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cms:units:fuel [09/07/2018 07:08]
tagr vean
cms:units:fuel [24/09/2018 12:56] (current)
tagr
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 :!: Required access: //View detailed properties//​ — to view the tab; //Edit trip detector and fuel consumption//​ — to edit the tab. :!: Required access: //View detailed properties//​ — to view the tab; //Edit trip detector and fuel consumption//​ — to edit the tab.
  
-Fuel fillings and thefts can be detected only if a unit has [[cms/​units/​sensors/​types#​fuel|fuel level sensors]] and has the //[[#Fuel level sensors|Fuel level sensors]]// option activated. Fuel consumption is calculated if there are fuel consumption sensors. The determination accuracy depends on the accuracy of the installed sensors as well as on their correct configuration. The parameters adjusted on this tab are used during the calculations. For your convenience they are divided into several sections. ​+Fuel fillings and thefts can be detected only if a unit has [[cms/​units/​sensors/​types#​fuel|fuel level sensors]] and has the //[[#Fuel level sensors|Fuel level sensors]]// option activated. Fuel consumption is calculated if there are fuel consumption sensors. The determination accuracy depends on the accuracy of the installed sensors as well as on their correct configuration. The parameters adjusted on this tab are used during the calculations. For your conveniencethey are divided into several sections. ​
  
 {{ :​units:​fuel.png?​nolink }} {{ :​units:​fuel.png?​nolink }}
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 **Minimum fuel theft volume**\\ The minimum decrease of the fuel level that should be considered a theft. ​ **Minimum fuel theft volume**\\ The minimum decrease of the fuel level that should be considered a theft. ​
  
-**Ignore the messages after the start of motion**\\ This feature allows to skip the indicated number of seconds at the beginning of the movementwhen due to different factors the received fuel level data may not be very accurate. The beginning of the movement is registered when the [[cms/​units/​trip#​movement_detection|minimum moving speed]] set in the //Trip detection// tab is achieved. ​+**Ignore the messages after the start of motion**\\ This feature allows to skip the indicated number of seconds at the beginning of the movement when due to different factors the received fuel level data may not be very accurate. The beginning of the movement is registered when the [[cms/​units/​trip#​movement_detection|minimum moving speed]] set in the //Trip detection// tab is achieved. ​
  
 **Minimum stay timeout to detect fuel theft**\\ The minimum duration of the interval with no movement, followed by a decrease in the fuel level in the tank for more than the minimum fuel theft volume indicated above. ​ **Minimum stay timeout to detect fuel theft**\\ The minimum duration of the interval with no movement, followed by a decrease in the fuel level in the tank for more than the minimum fuel theft volume indicated above. ​
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 **Timeout to detect final filling volume**\\ in the process of filling there can be interruptions. This option appears if the previous one is selected and allows to set the duration of such interruptions. In this case to determine the fuel level after refueling, not the last message that corresponds to a filling is used, but the one that follows the indicated timeout. ​ **Timeout to detect final filling volume**\\ in the process of filling there can be interruptions. This option appears if the previous one is selected and allows to set the duration of such interruptions. In this case to determine the fuel level after refueling, not the last message that corresponds to a filling is used, but the one that follows the indicated timeout. ​
  
-**Detect fuel thefts in motion**\\ Traditionally,​ fuel thefts are searched during the stops. This feature allows to search for them during the motion, too. For example, it may be useful for ships. However, in many cases it may cause the detection of false fuel thefts due to probable fuel level differences while, for instance, moving on rough terrain.+**Detect fuel thefts in motion**\\ Traditionally,​ fuel thefts are searched during the stops. This feature allows to search for them during the motion, too. For example, it may be useful for ships. However, in many casesit may cause the detection of false fuel thefts due to probable fuel level differences while, for instance, moving on rough terrain.
  
