子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 61 | NOx sensor based output disablement in response to exhaust system high frequency pressure pulsations | US14196106 | 2014-03-04 | US09482136B2 | 2016-11-01 | Richard J. Ancimer; John Franklin Wright |
| Systems, methods and apparatus are disclosed for disabling control of one or more outputs of an internal combustion engine system in response to an engine-out NOx sensor during a high frequency pressure pulsation associated with the exhaust gas at the engine-out NOx sensor. A high frequency pressure pulsation event may be determined in response to a pressure sensor measurement, or in response to operating parameters of one or more components of the system indicating high torque output conditions, and/or by a blade position of a turbine adjacent the NOx sensor indicating passage of the exhaust gas pressure pulsations to the NOx sensor. | ||||||
| 62 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE | US15083449 | 2016-03-29 | US20160290269A1 | 2016-10-06 | Shuntaro OKAZAKI; Kenji SUZUKI; Hiroshi MIYAMOTO; Yuji MIYOSHI |
| An exhaust purification system comprising an exhaust purification catalyst, a downstream side air-fuel ratio sensor, and a control device performing air-fuel ratio control for controlling an air-fuel ratio of exhaust gas and abnormality diagnosis control for diagnosing the downstream side air-fuel ratio sensor. In the air-fuel ratio control, the control device alternately and repeatedly switches the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst between a rich air-fuel ratio and a lean air-fuel ratio. In the abnormality diagnosis control, the control device judges that the downstream side air-fuel ratio sensor has become abnormal when the air-fuel ratio of the exhaust gas is made the rich air-fuel ratio by the air-fuel control and the output air-fuel ratio of the downstream side air-fuel ratio sensor changes from an air-fuel ratio richer than a predetermined lean judged air-fuel ratio to an lean air-fuel ratio. | ||||||
| 63 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE | US15083378 | 2016-03-29 | US20160290268A1 | 2016-10-06 | Shuntaro OKAZAKI; Kenji SUZUKI; Hiroshi MIYAMOTO; Yuji MIYOSHI |
| An exhaust purification system comprises an exhaust purification catalyst, a downstream side air-fuel ratio sensor and a control device. The control device makes the air-fuel ratio of the exhaust gas change to an air-fuel ratio at a rich side from the prior air-fuel ratio as air-fuel ratio rich increasing control when the air-fuel ratio of the exhaust gas is made a rich air-fuel ratio and the output air-fuel ratio of the downstream side air-fuel ratio sensor is maintained at a lean judged air-fuel ratio or more, and judges that the downstream side air-fuel ratio sensor suffers from an abnormality, when, due to the air-fuel ratio rich increasing control, the air-fuel ratio of the exhaust gas is made to change to the rich side air-fuel ratio and the output air-fuel ratio of the downstream side air-fuel ratio sensor changes to the lean side. | ||||||
| 64 | Abnormality diagnosis apparatus for exhaust gas purification apparatus | US14718374 | 2015-05-21 | US09404405B2 | 2016-08-02 | Yoshitaka Nakamura; Satoshi Endo |
| The present invention provides an abnormality diagnosis apparatus for an exhaust gas purification apparatus having an SCR catalyst, with which a misdiagnosis of an abnormality in the SCR catalyst even though the SCR catalyst is normal can be suppressed. In the present invention, a NOx purification ratio is determined using an estimated NOx inflow amount as a parameter, and an abnormality in the SCR catalyst is diagnosed on the basis of the NOx purification ratio. According to the present invention, a minimum NH3 adsorption amount is determined as an NH3 adsorption amount of the SCR catalyst in a condition where an actual NOx inflow amount reaches a maximum. When the minimum NH3 adsorption amount equals or exceeds a predetermined amount, a determination is made as to whether or not a NOx purification ability of the SCR catalyst has deteriorated from a normal condition by comparing the NOx purification ratio with a first threshold. When the minimum NH3 adsorption amount is smaller than the predetermined amount, a determination is made as to whether or not the NOx purification ability of the SCR catalyst has been completely lost by comparing the NOx purification ratio with a second threshold that is smaller than the first threshold. | ||||||
