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公开(公告)号：US20200332737A1
公开(公告)日：2020-10-22
申请号：US16387677
申请日：2019-04-18
摘要： A low speed pre-ignition detection, mitigation, and driver notification system and method utilize a controller to analyze a knock signal from a knock sensor to detect LSPI knock of the engine and in response to detecting the LSPI knock, enrich a fuel/air ratio of the engine and limit a torque output of the engine to a level that is less than a maximum torque output of the engine, and when enriching the fuel/air ratio of the engine and limiting the torque output of the engine does not mitigate the LSPI knock, output at least one message for a driver of the vehicle instructing the driver to take remedial action to mitigate the LSPI knock.
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2.发明申请公开(公告)号：US20190128196A1
公开(公告)日：2019-05-02
申请号：US15800395
申请日：2017-11-01
申请人： Shu Wang , William P. Attard , David Lawrence , Ethan E. Bayer , Tyler Tutton
发明人： Shu Wang , William P. Attard , David Lawrence , Ethan E. Bayer , Tyler Tutton
CPC分类号： F02D41/0077 , F02D41/0007 , F02D41/0065 , F02D41/0072 , F02D2041/0017 , F02D2200/0402 , F02D2200/703 , F02M26/02 , F02M26/06 , F02M26/28 , F02M26/47 , F02M2026/003
摘要： Systems and methods for a turbocharged gasoline engine utilize a controller configured to receive a set of parameters including a measured pressure delta across an exhaust gas recirculation (EGR) valve disposed in a low pressure EGR (LPEGR) system of the engine and a measured pressure at an outlet of a differential pressure (dP) valve disposed in and distinct from a throttle valve of an induction system of the engine. The controller is further configured to determine a set of modeled pressures based on the set of parameters, a target EGR valve mass flow, a target EGR valve delta pressure, a current dP valve mass flow, and a pressure at an outlet of the air filter, determine target positions for the EGR valve and the dP valve based on the set of modeled pressures, and control the EGR valve and the dP valve based on their respective target positions.
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3.发明申请公开(公告)号：US20200158042A1
公开(公告)日：2020-05-21
申请号：US16670584
申请日：2019-10-31
申请人： Tyler Tutton , William P. Attard
发明人： Tyler Tutton , William P. Attard
摘要： Calibration techniques for forced-induction engines having low pressure cooled exhaust gas recirculation (LPCEGR) systems include commanding an EGR to a fully-closed position, after the EGR valve has reached the fully-closed position, commanding the engine to operate at fixed steady-state conditions for a calibration period, wherein the fixed steady-state conditions comprise at least a fixed throttle valve angle, a fixed injected fuel mass, and a fixed cylinder air/fuel ratio (AFR), during the calibration period, increasingly opening the EGR valve and monitoring a AFR of exhaust gas produced by the engine, calibrating an EGR fraction estimation and EGR transport delay model based on previously measured and/or modeled total engine flow and the monitored exhaust gas AFR during the calibration period, and storing the calibrated model at a memory of a controller of the engine for future usage to improve engine operation.
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4.发明申请公开(公告)号：US20200158051A1
公开(公告)日：2020-05-21
申请号：US16676609
申请日：2019-11-07
申请人： Tyler Tutton , William P. Attard , Michael Barkey
发明人： Tyler Tutton , William P. Attard , Michael Barkey
IPC分类号： F02M26/08 , F02D41/00 , F02D9/08 , F02M26/48 , F02M35/10 , F02B37/00 , F02B75/18 , F02B37/18 , F02M26/43 , F02M26/23
摘要： Techniques for controlling a forced-induction engine having a low pressure exhaust gas recirculation (LPEGR) system comprise determining a desired differential pressure (dP) at an inlet of a boost device based on an engine mass air flow (MAF) and a speed of the engine, wherein the engine further comprises a dP valve disposed upstream from an EGR port and a throttle valve disposed downstream from the boost device, determining a desired EGR mass fraction based on at least the engine MAF and the engine speed, determining a maximum throttle inlet pressure (TIP) based on the engine speed, the desired EGR mass fraction, and a barometric pressure, and performing coordinated control of the dP valve and the throttle valve based on the desired dP and the maximum TIP, respectively, thereby extending EGR operability to additional engine speed/load regions and increasing engine efficiency.
