An onboard system that reduces a mental pressure on a driver includes a remaining amount detector that detects a remaining amount of a power source remaining in a vehicle, a lighting detector that detects that a low power source indicator provided in the vehicle lights up, a lighting remaining amount storage unit that stores, as a lighting remaining amount, the remaining power source amount detected by the remaining amount detector at a timing at which the lighting detector detects the lighting of the low power source indicator, a notification remaining amount detector that detects a remaining power source amount larger by a predetermined amount than the lighting remaining amount stored in the lighting remaining amount storage unit, and a notifier that notifies information for promoting supply of the power source after the remaining power source amount larger than the lighting remaining amount by the predetermined amount is detected before the lighting remaining amount is detected.

An onboard system that reduces a mental pressure on a driver includes a remaining amount detector that detects a remaining amount of a power source remaining in a vehicle, a lighting detector that detects that a low power source indicator provided in the vehicle lights up, a lighting remaining amount storage unit that stores, as a lighting remaining amount, the remaining power source amount detected by the remaining amount detector at a timing at which the lighting detector detects the lighting of the low power source indicator, a notification remaining amount detector that detects a remaining power source amount larger by a predetermined amount than the lighting remaining amount stored in the lighting remaining amount storage unit, and a notifier that notifies information for promoting supply of the power source after the remaining power source amount larger than the lighting remaining amount by the predetermined amount is detected before the lighting remaining amount is detected.

A method for determining individual fuel consumption characteristics of different generator units of an electricity generating assembly, includes an acquisition of operation data including, for several acquisition times, a measurement of a total fuel flow rate consumed by the generating assembly, and measurements of the respective load rates of the different generator units, and a determination of the individual fuel consumption characteristics of these different generator units, from these acquired operation data.

A method for determining individual fuel consumption characteristics of different generator units of an electricity generating assembly, includes an acquisition of operation data including, for several acquisition times, a measurement of a total fuel flow rate consumed by the generating assembly, and measurements of the respective load rates of the different generator units, and a determination of the individual fuel consumption characteristics of these different generator units, from these acquired operation data.

For the functional testing of an arrangement for dynamic fuel consumption measurement, at least two reference flows are produced through successive operation, at different frequencies, of a system pump (6) provided in any case for the regulated fuel flow, and the gradient determined from the reference measured values obtained is compared with the known gradients of the characteristic curve of the system pump (6).

A bubble counter includes a body. The body is provided with a gas inlet, a gas outlet, a cavity, a water inlet, a water inlet channel, a first check valve and a second check valve. An end of the water inlet channel is connected to the water inlet, and another end of the water inlet channel is connected to the cavity. The first check valve is arranged between the gas inlet and the cavity, and the second check valve is arranged at a connection between the water inlet channel and the cavity. The water inlet channel and the gas outlet are independent from each other. With the bubble counter, it is not required to turn off or disassemble the bubble counter, water can be added at any time and gas leakage can be prevented.

Disclosed herein are methods and systems for dynamically calculating a total fuel uplift quantity for an aircraft scheduled to fly a flight route. In one aspect, a method comprises: (a) polling a plurality of sources to receive data indicative of: (i) real-time weather conditions in remaining flight sectors in the flight route, and (ii) delay information in the remaining sectors; (b) calculating for the remaining sectors a respective fuel consumption factor; (c) based on (i) respective fuel quotations in the remaining sectors, (ii) the real-time weather conditions, and (iii) the delay information, generating a linear model for calculating a respective fuel uplift quantity at arrival stations in the remaining sectors; (d) calculating using the linear model the respective fuel uplift quantity at the arrival stations; and (e) periodically performing operations (a)-(d) to update a calculation of the respective fuel uplift quantities to account for changing factors.

There is provided a remote server that receives a machine type, an operating day, a position, a load factor, an engine rotational speed, a traveling speed, and a fuel consumption amount. The remote server identifies a working position based on the position, selects past operating days of an operation status corresponding to a current load factor of the same machine at the same working position, identifies a minimum fuel consumption amount out of fuel consumption amounts corresponding to the selected past operating days, and compares a current fuel consumption amount with the past minimum fuel consumption amount. If the current fuel consumption amount is larger than the past minimum fuel consumption amount, the remote server transmits an engine rotational speed and a traveling speed during a working period of the minimum fuel consumption amount, to a predetermined communication terminal corresponding to information for machine identification.

Calibration of a valve in a vacuum system and providing a diagnostic indication in the vacuum system using the calibration includes measuring conductance of the valve as a function of angular valve position and generating a conductance calibration map or function for use during operation of the valve. An actual angular valve position is set based on the received set point angular valve position and a difference between the measured valve conductance and a predefined metric of conductance versus angular valve position. An actual system conductance and a difference between the actual system conductance and a reference system conductance for the system are determined. The diagnostic indication of a fault in the system is generated based on the actual angular valve position of the valve and the difference between the actual system conductance and the reference system conductance for the system.

A control system for controlling operation of a fluid delivery system that includes a first and second pumps for delivering first and second fluids for mixing. A controller includes a first pump map having a first pump flow rate mapped against a control output signal, and a second pump map having a second pump flow rate mapped against a control output signal. The controller determines the control output signal for the first pump to obtain a desired flow rate from the first pump, and the control output signal for the second pump to obtain a target flow rate and a target percentage of the second fluid relative to the first fluid or a target percentage of the second fluid relative to an overall fluid flow. The output signals for the first and second pumps are determined using the first and second pump maps.