| 65 | ABNORMALITY DIAGNOSIS DEVICE FOR A SENSOR (AS AMENDED) | US15024189 | 2014-09-24 | US20160215669A1 | 2016-07-28 | Arifumi MATSUMOTO; Tomoyuki KOGO; Taiga HAGIMOTO; Kenji FURUI; Akifumi UOZUMI |
| An incorrect or wrong diagnosis in abnormality diagnosis of a sensor is suppressed. Provided at the downstream side of an NOx selective reduction catalyst is a sensor which detects NOx and ammonia in an exhaust gas flowing out of the NOx selective reduction catalyst, and in which the NOx and the ammonia react with each other. An amount of decrease in an output of the sensor due to a reaction of the NOx and the ammonia in the sensor is calculated based on the NOx and the ammonia flowing out of the NOx catalyst, and an abnormality diagnosis of the sensor is carried out based on this amount of decrease in the output of the sensor. | ||||||
| 66 | ABNORMALITY DIAGNOSING APPARATUS | US14649276 | 2013-11-14 | US20160115849A1 | 2016-04-28 | Yousuke AOYAMA; Yuuji KAMODA; Natsuki TSUSHIMA |
| An abnormality diagnosing apparatus configured to diagnose abnormality of a fuel injection amount of a diesel engine includes: an oxidation catalyst provided in an exhaust gas passage; an exhaust gas temperature detector configured to detect an upstream-side exhaust gas temperature and a downstream-side exhaust gas temperature, the upstream-side exhaust gas temperature being an exhaust gas temperature on an upstream side of the oxidation catalyst, the downstream-side exhaust gas temperature being an exhaust gas temperature on a downstream side of the oxidation catalyst; and an abnormality determining unit configured to determine whether the fuel injection amount is excessive or not on the basis of comparison between the upstream-side exhaust gas temperature and the downstream-side exhaust gas temperature. | ||||||
| 67 | Apparatus, system, and method for aftertreatment control and diagnostics | US13541137 | 2012-07-03 | US09194273B2 | 2015-11-24 | John M. Janssen; Frederick H. Lindner; Matthew L. Schneider |
| A method includes providing an exhaust stream for an internal combustion engine, where the exhaust stream is fluidly coupled to an aftertreatment component. The method includes optically determining an amount of an exhaust gas constituent in the exhaust stream. The method further includes modifying a model stored on a computer readable medium in response to the amount of the exhaust gas constituent. The model is an engine NOx generation model, a catalyst NOx storage model, a catalyst NOx conversion model, a catalyst NO to NO2 conversion model, a catalyst conversion efficiency model, an engine soot generation model, and/or a urea hydrolysis model. | ||||||
| 68 | Abnormality judging system for exhaust gas purification apparatus of internal combustion engine | US14395587 | 2012-04-26 | US09188046B2 | 2015-11-17 | Yuriko Hagimoto |
| The abnormality of an NH3 sensor is judged highly accurately. For this purpose, an abnormality judging system for an exhaust gas purification apparatus of an internal combustion engine comprises a selective catalytic reduction NOx catalyst which is provided at an exhaust gas passage of the internal combustion engine and which reduces NOx by using NH3 as a reducing agent, a supply device which supplies the reducing agent from an upstream side from the NOx catalyst, a NOx sensor which detects NOx and NH3 on a downstream side from the NOx catalyst, and an NH3 sensor which detects NH3 on a downstream side from the NOx catalyst, wherein it is judged that the NH3 sensor has any abnormality if an absolute value of a difference between an estimated NH3 concentration as a difference between a detection value of the NOx sensor and an estimated value of a NOx concentration and an NH3 concentration detected by the NH3 sensor is not less than a threshold value when NH3 flows out from the selective catalytic reduction NOx catalyst. | ||||||
| 69 | Exhaust gas purification system abnormality diagnosing device and abnormality diagnosing method, and exhaust gas purification system | US13080233 | 2011-04-05 | US09068493B2 | 2015-06-30 | Kenichi Tanioka |
