| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123703000 | Exhaust gas composition sensor | 47 |
| 20080210209 | Lambda Controller with Balancing of the Quantity of Oxygen - In a method for the lambda control in an internal combustion engine with at least one catalytic converter, with the exhaust system being provided with front and rear lambda control circuits lambda with at least one rear oxygen sensor downstream in reference to the catalytic converter, with an output signal of the rear oxygen sensor being processed by the rear lambda control circuit, a difference value being formed to a rear target lambda value, and an actuating variable being formed acting on the target lambda value of the front lambda control circuit it is provided that after a change of the algebraic sign of the difference value a balanced oxygen amount is determined for a time interval since the sign change from the oxygen amount entered into and removed from the catalytic converter and the actuating variable of the rear lambda control circuit being selected depending on the balanced oxygen amount. | 09-04-2008 |
| 20080276920 | Exhaust emission control device of an internal combustion engine - As forcible modulation parameters, a cycle and an amplitude are set so that O | 11-13-2008 |
| 20090056686 | AIR-FUEL RATIO CONTROL APPARATUS AND METHOD FOR AN INTERNAL COMBUSTION ENGINE - A target cylinder is selected while an internal combustion engine is operating in a steady state. The fuel injection quantity of the target cylinder is gradually increased or decreased and the fuel injection quantity of another cylinder is decreased or increased a corresponding amount in an inverse manner such that the overall air-fuel ratio of the internal combustion engine does not change. During this time, the hydrogen content in exhaust gas is detected and the injection ratio when the hydrogen content is lowest is stored as an optimal injection ratio for each cylinder. Thereafter, fuel is injected into each cylinder at the optimal injection ratio for each cylinder. | 03-05-2009 |
| 20090090339 | Dual Mode Oxygen Sensor - A method for sensing an air-fuel ratio of exhaust gasses from an engine of a vehicle using a sensor, the sensor having a pumping cell and a reference cell, the method comprising pumping a current in the pumping cell during at least a first set of operating conditions; reducing said pumping during at least a second set of operating conditions; providing a signal from the sensor during at least the first and second sets of operating conditions; and adjusting at least one of a fuel injection amount and an air amount into the engine to maintain a desired air-fuel ratio based on the signal during at least the first and second sets of operating conditions. | 04-09-2009 |
| 20090314268 | AIR-FUEL RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - The present invention relates to an air-fuel ratio control device for an internal combustion engine, and makes it possible to maintain high purification performance by suppressing a decrease in the oxygen occlusion capability of a catalyst. When an O | 12-24-2009 |
| 20100059029 | CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - An internal combustion engine, including an air/fuel ratio sensor in an exhaust passage detecting an air/fuel ratio in a heated state, implements a technique improving emission at a starting time, by eliminating splash of water droplets early in the exhaust passage at the starting time to advance the heating starting timing of the air/fuel ratio sensor. At the starting time, opening/closing timing of a valve is advanced from a reference opening/closing timing or the reference of the opening/closing timing of the exhaust valve after the warming-up was ended, which continues until the wall temperature of the exhaust passage near the air/fuel ratio sensor becomes equal to or higher than a water droplet disappearing temperature, at which water droplets disappear. Then, change of the opening/closing timing of the exhaust valve responding to the running state by a variable valve mechanism is started. | 03-11-2010 |
| 20100132681 | AIR-FUEL RATIO CONTROL APPARATUS AND AIR-FUEL RATIO CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - In an air-fuel ratio control apparatus for an internal combustion engine, a feedforward correction amount obtained in accordance with a deviation of a target air-fuel ratio from a stoichiometric air-fuel ratio and a feedback correction amount calculated on the basis of an output value of an air-fuel ratio sensor and subjected to a guard processing are added to a base fuel injection amount corresponding to the stoichiometric air-fuel ratio to decide a fuel injection amount. An upper limit ( | 06-03-2010 |
