Class / Patent application number | Description | Number of patent applications / Date published |
123568160 | With electrical means for fail-safe, backup, or malfunction detecting of EGR system | 22 |
20080202482 | EGR system for internal combustion engine - When the opening angle of an intake control valve is limited to a given opening angle by fuel cut, an EGR apparatus is activated, and a malfunction of the EGR apparatus is diagnosed on the basis of a change in intake manifold pressure before and after the activation of the EGR apparatus. When the control for reducing the intake-manifold negative pressure is not implemented, the change of the intake manifold pressure is corrected with a changing amount of first reference intake pressure (P(Ne)) changed by engine speed Ne. When the control for reducing the intake manifold genitive pressure is implemented, the change of the intake manifold pressure is corrected with a changing amount of second reference intake pressure (P | 08-28-2008 |
20080314371 | SYSTEM AND METHOD FOR DIESEL PARTICULATE FILTER REGENERATION - A method for regenerating a diesel particulate filter ( | 12-25-2008 |
20090126707 | ABNORMALITY DETERMINATION DEVICE AND METHOD FOR EGR DEVICE, AND ENGINE CONTROL UNIT - An abnormality determination device for an EGR device, which is capable of determining the abnormality of the EGR device properly without interrupting the EGR operation. An ECU of an internal combustion engine detects an amount of fresh air drawn into a combustion chamber of the engine, carries out feedback control of the fresh air amount such that the detected fresh air amount converges to a predetermined target fresh air amount by controlling an opening of a throttle valve disposed in an intake system of the engine during execution of EGR by the EGR device. The ECU obtains a decreasing degree parameter which represent a degree of decrease in the fresh air amount caused by the feedback control, and determines abnormality of the EGR device based on the obtained decreasing degree parameter. | 05-21-2009 |
20090283077 | EGR SYSTEM FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING THE SAME - An EGR system includes a high-pressure EGR unit and a low-pressure EGR unit. During the steady operation of an internal combustion engine, the high-pressure EGR gas and the low-pressure EGR gas are mixed with each other at a mixture ratio, in which the ratio of the high-pressure EGR gas amount to the entire EGR gas amount is higher than that in a known mixture ratio, and then recirculated back to the internal combustion engine. In the engine speed-up transitional operation period, the opening amount of a high-pressure EGR valve is adjusted to the opening amount that is much smaller than the target opening amount corresponding to the target operation mode. Thus, it is possible to suppress occurrence of the situation where the entire EGR gas amount is excessive in the period in which the low-pressure EGR gas amount does not decrease by a sufficient amount. | 11-19-2009 |
20100089371 | FORCED AIR INDUCTION SYSTEM FOR INTERNAL COMBUSTION ENGINE AND ABNORMALITY DIAGNOSIS METHOD FOR SAME SYSTEM - A forced air induction system for an internal combustion engine ( | 04-15-2010 |
20100186726 | CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - When an abnormality determining process is cancelled when a fuel cut is stopped, an EGR valve ( | 07-29-2010 |
20100294253 | ABNORMALITY DIAGNOSIS DEVICE FOR EXHAUST GAS RECIRCULATION DEVICE - An abnormality diagnosis device for an exhaust gas recirculation device in an internal combustion engine is provided. The exhaust gas recirculation device has an exhaust gas recirculation valve that adjusts the amount of recirculation exhausts gas returned from an exhaust passage to an intake passage of the engine. The abnormality diagnosis device includes a control section that changes the exhaust gas recirculation valve to diagnose an abnormality in the exhaust gas recirculation device. When the abnormality diagnosis execution condition is met, the control section, prior to the execution of the valve closing operation, inhibits the opening degree adjustment and executes a valve opening process to increase the opening degree of the valve from the opening degree at the time to a second target opening degree greater than the first target opening degree. | 11-25-2010 |
