Ford Global Technolgoies, LLC

Xiaoyong Wang

Ming Lang Kuang

Rajit Johri

Mark Steven Yamazaki

Wei Liang

Ryan Abraham McGee

Jeffrey Allen Doering

Jason Meyer

Felix Nedorezov

Francis Thomas Connolly

Alexander O'Connor Gibson

Scott James Thompson

Daniel Scott Colvin

Walter Joseph Ortmann

Yanan Zhao

Chen Zhang

Matthew John Shelton

Bernard D Nefcy

Qing Wang

Dennis C Reed

Kenneth James Miller

David Oshinsky

Adam Nathan Banker

Kevin Ruybal

Robert Wright

Fazal Urrahman Syed

Dale Scott Crombez

Hong Jiang

Ihab S Soliman

Hai Yu

Zhengyu Dai

Michael Glenn Fodor

James William Loch McCallum

Anthony Mark Phillips

Christopher John Teslak

David Farrell

Stan L Bower

Bradley Dean Riedle

Marvin Paul Kraska

Daniel A Makled

Jonathan Andrew Butcher

Brandon R Masterson

Christopher Alan Lear

Wei Wu

Todd Mccullough

Joseph Gerald Supina

Kenneth Frederick

Floyd Cadwell

Seunghoon Lee

Yu Liu

Thomas Chrostowski

David H Schmitt

Ameya Vivek Gadre

Derek Taylor

Jeffrey Edwin Knutson

A vehicle includes an engine, an electric machine, a battery, and at least one controller. The vehicle may further comprise a port for supplying power to a load external to the vehicle. The controller is programmed to operate the engine at a power level based on a difference between a battery voltage and a reference voltage such that a power output by the electric machine reduces the difference. The power level may define an engine operating point that minimizes fuel consumption. The operating point may be an engine torque and an engine speed. The power level may be further based on a state of charge of the battery. The electric machine may be operated to cause the engine to rotate at an engine speed corresponding to the selected power level. The difference may be caused by varying power drawn by a load external to the vehicle.

Hybrid-electric vehicle plug-out mode energy management

Methods and systems are provided for improving engine restart operations occurring during a transmission shift in a hybrid vehicle. Engine speed is controller during cranking and run-up to approach a transmission input shaft speed that is based on the future gear of the transmission shift. Engine speed is controlled via adjustments to spark, throttle, and/or fuel, to expedite engine speed reaching the synchronous speed.

Methods and systems for starting an engine

Methods and systems are provided for operating a driveline of a hybrid vehicle that includes an internal combustion engine, an electric machine, an integrated starter/generator, and a transmission are described. In one example, transmission output torque and electric machine torque are adjusted while a brake pedal and accelerator pedal are contemporaneously applied.

Methods and system for operating a hybrid vehicle

Methods and systems are provided for operating a driveline of a hybrid vehicle that includes an internal combustion engine, an electric machine, and a transmission are described. In one example, accelerator pedal position provides a basis for requesting vehicle acceleration and vehicle wheel torque is determined from the requested vehicle acceleration.

Methods and system for determining driver demand

Systems and methods for improving operation of a driveline disconnect clutch for a hybrid vehicle shifting are presented. In one example, pressure of a working fluid supplied to the driveline disconnect clutch is adjusted in response to a rate of change in accelerator pedal position. Further, pressure of the working fluid may be decreased responsive to selected operating conditions.

Methods and system for applying a driveline disconnect clutch

Methods and systems are provided for operating a driveline of a hybrid vehicle that includes an internal combustion engine, a rear drive unit electric machine, an integrated starter/generator, and a transmission are described. In one example, inertia torque compensation is provided to counter inertia torque during a power-on upshift.

Methods and system for improving hybrid vehicle transmission gear shifting

Methods and systems are provided for operating a driveline of a hybrid vehicle that includes an internal combustion engine, an electric machine, and a transmission are described. In one example, the engine is started and coupled to the driveline via closing a clutch of a dual clutch transmission. Speed of the engine and clutch pressure are controlled to reduce driveline torque disturbances and provide a desired wheel torque.