| 20100175674 | METHOD FOR CONTROLLING THE EGR AND THE THROTTLE VALVES IN AN INTERNAL COMBUSTION ENGINE - A method and system are provided for controlling a throttle valve and an EGR valve in internal combustion engine. The method includes, but is not limited to the steps of measuring an actual fresh mass air flow value entering the engine, determining an exhaust oxygen concentration set point ([O | 07-15-2010 |
| 20100242935 | CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - Provided is a control apparatus for an internal combustion engine which is capable of estimating a single composition concentration based on an air-fuel ratio correction amount obtained by using an output of an air-fuel ratio sensor in exhaust gas and optimizing a fuel injection amount by using a concentration estimation value. When fueling is performed again during alcohol concentration change after the fueling, an alcohol concentration estimation period or a start determination period for the alcohol concentration change is extended by an integrated fuel injection amount from initial fueling until refueling, whereby alcohol concentration estimation accuracy is improved with respect to the alcohol concentration change due to the initial fueling and the refueling. | 09-30-2010 |
| 20100300418 | AIR-FUEL RATIO SENSOR AND CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - There is provided an air-fuel ratio sensor with which an improvement in the accuracy in detecting the air-fuel ratio of detection target gas and an improvement in the response characteristics can both be achieved. The sensor includes a sensor element that outputs an output signal indicative of the air-fuel ratio of a detection target gas, a pair of electrodes including a detection target gas side electrode to which the detection target gas is introduced and an atmosphere side electrode exposed to the atmosphere, which are arranged in such a way as to sandwich the sensor element, a diffusion-controlling layer that is disposed on the sensor element in such a way as to cover the detection target gas side electrode and introduces the detection target gas from an entrance portion through which the detection target gas flows in to the detection target gas side electrode, and a catalyst layer provided on a part of the entrance portion. | 12-02-2010 |
| 20100326413 | SYSTEM AND METHOD FOR PROTECTING ENGINE FUEL PUMPS - A fuel control system for an internal combustion engine includes a fuel starvation detection module and a fuel pump protection module. The fuel starvation detection module detects when a fuel pump is delivering less than a predetermined amount of fuel based on a fuel level in a fuel tank, a fuel pressure in the fuel pump, and an air/fuel (A/F) ratio of the engine. The fuel pump protection module decreases an amount of fuel supplied to the engine during a period after detecting that the fuel pump is delivering less than the predetermined amount of fuel. | 12-30-2010 |
| 20110023855 | METHOD, SYSTEMS AND SENSOR FOR DETECTING HUMIDITY - Methods systems and device for detecting humidity in air through use of an ammonia sensor included in the exhaust of an engine, such as a diesel engine are provided. In one example, a method for an engine having an exhaust with an ammonia sensor includes adjusting an operating parameter in response to ambient humidity, the ambient humidity based on a first ammonia sensor reading at a first exhaust air-fuel-ratio and a second ammonia sensor reading at a second exhaust air-fuel-ratio. | 02-03-2011 |
| 20110030664 | METHOD AND DEVICE FOR DETERMINING THE COMPOSITION OF A FUEL MIXTURE - The invention relates to a method and device for determining the composition of a fuel mixture made of one first fuel and at least one second fuel for operating an internal combustion engine, wherein said internal combustion engine has a fuel metering apparatus and at least one exhaust gas probe in an exhaust gas channel. According to the method of the invention, it is provided that the fuel mixture is at least temporarily supplied to the exhaust gas probe at least partially uncombusted, and the composition of the fuel mixture is determined from an output signal of the exhaust gas probe. According to the device of the invention, it is provided that the exhaust gas probe is situated proximal to the motor in the direction of the exhaust gas flow before a first catalytic converter, and the fuel mixture can be supplied at least partially uncombusted to the exhaust gas probe at least temporarily. The method allows the precise and reliable determination of the composition of a fuel mixture in internal combustion engines operated in flex fuel operation existing components. | 02-10-2011 |
