Patent application number | Description | Published |
20110035133 | METHOD FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE - A system and method are disclosed for controlling an internal combustion engine in which actual concentration of combusted gas in the intake is compared with desired concentration of combusted gas in the intake. When a difference is detected, at least one of start of injection timing and quantity of fuel injected is adjusted in accordance with the difference. The actual concentration of combusted gas in the intake is estimated based on engine sensors such as an oxygen sensor coupled to an engine intake. The adjustment of injection timing and/or quantity of fuel is performed, according to some embodiments, during a transition between a low temperature combustion mode and a standard diesel combustion mode. | 02-10-2011 |
20110162626 | Coordination of HP and LP EGR - A method for charging an intake manifold of an engine comprises adjusting an LP EGR flow rate and an uncooled HP EGR flow rate within first limits to maintain a target dilution level in the intake manifold at steady-state. The method further comprises adjusting the LP EGR and uncooled HP EGR rates within second limits, different from the first, to maintain the target dilution level in the intake manifold during transient conditions. | 07-07-2011 |
20110162628 | Compensation For Oxygenated Fuel Use In A Diesel Engine - To partially supplant the use of fossil fuels in diesel engines, oxygen-containing fuels, such as biodiesels, are proposed as blending agents in diesel fuel. Engine calibration coefficients to control EGR rate, timings and quantities of fuel injection pulses, turbocharger boost, etc, can be determined to compensate for the lower energy content of such oxygenate blends compared to diesel fuels. According to an embodiment of the disclosure, the fuel quantity of each of multiple injection pulses is increased proportionally to compensate for the impact of oxygenates. An adjustment in the fuel injection quantity is performed in response to a new tank of fuel and the adjustment is applied for that tank of fuel. A fuel compensation factor (FCF) can be determined based on the actual amount of fuel injected compared to the expected amount of diesel fuel at the present operating condition. | 07-07-2011 |
20110166767 | COMPENSATION FOR OXYGENATED FUELS IN A DIESEL ENGINE - A fuel compensation factor (FCF) is determined to account for the amount of oxygenated fuel blended in diesel fuel. In one embodiment, the FCF is based on an expected exhaust gas oxygen concentration compared to an actual exhaust gas oxygen concentration. The FCF is used to estimate an amount of oxygenated fuel in the blend. Such estimate can be used to adjust the exhaust temperature model, which is used at least in determining the temperature in aftertreatment devices, the fuel dilution model which affects oil change recommendations, and the diesel particulate filter loading model which affects regenerations. Biodiesels are more prone to waxing at lower temperatures. The estimated amount of biodiesel and the temperature in the injection system are used to prevent and/or delay starting when it is predicted that too much wax exists in the fuel system. | 07-07-2011 |
20110168129 | METHOD FOR CONTROLLING LOW TEMPERATURE COMBUSTION - An engine with a high flow capacity brake booster is disclosed. In one example, an actuator is adjusted in response to a flow between the brake booster and an engine intake manifold. Operation of the engine and vehicle brakes may be improved especially when the engine is turbocharged. | 07-14-2011 |
20110270511 | METHOD ENGINE STARTING - An engine starting method is disclosed. In one example, engine operation is adjusted to reduce catalyst light off time. Exhaust temperatures may be increased until a threshold engine temperature is reached. | 11-03-2011 |
20110288751 | METHOD FOR CONTROLLING FUEL INJECTION FOR A DUAL FUEL ENGINE - A fuel injection system including injectors for two different fuels is disclosed. In one example, fuel injection is adjusted to compensate for changes in engine intake air amount. Combustion stability during transient conditions may be improved. | 11-24-2011 |
20120031381 | Coordination of HP and LP EGR - A method for charging an intake manifold of an engine comprises adjusting an LP EGR flow rate and an uncooled HP EGR flow rate within first limits to maintain a target dilution level in the intake manifold at steady-state. The method further comprises adjusting the LP EGR and uncooled HP EGR rates within second limits, different from the first, to maintain the target dilution level in the intake manifold during transient conditions. | 02-09-2012 |
