Class / Patent application number | Description | Number of patent applications / Date published |
073114740 | Exhaust gas recirculation system (EGR) | 19 |
20090000367 | MEASUREMENT METHODS AND MEASURING EQUIPMENT FOR FLOW OF EXHAUST GAS RE-CIRCULATION - In measurement methods and a measuring equipment for flow of exhaust gas re-circulation, in order to prevent performances of exhaust, fuel efficiency, and power output from deteriorating due to reasons such as large loss in pressure and time, a control delay during an excessive operation, and reduction in an exhaust gas re-circulation gas flow rate upon measuring an exhaust gas re-circulation gas flow rate, an exhaust gas re-circulation gas flow rate is measured by a plurality of measurement methods on the basis of an intake air flow rate and pressure before and after a heat exchanger installed at an exhaust gas re-circulation passage and the measurement methods are carried out by performing a mutual comparison of the measurement flow rates. Accordingly, it is possible to measure the exhaust gas re-circulation gas flow rate with high precise in a short response time without increasing loss in pressure, and thus to improve performances of exhaust, fuel efficiency, and power output. | 01-01-2009 |
20090107227 | EXHAUST GAS RECIRCULATION DISTRIBUTION VARIATION SENSING DEVICE - An exhaust gas recirculation distribution variation sensing device has a torque sensing section that senses instantaneous torque caused with combustion of fuel injected from an injector for each cylinder, an injection quantity sensing section that senses an actual injection quantity of the injected fuel for each cylinder and an exhaust gas recirculation distribution variation calculating section that calculates an exhaust gas recirculation distribution variation as a distribution variation of recirculated exhaust gas to respective cylinders based on a variation in the torque sensing value of the torque sensing section among the cylinders (i.e., a torque variation) and a variation in the injection quantity sensing value of the injection quantity sensing section among the cylinders (i.e., an injection quantity variation). | 04-30-2009 |
20090165544 | System and Method for Determining Non-Sensed Vehicle Operating Parameters - A method and system is provided for determining non-sensed vehicle operating parameters of a vehicle system. The method and system further provide for determining an engine air mass flow rate using the non-sensed vehicle operating parameters. A plurality of vehicle operating set-points may be determined using the non-sensed vehicle system operating parameters and the non-sensed engine air mass flow rate. A controller may use the vehicle operating set-points in order to control emissions of the vehicle system. | 07-02-2009 |
20090241654 | Thermal Gas Flowmeter - A high-accuracy EGR sensor is provided. A recirculation system is provided which controls the flow rate of EGR by use of the sensor. A thermal gas flowmeter includes a heating resistor disposed in a flow of gas to be measured for detecting the flow rate of the gas, and an external circuit electrically connected to the heating resistor for outputting a signal according to the flow rate of the gas to be measured using the heating resistor. The heating resistor is controlled to be heated at a temperature equal to or higher than a vapor film forming temperature for forming a vapor film. | 10-01-2009 |
20090266151 | Method and Device for Adapting the Efficiency of a Cooler in the Return Circuit of Exhaust Gas in an Internal Combustion Engine - A method for providing a specification about an efficiency of a cooler for recirculated exhaust gas in an internal combustion engine includes: measuring a temperature of the recirculated exhaust gas cooled by the cooler; and ascertaining the specification about the efficiency of the cooler as a function of the measured temperature of the cooled recirculated exhaust gas. With the aid of the specification about the efficiency of the cooler it is possible to determine a failure of the cooler or to calculate a temperature of the recirculated exhaust gas in order implement an engine control system of the internal combustion engine on the basis of a reliable temperature specification that is not influenced by lag effects. | 10-29-2009 |
