Ford Global Technolgoies, LLC

Patrick Edward Smithberger

Adam Krach

Sumanth Reddy Dadam

Edward Doemer

Sitaram Rejeti

Robert Roy Jentz

Dave Hagner

Michiel Jacques Van Nieuwstadt

Michael John Cullen

Rani Kiwan

Andrew Paul Bagnasco

Stephen Lee Cooper

Michael Casedy

Rommel Racelis

Robert Matthew Marzonie

Kirk Pulay

Scott Richard Hughes

Jose Francisco Martinez Leyva

Todd Leonard Rachel

Bill Courtney

Methods and systems are provided for EGR valve diagnostic. In one example, a method includes providing a correction to a position of the EGR valve to compensate for an altitude of the vehicle. The compensation is based on a comparison of a pressure ratio to a curve rationalized with a barometric pressure.

Methods and systems for EGR system

A vehicle includes an internal combustion engine having a plurality of cylinders, a sensor configured to generate a sensor signal correlated with an air-fuel ratio of first and second cylinders of the plurality of cylinders, and a controller in communication with the sensor and programmed to monitor the air-fuel ratio of the first cylinder in response to an indication that air-fuel ratio measurements of the first cylinder satisfy predetermined criteria for current engine operating conditions while air-fuel ratio measurements of the second cylinder do not satisfy the predetermined criteria for the current engine operating conditions.

Vehicle control with individual engine cylinder enablement for air-fuel ratio imbalance monitoring and detection

Systems and methods for determining whether or not a temperature sensor is degraded are presented. In one example, a determination of degradation of the temperature sensor is based on a difference between a temperature determined from output of the temperature sensor and an estimate of a temperature of a pressure sensor.

Method and system for rationalizing a temperature within an engine system

Methods and systems are provided for diagnostics of exhaust gas recirculation (EGR) components including an EGR pressure sensor. In one example, a method for an exhaust gas recirculation (EGR) system of a vehicle comprises diagnosing an excessive EGR flow rate via an MAP-MAF strategy, the MAP-MAF strategy including estimating an EGR flow rate based on a difference between an output of a manifold absolute pressure (MAP) sensor of the vehicle and an output of a mass airflow (MAF) sensor of the vehicle; and in response to stable intrusive conditions being met, intrusively commanding an EGR valve of the EGR system to a closed position to confirm the diagnosed excessive EGR flow rate. If the excessive flow is detected after the EGR valve is commanded to the closed position, a diagnostic code may be set.

Method for detecting excessive EGR flow

Methods and systems are provided for diagnostics of exhaust gas recirculation (EGR) components including an EGR pressure sensor. In one example, a method may include comparing a current relationship between an output of the EGR pressure sensor and a manifold air pressure (MAP) and a pre-calibrated relation between the output of the EGR pressure sensor and the MAP to detect degradation of the EGR pressure sensor.

EGR system diagnostics

Methods and systems are provided for a high-pressure exhaust gas recirculation system. In one example, the high-pressure exhaust gas recirculation system comprises pressure seconds arranged on different sides of a valve. The pressure sensors are used to regulate exhaust-gas recirculate flow without a fixed orifice delta pressure sensor.

Methods and systems for an exhaust gas recirculation system

Systems and methods for determining degradation of a cylinder deactivation mechanism are described. In one example, engine data generated while an engine is operation with all of its cylinders active is used to correct engine data generated while one or more engine cylinders are deactivated to improve detection of a degraded cylinder deactivation mechanism.

System and method for diagnosing cylinder deactivation

A method and system are provided for controlling a device in an internal combustion engine such as a spark plug, a camshaft actuator, an EGR valve actuator, etc. The method and system are designed to compensate for changes in environmental operating conditions of the engine not accounted for in control variable scheduling. A parameter value is determined responsive to one or more engine operating conditions (e.g., ambient temperature, engine oil temperature, etc.). Potential values for the parameter are divided into predetermined value ranges. A schedule of control values for the device is then selected from among a plurality of control value schedules for the device responsive to the parameter value. Each control value schedule in the plurality of control value schedules corresponds to one of the aforementioned value ranges for the parameter. The device is then controlled responsive to a control value obtained from the selected control value schedule.

System and method for transitioning between engine device schedules based on engine operating condition

A method (42) is disclosed for detecting the usage of a heater (31) in a block (30) of an internal combustion engine (11). The method (42) uses temperature measurements of the engine coolant and any ambient air used to create the air/fuel mixture. Based on the difference between the temperatures, the temperatures are weighted and added to create a temperature variable. The temperature variable is used by the electronic engine control module (34) to create an air/fuel mixture which will allow the internal combustion engine (11) to start smoothly. The method (42) operates on this modified temperature; i.e., the temperature variable, which is not the temperature of the engine coolant, nor the ambient air, and allows for the stoichiometric balance of the air/fuel mixture to be modified to optimize performance of the internal combustion engine (11) during a cold start in cold weather with warm engine coolant.

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Marine City, MI, United States of America

Patrick Edward Smithberger