20110011378 | ABNORMALITY DIAGNOSIS APPARATUS FOR EXHAUST GAS RECIRCULATION APPARATUS AND ABNORMALITY DIAGNOSIS METHOD FOR EXHAUST GAS RECIRCULATION APPARATUS - An EGR apparatus includes an EGR passage that connects an intake passage and an exhaust passage of an internal combustion engine in order to introduce a part of an exhaust gas into the intake passage, and an EGR valve for adjusting the amount of exhaust gas flowing through the passage. An oxygen concentration sensor that outputs a continuous value corresponding to the oxygen concentration of the exhaust gas flowing through the exhaust passage is provided in the exhaust passage. Valve-opening driving is performed on the EGR valve during fuel cut processing for halting the fuel supply of the internal combustion engine, and when a variation range of the output value of the oxygen concentration sensor accompanying the valve-opening driving is smaller than a predetermined value, it is determined that an abnormality is present in the EGR apparatus. | 01-20-2011 |
20110023845 | METHOD OF DIAGNOSING A SLOW EGR SYSTEM IN AN INTERNAL COMBUSTION ENGINE - A method for diagnosing slow EGR response in an internal combustion engine equipped with an electronic controller with memory, comprising:
| 02-03-2011 |
20110023846 | LOW PRESSURE EXHAUST GAS RECIRCULATION APPARATUS - A low pressure EGR regulating valve is driven by an electric actuator, and an output of the electric actuator is transmitted to an intake air throttle valve through a link device. An ECU executes a failure determination to determine presence of a failure in a case where a sensed opening degree, which is sensed with a low pressure EGR opening degree sensor, is other than an opening degree that corresponds to a maximum opening degree of the throttle valve limited by a mechanical stopper. The ECU executes the failure determination after the energization of the electric actuator is stopped in response to stopping of the engine. | 02-03-2011 |
20120210987 | ABNORMALITY DETECTION DEVICE FOR EXHAUST GAS RECIRCULATION APPARATUS - An abnormality detection device for an exhaust gas recirculation apparatus is provided that can perform abnormality detection with respect to an EGR valve while suppressing the influence of a size relationship between an intake pressure and an exhaust pressure. An ECU (Electronic Control Unit) executes processing for extracting a pulse from an intake pipe pressure value. The ECU executes arithmetic processing for performing Fast Fourier Transform (FFT) with respect to an output waveform of an intake pressure sensor obtained by sampling processing, and also executes extraction processing that extracts a “frequency component corresponding to a period of an exhaust pulse”. The ECU executes processing that determines, in steps, whether or not the size of the extracted pulse (amplitude size) exceeds a threshold value. If the amplitude size exceeds the threshold value, the ECU executes processing that determines that a totally closed abnormality is occurring in the EGR valve. | 08-23-2012 |
20130014734 | METHOD FOR OPERATING AN EGR COOLER IN AN INTERNAL COMBUSTION ENGINEAANM BARBERO; SimoneAACI TorinoAACO ITAAGP BARBERO; Simone Torino ITAANM TROMBLEY; DouglasAACI TorinoAACO ITAAGP TROMBLEY; Douglas Torino ITAANM CIANFLONE; FrancescoAACI TorinoAACO ITAAGP CIANFLONE; Francesco Torino ITAANM MONTINARO; GiovanniAACI San Pietro Vernotico (BR)AACO ITAAGP MONTINARO; Giovanni San Pietro Vernotico (BR) IT - A method for operating an EGR system in an Internal Combustion Engine (ICE) is provided. The EGR system includes an EGR valve for regulating an exhaust gas flow into an EGR cooler and a by-pass line for by-passing the EGR cooler. The method includes monitoring an index value indicative of a clogging condition of the EGR cooler, closing the exhaust gas flow in the EGR cooler if the index value exceeds a predefined threshold, and opening the exhaust gas flow in the EGR cooler if the index value is decreasing. | 01-17-2013 |
20130042843 | SPECIFYING METHOD OF EGR RATE IN INTERNAL COMBUSTION ENGINE AND CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - To accurately specify an EGR rate from an output value of an in-cylinder pressure sensor, a specifying method of an EGR rate in an internal combustion engine of the present invention acquires an output value of an in-cylinder pressure sensor at an intake stroke to calculate comparison data related to an in-cylinder pressure at the intake stroke from the acquired sensor output value. An output value of the in-cylinder pressure sensor at an exhaust stroke of the same cycle is also acquired to calculate comparison data related to the in-cylinder pressure at the exhaust stroke from the acquired sensor output value. Two comparison data are compared to specify the EGR rate of an air-fuel mixture provided for combustion from a difference between the values. | 02-21-2013 |
20130068203 | METHOD OF DIAGNOSING SEVERAL SYSTEMS AND COMPONENTS BY CYCLING THE EGR VALVE - A method to operate an electronic controlled internal combustion engine to perform on board NOx emissions level diagnostics. In one embodiment, the method may include operating the engine to maintain a predetermined temperature for a predetermined period of time, determining whether the engine operating status is stable for one of cruise control, idle engine speed, engine torque, or high idle regeneration for a predetermined period of time, cycling the EGR valve between a first position for a predetermined period of time and then in a second position for a predetermined period of time, a determining a change in engine out NOx levels to determine whether an engine component or system is malfunctioning. | 03-21-2013 |
