Gm Global Technolgoy Operations, Inc.

Jeffrey M Kaiser

Christopher E Whitney

Michael Livshiz

Richard B Jess

Bahram Younessi

Robert Charles Simon, Jr

Leonard G Wozniak

Todd R Shupe

Gregory J York

Michael J Pitsch

Zhong Li

Anthony H Heap

Layne K Wiggins

Andrew W Baur

Scott Joseph Chynoweth

Timothy Karnjate

Dennis Allen Light

Pahngroc Oh

Richard H Clutz

John A Jacobs

Weixin Yan

Timothy L Gibbs

Wenbo Wang

William Leonard Aldrich, Iii

Donovan L Dibble

James L Worthing

Ning Jin

Daniel G Brennan

Mark D Carr

Timothy John Hartrey

Klaus Pochner

Eric B Ferch

Mark A Schang

Christopher R Graham

Jun Lu

Chao F Daniels

Per Andersson

Jon C Wasberg

Robert Francis Semrau

Michael L Waterman

Brian D Francis

William Conrad Albertson

William R Cawthorne

Vijay A Ramappan

Tang-Wei Kuo

David S Mathews

Mark Henry Costin

Lan Wang

Rafat F Hattar

Magnus Johansson

Joseph M Stempnik

Jon C Miller

Louis A Avallone

Douglas J Babcock

Vivek Mehta

B Jerry Song

Xiaofeng Yang

Bryan R Snyder

Craig Michael Sawdon

Cheryl A Williams

Alfred E Spitza, Jr

Kevin J Storch

Poh Fong Chin

James B Hicks

Michael L Kociba

Jinchun Peng

Jeremy V Horgan

Ronald W Van Diepen

Bruce A Rogers

Chengke Liu

Jaehak Jung

Sharon L Storch

Karl T Kiebel

Anne Marie Shields

Scott A Hearld

Timothy J Braman

Daniel J Wickman

Emil Ritzen

Michael S Emmorey

David A White

Kevin T Sharples

Gerald J Hysko, Jr

Richard M Backman

Honghao Tan

Katie C Bonasse

Timothy Ward Athan

Stefan Lindner

Thomas Magnusson

Magnus Wall

Henrik Nordin

Joseph Shelton

Mats A Reimark

An engine consumes fuel and air to generate an exhaust gas stream. An exhaust system channels the exhaust gas stream from the engine to a tailpipe. An aftertreatment system is included in the exhaust system and includes a catalyst. An exhaust throttle valve is disposed in the exhaust system downstream from the aftertreatment system. An actuator controls an amount of air pumped through the engine. A controller operates the exhaust throttle valve and/or the actuator to control emissions from the exhaust system during a cold start and following a deceleration fuel cutoff event.

Engine emission control systems for deceleration fuel cutoff events and cold starts

A method of controlling a transmission includes determining if an internal combustion engine of the vehicle is currently operating with active fuel management, or if the internal combustion engine is currently operating without active fuel management. The vehicle controller further determines if a possible engine torque is equal to, greater than, or less than a required engine torque. The transmission is upshifted when the internal combustion engine is currently operating with active fuel management, and when the possible engine torque is equal to or greater than the required engine torque. When the possible engine torque is less than the required engine torque, active fuel management is exited so that the internal combustion engine is currently operating without active fuel management. When the internal combustion engine is currently operating without active fuel management, the vehicle controller upshifts the transmission from the current gear ratio to the higher gear ratio.

Method of controlling an upshift of a transmission

A spark control module, for an engine speed and an engine load: for a first predetermined period, supplies spark to each cylinder of the engine at a predetermined spark timing set for the engine speed and the engine load. For a second period following the first predetermined period, the spark control module: provides spark to a first one of the cylinders at a first spark timing that is retarded relative to the predetermined spark timing; and supplies spark to all of the other cylinders of the engine at the predetermined spark timing. The storage module selectively stores in memory: a first torque output of the engine measured during the first predetermined period; and a second torque output of the engine measured during the second period.

Spark control systems and methods for engine torque estimation

An engine control system for a vehicle, includes a delay and rate limit module, a throttle control module, a phaser control module, and an exhaust gas recirculation (EGR) control module. The delay and rate limit module applies a delay and a rate limit to a first torque request to produce a second torque request. The throttle control module determines a target throttle opening based on the second torque request and selectively adjusts a throttle valve based on the target throttle opening. The phaser control module determines target intake and exhaust phasing values based on the second torque request and selectively adjusts intake and exhaust valve phasers based on the target intake and exhaust phasing values, respectively. The EGR control module determines a target EGR opening based on the first torque request and selectively adjusts an EGR valve based on the target EGR opening.

Airflow control systems and methods

A throttle control system includes a target pressure module, a torque determination module, and a target opening module. The target pressure module determines an induction noise value based on an engine operating parameter and determines a target pressure downstream of a throttle valve of an engine based on a pressure at an inlet of the throttle valve and the induction noise value. The torque determination module determines a torque request for the engine based on the target pressure. The target opening module determines a target opening for the throttle valve based on the torque request and selectively adjusts opening of the throttle valve based on the target opening.