Methods and systems for a hybrid vehicle

Methods and systems are provided for operating a hybrid vehicle during operating conditions where vehicle braking is requested. In one example, regenerative braking is allocated to vehicle wheels responsive to actual and estimated vehicle yaw. Additionally, friction braking torque is allocated to vehicle wheels responsive to requested braking torque and regenerative braking torques.

Regenerative vehicle braking with wheel slip control and yaw stability control

A vehicle includes a step-ratio automatic transmission having clutches engageable to provide forward and reverse gears, an electric machine selectively coupled to the transmission, a main pump powered by the electric machine and supplying oil to actuate selected transmission clutches, a gear selector configured for selecting a transmission gear, and a controller configured to stop the electric machine when the gear selector selects park or neutral, to operate the electric machine in a speed control mode using a higher controller gain in response to the gear selector selecting forward or reverse while the electric machine is stopped until the electric machine and the main pump reach a first speed threshold to reduce engagement delay of at least one of the transmission clutches, and to operate the electric machine using a lower controller gain when the electric machine and the main pump exceed the first speed threshold.

Hybrid/electric vehicle motor control during step-ratio transmission engagement

Systems and methods for operating a hybrid powertrain of a vehicle that includes an engine and a motor/generator are described. The systems and methods may judge whether or not to generate an engine start request when an engine is stopped in response to present vehicle operating conditions and predicted vehicle operating conditions.

Methods and system for controlling engine starting

In at least one embodiment, a vehicle powertrain includes an engine and an electric machine mechanically coupled by a clutch. The powertrain also includes a torque converter configured to fluidly couple the electric machine to an output shaft. A controller is programmed to command a rotational speed output of the electric machine to the torque converter based on a predicted torque delivered across the clutch. The controller is further programmed to modify the command based on a difference between the commanded rotational speed output and an actual rotational speed output of the electric machine.

Hybrid powertrain speed control

A stop/start vehicle includes at least one controller that, in response to predicting a vehicle stop, initiates an engine pre-shutdown protocol such that vehicle subsystems begin to prepare for engine shutdown prior to a speed of the vehicle reaching approximately zero to reduce time between the speed of the vehicle reaching approximately zero and engine shutdown.

Initiating preparations for engine autostop prior to vehicle stop

Methods and systems are provided for controlling clutch capacity in a hybrid electric vehicle. In one example, a method includes adjusting values of a transfer function of a clutch of a dual clutch transmission in response to an operating condition of an engine and/or operating condition of an integrated starter/generator coupled to the engine while a vehicle is propelled via an electric machine coupled to the dual clutch transmission, and maintaining a driver demand wheel torque at vehicle wheels via adjusting torque of the electric machine in response to the operating condition of the engine and/or operating condition of the integrated starter generator. In this way the method may apply pressure to one of the clutches where engine speed is independently controlled to maintain positive or negative slip, thus enabling adaptation of positive and negative clutch transfer functions, which may improve driveline operation and shift quality.

Methods and systems for adapting clutches of a vehicle transmission

A hybrid electric power-split vehicle, equipped with a continuously variable transmission coupling an electric motor/generator (EM) with a combustion engine (CE), includes systems and methods that reduce possible resonant noise and vibration during CE startup, by improved EM control, to generate compensating EM torque to counter act such possible resonant noise and vibration. The systems and methods include predetermined baseline CE operating condition (OC) cranking torque profiles stored as OC grids (SOCGs). A start profile is generated from selected cranking torque SOCGs, and also from selected historical start OCGs (HOCGs) of prior engine and/or CE starts, which include prior start noise and vibration metrics along with prior start OCs and related parameters. The start profile is calibrated using a blend factor that is generated from comparisons of SOCGs, and utilized to generate a feed-forward torque signal that adjusts EM torque to reduce the startup noise and vibration resonances.

HEV engine start vibration reduction system

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Novi, MI, United States of America

Xiaoyong Wang