What fuel consumption should a diesel heating boiler have? Fuel consumption at idle speed. How much per hour is considered normal? What does fuel consumption mean g kW h

The issue of diesel consumption is the most important one when purchasing special equipment with internal combustion engines.

Any device must initially be put on balance. In this case, the fuel is written off according to existing regulatory documents. However, for special equipment there are no clear indicators of consumption per 100 km. Manufacturers, on the contrary, set the consumption per unit of engine power.

To determine and accurately calculate the formula, you must clearly know all the necessary components:

• N is the engine power, measured in kW;
• t – fuel consumption time, that is, 1 hour;
• G – specific fuel consumption of the vehicle, g/kWh;
• % – percentage of machine load during operation;
• p – fuel density. For diesel, the density is constant and is 850 grams per liter.

Engine power is mainly determined in horsepower. In order to find out the power in kW, you need to look at the equipment documents from the manufacturer.

Specific fuel consumption is a measure of engine consumption information at specific loads. Such data cannot be found in documents about the equipment; they must be clarified upon purchase or from authorized dealers.

The main component in the calculation formula is the percentage of equipment load. It refers to information about internal combustion engine operation at maximum speed. The percentage is indicated by the manufacturer for each type of transport. For example, for some MTZ-based loaders, out of all 100% of the working time, the engine will work approximately 30% at maximum speed.

Let's return to specific consumption. It is expressed in relation to the fuel consumed per 1 unit of power. Thus, to calculate everything in theory, for the maximum value you need to use the formula Q=N*q. Where Q is the desired indicator of fuel consumption for 1 hour of operation, q is the specific fuel consumption and N is the power of the unit.

For example, there is data on the engine power in kW: N = 75, q = 265. In one hour of operation, such a unit will consume almost 20 kg of diesel fuel. With this calculation, it is worth remembering that the unit will not operate directly at maximum speed the entire time. Also, the calculation is carried out in liters, so in order not to translate everything according to tables and not make mistakes in the following calculations, it is necessary to use the improved calculation formula Q = Nq/(1000*R*k1).

In this formula, the desired result Q determines the fuel consumption in liters per hour of operation. k1 – is a coefficient indicating engine operation at maximum speed crankshaft. R is a constant value corresponding to the fuel density. The rest of the indicators remain the same.

Coefficient maximum work engine is 2.3. Calculated using the formula 70% normal operation / 30% operation at high speeds.

It is worth remembering that in practice, theoretical costs are always higher, since the engine operates at maximum speed only part of the time.

Calculation of fuel consumption of a walk-behind tractor

Many owners of summer cottages and not only them often wonder how it is possible to calculate the fuel consumption of a walk-behind tractor during a certain operation.

It is possible to calculate the gasoline consumption of a walk-behind tractor only during its direct operation. To do this, you need to fill the fuel tank of the walk-behind tractor to the maximum level with gasoline. Then you need to plow the land. Upon completion of plowing a certain area, it is necessary to measure the area of ​​the plowed area. After this, calculate how much fuel was spent on plowing this area. Likewise for all other types of work (potato harvesting, mulching, mowing, etc.)

This is calculated using electronic scales. Take a simple container of fuel and measure it specific gravity. Then the scales are tared. After this, you need to add gasoline to the tank to the previous level and be sure to put the fuel container back on the scales. Electronic scales will show the difference between fuel cans. This difference will be the final indicator of fuel consumption per area of ​​land on which the work was done. Unlike the first case with special equipment, here fuel consumption is measured in kilograms.

It is worth remembering that the operating speed of the motorized cultivator should be approximately from 0.5 to 1 km per hour of operation. Based on this, a general calculation of fuel consumption by hour is made. According to established standards, there is data from walk-behind tractor manufacturers on average fuel consumption per hour of operation. For low-power walk-behind tractors with a capacity of 3.5 hp. consumption ranges from 0.9 to 1.5 kg per hour of operation.

Medium-power walk-behind tractors consume an average of 0.9 to 1 kg/hour. The most powerful devices spend from 1.1 to 1.6 kg per hour.

Fuel consumption rates per engine hour for diesel engines

Diesel fuel consumption standards for special equipment are on average 5.5 liters per 1 hour of operation in simple transport mode. When excavating soils in the first or second degree, the consumption is reduced to 4.2 liters per 1 hour of work.

If you additionally load or unload these soils, then for all MTZ-based excavators the consumption will be equal to 4.6 liters per 1 hour of work.

Fuel consumption per hour of operation of MTZ tractors is a value that depends on the influence of many factors. Many owners of agricultural equipment believe that their machines exceed the fuel limit, and strive to find out the exact figure that would serve as a standard.

Surveys and debates on forums regarding the fuel consumption rate of MTZ 82 and MTZ 82.1 show that it is not possible to obtain an exact value; two identical machines operating literally a few kilometers from each other show figures that differ in liters per hour of operation.

The average MTZ fuel consumption rate for plowing is from 5 to 12 liters of diesel fuel per hour of operation.

It is clear that such a spread does not suit many people, so they prefer to use a special formula or table with standards when making calculations.

Fuel consumption per engine hour MTZ 82 - calculation formula

You can estimate the diesel fuel consumption when operating the Belarus 82 tractor in kilograms of the model by calculating it using the formula:

P - desired value;

0.7 - constant conversion factor of motor power from kilowatt hours to horsepower;

The average fuel density, determined by specialists from the Russian Ministry of Industry and Energy, is 0.840 kg/liter, so it is necessary to further multiply the resulting value by 0.84.