20120085315 | METHOD FOR CONTROLLING LOW TEMPERATURE COMBUSTION - A method for adjusting fuel injection of an engine is disclosed. In one example, fuel injection timing is adjusted to account for fuels having different cetane numbers. Operation of the engine may be improved especially during conditions where combustion phase may vary. | 04-12-2012 |
20120138033 | GLOW PLUG HEATER CONTROL - Methods and systems for operating a glow plug are disclosed. In one example, current supplied to a glow plug can be controlled to promote combustion stability of a cylinder after an engine start. Engine feedgas hydrocarbons may be reduced during conditions where combustion stability may be otherwise reduced in order to reduce tailpipe emissions. | 06-07-2012 |
20120145122 | SYSTEM AND METHOD FOR COMPENSATING CETANE - Methods and systems for adjusting a plurality of fuel injections supplied to a cylinder during a cycle of the cylinder are described. In one example, fuel amounts are moved between fuel injections in response to combustion phase. Engine feedgas hydrocarbons and/or carbonaceous particulate matter may be reduced when cetane of combusted fuel changes. | 06-14-2012 |
20120290190 | System for Determining EGR Cooler Degradation - Systems and methods for diagnosing an EGR system are presented. The method provides for indicating EGR system degradation in response to a temperature at an outlet of an EGR cooler. The method may require less calibration effort than a model based diagnostic. | 11-15-2012 |
20130008418 | METHOD OF ENGINE STARTING - An engine starting method is disclosed. In one example, engine operation is adjusted to reduce catalyst light off time. Exhaust temperatures may be increased until a threshold engine temperature is reached. | 01-10-2013 |
20130087122 | GLOW PLUG HEATER CONTROL - Methods and systems for operating a glow plug are disclosed. In one example, current supplied to a glow plug can be controlled to promote combustion stability of a cylinder after an engine start. Engine feedgas hydrocarbons may be reduced during conditions where combustion stability may be otherwise reduced in order to reduce tailpipe emissions. | 04-11-2013 |
20130087129 | GLOW PLUG HEATER CONTROL - Methods and systems for operating a glow plug are disclosed. In one example, current supplied to a glow plug can be controlled to promote combustion stability of a cylinder after an engine start. Engine feedgas hydrocarbons may be reduced during conditions where combustion stability may be otherwise reduced to reduce tailpipe emissions. | 04-11-2013 |
20130261930 | SYSTEM AND METHOD FOR INCREASING FUEL ECONOMY OF A VEHICLE INCLUDING A SCR CATALYST - Methods and systems for increasing fuel economy of a vehicle including a SCR catalyst are presented. In one example, an amount of EGR provided to an engine is decreased in response to performance of the SCR being within a predetermined range of performance. The methods and systems may increase vehicle fuel economy while vehicle tailpipe emissions are achieved. | 10-03-2013 |
20140026539 | METHOD FOR REGENERATING AN EXHAUST AFTER TREATMENT DEVICE - Methods and systems for regenerating an after treatment device are disclosed. In one example, the possibility of introducing fuel to oil during after treatment device regeneration is reduced. The methods and systems may reduce engine degradation and improve engine emissions. | 01-30-2014 |
20140180561 | METHOD FOR CONTROLLING FUEL INJECTION FOR A DUAL FUEL ENGINE - A fuel injection system including injectors for two different fuels is disclosed. In one example, fuel injection is adjusted to compensate for changes in engine intake air amount. Combustion stability during transient conditions may be improved. | 06-26-2014 |
20150083075 | SYSTEM AND METHOD FOR COMPENSATING CETANE - Methods and systems for adjusting a plurality of fuel injections supplied to a cylinder during a cycle of the cylinder are described. In one example, fuel amounts are moved between fuel injections in response to combustion phase. Engine feedgas hydrocarbons and/or carbonaceous particulate matter may be reduced when cetane of combusted fuel changes. | 03-26-2015 |
Patent application number | Description | Published |
20090101122 | Multi-Cooler EGR Cooling - A system is described for coordination of Exhaust Gas Recirculation (EGR) flow through and around a plurality of EGR coolers differently depending on operating conditions. | 04-23-2009 |
20100058740 | Managing Reductant Slip in an Internal Combustion Engine - A method for controlling operation of vehicle system including an internal combustion engine and a catalytic emission control device coupled in an exhaust of the engine, the method including delivering, which may include injecting into the exhaust, reductant to the emission control device responsive to vehicle operating conditions, and increasing emission control device inlet-NOx in response to reductant release from the emission control device. | 03-11-2010 |
