fuel consumption vs speed formula

Fuel Consumption is calculated using a formula from the official Wiki for Sunless Sea. Vessel undertakes a voyage from Port Top to Port Bottom about 8000 Nm apart, taking 655.7hrs to … The Honda Insight hybrid showed the largest drop in fuel economy—over 15 mpg going from 55 to 75 mph. rotational speed the brake specific fuel consumption become more. FE = Fuel Economy; d = Distance travelled; V = Fuel volume; Distance Travelled. its get more significant in high speeds (80+ km/h) which 80% of fuel consumption is for air drag resistance and 20% is for friction resistance. As expected, the higher the engine speed and load (torque), the higher the fuel mass flow rate. In most cases it will tell you your range, ie. Light is 0 if off, 1 if on. See the graph below (from fueleconomy.gov): Use this calculator to determine your numbers: MPG For Speed Calculator. However, formulating your fuel consumption may not always be 100% accurate, but it’s a great place to start! how many more kilometres you can travel before you need to fill up. Average Speed and Fuel Consumption To change a time longer than an hour into a decimal, express the Total time in minutes and divide by 60 2hours 30 mins = 150mins 1 hour 45 mins = 105mins The specific fuel consumption, denoted as C j, measures the weight flow rate of fuel (lb/hr) used for each unit of thrust (lb) produced and is a major figure of merit for engines.This variable is dependent upon the fuel flow rate for the actual thrust level produced and is often quoted by the manufacturer as evaluated at the static or takeoff thrust level, F to. In this example, at an inland petrol price of R16.85/litre, it would cost you R122.67 to drive 100km. The chart above depicts the relationship between the fuel consumption and the average speed of a typical small gasoline (< 1400 cm³) Euro 4 passenger car. The chart can be divided into four areas, corresponding to four velocity ranges: The power required follows an equation of the following form: road load power = av + bv² + cv³. Fuel Consumption = (Final Mileage - Starting Mileage) / Fuel Usage Fuel Consumption = (23,889mi - 23,500mi) / 12.5 gallons Fuel Consumption = 389mi / 12.5 gallons Formula To Estimate Maximum Engine Fuel Consumption. Gallon Per Hour (GPH) = (specific fuel consumption x HP)/Fuel Specific Weight. Constants Gas Diesel. SFC .50 lb. per HP .40 lb. per HP. FSW 6.1 lb. per gal. Fuel (GPH) = Horsepower/10.5. This would make a fuel efficiency of 30 mpg at 70 mph go to 18 mpg. Fig. You can make a difference: Î Make fuel consumption an important consideration when you buy a new vehicle. Ford Falcon LPG fuel economy consumption was 12.3L/100km LPG mileage vs petrol mileage of 9.9L/100km, in a real world test of LPG fuel economy consumption. This does not represent a big difference in fuel consumption per power unit between most normal naturally aspirated diesel engines, while turbocharged engines are not significantly better. By Ané Theron. Example a car uses 65 litres to travel 500km. It is the idle condition of the Diesel Generator Set. 8, Fuel Cons = 0.2525 × Speed2 – 1.6307 × Speed, where Fuel Cons is the fuel consumption of the main engine per day, and Speed is in knots. distance 200 km. You burn 135 kgs of fuel per hour.How much do you burn in 12 mins? 0 – 30 km/h (0 – 18.64 mph): For velocities below 30 km/h the fuel consumption is quite high (above 8 l/100km – 29.34 mpg). speed/fuel consumption, governor control as well. You are left with cons1/cons2=(v1/v2)3. For 4-stroke engine EXP=1.7. 1: The relationship between engine speed and fuel. CP Speed: about 14.0 Knots. To calculate BSFC, use the formula = where: is the fuel consumption rate in grams per second (g/s) is the power produced in watts where = (W) is the engine speed … The formula for converting this to mpg is 235.215/ ( L/100km) so 235.215/ (7 L/100km) = 33.602 mpg. or in other words for one unit of electricity generation fuel consumption will be 238 gms. To approximate consumption at lower throttle settings, use this formula: (GPH@WOT) * ( (RPM/WOT)^EXP ) For 2-cycle engine EXP= 1.5. In this minimum amount of brake specific fuel consumption in all loads rpm1200 quickly obtained. Yes, it’s a V8, but the consumption curve is the same for a V6. Unfortunately this speed range is typical for cars circulating in a city – urban