| An exhaust gas purification system abnormality diagnosing device includes: a sensor value detecting means that reads a sensor signal of a specified gas concentration sensor to detect a gas concentration; a limiting device controlling means which, when the gas concentration has become equal to or greater than a predetermined start-of-diagnosis threshold value or when a difference obtained by subtracting from the gas concentration an estimated NOx concentration on a downstream side of a selective reduction catalyst obtained by computation has become equal to or greater than a predetermined start-of-diagnosis threshold value, increases the quantity of ammonia capable of being adsorbed by the selective reduction catalyst by raising the pressure inside an exhaust gas passageway with a passageway area limiting device disposed on the downstream side of the selective reduction catalyst; and a determining means that determines the abnormal state on the basis of the gas concentration or the difference after the pressure inside the exhaust gas passageway has been raised. | ||||||
| 70 | Exhaust Gas Purification Apparatus for Internal Combustion Engine | US14402830 | 2012-05-22 | US20150132187A1 | 2015-05-14 | Kazuya Takaoka; Toru Kidokoro |
| An exhaust gas purification apparatus for an internal combustion engine is designed to prevent a decrease in the accuracy of measurement by a PM sensor (17). The apparatus includes an NOx catalyst (7) provided in an exhaust passage (3) of an internal combustion engine (1) to reduce NOx by reducing agent supplied to it, a supplying device (6) that supplies urea to the NOx catalyst (7) from the upstream of the NOx catalyst (7), the PM sensor (17) that detects the amount of particulate matter in the exhaust gas in the downstream of the NOx catalyst (7), and a restriction part (10) that restricts supply of urea by the supplying device (6) when the amount of particulate matter adhering to the NOx catalyst (7) is equal to or larger than a threshold. | ||||||
| 71 | Method of evaluating a fuel injector | US13979552 | 2012-02-07 | US09027530B2 | 2015-05-12 | Mats Moren |
| A method of calibration of at least one fuel injector for a fuel burner in an exhaust gas treatment system for an internal combustion engine is provided. The method is adapted for an exhaust gas system having the fuel burner mounted upstream of a diesel particle filter (DPF). The method of calibration is performed during an idle speed of the combustion engine, this to assure a constant temperature of the burner during the calibration. Hence, the method is started when a first steady tempera tore is registered in the fuel burner, wherein the at least one fuel injector, is operated with a first pulse width. A first temperature of an exhaust gas is registered directly downstream of the fuel burner. After this first temperature is registered, the pulse width, of the fuel injector changed into a second pulse width, which is different from the first pulse width. | ||||||
| 72 | ABNORMALITY JUDGING SYSTEM FOR EXHAUST GAS PURIFICATION APPARATUS OF INTERNAL COMBUSTION ENGINE | US14395587 | 2012-04-26 | US20150093292A1 | 2015-04-02 | Yuriko Hagimoto |
| The abnormality of an NH3 sensor is judged highly accurately. For this purpose, an abnormality judging system for an exhaust gas purification apparatus of an internal combustion engine comprises a selective catalytic reduction NOx catalyst which is provided at an exhaust gas passage of the internal combustion engine and which reduces NOx by using NH3 as a reducing agent, a supply device which supplies the reducing agent from an upstream side from the NOx catalyst, a NOx sensor which detects NOx and NH3 on a downstream side from the NOx catalyst, and an NH3 sensor which detects NH3 on a downstream side from the NOx catalyst, wherein it is judged that the NH3 sensor has any abnormality if an absolute value of a difference between an estimated NH3 concentration as a difference between a detection value of the NOx sensor and an estimated value of a NOx concentration and an NH3 concentration detected by the NH3 sensor is not less than a threshold value when NH3 flows out from the selective catalytic reduction NOx catalyst. | ||||||
| 73 | LOAD DRIVE APPARATUS AND SENSOR CONTROL APPARATUS | US14481210 | 2014-09-09 | US20150068278A1 | 2015-03-12 | Katsunori YAZAWA; Yoshinori INOUE |