| 20110073086 | METHOD TO ADAPT THE O2 SIGNAL OF AN O2 SENSOR DURING OVERRUN - A system for compensating for changes in behavior of an oxygen sensor. In one embodiment, the system includes an oxygen sensor configured to produce an output indicative of an oxygen level in an exhaust stream produced by an internal combustion engine. An electronic control unit receives the output of the oxygen sensor and is configured to cause the internal combustion engine to operate in an overrun mode. The electronic control unit is programmed or otherwise configured to determine whether a change in oxygen level over time is approximately zero. When the change in oxygen level is approximately zero or near zero, the electronic control unit determines a compensation factor for the oxygen sensor. | 03-31-2011 |
| 20110073087 | DELAY COMPENSATION SYSTEMS AND METHODS - A steady-state (SS) delay module determines a SS delay period for SS operating conditions based on an air per cylinder. A dynamic compensation module determines a predicted delay period based on first and second dynamic compensation variables for dynamic operating conditions, the SS delay period, a previous predicted delay period. The first dynamic compensation variable corresponds to a period between a first time when fuel is provided for a cylinder of an engine and a second time when exhaust gas resulting from combustion of the fuel and air is expelled from the cylinder. The SS and predicted delay periods correspond to a period between the first time and a third time when the exhaust gas reaches an exhaust gas oxygen sensor located upstream of a catalyst. A final equivalence ratio module adjusts fuel provided to the cylinder after the third time based on the predicted delay period. | 03-31-2011 |
| 20110073088 | METHOD FOR CONTROLLING FUEL OF A SPARK IGNITED ENGINE WHILE REGENERATING A PARTICULATE FILTER - A system for filtering and oxidizing particulate matter produced by a gasoline direct injection engine is disclosed. In one embodiment, engine cylinder air-fuel is adjusted to allow soot to oxidize at an upstream particulate filter while exhaust gases are efficiently processed in a downstream catalyst. | 03-31-2011 |
| 20110073089 | FUEL CONTROL SYSTEM AND METHOD FOR MORE ACCURATE RESPONSE TO FEEDBACK FROM AN EXHAUST SYSTEM WITH AN AIR/FUEL EQUIVALENCE RATIO OFFSET - An engine control system includes a saturation determination module, an adjustment factor generation module, and a fuel control module. The saturation determination module determines when a first exhaust gas oxygen (EGO) sensor is saturated, wherein the first EGO sensor is located upstream from a catalyst. The adjustment factor generation module generates an adjustment factor for an integral gain of a fuel control module when the first EGO sensor is saturated. The fuel control module adjusts a fuel command for an engine based on differences between expected and measured amounts of oxygen in exhaust gas produced by the engine, a proportional gain, the integral gain, and the integral gain adjustment factor. | 03-31-2011 |
| 20110100344 | VEHICLE AND VEHICLE CONTROL METHOD - An engine ECU calculates a rotational variation based on a required rotation time when a complete misfire occurs in a cylinder, a required rotation time when complete combustion occurs in the cylinder, and a required rotation time during the current combustion stroke, and integrates the calculated rotational variation. If it is determined that the number of times the rotational variation has been integrated has reached a predetermined number, the engine ECU calculates an amount of learning value deviation from the integrated rotational variation. If the amount of learning value deviation is equal to or greater than a certain amount, the engine ECU corrects a learning value of a sub-feedback control with respect to the air-fuel ratio. | 05-05-2011 |
| 20110126812 | CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - The present invention intends to perform control for detecting a change in air-fuel ratio with high accuracy by an exhaust gas sensor in an internal combustion engine having a turbocharger with a wastegate valve. A control apparatus for an internal combustion engine according to the present invention includes: a turbocharger; a wastegate through which an exhaust gas passes while bypassing a turbine; a wastegate valve for opening/closing the wastegate; an exhaust gas sensor provided in an exhaust passage on the downstream side from the turbine and the wastegate valve; and air-fuel ratio change detection controlling means for executing air-fuel ratio change detection control to change an air-fuel ratio on the upstream side from the turbine and the wastegate valve and detect a change in the air-fuel ratio by the exhaust gas sensor. The air-fuel ratio change detection controlling means executes the air-fuel ratio change detection control when the opening degree of the wastegate valve is less than a predetermined value. | 06-02-2011 |