environment. This Rules would be perfectly correct for an electric car. Most modern trip computers will record, calculate, and display the distance travelled, the average speed, average fuel consumption, and instant fuel consumption. To calculate the actual efficiency of an engine requires the energy density of the fuel being used. Different fuels have different energy densities defined by the fuel's heating value. That engine speed, combined with an appropriate trim setting, lets you cover the most ground in the shortest time with the best fuel economy. However, to assess the total fuel saving on a voyage basis one has to take into account the added time it takes to sail a given distance due to lower speed, yielding a total fuel saving of approx. It can be assumed that a major portion of the designed operational speed range is proportional, and that for any two points within this range the specific fuel consumption is constant. Download and print scalable Fuel Consumption Chart! Since it measures the variation of the fuel mass in time, the fuel mass flow rate is also called the hourly fuel consumption. Using Scilab we can compute the in-use (real world) fuel economy for the vehicle and engine parameters presented above. : kgs Outline procedure of fuel consumption curve prediction. 1. The ground speed, item number 9 in Table 1, was calculated by dividing the traveled main distance with the steaming time. More so, the engine fuel consumption is per steaming time. Therefore] Formulas. Feel The Burn: The Fuel Consumption Equation - PassageMaker But in practical it will be around 3.8 to 4.1 unit/Kg of fuel or per unit electricity generation DG will consume 256 to 260 gm of fuel. The fuel economy formula used by this calculator is: FE = d / V. Symbols. The fuel consumption rate for many makes of Diesel Engines can be found in a range between 0.380 & 0.450 lbs/hp hour; 172 & 181 grams/hp hour; 231 & 243 grams/kW hour. Enter the total distance of the trip in any units. - 23% less efficient at 75 mph. 19%. These three items make it possible to calculate fuel consumption, range, and cruise speed. Knowing the fuel consumption of your … The power to push a car down the road varies with the speed the car is traveling. For transportation vehicles, it is common to use fuel economy interms of distance traveled per unit of fuel, such as kms per litter (kml). LPG costs about 50% less so you still save a substantial amount of money (about 40%) with LPG. Formula. : kgs: You have used 8 kgs of fuel in the past 30 mins.How much do you burn per hour? Additional fuel consumption tips 100 110 120 130 140 150 160 170 180 190 200 0 20,000 40,000 60,000 80,000 BHP (kW) SFC (g/(kWh)) SFC Container ship of 300m length Calculation-FOC and ship speed-10 Calculation of FOC in actual seas 0 20 40 60 80 100 120 Oh wait, if the speed limit were 85 mph people would really drive 90 mph. Fuel Consumption Chart. To convert the fuel consumption from [g/km] to [l/100 km] we need to take into account the density of the fuel. As a rule of thumb assuming that engine power follows the cube of speed, a displacement ship with 10% speed reduction reduces the power need (resistance) and coherent fuel consumption by 27%. Fuel consumption = (18.5/254) x 100 = 7.28 litres per 100km. So actually fuel consumption goes like $\vec F \cdot \vec v /|\vec v|$ and your fuel consumption should only scale like: $$F_0 + k v \sqrt{u^2 + v^2}.$$ A more accurate model is speed -power curve deficiency, where fuel consumption is only predicted through the relation between power/consumption and speed [10]. (65 X 100) ÷ 500 = 13. - which indicates a fuel consumption of 10 liter/100 km. Boat: 2008 Formula 240 Bowrider On the basis of the analysis above, fuel consumption estimations for the case ship can be based on the following regression formula, as shown in Fig. The example values are for. This means your car uses 7.28 litres to drive 100km. It’s important to keep in mind that driving at cruising speed and other variables may decrease or increase fuel consumption. The letter v represents the velocity of the car, and the letters a, b and c represent three different constants: And after merging 2 formula we have: r (fuel consumption)=BSFC×P=P/ ( … The car, in this case, has an average fuel consumption of 7.625 liters for this period of time. - 17% less efficient at 70 