公开(公告)号：US10030592B2

公开(公告)日：2018-07-24

申请号：US15839126

申请日：2017-12-12

Applicant: Ford Global Technologies, LLC

Inventor： Gopichandra Surnilla ,  Richard E. Soltis ,  Daniel A. Makled

IPC: F02D19/06 ,  F02D41/00 ,  F02D19/12 ,  F02D41/14

Abstract: Methods and systems are provided for adjusting the amount of secondary fluid being injected into an engine. In one example, a method may include adjusting an amount of secondary fluid injected at an engine cylinder based on a secondary fluid injection amount estimated from outputs of an exhaust oxygen sensor. For example, the secondary fluid injection amount may be estimated based on a first change in pumping current of the exhaust oxygen sensor between a first and second reference voltage when only fuel is injected into the engine cylinder and a second change in pumping current of the exhaust oxygen sensor between the first and second reference voltage when fuel and the secondary fluid are injected into the engine cylinder.

公开(公告)号：US20180100458A1

公开(公告)日：2018-04-12

申请号：US15839126

申请日：2017-12-12

Applicant: Ford Global Technologies, LLC

Inventor： Gopichandra Surnilla ,  Richard E. Soltis ,  Daniel A. Makled

IPC: F02D41/00 ,  F02D19/12 ,  F02D41/14

CPC classification number: F02D41/0025 ,  F02D19/12 ,  F02D41/1456 ,  F02D2041/1472 ,  Y02T10/36

Abstract: Methods and systems are provided for adjusting the amount of secondary fluid being injected into an engine. In one example, a method may include adjusting an amount of secondary fluid injected at an engine cylinder based on a secondary fluid injection amount estimated from outputs of an exhaust oxygen sensor. For example, the secondary fluid injection amount may be estimated based on a first change in pumping current of the exhaust oxygen sensor between a first and second reference voltage when only fuel is injected into the engine cylinder and a second change in pumping current of the exhaust oxygen sensor between the first and second reference voltage when fuel and the secondary fluid are injected into the engine cylinder.

公开(公告)号：US09920699B1

公开(公告)日：2018-03-20

申请号：US15298016

申请日：2016-10-19

Applicant: Ford Global Technologies, LLC

Inventor： Michael McQuillen ,  Gopichandra Surnilla ,  Daniel A. Makled ,  Richard E. Soltis

IPC: F02B47/08 ,  F02D41/00 ,  F02D41/14 ,  F02M26/46

CPC classification number: F02D41/0072 ,  F02D19/0636 ,  F02D19/084 ,  F02D19/088 ,  F02D41/0025 ,  F02D41/08 ,  F02D41/123 ,  F02D41/1454 ,  F02D2041/1472 ,  F02M26/46

Abstract: Methods and systems are provided for estimating an amount of exhaust gas recirculation (EGR) from an exhaust passage into an intake passage of an engine system by operating an exhaust oxygen sensor in a variable voltage (VVs) mode. In one example, a method includes during operation of an exhaust oxygen sensor in the VVs mode where a reference voltage of the exhaust oxygen sensor is adjusted from a lower, first voltage to a higher, second voltage, adjusting engine operation based on the EGR amount estimated based on an output of the exhaust oxygen sensor and a learned correction factor based on the second voltage. In this way, the exhaust oxygen sensor may be used to correct for variations arising due to changing fuel composition and ambient humidity and further used to estimate the amount of EGR being recirculated in the system, thereby enhancing engine fueling and EGR control.

公开(公告)号：US09885685B2

公开(公告)日：2018-02-06

申请号：US14512342

申请日：2014-10-10

Applicant: Ford Global Technologies, LLC

Inventor： Gopichandra Surnilla ,  Richard E. Soltis ,  Daniel A. Makled

IPC: G01N27/407 ,  G01N27/41 ,  G01N27/406 ,  F02D41/14

CPC classification number: G01N27/41 ,  F02D41/1456 ,  F02D41/1494 ,  G01N27/4067

Abstract: Various methods are provided for compensating changes in the relation between impedance setpoint and operating temperature in an oxygen sensor. In one embodiment, a method of operating an oxygen sensor comprises adjusting an impedance setpoint based on a change in dry air pumping current of the oxygen sensor.

