Detroit Diesel Corporation

Jeffery Scott Hawkins

Richard Michael Avery, Jr

Ian Daniel McKenzie

Curtis Paul Ritter

Steve M Weisman

Charles Chapin Blake

Min Sun

Matthew Thomas Baird

Mark Allen Zurawski

Frank S Groer

Craig L Savonen

Harald Wedler

David P Tasky

Heather A Staley

Steven M Weisman

Reinhard Pfundt

Dennis J Grace

Stanley P Miller

Richard E Winsor

Donald E Keski-Hynnila

Kevin Sisken

Dennis Michael Letang

Craig R Markyvech

Marleen F Thompson

Amr Radwan

Leopold Super

Zornitza Pavlinova Pavlova-MacKinnon

Marc Christian Allain

Jason Thomas Barton

Peter Zagone

Zhiping Han

Martin Fritz

Donald Michael McDonald

Miguel Menoyo-Alonso

Ronald William Mikulik

Jimmie L Priest, Jr

Todd C Slater

Hugh Joseph Cairns

James Edward Zuccaro

Victor James Meloche

Darren P Aherne

Karen Elizabeth Weber

Justin R Kollien

Kurt Joseph Couture

David John Brunette

Dennis J Sitek

A method to operate an electronic controlled internal combustion engine to perform on board NOx emissions level diagnostics. In one embodiment, the method may include operating the engine to maintain a predetermined temperature for a predetermined period of time, determining whether the engine operating status is stable for one of cruise control, idle engine speed, engine torque, or high idle regeneration for a predetermined period of time, cycling the EGR valve between a first position for a predetermined period of time and then in a second position for a predetermined period of time, a determining a change in engine out NOx levels to determine whether an engine component or system is malfunctioning.

Method of diagnosing several systems and components by cycling the EGR valve

A method to operate a vehicle equipped with an electronic controlled internal combustion engine. The engine fan is used as a dynamic fan brake when the vehicle exceeds a minimum predetermined operating parameter for a predetermined period of time, and is disabled once the vehicle is operating within predetermined operating parameters.

System and method of fan control

A method and system for controlling an engine controller in response to actual vehicle load.

Method and system for controlling a vehicle powertrain based upon actual vehicle load

A method for verifying the functionality of the components for a diesel particulate filter system based upon engine speed, engine torque, inlet and outlet exhaust pressure at the diesel particulate filter. Various sensor signals are compared to calibratable values in memory for a determination whether the diesel particulate filter system is functional.

Method for verifying the functionality of the components of a diesel particulate filter system

In one aspect, the present invention is directed to a method for operating an electronically controlled internal combustion engine in a vehicle to perform at least one rationality check on at least one sensor to detect impending sensor failure and verify component functionality. The engine is equipped with an engine control system (ECS) having a memory and in electronic communication with various sensors. The sensors transmit data signals to the ECS indicative of associated engine and vehicle component functionality. The method comprises determining a measured operating condition of a first component from sensor data signals indicative of first component functionality, determining a measured operating condition of a second component from sensor data signals indicative of second component functionality, comparing the measured condition of the first component to the measured operating condition of the second component to determine whether sensor readings from the first component are indicative of a component operating within a normal range but indicative of impending sensor or component failure, logging an indication of an impending sensor or component failure as a fault in MPU memory if it occurs for a predetermined period of time and for more than a predetermined number of times and drive cycles, and activating a warning alert to an operator and initiating remedial actions responsive to the indication of impending component or sensor failure. The data logged includes time of fault, type of fault, number of occurrences of the fault, number of drive cycles where the fault occurred and distance traveled with the fault logged.

Method of verifying component functionality on EGR and air systems

A method of detecting vehicle speed sensor failures is disclosed. The method is intended to prevent or discourage tampering with a vehicle's speed limiting system. The method includes the steps of determining whether the transmission is in neutral or whether the transmission is in its converter mode to prevent false indications of speed sensor failure under certain circumstances.

Method of detecting vehicle speed sensor failure

A method for an accelerator pedal safety in a vehicle with an internal combustion engine having an Electronic Control Unit, (ECU), said method comprising: starting the engine; determining whether the engine is running; determining whether there is a request for additional torque; determining whether an inhibit is enabled; determining whether the vehicle speed is above a preset threshold; enabling the accelerator pedal torque request; and, logging a fault in the ECU and enabling the appropriate lamps or visual fault indicators.

