An acquisition unit acquires weather and marine data indicating a ship voyage schedule that serves as a reference, actual performance data, fuel consumption data, and weather and marine conditions the ship has encountered during a voyage. A time difference data generation unit calculates the difference between the time indicated by the reference data and the time indicated by the actual performance data for each of the journeys between ports. Projected fuel consumption calculation unit calculates projected fuel consumption for each of the journeys between ports based on the reference data, weather and marine data and fuel consumption data. Fuel consumption difference data generation unit calculates the difference between the projected fuel consumption and the actual fuel consumption amount indicated by the actual performance data for each of the journeys between ports.

An acquisition unit acquires weather and marine data indicating a ship voyage schedule that serves as a reference, actual performance data, fuel consumption data, and weather and marine conditions the ship has encountered during a voyage. A time difference data generation unit calculates the difference between the time indicated by the reference data and the time indicated by the actual performance data for each of the journeys between ports. Projected fuel consumption calculation unit calculates projected fuel consumption for each of the journeys between ports based on the reference data, weather and marine data and fuel consumption data. Fuel consumption difference data generation unit calculates the difference between the projected fuel consumption and the actual fuel consumption amount indicated by the actual performance data for each of the journeys between ports.

The present disclosure provides systems and methods for determining or providing fuel information of a vehicle, such as predicting fuel intake and usage for the vehicle. A method for predicting a fueling event of a vehicle comprises using a mobile computing device carried in the vehicle to track the vehicle along a route. Multiple stop events may be detected when tracking the vehicle, and for each of the multiple stop events, each of duration and a geographic location may be determined. Next, a given stop event of the multiple stop events may be determined to be a fueling event based at least in part on a duration and geographic location of the given stop event.

The present disclosure provides systems and methods for determining or providing fuel information of a vehicle, such as predicting fuel intake and usage for the vehicle. A method for predicting a fueling event of a vehicle comprises using a mobile computing device carried in the vehicle to track the vehicle along a route. Multiple stop events may be detected when tracking the vehicle, and for each of the multiple stop events, each of duration and a geographic location may be determined. Next, a given stop event of the multiple stop events may be determined to be a fueling event based at least in part on a duration and geographic location of the given stop event.

Methods and systems are provided for compensating an instantaneous fuel economy reading for stored energy. One method comprises, when a vehicle undergoes a sufficient change in one or more of square of vehicle speed and vehicle altitude, estimating a conversion factor for fuel due to stored vehicle energy and adjusting the instantaneous fuel economy reading by the estimated conversion factor. The adjusted instantaneous fuel economy reading may be displayed to an operator of the vehicle.

A method for operating an engine system 200 comprising an engine 208 configured to consume a fuel, having at least a two flowmeters 214, 216, is provided. The method includes the step of operating an engine 208 disposed between a supply flowmeter 214 of the at least two flowmeters and a return flowmeter 216 of the at least two flowmeters. A first fuel density in the supply flowmeter 214 and a second fuel density in the return flowmeter 216 are measured. The fuel density measurements 317 between the supply flowmeter 214 and return flowmeter 216 are compared and a differential density measurement value, ?? 319, based on a difference in the second fuel density and the first fuel density is determined. The ?? 319 is compared to a range of theoretical differential fuel density values, ??.sub.t, and potential fuel contamination is indicated if the ?? lies outside a range of ??.sub.t values by a predetermined threshold.

The present disclosure provides systems and methods for determining or providing fuel information of a vehicle, such as predicting fuel intake and usage for the vehicle. A method for predicting a fueling event of a vehicle comprises using a mobile computing device carried in the vehicle to track the vehicle along a route. Multiple stop events may be detected when tracking the vehicle, and for each of the multiple stop events, each of duration and a geographic location may be determined. Next, a given stop event of the multiple stop events may be determined to be a fueling event based at least in part on a duration and geographic location of the given stop event.

The present disclosure provides systems and methods for determining or providing fuel information of a vehicle, such as predicting fuel intake and usage for the vehicle. A method for predicting a fueling event of a vehicle comprises using a mobile computing device carried in the vehicle to track the vehicle along a route. Multiple stop events may be detected when tracking the vehicle, and for each of the multiple stop events, each of duration and a geographic location may be determined. Next, a given stop event of the multiple stop events may be determined to be a fueling event based at least in part on a duration and geographic location of the given stop event.

Side-view mirror deployment in autonomous vehicles can be diagnosed by determining one or more first rates of fuel consumption and deploying one or more side-view mirrors. One or more second rates of fuel consumption can then be determined and one or more deployment states of the side-view mirror can be controlled based on the first rates of fuel consumption and the second rates of fuel consumption.

A fuel consumption-measuring system includes a feed line, a first pump which pumps fuel from a tank via the feed line to a consumer, a fuel consumption-measuring device in the feed line, a first return line which branches off at the consumer and opens into the feed line between the fuel consumption-measuring device and the consumer, a second return line which branches off from the feed line between the first pump and the fuel consumption-measuring device which opens into the tank, a branch which leads from the feed line into the second return line, a heat exchanger, and a flow device arranged in the first and second return lines. The flow device provides an equal volume flow at an opening of the first return line into the feed line and at the branch leading from the feed line into the second return line.