Abstract:
Various methods and systems are provided diagnosing a valve. In one example, a system comprises a valve configured to regulate a fuel flow, and a controller configured to determine degradation of the valve based on an initial opening characteristic of the valve.
Abstract:
Various methods and systems are provided for a leakage passageway for a fuel injector of a common rail fuel system. In one embodiment, a fuel injector for an engine comprises an injector accumulator, an injector flow limiter valve configured to control a flow of fuel from a common fuel rail and into the injector accumulator, and a leakage passageway coupled between the injector accumulator and an inlet of the injector flow limiter valve, the leakage passageway bypassing the injector flow limiter valve.
Abstract:
Various methods and systems are provided for a leakage passageway for a fuel injector of a common rail fuel system. In one embodiment, a fuel injector for an engine comprises an injector accumulator, an injector flow limiter valve configured to control a flow of fuel from a common fuel rail and into the injector accumulator, and a leakage passageway coupled between the injector accumulator and an inlet of the injector flow limiter valve, the leakage passageway bypassing the injector flow limiter valve.
Abstract:
An inspection system includes sensors that are selectively coupled to a vehicle during an inspection or maintenance event for the vehicle and a controller that is operable to cause a control system of the vehicle that controls plural operations of the vehicle to initiate a first operation and a different, second operation. The controller determines whether the control system has first sensor information indicative of a state of the vehicle during the first operation. The controller sends a command signal to the control system to direct the control system to change vehicle operations from the first operation to the second operation responsive to determining that the control system lacks the first sensor information. The controller obtains second sensor information from the one or more sensors based on the second operation and determines a condition of components of the vehicle based on the first and second sensor information.
Abstract:
Various methods and systems are provided for indexing an injector map and subsequently controlling fuel injection to an engine. In one embodiment, a non-transitory computer readable storage medium with memory comprises fuel injector activation data indexed in the memory according to an input parameter, instructions for determining a modified pressure value based on a determined pressure and a modified pressure function, and instructions for generating a fuel injector activation output by interpolating among the indexed fuel injector activation data with the modified pressure value as the input parameter.
Abstract:
An inspection system includes sensors that are selectively coupled to a vehicle during an inspection or maintenance event for the vehicle and a controller that is operable to cause a control system of the vehicle that controls plural operations of the vehicle to initiate a first operation and a different, second operation. The controller determines whether the control system has first sensor information indicative of a state of the vehicle during the first operation. The controller sends a command signal to the control system to direct the control system to change vehicle operations from the first operation to the second operation responsive to determining that the control system lacks the first sensor information. The controller obtains second sensor information from the one or more sensors based on the second operation and determines a condition of components of the vehicle based on the first and second sensor information.
Abstract:
A locomotive engine control system includes one or more processors operably connected to fuel supply devices. The fuel supply devices are configured to supply fuel into different corresponding cylinders of an engine. The one or more processors are configured to monitor a fuel quantity injected into the cylinders of the engine before and after communication of an overfuel control signal. The overfuel control signal commands the fuel supply device corresponding to a first cylinder of the cylinders to supply excess fuel into the first cylinder. Responsive to the fuel quantity that is monitored not decreasing after the communication of the overfuel control signal, the one or more processors are configured to determine that the fuel supply device corresponding to the first cylinder is defective, and may generate one or more control signals indicative of the fuel supply device corresponding to the first cylinder being defective.
Abstract:
A locomotive engine control system includes one or more processors operably connected to fuel supply devices. The fuel supply devices are configured to supply fuel into different corresponding cylinders of an engine. The one or more processors are configured to monitor a fuel quantity injected into the cylinders of the engine before and after communication of an overfuel control signal. The overfuel control signal commands the fuel supply device corresponding to a first cylinder of the cylinders to supply excess fuel into the first cylinder. Responsive to the fuel quantity that is monitored not decreasing after the communication of the overfuel control signal, the one or more processors are configured to determine that the fuel supply device corresponding to the first cylinder is defective, and may generate one or more control signals indicative of the fuel supply device corresponding to the first cylinder being defective.
Abstract:
Various methods and systems are provided diagnosing a valve. In one example, a system comprises a valve configured to regulate a fuel flow, and a controller configured to determine degradation of the valve based on an initial opening characteristic of the valve.
Abstract:
Various methods and systems are provided for indexing an injector map and subsequently controlling fuel injection to an engine. In one embodiment, a non-transitory computer readable storage medium with memory comprises fuel injector activation data indexed in the memory according to an input parameter, instructions for determining a modified pressure value based on a determined pressure and a modified pressure function, and instructions for generating a fuel injector activation output by interpolating among the indexed fuel injector activation data with the modified pressure value as the input parameter.