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公开(公告)号：US10273906B2
公开(公告)日：2019-04-30
申请号：US15481383
申请日：2017-04-06
摘要： Methods and systems are provided for controlling exhaust catalyst temperature during an engine cold-start by water injection. In one example, a method may include during the engine cold-start, injecting water into an intake of an engine based on the exhaust catalyst temperature and accumulating water molecules within an exhaust catalyst to generate heat within the exhaust catalyst. In this way, by generating and storing heat within the exhaust catalyst, the exhaust catalyst may be heated up rapidly, thus reducing catalyst light-off time.
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公开(公告)号：US20180306673A1
公开(公告)日：2018-10-25
申请号：US16022034
申请日：2018-06-28
发明人： Michael McQuillen , Gopichandra Surnilla , Richard E. Soltis , Daniel A. Makled , John Joseph Virga
IPC分类号： G01M15/10 , G01N27/417
CPC分类号： G01M15/104 , G01N27/4175
摘要： The present description relates generally to methods and systems for detecting thermal aging and blackening in oxygen sensors. Thermal aging and blackening effects may be differentiated based on a monitored change in impedance in each of a pump cell and a Nernst cell of the oxygen sensor following application of an alternating voltage. In response to detection of thermal aging and/or blackening in the oxygen sensor corrective measures may be taken to ensure accurate oxygen estimation using the sensor.
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公开(公告)号：US20180291843A1
公开(公告)日：2018-10-11
申请号：US15481383
申请日：2017-04-06
IPC分类号： F02M25/022 , F02D41/06 , F01N11/00 , F02D41/02
CPC分类号： F02M25/0227 , F01N9/00 , F01N11/002 , F01N2560/028 , F01N2560/06 , F01N2570/22 , F01N2900/08 , F01N2900/1602 , F02D41/0025 , F02D41/0255 , F02D41/027 , F02D41/064 , F02D2200/0802 , F02D2200/101 , Y02T10/121
摘要： Methods and systems are provided for controlling exhaust catalyst temperature during an engine cold-start by water injection. In one example, a method may include during the engine cold-start, injecting water into an intake of an engine based on the exhaust catalyst temperature and accumulating water molecules within an exhaust catalyst to generate heat within the exhaust catalyst. In this way, by generating and storing heat within the exhaust catalyst, the exhaust catalyst may be heated up rapidly, thus reducing catalyst light-off time.
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公开(公告)号：US20180080896A1
公开(公告)日：2018-03-22
申请号：US15825864
申请日：2017-11-29
IPC分类号： G01N27/41 , F02D41/14 , G01N27/406
CPC分类号： G01N27/41 , F02D41/1456 , F02D41/1494 , G01N27/4067
摘要： Various methods are provided for compensating changes in the relation between impedance setpoint and operating temperature in an oxygen sensor. In one embodiment, a method of operating an oxygen sensor comprises adjusting an impedance setpoint based on a change in dry air pumping current of the oxygen sensor.
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公开(公告)号：US20180017008A1
公开(公告)日：2018-01-18
申请号：US15209625
申请日：2016-07-13
CPC分类号： F02D41/3005 , F02D41/1448 , F02D41/145 , F02D41/1454 , F02D41/18 , F02D41/26
摘要： Methods and systems are provided for estimating exhaust pressure based on an exhaust air/fuel ratio sensor. In one example, a method may comprise estimating an exhaust pressure based on periodic waveform outputs of an exhaust air/fuel ratio (AFR) sensor, and adjusting at least one engine operating parameter based on the estimated exhaust pressure. The exhaust pressure may be estimated based on one or more of the standard deviation and frequency of the periodic waveform outputs.
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公开(公告)号：US09828948B2
公开(公告)日：2017-11-28
申请号：US14956784
申请日：2015-12-02
IPC分类号： F02M25/00 , F02M25/022 , F02D41/14 , F02M25/028 , F02P5/145
CPC分类号： F02M25/0227 , F02D19/0655 , F02D19/12 , F02D41/0025 , F02D41/123 , F02D41/144 , F02D41/1441 , F02D41/1454 , F02D41/2451 , F02D2200/0612 , F02M25/028 , F02M26/08 , F02P5/1455 , F02P5/152 , F02P5/1527 , Y02T10/36 , Y02T10/46
摘要： Methods and systems are provided for accurately determining the composition of a knock control fluid using sensors already present in the engine system. An intake oxygen sensor is used to estimate the water and the alcohol content of a knock control fluid that is direct injected into an engine cylinder responsive to an indication of abnormal combustion. A change in the pumping current of the oxygen sensor due to the water content of the knock control fluid is distinguished from a change in the pumping current of the oxygen sensor due to the alcohol content of the knock control fluid, while compensating for interfering effects of intake air diluents on the change in pumping current.