Throttle control systems and methods for reducing induction noise

An engine control system according to the principles of the present disclosure includes a manifold air pressure (MAP) determination module, a boost control module, and a throttle control module. The MAP determination module determines a desired MAP based on a driver torque request. The boost control module controls a boost device based on the desired MAP and a basic boost pressure. The boost device is actuated using boost pressure and the boost pressure is insufficient to actuate the boost device when the boost pressure is less than the basic boost pressure. The throttle control module controls a throttle valve based on the desired MAP and the basic boost pressure.

Control system and method for coordinating throttle and boost

A control system for an engine includes a target air per cylinder (APC) module, a target area module, and a phaser scheduling module. The target APC module determines a target APC based on a target spark timing, a target intake cam phaser angle, and a target exhaust cam phaser angle. The target area module determines a target opening of a throttle valve of the engine based on the target spark timing, the target intake cam phaser angle, and the target exhaust cam phaser angle. The target area module controls the throttle valve based on the target opening. The phaser scheduling module determines the target intake and exhaust cam phaser angles based on the target APC. The phaser scheduling module controls intake and exhaust cam phasers of the engine based on the target intake and exhaust cam phaser angles, respectively.

Coordinated engine torque control

A torque estimation system for a vehicle comprises an operating parameter module, a torque estimation module, and an estimation control module. The operating parameter module determines an estimated engine operating parameter based on engine speed. The torque estimation module estimates engine torque based on the engine speed and the estimated engine operating parameter. The estimation control module provides a plurality of engine speeds to the operating parameter module and the torque estimation module to determine estimated engine torque as a function of engine speed.

Use of torque model at virtual engine conditions

A method includes: retarding spark timing relative to a predetermined spark timing when an engine torque output reduction is requested for a gear shift; estimating a first torque output of an engine based on N cylinders of the engine being fueled, an engine speed, an air per cylinder (APC), and the predetermined spark timing; estimating a second torque output of the engine based on M cylinders being fueled, the engine speed, the APC, and the spark timing. determining an initial pressure ratio across a turbocharger compressor; determining an adjustment based on M and the first and second torque outputs; generating a desired pressure ratio across the turbocharger compressor based on the adjustment and the initial pressure ratio; and controlling opening of a turbocharger wastegate based on the desired pressure ratio. N is a total number of cylinders of the engine and M is less than or equal to N.

Turbocharger boost control systems and methods for gear shifts

A control system for an engine includes a selecting module, a target air per cylinder (APC) module, and a phaser scheduling module. The selecting module: selects one of (a) target intake and exhaust cam phaser angles and (b) measured intake and exhaust cam phaser angles; and sets selected intake and exhaust cam phaser angles based on the selected one of the target intake and exhaust cam phaser angles and the measured intake and exhaust cam phaser angles, respectively. The target APC module determines a target APC based on a target spark timing and the selected intake and exhaust cam phaser angles. The phaser scheduling module determines the target intake and exhaust cam phaser angles based on the target APC and controls intake and exhaust cam phasers of the engine based on the target intake and exhaust cam phaser angles, respectively.

Coordinated torque control security systems and methods

A control system for use with an engine and a transmission in a vehicle is provided that includes at least one controller having a processor with at least one stored algorithm that determines different crankshaft torque capacities associated with different respective torque actuators including a relatively slow torque actuator, such as an airflow actuator, and at least one relatively fast torque actuator, such as a spark actuator or a fuel actuator. The algorithm determines a torque actuation range over which to modify engine torque during an oncoming shift of the transmission. The torque actuation range may be based at least partially on a target gear of the upshift, desired shift duration, and a vehicle operating condition indicative of an operator intent regarding shift duration. Requests for torque modification by use of the torque actuators are then made to provide the torque actuation range.

System and method of controlling crankshaft torque during a transmission shift with torque capacity-based torque reduction range selection

A control system for a vehicle, comprises a torque determination module, a control module, and a transmission control module. The torque determination module determines torque produced by an internal combustion engine. The control module sets a signal to an active state when the torque is greater than a predetermined torque and a slip amount between an engine output speed and a transmission input speed is zero. The predetermined torque corresponds to a potential vibration amount when the slip amount is zero. The transmission control module selectively increases the slip amount above zero in response to the setting of the signal to the active state.

Driveline stiffness control systems and methods

A lubrication torque limit module includes a temperature module that determines a temperature of an engine and generates an engine temperature signal. A limit module generates a torque limit signal based on the temperature signal and a speed of the engine. The torque limit signal identifies an indicated torque maximum limit. A torque arbitration module limits indicated torque of the engine based on the indicated torque maximum limit. The indicated torque of the engine is equal to an unmanaged brake torque of the engine plus an overall friction torque of the engine.

Torque limiting engine lubrication protection system

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 system includes a power request module, a first desired engine speed (DRPM) determination module, a driver torque request module, and an actuation module. The power request module generates a power request for an engine of the vehicle based on an accelerator pedal position and a vehicle speed. The first DRPM determination module determines a first target DRPM based on the power request, a turbine speed of a torque converter, and a k-factor of the torque converter. The driver torque request module selectively generates a torque request for the engine based on the power request and the first target DRPM. The actuation module controls at least one engine actuator based on the torque request.

Engine control systems and methods

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Highland, MI, United States of America

Jeffrey M Kaiser