20100307231 | METHOD FOR DIAGNOSING THE BYPASS FLAP OF AN EXCHANGER IN AN EXHAUST GAS RECIRCULATION SYSTEM - A method for diagnosing a failure of an EGR circuit in an engine that includes an EGR exchanger, an EGR valve, an EGR exchanger bypass duct, and a bypass flap located upstream from the EGR exchanger and the bypass circuit in order to adjust the proportion of exhaust gases flowing therethrough. The EGR circuit can be activated in a cooled mode in which the flap is shut and in a bypass mode in which the flap is open. The method estimates the temperature of the exhaust gases at the outlet of the EGR exchanger when the EGR circuit is in the bypass mode. | 12-09-2010 |
20110154891 | EGR RATIO MEASURING DEVICE - In order to improve a measurement accuracy of an EGR ratio and to downsize the device and to save labor, the EGR ratio measuring device comprises a pair of nondispersive infrared gas analyzers ( | 06-30-2011 |
20110174066 | Non-Intrusive EGR Monitor For A Hybrid Electric Vehicle - An EGR fault in an engine is detected by comparing actual MAP values with inferred MAP values, the latter being based on MAF and engine speed. Multiple pairs of inferred and actual MAP, some having low EGR and other having high EGR rate. The two values are expected to deviate at high EGR rate and to be nearly equal at low EGR rate. If no such deviation at high EGR, then a fault is determined. According to the present disclosure, the computation of inferred MAP includes a compensation for flow into the intake through a carbon canister system. Without such compensation, the EGR routine is applied to situations without flow from the canister. Such a limitation caused a problem in HEV vehicles, in which engine operating time is less than typical engine installations. Additionally, the confounding effects of rapid VVT movement are excluded from the computations. | 07-21-2011 |
20110247407 | METHOD FOR DIAGNOSING THE EXCHANGER BYPASS FLAP IN AN EXHAUST GAS RECIRCULATION CIRCUIT - A method for diagnosing a failure of an EGR circuit of an engine including an EGR exchanger, an EGR valve, a bypass duct of the EGR exchanger, and a bypass flap arranged upstream from the EGR exchanger and the bypass duct to adjust a proportion of exhaust gases flowing therethrough. The EGR circuit can be activated according to a cooled mode, in which the flap is shut, or according to a bypass mode, in which the flat is open. The method carries out, during a diagnosis phase, two activations of the flap, and measures an average of variations of the EGR gas temperature at an outlet of the EGR exchanger during the diagnosis phase. | 10-13-2011 |
20120240671 | ABNORMALITY DETECTION DEVICE FOR EGR DEVICE - An object of the present invention is to accurately detect an abnormality in an EGR device for an internal combustion engine with a supercharger, or more specifically, the inability of an EGR valve to fully close due, for instance, to trapped foreign matter. To achieve the object, the present invention provides an abnormality detection device for the EGR device. The abnormality detection device includes an O | 09-27-2012 |
20130145830 | APPARATUS FOR DIAGNOSING EXHAUST GAS RECIRCULATION AND METHOD THEREOF - An exhaust gas recirculation diagnosis device may include an EGR module that supplies an intake manifold with exhaust gas from an exhaust manifold, a MAP (manifold absolute pressure) sensor that measures pressure of the intake manifold, and a control portion that controls the EGR module such that the flow rate of the exhaust gas that is supplied from the exhaust manifold to the intake manifold is controlled by stages and monitors the value of the MAP sensor in a fuel cut off condition to diagnose whether the EGR module is faulty. The exhaust gas recirculation diagnosis device uses MAP sensor to perform exhaust gas recirculation and to diagnose the fault of the exhaust gas recirculation device. | 06-13-2013 |
20130145831 | SYSTEM AND METHOD FOR MONITORING EXHAUST GAS RECIRCULATION - A method and a system for monitoring exhaust gas recirculation are provided that measures a state of an engine, judges an applied system between a high-pressure EGR system and a low-pressure EGR system according to the measured state of the engine, and judges whether a system is erroneous by measuring the position of an EGR valve of an unapplied EGR system and comparing the position with a predetermined reference position. | 06-13-2013 |
20130298654 | METHOD FOR DIAGNOSING A VALVE OF A FLUID SUPPLY LINE - In a method for diagnosing a valve in a fluid supply line to a suction line of an air system of a combustion engine, the fluid supply line being is part of an exhaust-gas recirculation system or a crankcase ventilation system, when the valve is actuated, a first pressure in the suction line is monitored for change, and an error of the valve is detected if the change of the first pressure lies outside a specific reference range when the valve is actuated. | 11-14-2013 |
