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公开(公告)号：US11603811B2
公开(公告)日：2023-03-14
申请号：US17303025
申请日：2021-05-18
发明人： Robert Jentz , Edward Doemer , Patrick Edward Smithberger , Sumanth Reddy Dadam , Sitaram Rejeti , Adam Krach , Dave Hagner
摘要： Methods and systems are provided for diagnostics of exhaust gas recirculation (EGR) components including an EGR pressure sensor. In one example, a method may include comparing a current relationship between an output of the EGR pressure sensor and a manifold air pressure (MAP) and a pre-calibrated relation between the output of the EGR pressure sensor and the MAP to detect degradation of the EGR pressure sensor.
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公开(公告)号：US11274637B1
公开(公告)日：2022-03-15
申请号：US17202129
申请日：2021-03-15
摘要： Methods and systems are provided for a high-pressure exhaust gas recirculation system. In one example, the high-pressure exhaust gas recirculation system comprises pressure sensors arranged on different sides of an EGR valve. Feedback from the pressure sensors are used to diagnose a EGR valve position sensor.
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公开(公告)号：US10961884B1
公开(公告)日：2021-03-30
申请号：US16787616
申请日：2020-02-11
摘要： Methods and systems are provided for operating a vehicle that includes an exhaust gas heat recovery device having an exhaust heat recovery device valve that may be selectively opened and closed. In one example, a method may include storing heat from exhaust gases in a phase changing material and releasing the stored heat to surroundings of an exhaust heat recovery device valve to reduce a possibility of the exhaust heat recovery device valve sticking.
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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：US20210040911A1
公开(公告)日：2021-02-11
申请号：US16536138
申请日：2019-08-08
摘要： Methods and systems are provided for monitoring a status of a heater core isolation valve (HCIV) housing in an engine coolant circuit including a first coolant loop and a second coolant loop. In one example, a method may include indicating degradation of the HCIV based on a difference between a first coolant loop temperature and a second coolant loop temperature upon activation of coolant system pumps and deactivation of a positive temperature coefficient (PTC) heater housed in the cabin heating loop.
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公开(公告)号：US10060333B2
公开(公告)日：2018-08-28
申请号：US15144394
申请日：2016-05-02
摘要： Methods are provided for engine coolant system diagnostics. In one example, engine coolant system malfunction is indicated based on an engine coolant temperature inference model, whereas in another example engine coolant system malfunction is indicated based on a time-based monitor, where the inference model is enabled at ambient temperatures above a predetermined threshold, and where the time-based monitor is enabled at ambient temperatures below the predetermined threshold. In this way, accurate engine coolant system diagnosis may be accomplished under ambient temperature conditions wherein the engine coolant temperature inference model may be compromised.
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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：US11965472B1
公开(公告)日：2024-04-23
申请号：US18078462
申请日：2022-12-09
IPC分类号： F02D41/14
CPC分类号： F02D41/1443 , F02D41/1454 , F01N2560/025 , F02D2200/101
摘要： A vehicle includes an internal combustion engine having a plurality of cylinders, a sensor configured to generate a sensor signal correlated with an air-fuel ratio of first and second cylinders of the plurality of cylinders, and a controller in communication with the sensor and programmed to monitor the air-fuel ratio of the first cylinder in response to an indication that air-fuel ratio measurements of the first cylinder satisfy predetermined criteria for current engine operating conditions while air-fuel ratio measurements of the second cylinder do not satisfy the predetermined criteria for the current engine operating conditions.
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公开(公告)号：US20220372937A1
公开(公告)日：2022-11-24
申请号：US17303025
申请日：2021-05-18
发明人： Robert Jentz , Edward Doemer , Patrick Edward Smithberger , Sumanth Reddy Dadam , Sitaram Rejeti , Adam Krach , Dave Hagner
摘要： Methods and systems are provided for diagnostics of exhaust gas recirculation (EGR) components including an EGR pressure sensor. In one example, a method may include comparing a current relationship between an output of the EGR pressure sensor and a manifold air pressure (MAP) and a pre-calibrated relation between the output of the EGR pressure sensor and the MAP to detect degradation of the EGR pressure sensor.
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公开(公告)号：US11459964B2
公开(公告)日：2022-10-04
申请号：US17114073
申请日：2020-12-07
发明人： Dave Hagner , Sumanth Dadam , Sitaram Rejeti , Edward Doemer , Robert Jentz , Patrick Edward Smithberger
摘要： Methods and systems are provided for a high-pressure exhaust gas recirculation system. In one example, the high-pressure exhaust gas recirculation system comprises pressure seconds arranged on different sides of a valve. The pressure sensors are used to regulate exhaust-gas recirculate flow without a fixed orifice delta pressure sensor.
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