公开(公告)号：US10954873B2

公开(公告)日：2021-03-23

申请号：US16290365

申请日：2019-03-01

Applicant: Amit Shrestha ,  Bei Jin ,  Jingjing Li ,  Fadi Estefanous ,  Lurun Zhong ,  Singalandapuram Mahedevan Boopathi ,  Mitchell Ober

Inventor： Amit Shrestha ,  Bei Jin ,  Jingjing Li ,  Fadi Estefanous ,  Lurun Zhong ,  Singalandapuram Mahedevan Boopathi ,  Mitchell Ober

IPC: F02D41/14

Abstract: An emissions control system for a vehicle having an exhaust system with an exhaust gas conduit and a catalytic converter configured to receive exhaust gas from an engine is provided. In one example implementation, the system includes an engine controller configured to control the engine to adjust an air to fuel ratio (lambda) thereof. The engine controller is configured to operate the engine with at least one of the following lambda control strategies (i) a first control strategy comprising operating at a first reference lambda modified by a first percent kick, and a first rich lambda lag time shorter than a first lean lambda lag time, and (ii) a second control strategy comprising operating at a second reference lambda modified by a second percent kick, and a second rich lag time longer than a second lean lambda lag time, to thereby simultaneously meet predetermined NOx and CO emissions targets.

公开(公告)号：US09945812B2

公开(公告)日：2018-04-17

申请号：US14232645

申请日：2011-07-15

Applicant: Tamer H. Badawy ,  Fadi Estefanous ,  Naeim A. Henein

Inventor： Tamer H. Badawy ,  Fadi Estefanous ,  Naeim A. Henein

IPC: G01N27/62 ,  F02D35/02

CPC classification number: G01N27/62 ,  F02D35/021 ,  G01N27/626

Abstract: A system and method is provided for simultaneous ion current sensing and gas analysis. The system acquires an ion current signal and analyzes the composition of a corresponding gas sample.

公开(公告)号：US20220381189A1

公开(公告)日：2022-12-01

申请号：US17330627

申请日：2021-05-26

Applicant: Amit Shrestha ,  Fadi Estefanous ,  Lurun Zhong ,  Michael Barkey ,  Benjamin T Dean ,  Ethan E Bayer

Inventor： Amit Shrestha ,  Fadi Estefanous ,  Lurun Zhong ,  Michael Barkey ,  Benjamin T Dean ,  Ethan E Bayer

IPC: F02D13/02 ,  F02D41/14 ,  F02D41/06 ,  F02D41/04

Abstract: A stop/start system and method for an engine of a vehicle include a valve control system configured for full lift control of respective intake and exhaust valves of a plurality of cylinders of the engine and a controller of the engine configured to perform an engine stop event including initiating a fuel shutoff (FSO) event whereby fueling to the engine is disabled and the engine fully stops after a stop period and, in response to initiating the FSO event, commanding the valve control system to close each intake valve prior to closing its respective exhaust valve to (i) expel any residual gases from the cylinders during respective exhaust strokes prior to closing the respective exhaust valves, and (ii) prevent air-only intake and compression within the cylinders during the stop period to thereby mitigate or eliminate noise/vibration/harshness (NVH) caused by the air-only intake and compression.

公开(公告)号：US20220112868A1

公开(公告)日：2022-04-14

申请号：US17070396

申请日：2020-10-14

Applicant: Bogdan A. Nitu ,  Fadi Estefanous ,  Luron Zhong

Inventor： Bogdan A. Nitu ,  Fadi Estefanous ,  Luron Zhong

IPC: F02M26/06 ,  F02M26/16 ,  F02M26/38

Abstract: An internal combustion engine system includes an engine, an air intake system configured to provide intake air to the engine, and an exhaust system configured to receive exhaust gas from the engine. The engine system further includes a secondary air system including a pump, an exhaust gas recirculation (EGR) system, and a valve system operably associated with the secondary air system and the EGR system. The valve system is configured to operate in a secondary air mode where the pump is utilized to supply secondary air to the exhaust system, and an EGR mode where the pump is utilized to supply EGR to the air intake system.

公开(公告)号：US20180297581A1

公开(公告)日：2018-10-18

申请号：US15486542

申请日：2017-04-13

Applicant: Amit Shrestha ,  Fadi Estefanous ,  Lurun Zhong

Inventor： Amit Shrestha ,  Fadi Estefanous ,  Lurun Zhong

IPC: B60W20/15 ,  B60W10/06 ,  B60W10/08 ,  B60W10/11 ,  B60W30/19

Abstract: A vehicle powertrain control technique includes obtaining, by a controller, a set of parameters each indicative of a gear shift operation for an automatic transmission. Cased on the set of parameters, the controller detects whether a gear shift operation of the automatic transmission is imminent. In response to detecting that the gear shift operation of the automatic transmission is imminent, the controller (i) determines a desired reduction in powertrain output torque for performing the gear shift operation and (ii) controls the powertrain to temporarily reduce its torque output via a technique other than spark retardation. After reducing the powertrain output torque, the controller commands the automatic transmission to perform the gear shift operation. The temporary powertrain output torque reduction is achieved by controlling a variable valve control (VVC) system of an engine, such as commanding a lower valve lift profile, or decreasing power supplied to an electric motor.

公开(公告)号：US20140232414A1

公开(公告)日：2014-08-21

申请号：US14232645

申请日：2011-07-15

Applicant: Tamer H. Badawy ,  Fadi Estefanous ,  Naeim A. Henein

Inventor： Tamer H. Badawy ,  Fadi Estefanous ,  Naeim A. Henein

IPC: G01N27/62

CPC classification number: G01N27/62 ,  F02D35/021 ,  G01N27/626

Abstract: A system and method is provided for simultaneous ion current sensing and gas analysis. The system acquires an ion current signal and analyzes the composition of a corresponding gas sample.