20140144219 | METHOD AND APPARATUS FOR DETERMINING ABNORMALITY IN EXHAUST GAS RECIRCULATION AMOUNT - An absolute value of a deviation of an actual EGR ratio, calculated in a current operational status of an engine | 05-29-2014 |
20140196527 | Method for diagnosing a low pressure exhaust gas recirculation system of an internal combustion engine and device for carrying out the method - A method and device for diagnosing a low pressure exhaust gas recirculation system (LPEGRS) of an internal combustion engine having an intake area for supplying fresh air which includes in succession in the flow direction a first section having a low pressure in which an air mass flow sensor is situated, a compressor and a second section having a high pressure, the engine exhaust area including a second section having a low exhaust gas pressure, and the LPEGRS which has an adjustable LPEGR valve recirculating at least a portion of the exhaust gas in the second section of the exhaust area to the first section of the intake area. The fresh air mass flow taken in is measured by the air mass flow sensor, the total mass flow flowing through the compressor being ascertained, the LPEGR mass flow being ascertained from the difference between the total mass flow and the fresh air mass flow taken in, an estimated value being calculated for the LPEGR mass flow, the difference between the ascertained LPEGR mass flow and the estimated value being formed, and an error signal being output for a deviation. The procedure is for detecting exhaust gas-relevant errors. | 07-17-2014 |
20150047425 | Method for specifying a malfunction of an exhaust gas recirculation system of an internal combustion engine of a motor vehicle and corresponding diagnostic device - A method for specifying a malfunction of an exhaust gas recirculation system of an internal combustion engine of a motor vehicle, including: setting a first operating point of the engine and a first operating state of the fresh air/exhaust gas system as vehicle conditioning in a first measurement setting; measuring volumetric efficiencies of the engine for the first measurement setting and for at least one additional measurement setting, and comparing the measured volumetric efficiencies with an engine characteristics map stored in a memory unit for volumetric efficiency values of the engine, and ascertaining whether a malfunction is present during the exhaust gas recirculation process based on the comparison; and specifying the malfunction of the exhaust gas recirculation system while taking into account the measuring results for the first measurement setting and for the at least one additional measurement setting and the stored engine characteristics map for volumetric efficiency values. | 02-19-2015 |
20150323421 | SYSTEM AND METHOD FOR ESTIMATING ENGINE EXHAUST MANIFOLD OPERATING PARAMETERS - A system and method are provided for estimating an operating parameter of an exhaust manifold of an engine. In the system, a flow value is determined that corresponds to a flow rate of exhaust gas through an EGR conduit fluidly coupled between the exhaust manifold and the intake manifold. The EGR conduit includes an exhaust gas cooler disposed in-line with the EGR conduit and a property of the exhaust gas exiting an exhaust gas outlet of the cooler is measured. The operating parameter of the exhaust manifold is estimated as a function of at least the flow value and the property of the exhaust gas exiting the exhaust gas outlet of the cooler. Illustratively, the operating parameter of the exhaust manifold may be exhaust manifold pressure and/or temperature. | 11-12-2015 |
20150330334 | METHOD FOR DETERMINING THE RECYCLED AIR FLOW RATE AND THE QUANTITY OF OXYGEN AVAILABLE AT THE INLET OF AN INTERNAL COMBUSTION ENGINE CYLINDER - A method includes:
| 11-19-2015 |
20150369105 | MONITORING COLD START EMISSION REDUCTION STRATEGY - A method for assessing a cold start emission reduction (CSER) strategy applied to an engine system is provided. The method determines a first accumulation value based on an estimated output signal that would result from applying a first control command to the engine system. The method determines a second accumulation value based on a measured output signal resulting from applying a second control command that implements the CSER strategy to the engine system. The method compares the first accumulation value and the second accumulation value. The method determines whether the applying the second command to the engine system achieved a performance threshold of the CSER strategy based on the comparing. | 12-24-2015 |