Abstract: 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.

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

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An engine control system (10) operates off a microprocessor of an engine control module, ECM (62), which will automatically start a combustion engine (12) upon any one of a series of enabler signals (68, 67, 70) indicative of low battery voltage, low cab temperature and/or low engine temperature. The system (10) 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 (50) is not in the “on” position, or if the hood (56) is open. Moreover, the system (10) 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.

Abstract: 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.

Abstract: 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.

Abstract: An engine control system (10) operates off a microprocessor of an engine control module, ECM (62), which will automatically start a combustion engine (12) upon any one of a series of enabler signals (68, 67, 70) indicative of low battery voltage, low cab temperature and/or low engine temperature. The system (10) 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 (50) is not in the “on” position, or if the hood (56) is open. Moreover, the system (10) 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A snow blower, vehicle having a blower engine and a propulsion engine is provided with a drvice for limiting the speed of operation of the snow blower vehicle if the blower engine is overloaded. A first signal is transmitted to the propulsion engine when the blower engine is overloaded and a second signal is transmitted to the propulsion engine when the blower engine is no longer being overloaded. The first signal may be provided to the propulsion engine to automatically limit the output thereof or it may be provided to generate an operator perceptible warning to the operator of the vehicle. The second signal may be provided to the propulsion engine to discontinue the limitation of the output of the propulsion engine or to stop the generation of the warning. A method of improving snow blower performance by increasing the ability of the blower engine to blow snow by limiting the output of the propulsion engine.

Abstract: Various control strategies and techniques for controlling a variable speed fan in an internal combustion engine are provided. The various control techniques improve fuel economy by operating the fan at a speed sufficient to cool the engine, while avoiding unnecessarily higher speeds that result in poor fuel economy. Further, the fan may be completely disabled at cold start up to avoid over cooling, particularly in an engine using a charge air cooling system.

Abstract: Various control strategies and techniques for controlling a variable speed fan in an internal combustion engine are provided. The various control techniques improve fuel economy by operating the fan at a speed sufficient to cool the engine, while avoiding unnecessarily higher speeds that result in poor fuel economy. Further, the fan may be completely disabled at cold start up to avoid over cooling, particularly in an engine using a charge air cooling system.

Abstract: An engine controller capable of operating in both a torque governing mode and a speed governing mode simultaneously, and a method of operation whereby speed governing may be enabled and disabled while simultaneously providing a valid speed request signal to the controller is disclosed. A speed governor signal having an enabled state and a disabled state is generated external to the controller and monitored by the speed governor. A speed request signal is simultaneously monitored by the speed governor. The speed governor is operative to control the speed of the engine proportional to the speed request signal while the speed governor signal is in the enabled state. The speed governor is disabled by setting the speed governor signal into the disabled state. A torque governor may also be operational within the controller. The torque governor monitors a torque request signal which it uses to control a torque generated by the engine.

Abstract: A system and method for controlling engine speed of an internal combustion engine provide automatically returning to a set speed selected with a hand throttle after operating at idle or near idle. The system and method are particularly suited for operation in driving a mud pump used in petroleum drilling applications where the operator dials-in a desired operating speed corresponding to a desired pumping rate. The engine is returned to idle or near idle to allow additional sections of pipe to be added. The engine then automatically returns to the previously selected set speed without additional manipulation of the hand throttle. In one embodiment, dual hand throttles are provided to support remote station operation and control of the engine speed.

Abstract: A method of controlling an internal combustion engine having a variable speed fan driven by a torque multiplying fan driver includes controlling the variable speed fan with closed loop control based on fan speed.

Abstract: A method of controlling an internal combustion engine having a variable speed fan includes controlling the variable speed fan with closed loop control based on fan motor hydraulic pressure. A reference fan pressure is based on an applied fan request signal. The actual fan motor pressure is monitored, and an error signal is determined by comparing the reference fan pressure to the actual fan pressure. The fan is driven based on the error signal.