Gm Global Technolgoy Operations, Inc.

Wenbo Wang

Kurt D McLain

John F Van Gilder

Michael J Lucido

Zhong Wang

Kurt D Mc Lain

Lan Wang

Layne K Wiggins

Jon C Miller

Richard B Jess

Wajdi B Hamama

Robert J Genslak

Michael A Kropinski

David N Belton

Mark D Carr

Vincent A White

Ian J Macewen

Jeffrey M Kaiser

Igor Anilovich

Daniel P Grenn

Jian Lin

Krishnendu Kar

William R Cadman

Christopher R Graham

Ian J Mac Ewen

Robert J Horner

Edward Stuteville

Hamid M Esfahan

Chao F Daniels

Gary L Rogers

Scott A Kegebein

Yong Xu

Matthew J Roelle

Tang-Wei Kuo

Chuan He

James L Worthing

Louis A Avallone

Tony T Hoang

Jeffrey M Hutmacher

Gregory J York

John L Lahti

Michael R Grimes

Xiaofeng Yang

Craig Michael Sawdon

Eric B Ferch

Alfred E Spitza, Jr

Robert W Jackson

Anthony L Marks

Daryl A Wilson

Jinchun Peng

Daniel G Bolstrum

Jay Tolsma

Leon O Cribbins

David A Frank

Jaehak Jung

Douglas J Moening

Margaret C Richards

Richard H Clutz

Wesley W Wald

J Michael Ellenberger

Dale W McKim

Timothy J Braman

Junhong Dai

Matthew Squire

William Western

Lyle E Hamilton

GuoJun Shi

Antonio E Bartolomeo

Paul William Rasmussen

Mahendra M Kenkre

Rezina S Nabi

Christopher A Gillanders

Keith M Lindsey, Jr

Debbie L Makowske

Richard W Amann

Kevin A Sherwin

Matthew M Manning

Gary M Insana

Jill A Slimmer-Velez

Michael Kappaz

Yan Wang

David R Kosmalski

Chris R Thelen

Fang-Cheng J Fu

Thomas C Pelton

Robert D Wagner

A fault diagnostic system of a vehicle includes a noise module that determines a noise value based on a plurality of differences between samples of a pressure signal generated by a pressure sensor located in a positive crankcase ventilation (PCV) system of an engine. A signal module determines a signal value based on the samples of the pressure signal generated by the pressure sensor located in the PCV system of the engine. A diagnostic value module determines a diagnostic value based on one of: (i) a product of the noise value and the signal value; and (ii) a sum based on the noise value and the signal value. A fault module selectively diagnoses a fault in the PCV system based on the diagnostic value and generates a malfunction indicator within a passenger cabin of the vehicle in response to the diagnosis of the fault in the PCV system.

Positive crankcase ventilation system diagnostic systems and methods

A cruise control system includes an input device that generates an operator input signal. A control module generates a cruise control command signal to maintain a vehicle speed at a set target speed. The control module operates in a normal mode that is associated with decreasing the set target speed, based on the operator input signal, when the vehicle speed is within a window about the set target speed. The control module overrides the normal mode and enables reset of the set target speed to a current vehicle speed, which is based on the operator input signal, when the vehicle operator input signal is greater than the cruise control command signal.

Cruise control interaction with driver commanded speed reset

A system for an engine includes an edge detection module and a correlation calibration module. The edge detection module (i) detects edges of a camshaft of the engine using a camshaft position sensor, and (ii) detects edges of a crankshaft of the engine using a crankshaft position sensor. The correlation calibration module calibrates a correlation between the crankshaft and the camshaft based on the detected edges of the crankshaft and the camshaft, respectively.

System and method for calibrating engine crankshaft-camshaft correlation and for improved vehicle limp-home mode

A method of maintaining a substantially stable engine speed after a garage shift of an automatic transmission includes identifying a moment when a load from the automatic transmission is applied to an engine via a torque converter during the garage shift based on a first turbine speed change with respect to a reference engine speed change and a second turbine speed change with respect to an actual engine speed change. The method further includes generating a feed forward torque command based on a turbine speed decrement after identifying the moment when the load from the automatic transmission is applied to the engine, and controlling the engine based on the feed forward torque command to maintain a substantially stable engine speed after the garage shift.

Systems and methods for maintaining a substantially stable engine idle speed after a garage shift

An adaptive engine speed control system includes an idle condition module that determines whether the engine is idling and determines whether an actual engine speed is different than a desired engine speed. The desired engine speed corresponds to a commanded engine speed. A torque reserve determination module adjusts at least one of a torque reserve and the desired engine speed based on the determination of whether the engine is idling and the determination that the actual engine speed differs from the desired engine speed. The torque reserve corresponds to a quantity of torque reserved to respond to an anticipated future load on the engine.