公开(公告)号：US20170298852A1

公开(公告)日：2017-10-19

申请号：US15639928

申请日：2017-06-30

Applicant: Ford Global Technologies, LLC

Inventor： Gopichandra Surnilla ,  Michael McQuillen ,  Daniel A. Makled ,  Richard E. Soltis ,  Stephen B. Smith

IPC: F02D41/14 ,  F02D41/22 ,  G01N27/407 ,  G01N15/06 ,  G01N27/406 ,  H05B1/02

CPC classification number: F02D41/1494 ,  F02D41/144 ,  F02D41/1454 ,  F02D41/222 ,  G01N15/0656 ,  G01N27/4067 ,  G01N27/4077 ,  H05B1/0236

Abstract: Methods and systems are provided for adjusting heater power of an oxygen sensor. In one example, a method for an engine includes adjusting heater power of a heating element of the oxygen sensor when the heater power increases by a threshold amount. The method includes subsequently increasing heater power back to a baseline power level responsive to a temperature of the heating element.

公开(公告)号：US20170211495A1

公开(公告)日：2017-07-27

申请号：US15005989

申请日：2016-01-25

Applicant: Ford Global Technologies, LLC

Inventor： Lyth Alobiedat ,  Gopichandra Surnilla ,  Daniel A. Makled ,  Mohannad Hakeem ,  Richard E. Soltis ,  Michael McQuillen ,  Stephen B. Smith

IPC: F02D41/14 ,  F01N13/00 ,  F02D41/28 ,  G01M15/10

CPC classification number: F02D41/1454 ,  F01N13/008 ,  F02D41/1441 ,  F02D41/1456 ,  F02D41/1458 ,  F02D41/1486 ,  F02D41/28 ,  F02D2041/281 ,  G01M15/104

Abstract: A method for an engine may comprise, responsive to a first condition comprising a reference voltage of a first exhaust oxygen sensor operating in variable voltage mode increasing above a threshold voltage, determining a change in an output of the first exhaust oxygen sensor corresponding to the increase in the reference voltage, correcting the output of the first oxygen sensor based on the output change, and adjusting engine operation based on the corrected output. In this way, the accuracy of air-fuel estimates based on the exhaust gas sensor can be preserved, and closed loop fuel control of the engine can be maintained even when the exhaust oxygen sensor is operating VVS mode, thereby reducing engine emissions, increasing fuel economy, and increasing vehicle drivability.

公开(公告)号：US20170204800A1

公开(公告)日：2017-07-20

申请号：US14997309

申请日：2016-01-15

Applicant: Ford Global Technologies, LLC

Inventor： Daniel A. Makled ,  Michael McQuillen ,  Gopichandra Sumilla ,  Richard E. Soltis

IPC: F02D41/14 ,  F02D41/26 ,  F02M35/10 ,  F02D41/20 ,  B60W20/10 ,  F01N13/00

CPC classification number: F02D41/1458 ,  B60W20/10 ,  F01N9/00 ,  F01N13/008 ,  F01N2560/025 ,  F01N2590/11 ,  F01N2900/08 ,  F01N2900/10 ,  F01N2900/12 ,  F02D35/0015 ,  F02D41/042 ,  F02D41/123 ,  F02D41/144 ,  F02D41/1456 ,  F02D41/1495 ,  F02D41/20 ,  F02D41/222 ,  F02D41/263 ,  F02D2041/2051 ,  F02D2200/0406 ,  F02D2200/0408 ,  F02D2200/0418 ,  F02D2200/101 ,  F02D2200/704 ,  F02M35/10393 ,  Y02T10/40 ,  Y02T10/47

Abstract: Methods and systems are provided for leveraging the pressure dependency of an oxygen sensor for estimating an engine ambient pressure. An intake or exhaust oxygen sensor is used for ambient pressure estimation by applying a reference voltage to the sensor while the engine is being pulled-down in a hybrid vehicle, and correcting an output of the sensor for dilution effects due to ambient humidity. The estimated ambient pressure is used to correct or confirm pressure estimated by other sources, such as other pressure sensors or a pressure model, as well as to tune the performance of the engine.