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公开(公告)号：US20200158032A1
公开(公告)日：2020-05-21
申请号：US16681354
申请日：2019-11-12
申请人： David Lawrence , Ethan E. Bayer , William P. Attard , Shu Wang
发明人： David Lawrence , Ethan E. Bayer , William P. Attard , Shu Wang
摘要： Techniques for controlling a forced-induction engine having a low pressure cooled exhaust gas recirculation (LPCEGR) system comprise determining a target boost device inlet pressure for each of one or more systems that could require a boost device inlet pressure change as part of their operation and boost device inlet pressure hardware limits for a set of components in the induction system, determining a final target boost device inlet pressure based on the determined sets of target boost device inlet pressures and boost device inlet pressure hardware limits, and controlling a differential pressure (dP) valve based on the final target boost device inlet pressure to balance (i) competing boost device inlet pressure targets of the one or more systems and (ii) the set of boost device inlet pressure hardware limits in order to optimize engine performance and prevent component damage.
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6.发明申请公开(公告)号：US20200158038A1
公开(公告)日：2020-05-21
申请号：US16681344
申请日：2019-11-12
申请人： Shu Wang , Ethan E. Bayer , William P. Attard , David Lawrence
发明人： Shu Wang , Ethan E. Bayer , William P. Attard , David Lawrence
摘要： Engine low pressure cooled exhaust gas recirculation (LPCEGR) control techniques comprise receiving a measured position of an accelerator pedal and, based on this measurement, detecting a transient tip-out event or a transient tip-in event. In response to detecting the transient tip-out event, an EGR depletion rate is temporarily increased by at least one of (i) downstream throttle valve control to maintain at least a minimum engine airflow or to regulate a rate of decrease of the airflow into the engine, (ii) cylinder bank fuel shutoff, and (iii) pre-scheduled EGR valve control based on the measured accelerator pedal position. In response to detecting the transient tip-in event, an EGR delivery rate is temporarily increased by at least one of (i) the pre-scheduled EGR valve control and (ii) controlling intake/exhaust valves of cylinders of the engine to enable a scavenging mode.
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公开(公告)号：US20170328333A1
公开(公告)日：2017-11-16
申请号：US15150796
申请日：2016-05-10
CPC分类号： F02P5/152 , F02D35/027 , F02D35/028 , F02D41/1497 , F02D41/1498 , F02D2041/389 , F02D2200/1015 , F02P17/12 , F02P2017/128 , G01M15/12 , Y02T10/46
摘要： A system for and a method of knock detection and control for an engine utilizes a knock sensor configured to generate a knock signal indicative of a vibration of the engine caused by abnormal combustion. A controller is configured to receive the knock signal, determine, with respect to a crank angle of the engine, distinct monitoring windows for low speed pre-ignition (LSPI) knock and spark knock, respectively, based on (i) spark timing and (ii) an appropriate mass fraction burn (MFB) location, monitor the knock signal using the distinct monitoring windows, detect one of LSPI knock and spark knock based on the monitoring, and control the engine to mitigate the detected LSPI knock or spark knock.
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公开(公告)号：US20180171912A1
公开(公告)日：2018-06-21
申请号：US15386462
申请日：2016-12-21
CPC分类号： F16H63/502 , F02D41/0007 , F02D41/023 , F02D41/1454 , F02D41/1475 , F02D41/34 , F02D2200/101 , F02D2250/21 , F02D2250/22 , F02D2400/12 , F02P5/045 , F02P5/1504 , Y02T10/44 , Y02T10/46
摘要： Control systems and methods for a vehicle comprising an automatic transmission utilize a sensor configured to measure an operating parameter of an engine of the vehicle. A controller of the vehicle is configured to detect an imminent shift of the automatic transmission based on the measured operating parameter of the engine. In response to detecting the imminent shift of the automatic transmission, the controller is configured to decrease torque output of the engine by a desired amount by enleaning an air/fuel charge provided to a cylinder of the engine. After decreasing the torque output of the engine by the desired amount, the controller is configured to control the automatic transmission to perform the shift. The decreasing of the engine torque output provides for a smoother shift of the automatic transmission and increased engine fuel economy.
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