Ford Motor Company Limited

Ford Global Technolgoies, LLC

Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg

Getrag Transmission Corporation

Bruce J Palansky

Thomas L Greene

John A Daubenmier

Lawrence H Buch

Michael John Cullen

Paul F Smith

Paul A Baltusis

Gavin F McCall

Kurt Howard Nickerson

Kenneth G Walega

Philip Joseph Wiethe

Allan S Leonard

Eileen A Schock

Earl R Hoffman

Richard R Hathaway

David M Garrett

Pamela J Eggers

Joseph Norman Ulrey

Bradley Dean Riedle

James Matthew Kindree

Richard Reynolds Hathaway

Charles William Suter

Dennis Allen Light

Richard John Hippley

Tobias Kalisch

Josef Glatthaar

Kenneth Paul Wozniak

Ken Sovel

Michelle S Grytzelius

Oliver Ottinger

Earl Roslin Hoffman

Steven M Lepi

Rocco Bellino

Karl H Kock

Stuart L Bird

Joe Ulakovich

Mahendra Patil

A system and method for maintaining the operation of an automated transmission (), particularly a dual dutch transmission, for a motor vehicle, in case of a failure of an engine speed sensor () or a bus connection () between a first control module () controlling an engine () being connectable to the transmission () through at least one separation clutch (), and a second control module () controlling regulating units () for connecting the engine () to the transmission () or to one or more driving wheels () in a force-transmitting manner, wherein gear-shift relevant data, particularly a number of revolutions (n) of the engine, is exchanged between the control modules () over the bus connection ().

System and method for operating a dual clutch transmission during failure of an engine speed sensor or a bus connection between control modules

A method for fabricating a motor vehicle including an engine and automatic transmission includes generating first data containing information representing a performance characteristic of a solenoid and a serialized solenoid number, affixing to the solenoid a first barcode matrix containing the first data, installing the solenoid and clutch in the transmission generating second data containing information representing a performance characteristic of clutch, using information from the first and second data to produce third data that includes a serialized transmission number and information from the first data and the second data, affixing to the transmission a third barcode matrix containing the third data, using information from the third barcode matrix to produce fourth data that is tied to a vehicle identification number and information from the first data, the second data and the third data, reading information from the fourth data into an electronic memory of a powertrain control module (PCM), and installing the PCM in the vehicle.

Providing component-specific performance characterization data for an assembly or subsystem

A method for controlling an automatic transmission in a vehicle is provided. The method selectively provides automatic engine braking for the vehicle. When it is determined that automatic engine braking is desired, the upshift schedule is increased, such that a higher vehicle speed is required to upshift for any given accelerator pedal position. The transmission is automatically downshifted to a lower gear to provide engine braking for the vehicle, when a vehicle acceleration threshold is exceeded. The automatic downshifting of the transmission can occur when the brake pedal is engaged, and when the brake pedal is disengaged.

System and method for controlling an automatic transmission in a vehicle

A system and method for controlling a multi-cylinder internal combustion engine include determining a currently available maximum torque, determining a driver demanded torque based on a current accelerator pedal position and reference ambient conditions, and controlling the engine to deliver the lesser of the driver demanded torque corresponding to the reference ambient conditions and a calibratable percentage of the currently available maximum torque corresponding to the current ambient conditions. A similar torque is provided at high altitudes as that provided at sea level for a given low pedal position while smoothly blending into the currently available peak torque.

Adjustment of driver demand for atmospheric conditions

A method and apparatus are provided to determine a failure of an automatic transmission temperature sensor in an automobile. The apparatus detects a start-up of the vehicle. A sensor detects the transmission fluid temperature. The transmission fluid temperature at start-up is checked to see if the temperature is below a first predetermined temperature or above a second predetermined temperature. If the sensor does not detect a predetermined change in temperature during operation of the vehicle after it is determined the transmission fluid temperature at start-up is above the first predetermined or below the second predetermined temperature, the sensor has failed.

Apparatus and method for determining a failure of an automatic

A diagnostic strategy for an automatic transmission having electronic shift control solenoids for controlling application and release of clutches and brakes during the establishment and disestablishment of torque ratios in multiple-ratio gearing for the transmission wherein provision is made for developing diagnostic data that detects failure modes due to a faulty shift solenoid by using predetermined failure modes stored in the RAM portion of a microprocessor and comparing those known failure modes to the actual performance of the shift solenoids.