公开(公告)号：US20170159614A1

公开(公告)日：2017-06-08

申请号：US14956784

申请日：2015-12-02

Applicant: Ford Global Technologies, LLC

Inventor： Dane Miller ,  Michael McQuillen ,  Gopichandra Surnilla ,  Richard E. Soltis ,  Mohannad Hakeem

IPC: F02M25/022 ,  F02D41/14 ,  F02P5/145 ,  F02M25/028

CPC classification number: F02M25/0227 ,  F02D19/0655 ,  F02D19/12 ,  F02D41/0025 ,  F02D41/123 ,  F02D41/144 ,  F02D41/1441 ,  F02D41/1454 ,  F02D41/2451 ,  F02D2200/0612 ,  F02M25/028 ,  F02M26/08 ,  F02P5/1455 ,  F02P5/152 ,  F02P5/1527 ,  Y02T10/36 ,  Y02T10/46

Abstract: Methods and systems are provided for accurately determining the composition of a knock control fluid using sensors already present in the engine system. An intake oxygen sensor is used to estimate the water and the alcohol content of a knock control fluid that is direct injected into an engine cylinder responsive to an indication of abnormal combustion. A change in the pumping current of the oxygen sensor due to the water content of the knock control fluid is distinguished from a change in the pumping current of the oxygen sensor due to the alcohol content of the knock control fluid, while compensating for interfering effects of intake air diluents on the change in pumping current.

公开(公告)号：US09611799B2

公开(公告)日：2017-04-04

申请号：US14626542

申请日：2015-02-19

Applicant: Ford Global Technologies, LLC

Inventor： Daniel A. Makled ,  Gopichandra Surnilla ,  Richard E. Soltis ,  Kenneth John Behr

IPC: F02D41/24 ,  F02D41/14

CPC classification number: F02D41/1454 ,  F02D41/1456 ,  F02D41/2474

Abstract: Methods and systems are provided for estimating an exhaust air/fuel ratio based on outputs from an exhaust oxygen sensor. In one example, a method may include adjusting engine operation based on an air-fuel ratio estimated based on an output of the exhaust oxygen sensor and a learned correction factor. For example, the oxygen sensor may operate in a variable voltage mode in which a reference voltage of the oxygen sensor may be adjusted between a lower first voltage and a higher second voltage, and the learned correction factor is based on the second voltage.

公开(公告)号：US20170082045A1

公开(公告)日：2017-03-23

申请号：US14863281

申请日：2015-09-23

Applicant: Ford Global Technologies, LLC

Inventor： Daniel A. Makled ,  Gopichandra Surnilla ,  Richard E. Soltis ,  Michael McQuillen ,  Mohannad Hakeem ,  Lyth Alobiedat

IPC: F02D41/00 ,  F02M35/10 ,  F02D41/26 ,  F02D35/00 ,  F02D41/24

CPC classification number: F02D41/021 ,  F02D35/00 ,  F02D35/0007 ,  F02D37/02 ,  F02D41/005 ,  F02D41/0077 ,  F02D41/1456 ,  F02D41/2406 ,  F02D41/26 ,  F02D2200/0418 ,  F02D2200/70 ,  F02M35/10393 ,  Y02T10/47

Abstract: Methods and systems are provided for triggering a humidity measurement based on changes in ambient conditions. In one example, a method may include, in response to a higher than threshold change in ambient air temperature or pressure, operating an oxygen sensor to update an ambient humidity estimate. Engine operation parameters may be adjusted based on the updated ambient humidity estimate.