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公开(公告)号：US11215532B2
公开(公告)日：2022-01-04
申请号：US16865939
申请日：2020-05-04
摘要： Methods and systems are provided for an EGR system reverse hose diagnostic. In one example, a method includes executing the reverse hose diagnostic in response to an EGR flowrate exceeding a threshold flow rate.
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公开(公告)号：US20210332734A1
公开(公告)日：2021-10-28
申请号：US17369210
申请日：2021-07-07
申请人： DENSO CORPORATION
发明人： Marie HORIKAWA
摘要： The present invention is applied to an exhaust system provided with a three-way catalyst and a NOx catalyst which are provided in an exhaust passage of an engine and to which sulfur components in exhaust adhere and release the attached sulfur components by rich components in exhaust, and NOx sensors provided downstream of the catalysts. The NOx sensor is a limiting current type sensor. It is determined whether a sulfur release state is present in which a sulfur component is released from the three-way catalyst and the NOx catalyst. When it is determined that it is in the state of sulfur release, reaction suppression processing for suppressing the reaction between oxygen and sulfur components in the pump cell electrodes and the monitor cell electrodes of the NOx sensors is performed.
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公开(公告)号：US11131605B2
公开(公告)日：2021-09-28
申请号：US16443010
申请日：2019-06-17
摘要： An emissions test system includes a dilution tunnel, a clean circuit, a dirty circuit, and a sampling control module. The dilution tunnel is configured to receive exhaust gas from an engine and dilution gas from a dilution gas source. The clean circuit is configured to receive gas from the dilution tunnel. The dirty circuit is configured to receive gas from the dilution tunnel independent of the clean circuit. The sampling control module is configured to direct gas from the dilution tunnel to the dirty circuit when the engine is off at the start of a first test phase. The sampling control module is configured to direct gas from the dilution tunnel to the clean circuit at the end of the first test phase when the engine is switched on during the first test phase.
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公开(公告)号：US11112335B2
公开(公告)日：2021-09-07
申请号：US16008690
申请日：2018-06-14
摘要： A fluid quality sensor for measuring a quality of a fluid comprises a measurement section mounted to an output side of a pump for the fluid.
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公开(公告)号：US11078857B2
公开(公告)日：2021-08-03
申请号：US16754321
申请日：2018-10-09
申请人： Robert Bosch GmbH
IPC分类号： F02D41/14 , G01M15/05 , G01M15/10 , F01N11/00 , F02B77/08 , F02D41/28 , G05B13/02 , G06N3/08
摘要： A method for ascertaining emissions of a motor vehicle driven with the aid of an internal combustion engine in a practical driving operation. A machine learning system is trained to generate time curves of the operating variables with the aid of measured time curves of operating variables of the motor vehicle and/or of the internal combustion engine, and to then ascertain the emissions as a function of these generated time curves.
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公开(公告)号：US11054388B2
公开(公告)日：2021-07-06
申请号：US15988329
申请日：2018-05-24
申请人： DENSO CORPORATION
发明人： Tadakatsu Koyabu , Tomoo Kawase , Yuki Murayama , Ryozo Kayama , Akari Hasegawa , Shoki Shimizu
IPC分类号： G01N27/417 , G01N27/416 , G01N27/419 , F01N11/00 , G01M15/10 , G01N27/406 , G01N27/407 , G01N27/409 , G01N27/41
摘要： In a gas sensor, a pump cell adjusts a concentration of oxygen in a gas chamber based of a pump cell supply voltage. A sensor cell detects a concentration of a specific gas in a detection target gas after the pump cell has adjusted the concentration of oxygen. In a sensor control unit, a voltage switching part adjusts the pump cell supply voltage to be supplied to the pump cell. A pump cell output control part adjusts a variation range of a pump cell output current of the pump cell before and after a voltage switching process of the pump cell supply voltage to be within a predetermined variation range. A deteriorated state detection part detects a deteriorated state ratio of the sensor cell based on variation of an output current of the sensor cell due to the voltage switching process performed by the voltage switching part.
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公开(公告)号：US20210199538A1
公开(公告)日：2021-07-01
申请号：US17057477
申请日：2019-05-17
申请人： HORIBA, LTD.
摘要： An on-road driving test system includes a determination condition storing unit, a vehicle speed storing unit, a predicted vehicle speed distribution calculating unit, and a determining unit. The determination condition storing unit stores a determination condition including at least a vehicle speed distribution condition for determining whether an on-road driving test is valid. The vehicle speed storing unit stores an actual measured vehicle speed actually measured at each geographical point by one or more vehicles. The predicted vehicle speed distribution calculating unit calculates a predicted vehicle speed distribution based on the actual measured vehicle speed, the predicted vehicle speed distribution being a vehicle speed distribution predicted to be obtained if a vehicle is driven on a set driving route. The determining unit determines whether the predicted vehicle speed distribution satisfies the vehicle speed distribution condition.
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公开(公告)号：US11041777B2
公开(公告)日：2021-06-22
申请号：US16562823
申请日：2019-09-06
发明人： Sebastian Heinken , Christoph Nee
摘要： A method for checking the plausibility of a pressure sensor that, during the measurement of a differential pressure, records measured values, whereby the measured values from the pressure sensor are compared to reference values for the differential pressure calculated on the basis of a model; whereby in order to determine the plausibility, at least one deviation of the measured values from the reference values and a difference between a first slope of the changing measured values and a second slope of the changing reference values over the curve of the measured values are taken into account.
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公开(公告)号：US20210164371A1
公开(公告)日：2021-06-03
申请号：US16824092
申请日：2020-03-19
发明人： Minjae KIM , Seung Suk YOON
摘要： A method of controlling regeneration of a particulate filter which traps particulate matter contained in an exhaust gas may include: raising, by a controller, a temperature of the exhaust gas to regenerate the particulate filter by burning the trapped particulate matter when an amount of the particulate matter trapped in the particulate filter is greater than or equal to a predetermined amount. Raising the temperature of the exhaust gas may include: raising the temperature of the exhaust gas based on a first temperature difference compensation, and raising the temperature of the exhaust gas based on a second temperature difference compensation. In particular, the first and second temperature difference compensations are calculated based on a target temperature of the exhaust gas at an upstream of the particulate filter and an actual temperature of the exhaust gas at the upstream of the particulate filter.
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公开(公告)号：US10921220B2
公开(公告)日：2021-02-16
申请号：US16559186
申请日：2019-09-03
摘要： An exhaust sampling system includes a dilution tunnel in which exhaust gas from an engine is diluted with a diluent gas, a sample probe in fluid communication with the dilution tunnel, a sample collector, a first flow path in fluid communication with the sample probe and the sample collector, a source of fill gas, a second flow path in fluid communication with the source of fill gas and the sample collector, and a controller that selectively supplies the diluted exhaust gas to the sample collector through the first flow path during a test phase, and that selectively supplies the fill gas to the sample collector through the second flow path during the test phase. At least a portion of the second flow path is different than the first flow path.
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