Method of enhancing accelerator pedal safety interlock feature

A method for controlling engine idle speeds for an internal combustion engine. The method includes operating the engine at a first idle speed when a first device is in a first operational state, and when the first device is in a second operational state and a second device is in a first operational state, and operating the engine at a second idle speed when the first device is in the second operational state and the second device is in a second operational state. The first idle speed is a low idle speed and the second idle speed is a high idle speed that is higher than the first idle speed, and the low idle speed is selected to provide reduced engagement torque to the second device and the high idle speed is selected to provide user desired acceleration performance.

System and method for controlling engine idle speed based on operational state settings

An engine control system () operates off a microprocessor of an engine control module, ECM (), which will automatically start a combustion engine () upon any one of a series of enabler signals () indicative of low battery voltage, low cab temperature and/or low engine temperature. The system () also includes safety measures which will override the automatic starting of the engine. For instance, the vehicle will not automatically start if a vehicle speed is detected, if the parking brake is not set, if the ignition key () is not in the 'on' position, or if the hood () is open. Moreover, the system () is configured not to start if the fuel level is low, thus preventing an unintended depletion of fuel which could strand the vehicle and operator.

Engine control system and method of automatic starting and stopping a combustion engine

An engine shutdown system is provided that includes an engine control module (ECM) () having sensors () that can activate an engine shutdown sequence. A set of redundant sensors () and a redundant engine control module (RECM) () can also activate an engine shutdown sequence independent of the ECM. Engine operating parameters are monitored by sensors to determine if one of the engine parameters deviates from an acceptable level. If the engine control determines that a parameter has exceeded a predetermined level, an engine shutdown signal may be generated by either the ECM or RECM that may cut off the fuel supply, interrupt an ignition circuit, or activate external engine shutdown devices and may also activate alarm and message panels. A redundant engine shutdown system is also provided to disable the primary engine control unit.

Redundant engine shutdown system

A system for modifying or disabling a selected engine function in response to a determination based upon a precipitation sensor input that precipitation is present. The system also may include an ambient temperature sensor that determines whether the ambient temperature is below a predetermined level. Signals from the precipitation sensor and temperature sensor are provided to an engine controller. The engine controller functions to modify or disable a selected engine function such as a compression brake, engine exhaust brake, maximum speed calibration or passing speed variance calibration.

System for changing a selected engine function based on sensed weather conditions

An engine control practices a method for engine control including detecting an overspeed indication selectively settable in the vehicle, responding to the threshold speed operation, and inhibiting response to the throttle control actuation when engine braking is desired. The engine braking may be enabled when said overspeed operation is maintained beyond its detection in combination with continued throttle actuation.

Method of engine overspeed protection by inhibiting operator throttle input

A method of determining an engine controller module (ECM) parameter set, the method includes specifying at least one criteria, determining whether at least one existing parameter set matches the specified criteria, presenting a report that indicates at least one matching parameter set when there is at least one matching parameter set, and presenting an alert when there is no matching parameter set, wherein the method is implemented via an ECM vendor extranet on a World Wide Web server.

System and method for determining a parameter set for an engine controller module

A method for estimating engine torque loss due to a fan. A table of maximum fan torque losses is compiled at a plurality of engine speeds. An engine control unit (ECU) is configured with the table of maximum fan torque losses. A first maximum fan torque loss and a second maximum fan torque loss for an engine speed are retrieved from the table. A maximum fan torque loss for the engine speed is estimated by interpolating between the first maximum fan torque loss and the second maximum fan torque loss. An engine torque loss estimate is calculated by adjusting the maximum fan torque loss based on a set of predetermined fan characteristics.

Method of estimating engine cooling fan power losses

An engine control system for a compression ignition engine employs a microprocessor-based controller that detects engine operation in a speed range previously determined to be undesirable, and responding to the detection by changing operation of the engine. In the preferred embodiment, the controller commands a parameter for adjusting engine operation to reach a different speed outside of first and second thresholds defining the undesirable range in a time period subsequent to the detection.

Method and apparatus for limiting engine operation in a programmable range

Growing community of inventors

Farmington Hills, MI, United States of America

Jeffery Scott Hawkins