Adaptive engine speed control to prevent engine from roll and stall

An exhaust control system for a vehicle comprises an exhaust system modeling module and an actuator control module. The exhaust system modeling module estimates an input gas temperature, an output gas temperature, a mass temperature, and a pressure for an exhaust system component of an exhaust system implemented in the vehicle. Exhaust gas flows through the exhaust system component. The actuator control module selectively adjusts an engine operating parameter based on at least one of the input gas temperature, the output gas temperature, the mass temperature, and the pressure.

Exhaust temperature and pressure modeling systems and methods

Methods and systems for dynamically estimating the core temperature of at least one cell in a battery. In one aspect, the method includes using a combination of estimations including one based on ohmic resistance and another based on a function of thermal energy transfer through the battery. A weighting factor may be used for each of the estimations as a way to calculating a core temperature. The estimation based on ohmic resistance may be made determined independently of a measured surface temperature of the battery or any of the cells in the battery.

Onboard adaptive battery core temperature estimation

A method and control module for determining a sensor error includes a time-based diagnostic module generating a time-based diagnostic for a sensor and an event-based diagnostic module generating an event-based diagnostic for the sensor. A synchronizing module synchronizes the time-based diagnostic and the event-based diagnostic to obtain a diagnostic result. A fault indicator module generates a fault signal in response to the diagnostic result.

Control system and method for sensor signal out of range detection

An outside air temperature (OAT) diagnostic system includes an ambient temperature monitoring module that receives (i) an OAT signal from an OAT sensor and (ii) an intake air temperature (IAT) signal from an IAT sensor of an engine. The ambient temperature monitoring module compares the OAT signal to an IAT signal and generates a first difference signal. A performance reporting module determines whether the OAT sensor is exhibiting a fault and generates an OAT performance signal based on the first difference signal.

Outside air temperature sensor diagnostic systems for a vehicle

A method for operating a spark-ignition internal combustion engine includes controlling spark ignition timing responsive to a combustion charge flame speed corresponding to an engine operating point and a commanded air/fuel ratio associated with an operator torque request.

Method and apparatus for controlling spark timing in an internal combustion engine

A fuel system diagnostic wakeup system for a vehicle includes a first control module. The first control module generates a wakeup request, powers off when the vehicle powers off, and powers on and performs a fuel system diagnostic in response to a wakeup signal while the vehicle is powered off. A second control module independent of the first control module receives the wakeup request and generates the wakeup signal after the vehicle powers off based on the wakeup request.

Method and apparatus for engine control module wake-up test

A control system and method of controlling operation of an internal combustion engine includes a load determination module that determines an engine load, an equivalence ratio module that determines an equivalence ratio, a correction factor module that generates a correction factor based on the engine load, the equivalence ratio, and the engine speed and an engine operation module that regulates operation of the engine based on the correction factor.

Method and apparatus for operating an engine using an equivalence ratio compensation factor

A method of determining an engine intake air leak may include measuring an air flow rate into an internal combustion engine, comparing the measured air flow rate to a first predetermined air flow limit, calculating an estimated air flow rate into the engine when the measured air flow rate is less than the first predetermined air flow limit, comparing the estimated air flow rate to second and third predetermined air flow limits, and indicating an air leak when the estimated air flow rate is greater than the second predetermined air flow limit and less than the third predetermined air flow limit.

Detection of engine intake manifold air-leaks

A diesel oxidation catalyst (DOC) testing system includes a DOC that is located in an exhaust system of a vehicle. A control module verifies proper operation of the DOC during a post-fuel injection process in an engine of the vehicle. The control module computes a predicted temperature of exhaust gases at an output of the DOC that corresponds with proper operation of the DOC during the post-fuel injection process, determines an actual temperature of the exhaust gases during the post-fuel injection process, and activates an alarm indicator when a difference between the predicted temperature and the actual temperature is greater than a first predetermined value. A first temperature sensor is located downstream from the DOC in the exhaust system. The first temperature sensor communicates with the control module, generates the actual temperature, and transmits the actual temperature to the control module.

Diesel oxidation catalyst efficiency diagnostic method

An engine control system comprises a signal deviation module, a variation determination module, and a sensor diagnostic module. The signal deviation module receives a signal from a sensor monitoring an operating condition of an engine and determines a plurality of signal deviations. Each of the plurality of signal deviations is based on a magnitude of a difference between the signal at a first time and the signal at a second time. The second time is different than the first time. The variation determination module generates a variation value based on the plurality of signal deviations during a period. The sensor diagnostic module determines a state of the sensor based on the variation value.

Intermittent sensor detection using signal string length

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Novi, MI, United States of America

Wenbo Wang