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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：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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