| 20110132340 | FUEL ALCOHOL CONTENT DETECTION VIA AN EXHAUST GAS SENSOR - Various systems and methods are described for an exhaust gas sensor coupled to an exhaust system of an engine. One example method comprises, during selected engine fueling conditions, alternating between applying first and second voltages to the sensor; and identifying an amount of alcohol in fuel injected to the engine based on sensor outputs at the first and second voltages. | 06-09-2011 |
| 20110132341 | Delay Compensated Air/Fuel Control of an Internal Combustion Engine of a Vehicle - A fuel control approach that compensates for time delays to increase exhaust gas sensor feedback response speed. | 06-09-2011 |
| 20110132342 | FUEL ALCOHOL CONTENT DETECTION VIA AN EXHAUST GAS SENSOR - Various systems and methods are described for an exhaust gas sensor coupled to an exhaust system of an engine. One example method comprises, during selected engine fueling conditions, alternating between applying different voltages to the sensor; and identifying an amount of alcohol in fuel injected to the engine based on sensor outputs at the different voltages. | 06-09-2011 |
| 20110162629 | METHOD AND SYSTEM FOR CONTROLLING AN ENGINE DURING DIESEL PARTICULATE FILTER REGENERATION WARM-UP - A method and control system for controlling an engine during diesel particulate filter regeneration includes a diesel particulate filter (DPF) regeneration request module that generates a DPF regeneration request signal. The control system also includes a DPF regeneration control module that controls the oxygen level in the exhaust based on an oxygen level signal corresponding to an oxygen level in the exhaust and a DPF inlet temperature signal corresponding to the DPF inlet temperature. | 07-07-2011 |
| 20110174281 | CARBURETED NATURAL GAS TURBO CHARGED ENGINE - A control system for a turbo charged natural gas engine. A butterfly valve used for fuel control upstream of a carburetor provides non-linear flow response during opening and closing and a flow compensator compensates for the non-linear response. A throttle valve position sensor acts in association with a controller which compares the throttle valve position signal with a predetermined set point and thereby opens or closes the waste gate of the turbo charger which affects oxygen content in the exhaust. A compensator for a throttle valve used with electronic engine controllers is also provided. | 07-21-2011 |
| 20110174282 | INTERNAL COMBUSTION ENGINE SYSTEM, METHOD OF DETERMINING OCCURRENCE OF AIR-FUEL RATIO IMBALANCE THEREIN, AND VEHICLE - When an engine is in a predetermined steady operating state, a gradient accumulation average value ΔAulsa corresponding to the amount of change in the air-fuel ratio AF, detected by an air-fuel ratio sensor, over the period of time from when an upper peak is reached, at which the direction of change in the air-fuel ratio AF is inverted to when a lower peak is reached, at which the subsequent inversion of the direction occurs, is calculated (S | 07-21-2011 |
| 20110214650 | ENGINE-OUT NOX VIRTUAL SENSOR FOR AN INTERNAL COMBUSTION ENGINE - A method for controlling an internal combustion engine includes monitoring engine operation including a parameter descriptive of NOx generation within the engine, determining a fast transient NOx estimate with a dynamic model based upon the monitored engine operation, and during a fast transient engine operation including an increase in an operating state of the engine and a substantial closing of an exhaust gas recirculation valve, controlling an engine system based upon the fast transient NOx estimate. | 09-08-2011 |
| 20110220084 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method for operating an internal combustion engine ( | 09-15-2011 |
| 20110265773 | Composition and Method for Reducing NOx and Smoke Emissions From Diesel Engines at Minimum Fuel Consumption - A diesel fuel composition is disclosed, as well as a method for reducing NOx and smoke emissions from a diesel engine at minimum fuel consumption which comprises adding to the diesel engine at least one diesel fuel or blending component for a diesel fuel which has a combination of a low T50 in the range of from 190° C. to 280° C., a high cetane number in the range of from 31 to 60, and optionally a high distillation curve slope in the range of from 58° C. to 140° C., which combination is effective to afford a combination of the lowest NO | 11-03-2011 |
