Abstract: A method is provided for controlling an engine. In one example, the method may include injecting fuel to the engine; and during an operating condition, limiting injected fuel based on engine airflow to a smoke-fuel limit, the smoke-fuel limit transiently adjusted from a first smoke-fuel limit to a second smoke-fuel limit based on a duration operating at the smoke-fuel limit. In one example, the method may include during another operating condition, fuel injection not limited by the smoke-fuel limit. In some examples, the duration may be a time duration. In some examples, the duration may be a crank angle duration. In some examples, limiting the injected fuel is based on an estimated engine airflow and estimated fuel injection amount to the engine.

Abstract: A system is provided for connecting a battery to a mounting system. The battery is coupled to a battery connector, and the mounting system is coupled to a mounting system connector. The system includes an inner housing of the battery connector configured to receive a plurality of cables from the battery. The system further includes a respective plurality of male connectors or female receptacles positioned within the inner housing of the battery connector and coupled to the plurality of cables. The plurality of male connectors or female receptacles is configured to remain unexposed upon disconnecting the battery connector from the mounting connector during an unsafe event. The system further includes an outer housing of the battery connector surrounding the inner housing, where the outer housing includes a tapered wall.

Abstract: A method and system for determining a ground speed for locomotives (e.g., 12, 14) of a train (16) comprising at least two locomotives for use in controlling an operation of the train. The method includes selecting an axle of any one locomotive of the train for measuring a speed corresponding to the selected axle. The method also includes determining a ground speed for at least another locomotive of the train based on a measured speed corresponding to the selected axle of the one locomotive.