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Fuel control-in GPS-tracking system

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toplivo.jpg The work and the benefits of GPS-monitoring systems, vehicles written quite a lot. They allow, in addition to the parameters of motion sensors to monitor differences, such as fuel control sensors. Since the issue of economies of today are extremely relevant, the following will discuss methods of fuel control.

Fuel in the GPS-monitoring can be controlled by several methods, which vary in the amount of information, accuracy and price.

Method of calculation. This is the easiest and cheapest method that does not require any intervention from the fuel system, but at the same time the most inaccurate. Enough to enter into a computer program standard for a specific fuel consumption of a vehicle equipped with GPS-controller. The program multiplies the standard mileage rate according to the satellite system and the result is a fuel consumption over time. Despite the primitive method, it is still essentially the exact same calculation performed on the basis of data from the odometer mileage that are easy to forge. Also, the odometer error, especially in machinery production of the CIS, can be substantial. Please note that the data on fuel consumption will be considered not in themselves, but in combination with the real mileage of the car, displayed on the map. That is, the manager will see that all flights are made in accordance with assignments to a designated route followed by a machine, whether there had been "left" flights. It should be noted that the current method does not allow to see the place and time of refills or drains.

Fuel level sensors.  Fuel control is provided by a level sensor in the fuel tank which is connected to the onboard GPS-controller. This is a more accurate method. There are also possible options, which differ in accuracy and price. Cheapest way to connect to the standard gauge car. At the same time as there is no interference with the fuel system. However, the error in this case is quite large: for domestic cars with mechanical float gauges up to 20% for foreign cars 5 ... 10%. Wear sensor with matters too. Thus, the connection is full-time fuel gauge to GPS-enable the controller with some precision control fuel consumption and to see the actual (time and place) dressings or drains, if any. Much more accurate is the installation of the fuel tank of high-precision electronic level sensor. The most common type - is capacitive and ultrasonic sensors. They have no moving parts, no wear. The error of these sensors is about the same and amounts to 1-2% of the amount of fuel in the tank, and the price is much less than one full charging of the truck. That is, if you connect to the standard sensor can see the place and time of filling or emptying fuel, in the presence of high-precision sensor can be seen - how many liters replenished \ merged. Features of this method: there is no interference in the engine fuel system, sensors can be installed in almost any tanks, sensors, reliable, low cost. At the same time, the relatively low accuracy, if the machine is running on rough terrain, because the slopes of the tank, and in small intervals of time (range), due to slight changes in the level of fuel.

Fuel flow sensor. There is a group of vehicles which are characterized by relatively high fuel consumption and at the same time moving to a small area, for example - excavators, bulldozers, forklifts. Another group of vehicles has a flow rate of almost (or completely) independent of the path, for example - additional engine mixer mixer or refrigerator. In such cases, to control the fuel flow sensor can be used. In contrast to the level sensor which is installed directly into the tank, these sensors are installed in the rupture of the fuel system and show no fuel level, and how much fuel is "ate" the engine. Features of this method. The main difference from the flow of fuel level sensor is a direct calculation of fuel consumed in liters. That is in contrast to the level sensor is measured fuel consumption for any period of time. At the same time, this method can not control the amount of fuel in the tank, the volume of gas stations and facts discharges, requires the intervention of the fuel system. Installation of the sensor in fuel consumption - is complex, requires some qualification. Possible contamination of the sensor. Present mechanical wear. Not all the fuel sensor system may embed. On some machines, install the sensor can lead to changes in engine operating conditions. A significant rise in the solution for high-performance engines, especially when using a differential scheme of (two high-performance sensor in a straight channel fuel and return).

Fuel control for CAN. Is not a method of measurement. This method of obtaining data from the onboard computer machine. In modern automobiles, tractors, special equipment is used on-board CAN bus information. In the CAN bus has information about the parameters of the machine, in particular: the current fuel consumption, fuel level, engine RPM, speed, axle load, the inclusion of actuators, etc. Information about the fuel consumption of on-board computer and has a significant error, depending on engine wear. Require calibration. Information about the level of fuel in the tank goes from full-time fuel level sensor, which has a significant error (instability, nonlinearity, low resolution), the dead zone at the top and bottom of the tank. Information about the fuel consumption is calculated on-board computer machine. The same volume of the obtained information is not guaranteed standards, as determined by the equipment manufacturers.

What do we get the result?

 

What we are graphs poluchaNizhe fuel level for the period of time, obtained from different machines to connect different types of fuel level sensors. The vertical axis - the amount of fuel in the tank in liters. The horizontal - time (seconds, minutes, hours, days). Sloping line is the fuel consumption of a tank, vertical lines - fuel ups.

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Example chart automobile fuel level Chinese JAC. Connect to the standard gauge.

It is seen that the flow line has a lot of "surges" that hinder the analysis. This is due to imperfections in the regular gauge, although the machine is brand new. On older cars with worn sensors sweep "surges" can be so large that it is not clear where the real gas station, and where not.

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Example chart automobile fuel level MAN. Connect to the standard gauge.

 

Line flow is much smoother (the program data in all graphs is the same), which indicates a higher quality sensor.

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Example graph fuel gauge MAZ. In the tank mounted capacitive sensor.

Here, comments are not needed. How to make the right choice. In summary we can say that: - staff level sensor will see about fuel consumption, time and place of gas stations and sinks, - an electronic level sensor will accurately see fuel consumption, fuel stations and plums - flow sensor with high accuracy will show fuel consumption, but not allows you to see the place, time and amount of refills \ sinks.

To make the right choice, you must first have ... to choose from! The company will help you find the RCC solution to control the fuel most optimally suited to you. We have extensive experience editing. Manufactured at our factory certified on-board GPS-controllers and fuel level sensors. Our experts have experience in installation of equipment for trucks and passenger cars, buses, tractors, combine harvesters. We can connect to the standard gauge of your car, install a precision electronic level sensor or fuel flow meter.