| 20110283981 | APPARATUS FOR ACQUIRING RESPONSIBILITY OF OXYGEN CONCENTRATION SENSOR - The fact that “with respect to a process in which the output value of a downstream air-fuel ratio sensor (sensor output value) is inverted from the minimum output value to the maximum output value during execution of an active control, the local maximum and minimum values of the secondary differential value of the sensor output value is widely affected by the size of the response delay of the downstream air-fuel ratio sensor and the size of the degree of the degradation of the three-way catalyst” is utilized. By preliminarily acquiring and memorizing, as maps, these relations obtained through an experiment, and applying the “local maximum and minimum values of the secondary differential value of the sensor output value” calculated from the transition of the sensor output value acquired during execution of the active control to the maps, the response delay (time constant) of the downstream air-fuel ratio sensor is acquired. | 11-24-2011 |
| 20110308506 | INTERNAL COMBUSTION ENGINE CONTROL DEVICE AND CONTROL METHOD THEREOF - An internal combustion engine control device and a control method therefore in which feedback control is performed such that a detected air-fuel ratio of exhaust gas detected on the basis of a critical electric current flowing in a solid electrolyte layer of an air-fuel ratio sensor when an air-fuel ratio detection voltage is applied between an exhaust-side electrode layer and an atmosphere-side electrode layer of the sensor matches a stoichiometric air-fuel ratio. When a parameter acquired as an imbalance determination parameter is larger than an imbalance determination threshold, an air-fuel ratio inter-cylinder imbalance state is determined to have occurred. The output responsiveness of the air-fuel ratio sensor when the air-fuel ratio changes from a lean to a rich (or changes in the opposite direction) is acquired, and when this output responsiveness is low, “a sensor responsiveness increasing voltage that is higher than the air-fuel ratio detection voltage” is applied between the exhaust-side electrode layer and the atmosphere-side electrode layer. | 12-22-2011 |
| 20120024272 | FUEL INJECTION AMOUNT CONTROL SYSTEM AND FUEL INJECTION AMOUNT CONTROL DEVICE FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - A fuel injection amount control system acquires a pre-correction air-fuel ratio imbalance index value that increases as the degree of ununiformity in the air-fuel ratio among cylinders increases, based on an output value of an upstream air-fuel ratio sensor, and obtains a value (intake air amount correlation value) corresponding to the intake air amount and a value (engine speed correlation value) corresponding to the engine speed over a period in which the pre-correction air-fuel ratio imbalance index value is acquired. Also, a post-correction air-fuel ratio imbalance index value is acquired by correcting the pre-correction air-fuel ratio imbalance index value based on the intake air amount correlation value and the engine speed correlation value, and the air-fuel ratio of the engine is controlled based on the post-correction air-fuel ratio imbalance index value. | 02-02-2012 |
| 20120024273 | FUEL INJECTION AMOUNT CONTROL SYSTEM, FUEL INJECTION AMOUNT CONTROL DEVICE, AND FUEL INJECTION AMOUNT CONTROL METHOD OF MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - A fuel injection amount control system acquires an air-fuel ratio imbalance index value that increases as the degree of ununiformity in the air-fuel ratio among cylinders increases, based on an output value of an upstream air-fuel ratio sensor, and acquires an imbalance index learned value by performing a first-order lag filtering operation for removing noise, on the air-fuel ratio imbalance index value. Also, the fuel injection amount is increased based on the imbalance index learned value. In the filtering operation, the time constant of the filter is set to a smaller value when a magnitude of a difference between the current value and the last value of the air-fuel ratio imbalance index value is equal to or larger than a threshold value. | 02-02-2012 |
| 20120031384 | METHOD AND APPARATUS FOR OPERATING A COMPRESSION IGNITION ENGINE - A method for operating an internal combustion engine includes monitoring oxygen concentration in an exhaust gas feedstream, a mass flowrate of intake air, and a commanded fuel pulse of fuel. A blend ratio of biodiesel fuel and petrodiesel fuel of the fuel is determined. Engine operation is controlled in response to the blend ratio of biodiesel fuel and petrodiesel fuel of the fuel. | 02-09-2012 |
