Ford Global Technolgoies, LLC

Other

Stuart N Ford

Todd Mccullough

Bernard D Nefcy

Hong Jiang

Alexander O'Connor Gibson

Zhengyu Dai

Adam Nathan Banker

Yanan Zhao

Weitian Chen

Qi Wang

Ming Lang Kuang

Bradley Dean Riedle

Felix Nedorezov

Matthew John Shelton

Corey James Blue

Yang Xu

Jeffrey Allen Doering

Ralph Wayne Cunningham

Jason Meyer

Gregory Michael Pietron

Yuji Fujii

Walter Joseph Ortmann

Joseph F Kucharski

Amey Y Karnik

Scott James Thompson

James William Loch McCallum

Christopher John Teslak

Akshay Bichkar

John Erik Mikael Hellstrom

Minku Lee

Mark Davison

Judhajit Roy

Brandon Michael Dawson

Scott Joseph Gittins

Brian Thomas Soo

Rohit Hippalgaonkar

Chenliu Stephen Lu

Girish Gokul Chennupalli

Matthew Joseph Meinhart

Ankit Saini

Qingyu Zhang

A method for controlling a vehicle transmission system having a clutch system includes generating a torque-pressure (T-P) gain deviation based on a T-F characteristic and a nominal T-F characteristic for the clutch system, generating a pressure magnitude deviation based on the set of pressure values and the set of nominal pressure values, determining whether a T-F characteristic deviates from the nominal T-F characteristic based on the T-P gain deviation and the pressure magnitude deviation, identifying the T-F characteristic as deviating in response to the T-F characteristic departing from the nominal transfer characteristic, and issuing a notification regarding the deviating T-F characteristic to perform a corrective action related to the clutch system.

Method and system for a vehicle clutch performance detection system using clutch torque and clutch pressure

Methods and systems are provided for adjusting noise, vibration, and harshness (NVH) limits for a vehicle based on an occupancy level of the vehicle. The occupancy level is inferred based on a number of occupants and their position within a vehicle, and further based on a degree of interaction of a primary occupant with vehicle controls. As the occupancy level decreases, NVH constraints for operating the vehicle are reduced and one or more vehicle operating parameters nay be based on the reduced NVH constraints.

Methods and systems for NVH-based vehicle powertrain control

A method and system for operating a vehicle that includes an automatic transmission with a torque converter clutch is described. In one example, the method includes predicting a time that the torque converter clutch will open so that stopping rotation of the engine may be requested before the torque converter clutch is opened. The stopping rotation of the engine is requested to conserve fuel.

Methods and system for stopping an engine of a hybrid vehicle

Systems and methods for operating a driveline of a hybrid vehicle are disclosed. In one example, output of an electric machine is adjusted after commanding reactivation of all engine cylinder valves that have been deactivated. The electric machine torque may counteract the engine producing torque that is greater than a requested torque due to high intake manifold pressure.

Methods and system for reactivating engine cylinders

Systems and methods for operating a driveline of a vehicle that includes an automatic transmission and a torque converter are described. In one example, vehicle launch is controlled according to a linear quadratic regulator that provides feedback control according to torque converter slip error and vehicle speed error. The vehicle launch is also controlled according to feed forward control that is based on requested torque converter slip and requested vehicle speed.

Methods and system for controlling launch of a vehicle having an automatic transmission

Methods and systems are provided for reduction of VDE harmonics and improvement in the phase alignment of powertrain sensor signals that are asynchronously tasked. In one example, torque converter slip control is improved in a variable displacement engine by processing a raw torque converter turbine speed signal with a moving average filtered engine speed signal. By determining an actual delay between the sampled signals and adjusting a downstream filter parameter, a desired delay can be provided between the samples to align the phases and reduce the signal harmonics.

Method and system for variable displacement engine

Systems and methods for operating a hybrid powertrain that includes an engine and a motor/generator are described. The systems and methods provide a way of prepositioning an engine to improve a range of driveline disconnect clutch transfer function adaptation. In one example, an engine is positioned at a location where its torque to turn exceeds a threshold torque.

Methods and system for adapting operation of a driveline disconnect clutch

A method of operating a vehicle includes, responsive to a command to launch the vehicle and while the vehicle is in a first gear, determining, at a controller, a feedforward component including a target engine torque and a target bypass clutch torque, and a feedback component that is based on an error between the target converter slip and a measured converter slip and between the target wheel torque and a measured wheel torque. The method further includes changing a commanded engine torque and a commanded bypass clutch torque based on the feedforward component and the feedback component.

Engine torque and torque converter bypass clutch slip control during vehicle launch

Systems and methods for operating a driveline of a hybrid vehicle are presented. In one example, the systems and methods determine a driveline disconnect boost time during vehicle operating conditions when it may be less noticeable. The driveline disconnect boost time may then be used to close a driveline disconnect clutch in a way that may reduce torque disturbances through the driveline.

Operating methods and system for a driveline disconnect clutch

A vehicle includes a disconnect clutch selectively coupling an engine and an electric machine. The vehicle further includes a mechanical pump driven by the electric machine and operable to pressurize fluid for the clutch. The vehicle includes a controller programmed to, in response to the electric machine being inoperable, activate an auxiliary starter to start the engine, activate an electric pump operable to pressurize fluid to the clutch, and operate the engine to drive the mechanical pump.

System and method for starting a hybrid powertrain for a vehicle

Powertrains may include a spring damper between the engine crankshaft and transmission input shaft. In some circumstances, an oscillation known as shuffle may occur in such powertrains. Active adjustment of engine torque is substantially more effective at mitigating shuffle oscillations if the engine torque includes a p-term proportional to displacement of the damper spring in addition to a d-term proportional to the speed difference across the damper. For various reasons, the spring displacement is difficult to measure directly. An observer algorithm is utilized to calculate a current estimated spring displacement based on a crankshaft speed sensor, a transmission input speed sensor, a wheel speed sensor, and past engine torques, using a dynamic model of the powertrain.

Powertrain with anti-shuffle control

A vehicle includes a transmission and a controller. The transmission has clutches that are configured to establish multiple speed ratios, including a first clutch. The first clutch has a measured drag torque distribution. The measured drag torque distribution has a median and a standard deviation. The controller is programmed to increase a pressure at a rate to engage the first clutch and to increase the rate in response to a measured first clutch torque exceeding the median by a predetermined multiple of the standard deviation.

Vehicle transmission clutch engagement control system

A vehicle includes a powertrain and a controller. The powertrain includes a transmission torque converter having a bypass clutch disposed between an electric machine and a drive wheel. The controller is programmed to adjust a closed-state torque capacity of the bypass clutch according and in proportion to the greater in absolute value of a negative impeller torque command to the torque converter and a negative regenerative braking torque request.

Hybrid vehicle clutch control system

A vehicle comprises a hybrid powertrain includes an electric machine coupled between an automatic gearbox and an engine. The vehicle includes paddle shifters configured to output a driver requested gear change. The hybrid powertrain is configured to selectively operate in an economy mode that optimizes fuel economy. While operating in the economy mode, a controller may selectively inhibit the driver requested gear change when the change may negatively impact fuel economy. In the economy mode, the driver requested gear change may be inhibited during a demand for braking. If the driver requested gear change is a downshift request, the downshift is inhibited and simulated using electric machine torque.

Paddle shifter control of hybrid powertrain

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Seattle, WA, United States of America

Stuart N Ford