Shift solenoid functional test strategy for an automatic transmission

A system and method for controlling the bypass clutch of an automatic transmission includes an electronic microprocessor, an electronic memory accessible to the microprocessor, solenoid-operated bypass valve, pressure actuated bypass clutche, a variable force solenoid-operated bypass valve, a torque converter bypass friction clutch, and control algorithms that produce output signals to control the state of the solenoid-operated valve. The vehicle speed at which the bypass clutch engages and disengages, according to a reference schedule, is compensated for loss of engine torque at conditions that differ from the conditions at which the reference schedule is defined. Vehicle speed is compensated for torque variation with reference to the ratio of current calculated engine torque divided by current engine output torque.

Automatic transmission torque converter bypass clutch control using

A multiple ratio automatic transmission having a hydrokinetic torque converter in an automotive vehicle driveline wherein the torque converter has a controllable bypass clutch and wherein provision is made for changing the clutch capacity during a ratio change to reduce undesirable torque fluctuations in the driveline, thus improving shift quality while maintaining optimum hydrodynamic torque converter efficiency.

Electronically controlled bypass clutch using target slips based on

A system and method for controlling gear ratio changes in an automatic transmission includes an electronic microprocessor, an electronic memory accessible to the microprocessor, solenoid-operated shift valves, pressure actuated friction clutches and brakes, a variable force solenoid-operated valve, a torque converter bypass friction clutch, and control algorithms that produce output signals to control the state of the solenoid-operated valves. The vehicle speed and engine speed at which upshifts and downshifts occur, according to a standard gear shift schedule, is compensated for loss of engine torque at conditions that differ from the conditions at which a reference shift schedule is defined. Vehicle speed is compensated for torque variation with reference to the ratio of current calculated engine torque divided by current engine output torque.

Engine torque compensation shift scheduling of an automatic transmission

An automatic transmission having multiple-ratio gearing, fluid pressure-operated clutches and brakes adapted to establish and to disestablish multiple torque ratios and electronic shift control solenoids that can be energized and de-energized under the control of an electronic microprocessor that senses transmission operating variables, and a control strategy inherent in the microprocessor that uses predetermined failure modes to perform functional testing on the shift solenoids without special hydraulic and electronic hardware for developing the diagnostic information that detects shift solenoid failures or malfunctions.

Automatic transmission control system having electronic shift

An electronically controlled multiply ratio transmission for an automotive vehicle powertrain having a hydrokinetic torque converter with a bypass clutch, solenoid operated shift valves under the control of an electronic microprocessor that receives signals from an output shaft speed sensor, an engine speed sensor, a driver controlled drive range selector position, an engine throttle position sensor, and other powertrain operating variables, the bypass clutch having a controlled slip characteristic.

Control system for controlling engagement of an automatic transmission

A system for scheduling gear ratio changes in an automatic transmission and controlling operation of a torque converter bypass clutch includes a microprocessor; electronic memory containing control algorithms, lookup tables, functions and constants; solenoid-operated shift valves, a variable force solenoid, friction clutches, brakes and sensors, and planetary gear units. A table of calibrated performance weighting factors (PWF) is used to alter reference schedules of gear ratio changes based on the extent to which high performance operation is desired rather than economy operation. The PWFs are used to adjust gear shift points based on inferences drawn from engine throttle position and time rate of change of throttle position. Hydraulic pressure supplied to the friction elements and the schedule of unlocked and modulated operation of the torque converter are adjusted from reference schedules and pressures on the basis of PWF values.

Performance mode and economy mode shift scheduling in an automatic

An electrically controlled multiple ratio transmission for an automotive vehicle powertrain having a hydrokinetic torque converter with a bypass clutch, solenoid operated shift valves under the control of an electronic microprocessor that receives signals from an output shaft speed sensor, an engine speed sensor, a driver controlled drive range selector position, an engine throttle position sensor, and other powertrain operating variables, the solenoid shift valves forming a part of a simplified control valve circuit having a minimum number of shift valve elements and simplified circuit pressure modifier elements for effecting optimum pressures in fluid pressure operated servos for the transmission clutches and brakes during ratio changes, the bypass clutch having a controlled slip characteristic.

Automatic transmission control system

Electronically controlled bypass clutch based on

A method of inferring and predicting engine torque uses a function of a speed/load table, air/fuel ratio and spark advance. The effects of the magnitudes of engine spark retard, rich or lean air/fuel ratios and exhaust gas recirculation are accounted for using a series of multipliers. Friction torque is accounted for through a speed/air charge table look-up.

Method and apparatus for inferring engine torque

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Livonia, MI, United States of America

Bruce J Palansky