGINE - A method for monitoring a reducing agent solution composition in an exhaust gas system of an internal combustion engine with metered injection of the reducing agent solution upstream of an SCR catalytic converter comprises metering injection of the reducing agent solution into the exhaust gas stream, determining a measured variable of a change in water content in the exhaust gas stream in response to the injected reducing agent solution, and determining at least one indicator value of a composition of the reducing agent solution at least based on the determined measured variable. In this way, deviations from the standard composition may be taken into account during metering or be displayed as an error. | 02-20-2014 |
20140102079 | REGENERATION METHOD AND MOTOR VEHICLE - A regeneration method ( | 04-17-2014 |
20140157762 | METHOD FOR CONTROLLING AN EXHAUST-GAS AFTERTREATMENT DEVICE OF A HYBRID DRIVE, AND HYBRID DRIVE - A method for controlling an exhaust gas aftertreatment device of a vehicle hybrid drive is provided. The method comprises operating the hybrid drive only by a combustion engine, only by a non-combustion motor, or by both, as a function of a temperature of the exhaust aftertreatment device, and conducting exhaust gas of the hybrid drive at least partially through the exhaust aftertreatment device, the engine and motor each providing output to power the vehicle. In this way, the aftertreatment device may be operated at an optimal temperature for conversion performance. | 06-12-2014 |
20140220691 | DETERMINATION OF A DEGREE OF AGING OF AN OXIDIZING CATALYTIC CONVERTER - A method for determining a degree of aging of an oxidizing catalytic converter in an exhaust system of an internal combustion engine is provided. The method comprises generating a temporary increase in carbon monoxide levels in an exhaust gas stream, monitoring subsequent oxidizing action and determining a degree of aging of the oxidizing catalytic converter as a function of the measured oxidizing action. The method further comprises measuring a temperature rise during oxidation and correlating the aging of the converter to the speed of temperature rise. | 08-07-2014 |
20140230410 | INTERNAL COMBUSTION ENGINE WITH EXHAUST-GAS AFTERTREATMENT ARRANGEMENT AND INTAKE AIR ARRANGEMENT AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE OF SAID TYPE - A system and method for controlling temperature of a urea reductant to form ammonia for NOx reduction in a selective catalytic reducer coupled to a turbocharged engine exhaust by portioning a flow across the reductant of one or more of the following: a combination of compressed air and ambient air; and/or a combination of the exhaust upstream and downstream the turbine. | 08-21-2014 |
20140230433 | INTERNAL COMBUSTION ENGINE WITH EXHAUST-GAS AFTERTREATMENT ARRANGEMENT AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE OF SAID TYPE - A system and method for controlling temperature of a urea reductant to form ammonia for NOx reduction in a selective catalytic reducer coupled to a turbocharged engine exhaust by portioning a flow across the reductant between compressed air and ambient air. | 08-21-2014 |
20140366506 | SYSTEM AND METHOD FOR A MOVABLE EXHAUST AFTERTREATMENT DEVICE IN AN INTERNAL COMBUSTION ENGINE - The present application relates to an exhaust-gas aftertreatment device and to a method for exhaust-gas aftertreatment. According to one aspect of the present application, the exhaust-gas aftertreatment device has, in the exhaust manifold of the internal combustion engine, a filter passage with, for the exhaust-gas stream, a through-path that is variably adjustable over time during the operation of the exhaust-gas aftertreatment device. | 12-18-2014 |