| A load drive apparatus (1) includes a pulse drive circuit (51) which applies a pulse voltage PS to a resistive load (4); current detection means (S14) for detecting the current flowing to the resistive load (4) through the pulse drive circuit (51); level detection means (S1, S7) for determining whether an output terminal voltage VD of the pulse drive circuit (51) is a high potential level or a low potential level; anomaly detection means (S8, S9, S18) for detecting a wire breakage anomaly, a short-to-power anomaly, and a short-to-ground anomaly based on the level of the output terminal voltage VD detected by the level detection means (S1, S7) and the current detected by the current detection means (S14), when the pulse drive circuit 51 is turned on and off. | ||||||
| 74 | Warm-up system for exhaust system of internal combustion engine | US13580325 | 2011-09-06 | US08943814B2 | 2015-02-03 | Daisuke Shibata; Toru Kidokoro; Hiroshi Sawada; Kazuya Takaoka |
| A warm-up system for an exhaust system of an internal combustion engine includes an electronic control unit that performs warm-up control for warming up an exhaust system component upon start-up of the internal combustion engine and a failure diagnosis performing module of the electronic control unit that performs failure diagnosis for the exhaust system component after the completion of warm-up of the exhaust system component. If the internal combustion engine repeatedly stops before completion of the failure diagnosis for a predetermined period of time, then the electronic control unit changes the warm-up control performed upon start-up of the internal combustion engine to a control that raises the temperature of the exhaust system component more quickly than the warm-up control performed during the predetermined period. | ||||||
| 75 | FAILURE DETECTION APPARATUS FOR AN ELECTRICALLY HEATED CATALYST | US14359142 | 2011-12-20 | US20140292350A1 | 2014-10-02 | Mamoru Yoshioka |
| The present invention is intended to detect insulation failure of an EHC. In the invention, a heat generation element of the EHC is electrically insulated by an insulating member. Then, a determination as to whether insulation failure has occurred is made based on an insulation resistance value of the insulating member at the time when an amount of water absorption in the insulating member is smaller than a predetermined amount of water absorption and when an amount of PM deposition in the insulating member is smaller than a predetermined amount of PM deposition, a change in the insulation resistance value of the insulating member at the time when the amount of water absorption in the insulating member decreases from an amount equal to or larger than the predetermined amount of water absorption to an amount smaller than the predetermined amount of water absorption, and a change in the insulation resistance value of the insulating member at the time when the amount of PM deposition in the insulating member decreases from an amount equal to or larger than the predetermined amount of PM deposition to an amount smaller than the predetermined amount of PM deposition. | ||||||
| 76 | DEGRADATION DIAGNOSIS DEVICE AND DEGRADATION DIAGNOSIS METHOD FOR EXHAUST GAS SENSOR | US14125691 | 2012-06-18 | US20140102166A1 | 2014-04-17 | Tamikazu Kimura; Azusa Kobayashi; Noriko Yamanaka |
| Provided is a device for performing degradation diagnosis of a downstream-side exhaust gas sensor. When a diagnosis condition is met, an intake-air quantity is successively accumulated to obtain an intake-air-quantity accumulation value, an intake-air-quantity average value is obtained as an average of the intake-air quantity from the start of diagnosis, and, on the basis of this intake-air-quantity average value, an intake-air-quantity accumulation threshold value is set. When the intake-air-quantity accumulation value reaches the intake-air-quantity accumulation threshold value, the diagnosis is terminated, and an output reversal number of the downstream-side exhaust gas sensor during the diagnosis period is compared with a threshold value to judge whether the sensor is normal or degraded. By setting the intake-air-quantity accumulation threshold value on the basis of the intake-air-quantity average value, influence from the flow velocity of the exhaust gas passing through a catalytic device and the downstream-side exhaust gas sensor is removed. | ||||||