 **Time-based calculation of fillings**\\ It is recommended to use this calculation method for the units with high fuel consumption during the idling (generator, tower crane, etc.). When it is activated, the whole time period is taken into account regardless of trips/​stops. ​ **Time-based calculation of fillings**\\ It is recommended to use this calculation method for the units with high fuel consumption during the idling (generator, tower crane, etc.). When it is activated, the whole time period is taken into account regardless of trips/​stops. ​
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 The mathematical calculation takes into account such basic parameters as fuel consumption in urban and suburban cycles. The average speed in the urban cycle is considered to be 10 m/s (36 km/h) and in the suburban cycle — 22 m/s (80km/h). The calculation algorithm is as follows: The mathematical calculation takes into account such basic parameters as fuel consumption in urban and suburban cycles. The average speed in the urban cycle is considered to be 10 m/s (36 km/h) and in the suburban cycle — 22 m/s (80km/h). The calculation algorithm is as follows:
   - On the basis of the urban and suburban speeds and the fuel consumption parameters that correspond them a chart is created. The chart below was created according to the default data (10 and 7 liters per 100 km, respectively). {{  :​units:​math_chart.png?​nolink ​ }}   - On the basis of the urban and suburban speeds and the fuel consumption parameters that correspond them a chart is created. The chart below was created according to the default data (10 and 7 liters per 100 km, respectively). {{  :​units:​math_chart.png?​nolink ​ }}
-  - The fuel consumption during the movement is calculated. Let us assume, that we have two messages from a unit with the speeds V1 = 50 km/h, V2 = 60 km/h and the distance between them 0.15 km. Now we calculate the average speed: (50 + 60) / 2 = 55 km/h.\\ According to the chart, the consumption for this speed is 8.7 l/100 km. The total fuel consumed is: 0.15 * 8.7 / 100 = 0.01305 (l).\\ As seen in the chart, if the average speed is lower than 36 km/h, the consumption is considered to be 10 l/100 km. If it is higher than 80 km/h, the consumption is 7 l/100 km. +  - The fuel consumption during the movement is calculated. Let us assume, that we have two messages from a unit with the speeds V1 = 50 km/h, V2 = 60 km/h and the distance between them is 0.15 km. Now we calculate the average speed: (50 + 60) / 2 = 55 km/h.\\ According to the chart, the consumption for this speed is 8.7 l/100 km. The total fuel consumed is: 0.15 * 8.7 / 100 = 0.01305 (l).\\ As seen in the chart, if the average speed is lower than 36 km/h, the consumption is considered to be 10 l/100 km. If it is higher than 80 km/h, the consumption is 7 l/100 km. 
   - If there is an [[cms/​units/​sensors/​types|engine efficiency sensor (sensors)]],​ its values are used. If the sensor is activated in both messages, then the volume of the consumed fuel is multiplied by the sensor'​s value. That is, if the sensor'​s value is 1.3, we get: 0.01305 * 1.3 = 0,016965 (l). If there are several such sensors, their values are summed: <​nowiki>​((k1+ (k2-1) + (k3-1))*N</​nowiki>,​ where //k// are the sensors'​ values and //N// is the volume of the fuel consumed during the interval. If the sum of the coefficients is less than 0, the total coefficient will be 1.      - If there is an [[cms/​units/​sensors/​types|engine efficiency sensor (sensors)]],​ its values are used. If the sensor is activated in both messages, then the volume of the consumed fuel is multiplied by the sensor'​s value. That is, if the sensor'​s value is 1.3, we get: 0.01305 * 1.3 = 0,016965 (l). If there are several such sensors, their values are summed: <​nowiki>​((k1+ (k2-1) + (k3-1))*N</​nowiki>,​ where //k// are the sensors'​ values and //N// is the volume of the fuel consumed during the interval. If the sum of the coefficients is less than 0, the total coefficient will be 1.   
   - If the ignition is on, the consumption during stops (idling) is calculated. Let us suppose, that we have two messages from a unit with the speeds V1 = 0 km/h, V2 = 1 km/h and 65 seconds between them. Using the parameter '​Idling'​ (2 l/h by default) we determine the total fuel volume consumed: 2 * 65 / 3600 = 0.0361 (l). If the unit has an engine efficiency sensor, its values are used also for calculating the fuel consumption during idling (see point 3).\\ :!: //Note.//\\ If the parameters of consumption in urban and suburban cycles are zero, the average speed is not being checked, and all the consumption is calculated as during the idling.   - If the ignition is on, the consumption during stops (idling) is calculated. Let us suppose, that we have two messages from a unit with the speeds V1 = 0 km/h, V2 = 1 km/h and 65 seconds between them. Using the parameter '​Idling'​ (2 l/h by default) we determine the total fuel volume consumed: 2 * 65 / 3600 = 0.0361 (l). If the unit has an engine efficiency sensor, its values are used also for calculating the fuel consumption during idling (see point 3).\\ :!: //Note.//\\ If the parameters of consumption in urban and suburban cycles are zero, the average speed is not being checked, and all the consumption is calculated as during the idling.
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 Unlike the previous method, the fuel consumption by rates only takes into consideration mileage and season (summer/​winter). ​ Unlike the previous method, the fuel consumption by rates only takes into consideration mileage and season (summer/​winter). ​
  
-Specify the rates for fuel consumption in summer and in winter and the duration of winter period. ​+Specify the rates for fuel consumption in summer and in winter and the duration of the winter period. ​
  
 The following algorithm is used for the calculation. Let us assume, that we have the mileage of 0.15 km between two messages on January, 13. The fuel consumption in winter (from the 1<​sup>​st</​sup>​ December till the 29<​sup>​th</​sup>​ February) is: 0.15 * 12 / 100 = 0.018 (l). The consumption for the same mileage in summer (10 l /100 km) will be: 0.15 * 10 / 100 = 0.015 (l). The following algorithm is used for the calculation. Let us assume, that we have the mileage of 0.15 km between two messages on January, 13. The fuel consumption in winter (from the 1<​sup>​st</​sup>​ December till the 29<​sup>​th</​sup>​ February) is: 0.15 * 12 / 100 = 0.018 (l). The consumption for the same mileage in summer (10 l /100 km) will be: 0.15 * 10 / 100 = 0.015 (l).
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 The sensors of this type show the fuel consumption during all the period of vehicle operation. AbsFCS values increase all the time, so overflow of such a sensor is not expected. The sensors of this type show the fuel consumption during all the period of vehicle operation. AbsFCS values increase all the time, so overflow of such a sensor is not expected.
  
-The fuel consumption is calculated in the following way: the sensor'​s value at the beginning of thw interval is subtracted from the sensor'​s value at the end of the interval and, if needed, the calculation table is applied (to every sensor of this type individually).+The fuel consumption is calculated in the following way: the sensor'​s value at the beginning of the interval is subtracted from the sensor'​s value at the end of the interval and, if needed, the calculation table is applied (to every sensor of this type individually).
  
 ===== Instant Fuel Consumption Sensors ===== ===== Instant Fuel Consumption Sensors =====
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