| 20120060805 | AIR-FUEL RATIO CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - A air-fuel ratio control apparatus, applied to an internal combustion engine having a catalyst disposed in an exhaust passage of the engine, includes a downstream air-fuel ratio sensor (oxygen concentration cell type oxygen concentration sensor) disposed at a position downstream of the catalyst, and air-fuel ratio control means for controlling, based on an output value of the downstream air-fuel ratio sensor, an air-fuel ratio of a mixture supplied to the engine so as to change an air-fuel ratio of a catalyst inflow gas. Further, the air-fuel ratio control means controls the air-fuel ratio of the mixture supplied to the engine. | 03-15-2012 |
| 20120174900 | APPARATUS AND METHOD FOR DETECTING VARIATION ABNORMALITY IN AIR-FUEL RATIO BETWEEN CYLINDERS - According to a first aspect of the present invention, there is provided an apparatus for detecting variation abnormality in an air-fuel ratio between cylinders comprising a wide-range air-fuel ratio sensor and an O | 07-12-2012 |
| 20120186570 | Device Generating Exhaust Gas, Especially A Boat, Comprising A System For Determining The Volume Of Exhaust Gas - A device for generating exhaust gas including a exhaust gas channel and a system. The system includes: a plurality of Bragg gratings distributed in positions transversely to the direction of flow of an exhaust gas at the end of the exhaust gas channel; an optical wave guide structure includes at least one optical wave guide and the Bragg gratings; and a heating device arranged adjacently to the Bragg gratings and through which the Bragg gratings are subjected to heat, or a cooling device arranged adjacently to the Bragg gratings, through which the Bragg gratings can be subjected to cold. The optical wave guide structure and the heating device or the cooling device are arranged at the end of the exhaust gas channel at a distance from an outlet of the exhaust gas into the surroundings of the device. | 07-26-2012 |
| 20120255533 | CONTROL UNIT FOR FUEL SUPPLY REGULATION DURING A COLD-RUNNING PHASE OF AN INTERNAL COMBUSTION ENGINE, METHOD FOR FUEL SUPPLY REGULATION DURING A COLD-RUNNING PHASE OF AN INTERNAL COMBUSTION ENGINE, COMPUTER PROGRAM PRODUCT, COMPUTER PROGRAM, AND SIGNAL SEQUENCE - A control unit is provided for fuel supply regulation during a cold-running phase of an internal combustion engine, that includes, but is not limited to an input port for inputting a combustion signal about the presence of a rich or lean combustion of a fuel mixture in the internal combustion engine, a P-element for providing a P-manipulated variable, which sets a fuel reduction upon the presence of a rich combustion and sets a fuel increase upon the presence of a lean combustion, an I-element for providing an I-manipulated variable, which sets a fuel increase, and an output port for controlling a fuel supply, the P-manipulated variable and the I-manipulated variable substantially offsetting one another during the cold-running phase upon the presence of a rich combustion in the stationary state. | 10-11-2012 |
| 20130000620 | Internal Exhaust Gas Recirculation for Stoichiometric Operation of Diesel Engine - A method of stoichiometrically operating a diesel-fueled internal combustion engine. A control unit is provide with stored data representing, within a range of exhaust valve timing or event modifications, an amount of fresh air flow and exhaust gas residuals resulting from each modification. During operation of the engine, the control unit is used to determining a desired amount of exhaust gas residuals for a given engine load; accessing the stored data to determine a modification that will provide the desired amount of exhaust gas residuals; and generating a control signal that will result in the desired modification. | 01-03-2013 |
| 20140000575 | FUEL ALCOHOL CONTENT DETECTION VIA AN EXHAUST GAS SENSOR | 01-02-2014 |
| 20140130785 | EXHAUST GAS OXYGEN SENSOR FAULT DETECTION SYSTEMS AND METHODS USING FUEL VAPOR PURGE RATE - A diagnostic system for a vehicle includes an error module, an equivalence ratio (EQR) module, a threshold determination module, and a fault indication module. The error module determines an error value based on a difference between an amount of oxygen in exhaust measured by an exhaust gas oxygen sensor (EGO) upstream of a catalyst and an expected value of the amount. The EQR module selectively controls fuel injection based on the error value. The threshold determination module determines an error threshold based on a flow rate of fuel vapor from a vapor canister to an intake manifold of an engine. The fault indication module selectively indicates that a fault is present in the EGO sensor based on the error value and the error threshold. | 05-15-2014 |
