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公开(公告)号：US11551489B1
公开(公告)日：2023-01-10
申请号：US17455189
申请日：2021-11-16
发明人： Sitaram Rejeti , Adam Krach , Robert Roy Jentz
摘要： Methods and systems are provided for a coolant system. In one example, a method may include diagnosing a condition of a pump of the coolant system based on a temperature change of coolant. The diagnostic may determine if the pump is stuck on or off.
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公开(公告)号：US20200309051A1
公开(公告)日：2020-10-01
申请号：US16365285
申请日：2019-03-26
发明人： Tyler Kelly , Adam Krach
摘要： Methods and systems are provided for diagnosing valve operation during a cylinder deactivation event in a variable displacement engine. Crankshaft acceleration data is captured during an exhaust stroke of a deactivated cylinder and compared to a calibrated map of crankshaft acceleration data for the given cylinder. Based on the comparison, it may be indicated that the deactivation of the exhaust valve of the given cylinder sis degraded, and that the exhaust valve is open when commanded closed.
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公开(公告)号：US12104976B1
公开(公告)日：2024-10-01
申请号：US18505459
申请日：2023-11-09
发明人： Luis Juarez , Adam Krach , Vaibhav Khanna , Michael Joseph Giunta , Peter Turpel
IPC分类号： B60W10/10 , B60W10/06 , B60W50/02 , F02D13/02 , F16H57/04 , F16H59/36 , F16H59/72 , F16H59/78 , F16H61/12 , G01M13/02
CPC分类号： G01M13/02 , B60W10/06 , B60W10/10 , B60W50/0205 , F02D13/02 , F16H57/0415 , F16H59/36 , F16H59/72 , F16H59/78 , F16H61/12 , F16H2059/366 , F16H2061/1208 , F16H2061/1256
摘要： Systems and methods for diagnosing operation of a transmission warm-up valve are presented. In one example, the transmission warm-up valve is commanded to an open position and an estimated transmission fluid temperature is compared to an actual transmission fluid temperature to determine whether or not the transmission warm-up valve is operating as commanded.
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公开(公告)号：US11725612B1
公开(公告)日：2023-08-15
申请号：US17807028
申请日：2022-06-15
CPC分类号： F02M26/49 , F02D41/1446 , F02M26/14 , F02M26/47 , F02D2200/70
摘要： Systems and methods for determining whether or not a temperature sensor is degraded are presented. In one example, a determination of degradation of the temperature sensor is based on a difference between a temperature determined from output of the temperature sensor and an estimate of a temperature of a pressure sensor.
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公开(公告)号：US10329966B1
公开(公告)日：2019-06-25
申请号：US15849287
申请日：2017-12-20
发明人： John Rollinger , Jamie Hanshaw , Adam Krach
摘要： A variable cam timing system in an engine is provided. The variable cam timing system includes a camshaft receiving rotational input from a crankshaft. The camshaft includes a valve cam rotationally actuating a valve coupled to a cylinder and a null cam actuating a null follower including a null spring exerting a return force on the null cam during interaction between the null cam and the null follower, where the null follower is independent from the cylinder.
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公开(公告)号：US20190186307A1
公开(公告)日：2019-06-20
申请号：US15849287
申请日：2017-12-20
发明人： John Rollinger , Jamie Hanshaw , Adam Krach
CPC分类号： F01L1/34409 , F01L1/022 , F01L1/024 , F01L2001/3443 , F01L2001/34453 , F01L2001/34483 , F01L2201/00
摘要： A variable cam timing system in an engine is provided. The variable cam timing system includes a camshaft receiving rotational input from a crankshaft. The camshaft includes a valve cam rotationally actuating a valve coupled to a cylinder and a null cam actuating a null follower including a null spring exerting a return force on the null cam during interaction between the null cam and the null follower, where the null follower is independent from the cylinder.
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公开(公告)号：US20240309798A1
公开(公告)日：2024-09-19
申请号：US18182965
申请日：2023-03-13
发明人： Sitaram Rejeti , Adam Krach , Vaibhav Khanna , Luis Juarez
CPC分类号： F01P11/16 , F01P7/165 , F01P2007/146 , F01P2025/32 , F01P2025/40 , F01P2037/02 , F01P2060/045
摘要： Methods and systems are provided for diagnosing a stuck Active Transmission Warmup (ATWU) valve. In one example, a method for an ATWU valve monitoring routine of a vehicle comprises determining a temperature difference between an engine coolant temperature (ECT) and a transmission fluid temperature (TFT) over a duration before the ATWU valve is commanded from a closed position to an open position or from the open position to the closed position comparing a rate of change of the TFT before and after the ATWU valve is commanded to the open position or the closed position; and indicating a stuck ATWU valve based on at least one of the temperature difference, the TFT rate of change comparison, or a combination thereof, based on a calibration parameter.
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公开(公告)号：US20230417631A1
公开(公告)日：2023-12-28
申请号：US17809233
申请日：2022-06-27
发明人： Jose Francisco Martinez Leyva , Andrew Bagnasco , Tyler DeWine , Hassene Jammoussi , Adam Krach , Gladys Galicia
IPC分类号： G01M15/10
CPC分类号： G01M15/104
摘要： A method and system for monitoring an exhaust gas sensor coupled in an engine exhaust is provided. In one example, the method determines an estimate of an exhaust gas oxygen sensor time constant according to a correlation between a rate of change of a Lambda value and a system time constant.
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公开(公告)号：US20230399989A1
公开(公告)日：2023-12-14
申请号：US17806310
申请日：2022-06-10
发明人： Jose Francisco Martinez Leyva , Sumanth Reddy Dadam , Patrick Edward Smithberger , Adam Krach , Edward Doemer
CPC分类号： F02D41/0077 , F02D41/005 , F02M26/47 , F02D2200/0406 , F02D2200/703 , F02D2200/101 , F02D2200/021 , F02D2200/06
摘要： Methods and systems are provided for EGR valve diagnostic. In one example, a method includes providing a correction to a position of the EGR valve to compensate for an altitude of the vehicle. The compensation is based on a comparison of a pressure ratio to a curve rationalized with a barometric pressure.
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公开(公告)号：US11788480B2
公开(公告)日：2023-10-17
申请号：US17658218
申请日：2022-04-06
发明人： John Rollinger , Adam Krach
CPC分类号： F02D13/0257 , F02D41/0087 , F02D41/30
摘要： Systems and methods for determining which of an intake valve and an exhaust valve is to be deactivated first when an engine is operated in a variable displacement mode. In one example, an exhaust valve of the cylinder is deactivated before an intake valve of the cylinder when the engine is operated in a static variable displacement operating mode.
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