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公开(公告)号：US11333094B2
公开(公告)日：2022-05-17
申请号：US17058442
申请日：2018-06-06
摘要： A method for estimating the ageing of an exhaust gas sensor (16) placed in an exhaust line (14) of a diesel internal combustion engine (10) of an industrial vehicle (1) includes: —acquiring (S100) an initial value of an estimated remaining lifetime (50) of the exhaust gas sensor; —measuring (S102) the time spent by the engine in each of several predefined engine operation modes during a predefined time period; —for each of the engine operation modes, calculating (S104) a lifetime loss value depending on the time spent by the engine in said engine operation mode during the predefined time period and on a predefined ageing rate associated to said engine operation mode; —updating (S106) the estimated remaining lifetime value by subtracting each calculated lifetime loss value from the initial value.
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公开(公告)号：US11092336B2
公开(公告)日：2021-08-17
申请号：US16543729
申请日：2019-08-19
发明人： Yotaro Murakami
摘要： In a method for estimating water content of exhaust gas, a first gas concentration at a first position in an exhaust passage, a second gas concentration at a second position downstream of the first position, and a gas temperature at the second position are obtained. A saturated water vapor at the gas temperature is calculated as a water content at the second position. By using the water content at the second position and the second gas concentration, an excess air amount of a fuel-air mixture supplied to a combustion apparatus is calculated based on a chemical reaction formula of combustion of the mixture. By using the excess air amount and the first gas concentration, a water content at the first position is estimated.
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公开(公告)号：US20190219006A1
公开(公告)日：2019-07-18
申请号：US15870908
申请日：2018-01-13
摘要： A method of implementing start-stop in an internal combustion engine, the engine having exhaust gas recirculation (EGR) from at least one dedicated EGR (D-EGR) cylinder. For stopping the engine, the camshaft is locked, and a hydraulic cam phaser is used to cushion the engine inertia. The engine is stopped such that one of the D-EGR cylinders is in top-dead center position. For starting the engine, that D-EGR cylinder is fuel-injected, and exhaust bleed-off performed if necessary.
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公开(公告)号：US10337383B2
公开(公告)日：2019-07-02
申请号：US15457389
申请日：2017-03-13
IPC分类号： F01N9/00 , F02M26/04 , F01N3/20 , F02B37/22 , F02M26/46 , F01N3/10 , F02D41/14 , F02D41/00 , F02M26/06
摘要： A method for an engine employing an after-treatment (AT) system with an AT device for treating an engine exhaust gas includes detecting an actual concentration of a pollutant in the exhaust gas upstream of the AT device. The method additionally includes treating the exhaust gas via the AT device and directing the treated gas to an exhaust gas passage. The method also includes recirculating a portion of the treated exhaust gas from the exhaust gas passage to the engine's intake passage and determining efficiency of the AT device, after recirculating the portion of the treated exhaust gas, using the detected actual pollutant concentration. Furthermore, the method includes maintaining operation of the AT system when the determined AT device efficiency is at or above a predetermined value and activating a sensory signal indicative of the AT device having malfunctioned when the determined AT device efficiency is below the predetermined value.
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公开(公告)号：US20180283307A1
公开(公告)日：2018-10-04
申请号：US15474386
申请日：2017-03-30
IPC分类号： F02D41/22 , F02M25/022 , F02M25/028 , F02M26/46 , F02M26/49
CPC分类号： F02D41/222 , B60H1/32331 , F02B29/04 , F02D2200/0418 , F02M25/0225 , F02M25/0227 , F02M25/028 , F02M26/22 , F02M26/46 , F02M26/49 , Y02T10/40
摘要： A vehicle includes an engine air intake having a humidity sensor, and a system having a nozzle positioned in the air intake and fluidly connected to a reservoir. The vehicle has a controller configured to activate the system to deliver fluid from the nozzle into the intake while the engine is inoperative and generate a diagnostic code in response to a change in humidity measured by the sensor being less than a threshold value. A method of controlling a vehicle includes measuring a baseline humidity (H1) using a humidity sensor in an air intake of an engine, and controlling a misting system to mist fluid from a reservoir into the air intake and adjacent to the humidity sensor while the engine is inoperative. The method measures a post-fluid delivery humidity (H2) using the humidity sensor, and generates a diagnostic code based on a comparison of H1 and H2.
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公开(公告)号：US20180136183A1
公开(公告)日：2018-05-17
申请号：US15667048
申请日：2017-08-02
申请人： FUJITSU TEN LIMITED
发明人： Masatoshi HAGIWARA
CPC分类号： G01N33/0073 , F02D41/0052 , F02D41/0077 , F02D41/123 , F02D41/144 , F02D41/1454 , F02D41/1494 , F02D41/2464 , F02D2200/602 , F02M26/46 , G01N33/0036 , H05B1/0244 , H05B3/06 , Y02T10/47
摘要： An engine control device of a vehicle engine includes a processor that detects an operation state of the engine and controls an output of a heater which heats an intake air oxygen concentration sensor detecting oxygen concentration of intake air of the engine. The intake air includes a portion of exhaust gas recirculated to an intake passage of the engine as EGR gas. The processor controls the output of the heater, according to a detected operation state of the engine, so that the intake air oxygen concentration sensor enters one of (i) an active state where a temperature of the intake air oxygen concentration sensor becomes greater than or equal to an activation temperature, (ii) a semi-active state where the sensor temperature is lower than the activation temperature and higher than an inactivation temperature, and (iii) an inactive state where the sensor temperature is lower than the inactivation temperature.