20130133634 | CONTROLLER FOR INTERNAL COMBUSTION ENGINE - While an engine is at idling state with an EGR valve fully closed, an EGRLQ is detected or estimated. When the EGRLQ exceeds a specified threshold, a target intake manifold pressure is established so that the EGRLQ becomes less than the specified value and an IAFRI-control is executed so that the intake manifold pressure becomes the target pressure. An intake air flow rate QIN can be increased and a differential pressure DP between upstream and downstream of the EGR valve | 05-30-2013 |
20130139795 | FAILURE DIAGNOSIS APPARATUS OF EGR SYSTEM - In the engine including an MPL-EGR system having an HPL-EGR mechanism | 06-06-2013 |
20130312716 | METHOD AND APPARATUS FOR MONITORING PERFORMANCE OF EGR HEAT EXCHANGER - An internal combustion engine is equipped with an EGR system that includes an EGR heat exchanger. A method for monitoring the EGR heat exchanger includes monitoring an EGR gas inlet temperature to the EGR heat exchanger, an EGR gas outlet temperature from the EGR heat exchanger, a coolant temperature and a mass EGR flowrate through the EGR heat exchanger for a present engine operating point. An actual thermal effectiveness of the EGR heat exchanger for the present engine operating point is determined. A maximum heat transfer coefficient for the EGR side of the EGR heat exchanger is determined for the present engine operating point. The EGR heat exchanger is regenerated when the actual heat transfer coefficient differs from the maximum heat transfer coefficient for the present engine operating point. | 11-28-2013 |
20130312717 | METHOD TO CONTROL AND DIAGNOSE AN EXHAUST GAS HEAT EXCHANGER - A method for controlling an exhaust gas recovery system for an engine includes generating a signal to control exhaust gas flow through an exhaust gas heat exchanger, and generating a diagnostic code based on a difference between coolant temperature downstream of the exhaust gas heat exchanger and coolant temperature downstream of the engine. A vehicle has an engine, and an exhaust heat recovery system with an exhaust gas heat exchanger, a first temperature sensor downstream of the engine, and a second temperature sensor downstream of the exhaust gas heat exchanger. A controller for the vehicle is configured to: (i) generate a signal to control exhaust gas flow through the exhaust gas heat exchanger, and (ii) generate a diagnostic code based on a difference between coolant temperature measured by the first and second temperature sensors. | 11-28-2013 |
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 |
20150128917 | METHOD AND SYSTEM FOR IMPROVED DILUTION TOLERANCE - Methods and systems are provided for expediting purging of LP-EGR from an air intake system during conditions of decreasing engine load. During a tip-out, an EGR valve is closed while the engine is shifted to a VDE mode of operation to improve engine tolerance to EGR at lower engine loads and until the EGR is sufficiently purged. A non-VDE mode is resumed if higher engine loads are restored, else, a deceleration fuel shut-off mode is selected if the tip-out continues to zero load. | 05-14-2015 |
20150330335 | EXHAUST DEVICE FOR INTERNAL COMBUSTION ENGINE - In an exhaust device for an internal combustion engine, a control device controls a motor based on an output signal of a sensor. The control device has a first valve position detector detecting a first valve position when a valve unit is biased to close using only a biasing force of a spring. The control device has a second valve position detector detecting a second valve position when the valve unit is biased to close using a driving force of the motor that is larger than the biasing force of the spring. The control device detects a foreign object between a valve object and a valve seat and detects a size of the foreign object based on a comparison result between the first valve position and the second valve position. | 11-19-2015 |
20150354442 | SYSTEM AND METHOD FOR DETERMINING TURBINE DEGRADATION AND MITIGATING TURBINE DEGRADATION IN A VARIABLE GEOMETRY TURBOCHARGER - A method for operating a vehicle system is described herein. The method includes indicating a variable geometry turbine degradation based on a comparison of a modeled set of turbine pressure values and a sensed set of turbine pressure values, each set of turbine pressure values including a pressure value upstream of the turbine and a pressure value downstream of the turbine and the variable geometry turbine positioned downstream of an engine cylinder. | 12-10-2015 |