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Gopichandra Surnilla, David George Farmer: Method and system for operating dual-exhaust engine. Ford Global Technologies, Julia Voutyras, Allan Lippa, October 22, 2002: US06467259 (40 worldwide citation)

An exhaust gas treatment system for an internal combustion engine includes a pair of upstream emission control devices which respectively receive the exhaust gas generated by a respective group of cylinders, and a single, shared downstream emission control device receiving catalyzed exhaust gas from ...


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David Sol, Ross M Stuntz: Road surface friction and hill slope estimator. Ford Motor Company, Allan Lippa, Roger May, July 21, 1992: US05132906 (35 worldwide citation)

A system and method for estimating hill slope and coefficient of friction for a road surface from vehicle and engine measurements. A first variable related to hill slope and a second variable related to road surface coefficient of friction are generated from the vehicle and engine measurements and m ...


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John D Russell: Method for detecting cooling system faults. Ford Global Technologies, Julia Voutyras, Allan Lippa, October 15, 2002: US06463892 (28 worldwide citation)

A method for diagnosing engine thermostat is presented. Indicated engine coolant temperature is estimated based on engine operating conditions, such as engine speed, net engine torque, air flow, fuel-air ratio, net engine torque, etc. This estimate is compared to the reading of the engine coolant te ...


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John L Bomback, Ronald C Elder, Shaun L McCarthy: Capacitance transducer article and method of fabrication. Ford Motor Company, Allan Lippa, Roger L May, June 7, 1994: US05317922 (26 worldwide citation)

A capacitance transducer has a first hermetically sealed cavity adapted to deform in response to an applied force, such as pressure or acceleration, and a second hermetically sealed cavity adapted to resist deformation in response to such applied force. The cavities are formed between two doped sili ...


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Donald J Lewis, John D Russell, John O Michelini: Cylinder deactivation for an internal combustion engine. Ford Global Technologies, Allan Lippa, Alleman Hall McCoy Russell & Tuttle, July 7, 2009: US07555896 (25 worldwide citation)

A system and method to control engine valve operation during periods of cylinder deactivation of an internal combustion engine. Electromechanical valves are controlled in a manner to reduce fuel consumption and emissions during cylinder deactivation periods of an internal combustion engine.


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Daniel V Orzel, Michele T Reichenbach, Timothy Joseph Clark, William Najib Mansur: NOx sensor monitoring. Ford Global Technologies, Julia Voutyras, Allan Lippa, September 24, 2002: US06453663 (22 worldwide citation)

A method for determining deterioration of an exhaust gas sensor coupled downstream of an emission control device by monitoring the sensor's response to a change in an air-fuel ratio is presented. In particular, the sensor is monitored for a predetermined time period following a switch from lean ...


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Gopichandra Surnilla: Method for controlling transitions between operating modes of an engine for rapid heating of an emission control device. Ford Global Technologies, Allan Lippa, March 22, 2005: US06868827 (21 worldwide citation)

A method is disclosed for controlling operation of an engine coupled to an exhaust treatment catalyst. Under predetermined conditions, the method operates an engine with a first group of cylinders combusting a lean air/fuel mixture and a second group of cylinders pumping air only (i.e., without fuel ...


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Devesh Upadhyay, Michael Goebelbecker, Michiel J van Nieuwstadt, William Charles Ruona: Diesel aftertreatment systems. Ford Global Technologies, Julia Voutyras, Allan Lippa, May 24, 2005: US06895747 (16 worldwide citation)

A method and a system for improving conversion efficiency of a urea-based SCR catalyst coupled downstream of a diesel or other lean burn engine is presented. The system includes an electrically heated vaporizer unit into which a mixture of reductant and air in injected. The mixture is vaporized in t ...


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Margherita Zanini Fisher, Michiel J van Nieuwstadt: System and method for performing a particulate sensor diagnostic. Ford Global Technologies, Allan Lippa, Alleman Hall McCoy Russell & Tuttle, October 9, 2007: US07278304 (15 worldwide citation)

An apparatus comprising an internal combustion engine, an exhaust system in communication with the engine, a particulate sensor associated with the exhaust system, and a controller in electrical communication with the particulate sensor, wherein the controller is configured to determine a change in ...