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公开(公告)号：US09803590B2
公开(公告)日：2017-10-31
申请号：US13774319
申请日：2013-02-22
发明人： Ross Dykstra Pursifull , Imad Hassan Makki , Timothy Joseph Clark , Michael James Uhrich , Pankaj Kumar
IPC分类号： F02D41/22 , F02M25/022 , F02M35/10 , F02M26/46 , F02M26/49 , F28D21/00 , F02M35/16 , F02M25/06 , F02D41/14 , F02M26/06 , F02M26/08 , F02M26/10
CPC分类号： F02M25/0221 , F02D41/222 , F02D2041/1472 , F02D2200/0418 , F02M25/06 , F02M26/06 , F02M26/08 , F02M26/10 , F02M26/46 , F02M26/49 , F02M35/10393 , F02M35/168 , F28D2021/0085 , Y02T10/16 , Y02T10/40
摘要： Embodiments for diagnosing a humidity sensor are provided. One example method comprises, responsive to a humidity sensor test cycle, pumping air conditioning and windshield washer gas flows past a humidity sensor, and indicating humidity sensor degradation based on a response of the humidity sensor to the air conditioning and windshield washer gas flows. In this way, degradation of the humidity sensor may be indicated if the humidity sensed by the humidity sensor does not change responsive to the humidity sensor test cycle being initiated.
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公开(公告)号：US20170096955A1
公开(公告)日：2017-04-06
申请号：US15076290
申请日：2016-03-21
发明人： Do Geun JUNG
CPC分类号： F02D41/0055 , F01N11/00 , F01N2550/02 , F01N2900/1621 , F02D41/005 , F02D41/0235 , F02D41/1441 , F02D2200/1015 , F02M26/46 , F02M26/49 , Y02T10/47
摘要： A method for controlling an exhaust gas recirculation (EGR) system includes a first step of determining whether the EGR system is in an operation section under an ignition-on state, a second step of calculating a catalyst deterioration index with catalyst deterioration-diagnosing logic in a section that is determined to be the operation section of the EGR system, and for sensing an occurrence of a misfire in an engine with misfire-sensing logic, a third step of deciding whether the catalyst deterioration index is abnormal on a basis of a first predetermined value and whether a frequency of the misfire is abnormal on basis of a preset value for a reference duration, and a fourth step of controlling an opening amount of an EGR valve based on the decision of the abnormality of both the catalyst deterioration index and the misfire frequency.
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9.发明申请公开(公告)号：US20170074215A1
公开(公告)日：2017-03-16
申请号：US15360849
申请日：2016-11-23
CPC分类号： F02M26/46 , F02B37/00 , F02B37/007 , F02B37/16 , F02B37/18 , F02D41/0072 , F02D41/144 , F02D41/1454 , F02D41/1456 , F02D41/1495 , F02D41/222 , F02D2041/1431 , F02M26/04 , F02M26/05 , F02M26/16 , F02M26/21 , F02M26/47 , F02M26/52 , F02M35/10222 , F02M35/10373 , Y02T10/144 , Y02T10/47
摘要： Methods and systems are provided for diagnosing an intake oxygen sensor. In one example, a method may include indicating degradation of an intake oxygen sensor based on a first time constant of an output of the intake oxygen sensor and a second time constant of an output of a throttle inlet pressure sensor. The method may further include adjusting EGR flow based on the output of the intake oxygen sensor and the output of the throttle inlet pressure sensor when the intake oxygen sensor is not degraded.
摘要翻译： 提供了用于诊断进气氧传感器的方法和系统。 在一个示例中，方法可以包括基于进气氧传感器的输出的第一时间常数和节气门入口压力传感器的输出的第二时间常数来指示进气氧传感器的劣化。 该方法还可以包括当进气氧传感器不降级时，基于进气氧传感器的输出和节气门入口压力传感器的输出来调节EGR流量。
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公开(公告)号：US11261830B2
公开(公告)日：2022-03-01
申请号：US16531463
申请日：2019-08-05
申请人： Caterpillar Inc.
发明人： Ronald Silver , Jaswinder Singh , David M. Ginter , Paul Wang , Michael Bardell
摘要： The present disclosure relates to exhaust treatment systems and engine systems. In one implementation, an engine system comprises an engine comprising an intake manifold and an exhaust manifold, the engine configured to combust a fuel-air mixture received via the intake manifold and produce a flow of exhaust gases via the exhaust manifold. The engine system also comprises a turbocharger comprising a turbine, an exhaust passageway fluidly connecting the exhaust manifold of the engine to the turbine and an intake passageway fluidly connected to the intake manifold of the engine for supplying the fuel-air mixture, a catalyzed member positioned along the exhaust passageway between the engine and the turbine, and an exhaust gas recirculation (EGR) loop fluidly connected downstream of the catalyzed member and fluidly connected to the exhaust passageway and the intake passageway.
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