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公开(公告)号：US09714619B2
公开(公告)日：2017-07-25
申请号：US15097145
申请日：2016-04-12
IPC分类号： F02B29/04 , F02D41/00 , F02M26/44 , G01M15/02 , F02D41/14 , F02P5/15 , F02M26/04 , F02M26/49 , F02M26/45 , F02M26/46 , F02M26/00
CPC分类号： F02D41/0065 , F02B29/04 , F02D41/0002 , F02D41/0007 , F02D41/0072 , F02D41/144 , F02D41/1494 , F02D41/1495 , F02D2200/0418 , F02M26/04 , F02M26/44 , F02M26/45 , F02M26/46 , F02M26/49 , F02M2026/001 , F02P5/1502 , G01M15/02 , Y02T10/146 , Y02T10/42 , Y02T10/46
摘要： Methods and systems are provided for indicating water at an oxygen sensor based on power consumption of a heating element of the oxygen sensor. In one example, water may be indicated at an oxygen sensor positioned in an intake of an engine responsive to power consumption of the heating element of the oxygen sensor increasing above a baseline level. Engine operating parameters may then be adjusted based on the water indication and the power consumption.
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公开(公告)号：US09709482B2
公开(公告)日：2017-07-18
申请号：US14626308
申请日：2015-02-19
IPC分类号： F02D41/14 , G01N7/00 , G01N19/10 , G01M15/10 , G01N27/407 , G01N27/419 , F02D41/00 , F02D41/12
CPC分类号： G01N19/10 , F02D41/0065 , F02D41/123 , F02D41/144 , F02D41/1454 , F02D41/1456 , F02D2041/1472 , F02D2200/0418 , G01M15/104 , G01N27/4074 , G01N27/419
摘要： Methods are provided for determining ambient humidity based on outputs from an intake air or exhaust gas sensor. In one example, an oxygen sensor may be operated as a variable voltage sensor, between a lower first voltage and a higher second voltage, to determine a dry air oxygen reading. Ambient humidity may then be determined based on the dry air oxygen reading and a third output of the oxygen sensor when operated at the lower first voltage and not in variable voltage mode.
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9.发明授权公开(公告)号：US09528448B2
公开(公告)日：2016-12-27
申请号：US14626623
申请日：2015-02-19
发明人： Daniel A. Makled , Gopichandra Surnilla , Richard E. Soltis , Evangelos P. Skoures , Jacobus Hendrik Visser , Timothy Joseph Clark , David James Scholl
CPC分类号： F02D19/088 , F02D19/084 , F02D35/0015 , F02D41/0025 , F02D41/1454 , F02D41/1456 , F02D41/1458 , F02D2200/0418 , F02D2200/0612 , G01M15/104 , Y02T10/36
摘要： Methods and systems are provided for determining an amount of alcohol in fuel injected into an engine based on outputs from an exhaust gas sensor. In one example, a method includes estimating a first fuel alcohol content based on an air-fuel ratio estimated with the exhaust oxygen sensor and estimating a second fuel alcohol content based on a change in sensor output during modulating a reference voltage of the exhaust oxygen sensor between a first and second voltage. The method further includes adjusting engine operation based on a difference between the first and second fuel alcohol contents.
摘要翻译： 提供了用于基于来自废气传感器的输出来确定喷射到发动机中的燃料中的醇的量的方法和系统。 在一个示例中，一种方法包括基于利用排气氧传感器估计的空燃比估计第一燃料酒精含量，并且基于在调节排气氧传感器的参考电压期间的传感器输出的变化来估计第二燃料酒精含量 在第一和第二电压之间。 该方法还包括基于第一和第二燃料酒精含量之间的差异来调节发动机操作。
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10.发明申请公开(公告)号：US20160369728A1
公开(公告)日：2016-12-22
申请号：US15257784
申请日：2016-09-06
CPC分类号： F02D41/1456 , F02B29/04 , F02B29/0468 , F02D41/0007 , F02D41/222 , F02D2200/0418 , F02M35/10393 , F02P5/1502 , Y02T10/144
摘要： Methods and systems are provided for estimating water storage in a charge air cooler (CAC). In one example, an amount of water in charge air exiting the CAC may be based on an output of an oxygen sensor positioned downstream of the CAC. Further, engine actuators may be adjusted to increase combustion stability and/or reduce condensate formation based on the amount of water exiting the CAC.
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