Gm Global Technolgoy Operations, Inc.

Richard B Jess

Christopher E Whitney

Michael Livshiz

Jeffrey M Kaiser

Joseph M Stempnik

James L Worthing

Michael L Kociba

Bahram Younessi

Paul Alan Bauerle

Wenbo Wang

Mark Henry Costin

Timothy John Hartrey

Robert Charles Simon, Jr

Leonard G Wozniak

Vivek Mehta

Michael J Pitsch

David N Belton

Thomas Richard Durkin

John A Jacobs

Michael L Waterman

Chuan He

Julian R Verdejo

John F Van Gilder

Jeffrey A Sell

Andrew W Baur

Todd R Shupe

Ian J Macewen

Steven D Stiles

Jinchun Peng

Ryan Z Goode

Daniel G Bolstrum

Richard H Clutz

Jay Tolsma

Bryan D Lehman

Weixin Yan

Mark T Hutchinson

Igor Anilovich

Layne K Wiggins

Lan Wang

Ronald F Lochocki, Jr

Ning Jin

John W Siekkinen

Daniel P Grenn

Mark D Carr

Joseph R Dulzo

John Norman Stockbridge

Bryan K Pryor

James A Eng

Stuart R Smith

John E Marano

Robert J Genslak

Joseph E Ploucha

Mike M Mc Donald

William Robert Mayhew

Jeffrey M Hutmacher

Cheryl A Williams

Etsuko Muraji Stewart

Pahngroc Oh

Christopher R Graham

Ronald W Van Diepen

Bruce A Rogers

Michael A Turley

Christopher J Trush

Karl R Gilgenbach

Zhong Li

Chad W Lehner

Stephen K Fulcher

Bruce Alan Tucker

Vincent Holtz

Jeffry A Helmick

Onassis Matthews

Sharon L Storch

Michael S Emmorey

Stephen Lewis Pudvay

Pascal Tissot

Kevin T Sharples

Ronald C Allison

William Western

Lyle E Hamilton

GuoJun Shi

Patrick L Risse

Matthew J Roelle

Katie C Bonasse

Kouji Sakumoto

Tracey A Bagley-Reed

Sandra J Nelson

Michael J Svestka

Richard W Amann

James R Royer

Jose L DeLeon

Brian D Essenmacher

William G Howell

Kristian Keary

Chris R Thelen

Meera Raja

Roger A Madsen

Fang-Cheng J Fu

Christian G Masson

Mehta Vivek

John Douglas Tursell

A vehicle and a method of reducing sound produced by a liquid fluid pump are disclosed. A pump is activated when a predetermined event is detected. A control valve of the pump is operated in one of an initial and a standard mode when the pump is activated. The control valve is operable to allow a gaseous fluid to vent out of the pump when in the initial mode corresponding to the pump being in a first phase. The control valve is operable to allow a liquid fluid to move through the pump when in the standard mode corresponding to the pump being in a second phase. A solenoid of the control valve is energized and de-energized, at a calibrated frequency, in a sequence when in the initial mode to reduce the sound in the pump during the initial mode.

Vehicle and a method of reducing sound produced by a liquid fluid pump

An engine control system for a vehicle comprises a torque module and a drag request evaluation module. The torque module controls torque output of an engine based on a driver torque request and increases the torque output based on a wheel drag torque request generated based on a driven wheel speed. The drag request evaluation module disables the increase of the torque output when the driven wheel speed is greater than an undriven wheel speed by more than a predetermined speed.

Drag torque request security diagnostic systems and methods

A system according to the principles of the present disclosure includes an axle torque determination module, an engine torque determination module, a torque security module, and an engine torque control module. The axle torque determination module determines an axle torque request based on a driver input and a vehicle speed. The engine torque determination module determines an engine torque request based on the axle torque request and at least one of a first turbine speed and whether a clutch of a torque converter is applied. The torque security module determines a secured torque request based on at least one of the driver input, the vehicle speed, and an engine speed. The engine torque control module controls an amount of torque produced by an engine based on one of the engine torque request and the secured torque request.

System and method for controlling the amount of torque provided to wheels of a vehicle to prevent unintended acceleration

A system according to the principles of the present disclosure includes an axle torque determination module, an engine torque determination module, and an engine torque control module. The axle torque determination module determines an axle torque request based on a driver input and a vehicle speed. The engine torque determination module determines an engine torque request based on the axle torque request and at least one of a turbine speed and whether a clutch of a torque converter is applied. The engine torque control module controls an amount of torque produced by an engine based on the engine torque request.

System and method for controlling the amount of torque provided to wheels of a vehicle to improve drivability

A system for a vehicle includes a desired mass air flowrate (MAF) module and a desired effective area module. The desired MAF module generates a desired MAF through a throttle valve of an engine based on an engine torque request. The desired effective area module generates a desired effective area of the throttle valve based on a throttle inlet air pressure (TIAP) and the desired MAF. A throttle actuator module adjusts opening of the throttle valve based on the desired effective area.