mph. Our pro posed performance curve , derived statistically from actual operational data, is more accurate, realistic and contemporary for ship performance analysis [11]. To calculate BSFC (Brake specific fuel consumption) use the formula: BSFC=r/P (where: r is the fuel consumption rate in grams per second (g/s) and P is the power produced in watts.) Use the chart below to estimate fuel efficiency. Many drivers adopt different driving modes to improve fuel consumption, such as acceleration mode, running speed, etc. fuel volume 20 liter. Therefore when you want to know fuel consumption per unit distance you need to multiply power by the time it takes per unit distance -- this is the inverse of the velocity. Hence specfic fuel consumption will be 4.2units/kg of fuel. - 28% less efficient at 80 mph. Bath Tub Curve INTERNAL COMBUSTION ENGINE (JA304)FUEL CONSUMPTION Vs SPEED OF ENGINESpecific fuel consumption is generally given in units of gm/kW-hr orIbm/hp-hr. (Litres used X 100) ÷ km travelled = Litres per 100km. In the example below, the Formula 240 Bowrider works best at 3,500 rpm. Cars are subjected to a continuous start … The following formula is used to calculate fuel consumption in litres / 100kms, the most commonly used measure of fuel consumption. Using an exponential factor gives a much better curve fit than using a linear factor. : kgs: You burn 18 kgs of fuel per hour.How much fuel will you need to travel 24 miles if you average a speed of 36 mph? - 8% less efficient at 65 mph. Fuel Volume Used. In 100% load torque, brake specific fuel consumption has the lowest, and reached its minimum in rpm 1200 speed. This is the average distance per unit volume of fuel performance calculated from the entered journey … On the same trip, it can be assumed that the ships' displacement is also constant. Progressive drivers are assessing their vehicle performance based on fuel consumption, not on top speed and quarter-mile time. The Toyota Camry returned 40.3 mpg at … Sponsored Links. Figure 4.1: Fuel Consumption vs Range of an A320 ..... 35 Figure 4.2: Fuel/Range vs Range Chart ... Breguet Range Equation, it will be called in this project Breguet Range Equation as well. To best understand this relationship between hull speed, engine speed, and load, and fuel burn, it is very helpful to create a speed and fuel consumption curve for your boat (and not from builder literature). But a Mechanical Car has to Consume Fuel in 4-stroke Engine to make its power, it needs perfect burning and perfect engine breath. P 1 P 2 9 Constant N E mode Constant P mode. Fuel Economy. : kgs: You burn 20 kgs of fuel per hour.How much do you burn in 30 mins? As expected, LPG gets less MPG but fuel economy must also consider the cost of the fuel. Today, most cars are issued with a nifty little piece of equipment called a trip computer. For petrol (gasoline) is 0.75 kg/l and for diesel is 0.83 kg/l. Airplane specifications generally include pieces of information about the range, cruise speed, and fuel capacity of a given airplane. Kilometre per litre. A good guideline for budgeting fuel consumption for normally aspirated diesel engines on a displacement vessel is 1 … Fuel consumption (highway) 5.9 L/100 km 5.4 L/100 km 6.4 L/100 km How can I help? Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Take the distance travelled and divide it by the litres used. where ρ fuel [kg/l] is fuel density. Petrol engines also rev higher and you can expect optimal fuel consumption to be somewhere between 3,500 – 4,500 rpm for outboards and 2,500 - 3,500 for inboards. But as the speed increases: - 3% less efficient at 60 mph. Additionally, if you want to find out how much liters of fuel the car has spent in this example: 4600 kilometers/100 (this is liters per 100 kilometers)=46 46 x 7.625 litres (average consumption)=350.75 liters of fuel. The fuel mass flow rate is measured function of the engine torque and engine speed. You can also calculate the cost of fuel to drive 100km. The only true way to measure fuel consumption is to have a fuel meter installed on your watercraft. Enter the total quantity of fuel used during the trip. Again the URL is below: ( ( (Engine Power*0.0005)* (1-Fuel Efficiency))*Gear Speed)+Light = Fuel drain/s (in %) Gear Speed is 1 for half speed and 2 for full speed. Î Buy only what you need. CP Fuel Consumption: about 24 mt.