20110023819 | GLOW PLUG PLACEMENT IN A DIESEL ENGINE - A four-valve per cylinder engine has two intake valves, two exhaust valves and a centrally located fuel injector. Between each adjacent pair of valves is a valve bridge with a point of minimum separation between adjacent valves. In the present disclosure, the glow plug port is defined in the cylinder top at a location outboard of the minimum separation between adjacent and at a depth which is tangent to an edge of a fuel jet emanating the injector. By placing the glow plug farther outboard than found in the prior art, the glow plug contacts the fuel as it comes out of the injector and as it rebounds off a feature of the piston bowl. | 02-03-2011 |
20110023842 | COOLER BYPASS TO REDUCE CONDENSATE IN A LOW-PRESSURE EGR SYSTEM - Various systems and methods are described for an exhaust gas recirculation (EGR) system including an EGR cooler coupled to a turbocharged engine in a vehicle. One example method comprises, under selected operating conditions, controlling a mixture temperature of cooled and uncooled EGR at a mixing location upstream of an intake passage inlet by routing at least a portion of exhaust gas through a bypass around the EGR cooler. | 02-03-2011 |
20110131957 | Methods and Systems for Emission System Control - Methods and systems are provided for operating a turbocharged engine including a particulate filter positioned upstream of a turbocharger turbine, a catalyst positioned downstream of the turbine, and an EGR passage coupled between an engine exhaust and engine intake. In one example, the method comprises, diverting exhaust gas from downstream of the filter to the engine intake via the EGR passage, and adjusting an amount of diverted exhaust gas based on filter operating conditions. | 06-09-2011 |
20110146267 | Methods and Systems for Emission System Control - Methods and systems are provided for operating an engine including an emission control system, the emission control system comprising a catalyst downstream of a turbine of a boosting device and a reductant injector upstream of the turbine. In one example, the method comprises injecting reductant into exhaust upstream of the turbine, mixing the injected reductant with exhaust gas via the turbine, and delivering the mixed reductant to the catalyst. | 06-23-2011 |
20110146268 | Methods and Systems for Emission System Control - Methods and systems are provided for controlling an engine in a vehicle, the engine having a turbocharger, and a particulate filter upstream of a turbocharger turbine. In one example, the method comprises, under selected boosted operating conditions, injecting a reductant upstream of the filter during an exhaust stroke to generate an exothermic reaction at the filter. | 06-23-2011 |
20110146269 | Methods and Systems for Emission System Control - Methods and systems are provided for operating an engine including an SCR catalyst downstream of an exhaust turbine and a particulate filter upstream of the turbine. In one example, the method comprises, adjusting a turbine wastegate to adjust a catalyst temperature to a desired catalyst temperature. | 06-23-2011 |
20120117963 | Methods and Systems for Emission System Control - Methods and systems are provided for operating a turbocharged engine including a particulate filter positioned upstream of a turbocharger turbine, a catalyst positioned downstream of the turbine, and an EGR passage coupled between an engine exhaust and engine intake. In one example, the method comprises, diverting exhaust gas from downstream of the filter to the engine intake via the EGR passage, and adjusting an amount of diverted exhaust gas based on filter operating conditions. | 05-17-2012 |
20130118162 | Methods and Systems for Emission System Control - Methods and systems are provided for operating an engine including an emission control system, the emission control system comprising a catalyst downstream of a turbine of a boosting device and a reductant injector upstream of the turbine. In one example, the method comprises injecting reductant into exhaust upstream of the turbine, mixing the injected reductant with exhaust gas via the turbine, and delivering the mixed reductant to the catalyst. | 05-16-2013 |
20140000242 | METHODS AND SYSTEMS FOR EMISSION SYSTEM CONTROL | 01-02-2014 |
20140222314 | SYSTEM AND METHOD FOR COMPENSATING BIODIESEL FUEL - Methods and systems for adjusting a plurality of fuel injections supplied to a cylinder during a cycle of the cylinder are described. In one example, fuel amounts are adjusted in response to a biodiesel concentration in fuel supplied to an engine. | 08-07-2014 |
20140360163 | SYSTEM AND METHOD FOR CONTROLLING AN ENGINE THAT INCLUDES LOW PRESSURE EGR - Methods and systems for operating an engine that includes a low pressure EGR passage and a selective reduction catalyst are disclosed. In one example, an actuator is adjusted in response to a NOx mass flow rate in the low pressure EGR passage. | 12-11-2014 |