Abstract translation: 提供了同时进行离子电流检测和气体分析的系统和方法。 系统获取离子电流信号并分析相应气体样品的组成。

公开(公告)号：US20200277911A1

公开(公告)日：2020-09-03

申请号：US16290365

申请日：2019-03-01

Applicant: Amit Shrestha ,  Bei Jin ,  Jingjing Li ,  Fadi Estefanous ,  Lurun Zhong ,  Singalandapuram Mahedevan Boopathi ,  Mitchell Ober

Inventor： Amit Shrestha ,  Bei Jin ,  Jingjing Li ,  Fadi Estefanous ,  Lurun Zhong ,  Singalandapuram Mahedevan Boopathi ,  Mitchell Ober

IPC: F02D41/14

Abstract: An emissions control system for a vehicle having an exhaust system with an exhaust gas conduit and a catalytic converter configured to receive exhaust gas from an engine is provided. In one example implementation, the system includes an engine controller configured to control the engine to adjust an air to fuel ratio (lambda) thereof. The engine controller is configured to operate the engine with at least one of the following lambda control strategies (i) a first control strategy comprising operating at a first reference lambda modified by a first percent kick, and a first rich lambda lag time shorter than a first lean lambda lag time, and (ii) a second control strategy comprising operating at a second reference lambda modified by a second percent kick, and a second rich lag time longer than a second lean lambda lag time, to thereby simultaneously meet predetermined NOx and CO emissions targets.

公开(公告)号：US10363921B2

公开(公告)日：2019-07-30

申请号：US15486435

申请日：2017-04-13

Applicant: Amit Shrestha ,  Fadi Estefanous ,  Lurun Zhong ,  Yang Liang

Inventor： Amit Shrestha ,  Fadi Estefanous ,  Lurun Zhong ,  Yang Liang

IPC: B60W20/17 ,  F02D41/00 ,  F02D13/02 ,  F16H63/50 ,  B60W10/06 ,  B60W10/08 ,  F02D41/10 ,  F02D11/02

Abstract: A control system and method for a vehicle having a powertrain comprising a torque generating system and an automatic transmission each utilize a pedal position sensor configured to measure a position of an accelerator pedal of the vehicle and a controller configured to, based on the accelerator pedal position, detect a pedal tip-in or tip-out event and, in response to detecting the pedal tip-in or tip-out event: (i) determine a desired output torque for the torque generating system corresponding to the pedal tip-in or tip-out event and (ii) command the torque generating system to gradually transition, over a period, from its current output torque to the desired output torque to mitigate clunk caused by abrupt contact between gear teeth of the torque generating system shaft and the automatic transmission shaft.

公开(公告)号：US20180297583A1

公开(公告)日：2018-10-18

申请号：US15486435

申请日：2017-04-13

Applicant: Amit Shrestha ,  Fadi Estefanous ,  Lurun Zhong ,  Yang Liang

Inventor： Amit Shrestha ,  Fadi Estefanous ,  Lurun Zhong ,  Yang Liang

IPC: B60W20/17 ,  F16H63/50 ,  B60W10/06 ,  B60W10/08 ,  F02D11/02 ,  F02D41/00 ,  F02D13/02

CPC classification number: B60W20/17 ,  B60W10/06 ,  B60W10/08 ,  B60W2540/10 ,  B60W2710/0633 ,  B60W2710/0672 ,  B60W2710/085 ,  B60Y2200/92 ,  B60Y2300/77 ,  B60Y2306/09 ,  F02D11/02 ,  F02D13/0226 ,  F02D41/0002 ,  F02D41/008 ,  F02D41/107 ,  F02D2041/001 ,  F16H63/50 ,  F16H2059/144 ,  Y10S903/93

Abstract: A control system and method for a vehicle having a powertrain comprising a torque generating system and an automatic transmission each utilize a pedal position sensor configured to measure a position of an accelerator pedal of the vehicle and a controller configured to, based on the accelerator pedal position, detect a pedal tip-in or tip-out event and, in response to detecting the pedal tip-in or tip-out event: (i) determine a desired output torque for the torque generating system corresponding to the pedal tip-in or tip-out event and (ii) command the torque generating system to gradually transition, over a period, from its current output torque to the desired output torque to mitigate clunk caused by abrupt contact between gear teeth of the torque generating system shaft and the automatic transmission shaft.

公开(公告)号：US10066589B2

公开(公告)日：2018-09-04

申请号：US15428632

申请日：2017-02-09

Applicant: Sairam Chittoor ,  Fadi Estefanous ,  Lurun Zhong

Inventor： Sairam Chittoor ,  Fadi Estefanous ,  Lurun Zhong

IPC: F02M35/104 ,  F02M35/12 ,  F02M35/10

CPC classification number: F02M35/1266 ,  F02M35/10026 ,  F02M35/10072 ,  F02M35/10085 ,  F02M35/10255 ,  F02M35/104

Abstract: An air intake system includes a plurality of intake runners configured to supply intake air to the engine, and an independent resonator system operably associated with the plurality of intake runners and including a plurality of individual resonator assemblies. Each individual resonator assembly is fluidly coupled to one intake runner of the plurality of intake runners. The plurality of individual resonator assemblies is configured to interact with at least one of sound and pressure waves generated in the engine to reduce engine noise and/or increase engine torque.