| 20140261350 | ACTIVE CONTROL OF ONE OR MORE EGR LOOPS - Active control of one or more exhaust gas recirculation loops is provided to manage and EGR fraction in the charge flow to produce desired operating conditions and/or provide diagnostics in response to at least one of an oxygen concentration and a NOx concentration in the charge flow and in the exhaust flow. | 09-18-2014 |
| 20150096544 | METHOD AND DEVICE FOR REGULATING AN AIR-FUEL RATIO OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a method and to a regulating device for regulating an air-fuel ratio of an internal combustion engine ( | 04-09-2015 |
| 20150308363 | METHOD AND SYSTEM OF CONTROLLING EXHAUST AFTER-TREATMENT APPARATUS FOR VEHICLE - A system and method for controlling an exhaust after-treatment apparatus for vehicle are provided. The method includes detecting, by a controller, signals from a front lambda sensor and a rear lambda sensor of a Lean NOx Trap (LNT), when an engine is driven in a rich mode and acquiring, by the controller, a temperature of exhaust gas detected by a temperature sensor, when the engine is driven in a rich mode. Further the method includes comparing, by the controller, the signals from the front lambda sensor and the rear lambda sensor to detect a breakthrough time when a breakthrough occurs between the signals from the front lambda sensor and the rear lambda sensor. In addition, the controller is configured to determine an additional rich time period based on the breakthrough time and the temperature of exhaust gas. | 10-29-2015 |
| 20160076474 | AIR-FUEL RATIO CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - An air-fuel ratio control apparatus for an internal combustion engine is provided. A controller is programmed to perform correction amount guard control allowing adjustment of a correction amount by setting a limit on the correction amount when an appearance frequency of a state where an output value from a downstream sensor is leaner than a predetermined value is equal to or higher than a predetermined value. When a state where the output value from the downstream sensor is leaner than the predetermined value lasts for a duration equal to or longer than a predetermined time, an incorporation speed at which, during learning control, the correction amount for sub feedback control is incorporated into a learning value is set to a larger value that when the duration is shorter than the predetermined time, and performance of the correction amount guard control is suppressed until the learning control is completed. | 03-17-2016 |
| 20160102619 | METHODS AND SYSTEMS FOR DETERMINING A FUEL CONCENTRATION IN ENGINE OIL USING AN INTAKE OXYGEN SENSOR - Methods and systems are provided for estimating a fuel concentration in engine oil in an engine crankcase. In one example, an engine controller may adjust engine operation such as EGR flow and engine fueling based on the estimated fuel concentration in engine oil. The fuel concentration may be based on an output of an intake oxygen sensor when purge and EGR flow are disabled, engine oil temperature, and fuel composition. | 04-14-2016 |
| 20160115883 | METHOD AND SYSTEMS FOR AIRFLOW CONTROL - Various methods and systems are provided for controlling emissions. In one example, a controller is configured to respond to one or more of intake manifold air temperature (MAT), intake air flow rate, or a sensed or estimated intake oxygen fraction by changing an exhaust gas recirculation (EGR) amount to maintain particulate matter (PM) and NOx within a range, and then further adjusting the EGR amount based on NOx sensor feedback. | 04-28-2016 |
| 20160146142 | APPARATUS AND PROCESS FOR MEASURING GASEOUS EMISSIONS FROM AN ENGINE - A process for measuring methane emissions by an internal combustion engine includes connecting a methane sensor to an exhaust line of the internal combustion engine such that a portion of the gas in the exhaust line can enter the methane sensor, operating the internal combustion engine so as to produce the exhaust, measuring a methane concentration of the gas from the portion of the gas from the exhaust line with the methane sensor, and producing an output from the methane sensor corresponding to the methane concentration. The methane sensor is plumbed to the exhaust line. The methane concentration is continuously sampled by the methane sensor. The methane sensor can be an electrochemical cell, a catalytic methane sensor, or an infrared methane sensor. | 05-26-2016 |