Pre-throttle pressure control systems and methods

A control system for a vehicle includes a communication module and a vehicle stop module. The communication module receives a command from a vehicle services provider (VSP) to decrease a speed of the vehicle to a desired speed, wherein the VSP is located remotely with respect to the vehicle. In response to the received command, the vehicle stop module decreases the speed of the vehicle to the desired speed by controlling at least one of a transmission, an electronic parking brake, and electronically assisted brakes.

System and method for decreasing vehicle speed from a remote location

A control system includes a shift detection module, a request generation module, and a request setting module. The shift detection module detects when a transmission is executing a shift. The request generation module generates a transmission torque request to cause an engine to increase a transmission input shaft speed to a desired speed at a desired gear ratio when the transmission is executing the shift. The request setting module selectively sets the transmission torque request equal to a default torque request when the transmission torque request is greater than a first torque and the engine is coupled to a drive wheel.

Torque control system and method for shift assist

A control system for an engine includes an engine torque request module, an engine torque response module, a torque command limit module, and an actuation module. The engine torque request module determines an engine torque request based on (i) an engine power request and (ii) a desired engine speed (DRPM). The engine torque response module determines first and second torque values based on (i) an engine torque response model and (ii) first and second torque boundaries, wherein the first and second torque boundaries are based on the DRPM and a measured engine speed (RPM). The torque command limit module generates a secured engine torque request based on (i) the engine torque request and (ii) the first and second torque values. The actuation module controls at least one actuator of the engine based on the secured engine torque request.

System and method for securing engine torque requests

A method of controlling torque on a vehicle wheel axle includes comparing a torque intervention request to a predetermined minimum axle torque for a current vehicle speed and a current direction of motion of the vehicle. The predetermined minimum axle torque decreases as vehicle speed in an operator-selected direction of motion increases. An arbitrated axle torque is calculated based on an operator-requested torque, the current vehicle speed, the current direction of motion, and the greater of the torque intervention request and the predetermined minimum torque. Axle torque is applied to the vehicle's wheel axle based at least partially on the arbitrated axle torque.

Method of controlling vehicle wheel axle torque and control system for same

A method of operating an engine of a vehicle includes generating a first torque request. The method includes generating a second torque request that is greater than and based on the first torque request, increasing a torque output of the engine based on the second torque request at a first rate and during a first period, and increasing the torque output of the engine based on the first torque request at a second rate and during a second period. The first period is distinct from and before the second period, and the first rate is greater than the second rate.

Linear tranformation engine torque control systems and methods for increasing torque requests

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

A hybrid powertrain and a method of controlling a throttle in an engine of the hybrid powertrain are provided. A throttle system has a throttle at an optimal position for the engine to power a first motor/generator when an electric throttle motor is de-energized to minimize current consumption by the throttle motor. The electric throttle motor is energizable to adjust the position of the throttle. A biasing member biases the throttle to a default position when the electric throttle motor is not energized. The hybrid powertrain has a first motor/generator operatively connected to the engine, and a second motor/generator operatively connected to the generator and operable for providing output power. The engine is operable in a predetermined optimal state to provide power to the generator for powering the first motor/generator. The throttle is at a predetermined position when the engine is in the predetermined optimal state.

Hybrid powertrain with electronic throttle and method of controlling throttle position

An engine control system of a vehicle comprises a reserves module and a fault diagnostic module. The reserves module controls airflow into an engine based on a driver torque request, increases the airflow into the engine when a reserve torque request is received, and outputs a torque output command for the engine based on the driver torque request. The fault diagnostic module selectively diagnoses a fault in the reserves module when the torque output command is greater than a sum of the driver torque request, a predetermined torque, and a load applied to the engine.

Engine torque reserve system diagnostic systems and methods

An engine control system comprises a derivative module and a slip remediation module. The derivative module determines a mathematical derivative of a driven wheel speed of a vehicle. The slip remediation module, when the mathematical derivative is more negative than a predetermined deceleration, at least one of disables regenerative braking being performed by one or more electric motors, increases an axle torque request, and unlocks a torque converter.

Negative wheel slip control systems and methods

A control module includes a predicted torque control module that determines a desired throttle area based on a transmission torque request and a desired predicted torque. A throttle security module determines a throttle limit based on the desired throttle area and the desired predicted torque and determines an adjusted desired throttle area based on the throttle limit. A throttle actuator module adjusts a throttle based on the adjusted desired throttle area.

ECM security strategy for rationalizing and controlling increasing transmission torque requests above driver command

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Haslett, MI, United States of America

Richard B Jess