| 77 | Control device for internal combustion engine | US13520502 | 2011-01-24 | US08649957B2 | 2014-02-11 | Satoshi Yoshizaki; Shuntaro Okazaki; Masashi Shibayama; Kaoru Shokatsu; Hajime Kawakami |
| A control device is provided that generates a target air-fuel ratio by lessening a change speed of a required air-fuel ratio of an internal combustion engine. However, when a deterioration degree of a catalyst which is disposed in an exhaust passage of the internal combustion engine is a predetermined reference or more, lessening of the change speed of the required air-fuel ratio is stopped, or a lessening degree of the change speed of the required air-fuel ratio is decreased. The control device calculates a target air quantity for realizing the required torque under the target air-fuel ratio. For calculation of the target air quantity, data in which relationship of torque generated by the internal combustion engine and an air quantity taken into a cylinder is fixed by being related to an air-fuel ratio can be used. | ||||||
| 78 | APPARATUS, SYSTEM, AND METHOD FOR AFTERTREATMENT CONTROL AND DIAGNOSTICS | US13541137 | 2012-07-03 | US20140007559A1 | 2014-01-09 | John M. Janssen; Frederick H. Lindner; Matthew L. Schneider |
| A method includes providing an exhaust stream for an internal combustion engine, where the exhaust stream is fluidly coupled to an aftertreatment component. The method includes optically determining an amount of an exhaust gas constituent in the exhaust stream. The method further includes modifying a model stored on a computer readable medium in response to the amount of the exhaust gas constituent. The model is an engine NOx generation model, a catalyst NOx storage model, a catalyst NOx conversion model, a catalyst NO to NO2 conversion model, a catalyst conversion efficiency model, an engine soot generation model, and/or a urea hydrolysis model. | ||||||
| 79 | METHOD OF MONITORING A DIFFERENTIAL PRESSURE SENSOR OF AN EXHAUST GAS TREATMENT SYSTEM | US13490868 | 2012-06-07 | US20130327018A1 | 2013-12-12 | Vincent J. Tylutki; Benjamin Radke; Janean E. Kowalkowski |
| A method of monitoring a differential pressure sensor of an exhaust gas aftertreatment system includes sensing a learned value (n−1, n, n+1, n+2, etc.) of the differential pressure sensor for each after-run occurrence of the vehicle, and calculating an absolute value of a rate of change between a current (n) learned value of the differential pressure sensor and a previous (n−1) learned value of the differential pressure sensor. The absolute value of the rate of change is compared to a threshold pressure value to determine if the absolute value of the rate of change is greater than the threshold pressure value or is less than the threshold pressure value. A fault in the differential pressure sensor is signaled when the absolute value of the rate of change of the learned values is greater than the threshold pressure value. | ||||||
| 80 | METHOD AND APPARATUS FOR CONTROLLING A DIAGNOSTIC MODULE FOR AN EXHAUST GAS SENSOR | US13479747 | 2012-05-24 | US20130317727A1 | 2013-11-28 | Janean E. Kowalkowski; Jason J. Chung; Scott T. Feldmann; Chad E. Marlett |
| A method and apparatus for controlling a diagnostic module for an exhaust gas sensor in a vehicle is provided. The exhaust gas sensor is located in an exhaust pathway in the vehicle. The diagnostic module may be configured to perform a signal range verification of an oxygen sensor portion of the exhaust gas sensor. A controller is operatively connected to the exhaust gas sensor and to the vehicle engine. The controller disables the diagnostic module when one or more entry conditions are satisfied. The entry conditions may include requiring the engine speed to be greater than a fuel cut-off threshold, the fuel cut-off threshold being the engine speed at which the fuel to the engine is terminated. The entry conditions may include: no fuel being delivered to the engine; and a vehicle exhaust brake mode being activated such that the exhaust pathway from the engine is obstructed. | ||||||
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