R - specific fuel consumption, measured in gkW/hour (can range from 220 to 260 gkW/hour, usually the number is indicated in the operating instructions or in technical description tractor).

N – engine power in horsepower.

Fuel consumption for MTZ 82 and MTZ 82.1 per hour can be determined as follows: P=0.7*230*75=12 kg/hour or 10.8 l/hour.

MTZ 82 fuel consumption per 1 hectare is calculated just as simply - you need to determine how much a hectare of land is cultivated in a particular case and multiply by this figure.

Remember that this figure is the ideal consumption, i.e. This is how a new tractor works with a precisely adjusted fuel system. In reality, this value is influenced by many factors, including random ones.

MTZ 82 - what affects fuel consumption per 100 km

The “average” fuel consumption can be increased by:

• Attachments, including those not designed for the power unit of the unit;
• Motor malfunctions;
• Malfunctions and malfunctions in the fuel system;
• Travel speed vehicle;
• Types of work performed - plowing, transporting heavy loads, and so on;
• Engine type - on models MTZ 82 and MTZ 82.1. can be installed power units D-240, D-243 and their modifications;
• Connection/disconnection all-wheel drive;
• Working in higher or lower gears, general style of driving the tractor;
• “Difficult” soils;
• Depth of tillage, soil moisture;
• Low quality fuels and lubricants;
• Weather.

You can reduce diesel fuel losses when operating Belarus MTZ 82 tractors by correctly setting the fuel system injectors, avoiding “aggressive” driving, and maintaining the tractor and attached/trailered equipment in good working order. technical condition.

The influence of many factors leads to the fact that the figure “jumps”, however, such “jumps” significantly complicate planning and control of fuel consumption.

As a guide, you can use the average fuel consumption values ​​for MTZ 82, 82.1 tractors, established in 2012 for the products of the Minsk Tractor Plant by the Ministry of Transport and Communications of the Republic of Belarus. These norms can be transferred to Russian reality.p>

Fuel consumption rate for the MTZ 82 tractor - average values

IN regulatory document The main options for using the Belarus MTZ 82 and MTZ 82.1 tractors are considered, provided they work on “medium” soils in acceptable weather conditions.

For vehicles with D-243 engines:

MTZ-82 with trailer PSE-F-12.5;

• transport mode - 7.7 l/machine-hour;
• transport mode (with the front drive axle turned off) - 7 l/machine-hour.

MTZ-82 with a PL-7 trolley and a Nokka hydraulic manipulator - 7.3 l/machine-hour. MTZ-82;

• transport mode with trailer 2PTS-4 - 6.8 l/machine-hour;
• transport mode with trailer 2PTS-4.5 - 7.0 l/machine-hour;
• transport mode with trailer 2PTS-5 - 7.5 l/machine-hour;
• transport mode with the Broadway Wasa 3000 sweeper - 11.0 l/machine-hour;
• transport mode - 5.5 l/machine-hour;
• sweeping with a brush - 4.3 l/machine-hour;
• snow removal with a blade - 6.6 l/machine-hour;
• snow removal with a blade and brush - 6.9 l/machine-hour.

MTZ-82.1 with watering machine MP-5A;

• transport mode - 6 l/machine-hour;
• pump operation 32-3A - 5 l/machine hour;
• pump operation NPO-60M2 - 4.6 l/machine-hour.

• transport mode - 5.5 l/machine hour;
• transport mode with trailer 2PTS-4 - 6.8 l/machine-hour;
• transport mode with trailer 2PTS-4.5 - 7.0 l/machine-hour;
• transport mode with trailer 2PTS-5 - 7.5 l/machine-hour;
• transport mode with trailer PSE-F-12.5V - 6.5 l/machine-hour;
• transport mode with trailer PST-9 - 8.0 l/machine-hour;
• transport mode with trailer PST-11 - 10.4 l/machine-hour;
• transport mode with the PTK-10-2 platform - 9.4 l/machine-hour;
• sweeping with a brush - 4.3 l/machine-hour;
• snow removal with a brush - 6.3 l/machine-hour;
• snow removal with a blade - 6.6 l/machine-hour;
• snow removal with a blade and brush 6.9 l/machine-hour;
• transport mode with wood waste shredder IDO-25 “Iveta” - 5.5 l/machine-hour;
• operation of the IDO-25 “Iveta” wood waste shredder - 4.8 l/machine-hour;
• woodchip production at the DDO installation - 3.6 l/machine-hour;
• work with a milling cutter - 4.2 l/machine-hour;
• work with a rake - 7.5 l/machine-hour;
• work with a flat cutter - 8.0 l/machine-hour;
• mowing grass with a KDN-210 mower - 5.7 l/machine-hour;
• removal of asphalt concrete sheet with FD-400S cutter - 5.8 l/machine-hour.

Winter has come and now many cars “start” according to the alarm time (banal programmable autostart). Also, many write that it is precisely because of such “warming up” that a large amount of fuel is wasted. That is, the expense for idle speed simply huge (growing by almost 50%)! BUT is this really so? How much does the car consume per hour with such idle warm-ups? Let's find out + as usual video version...

Of course, the colder it is, the more difficult it is for the car to start and operate for the first 3–5 minutes; then the system warms up and consumption drops. But it becomes clear that in any case there is a cost, but not as huge as many people write.

About the alarm

Alarm system with auto start, allows you to start the car for 5 - 10 minutes. Moreover, usually the default is 10 minutes, but you can set it to 5, on some alarms it’s 3 minutes.

You can put it like automatic start by time, for example:

• Will start before you arrive
• Or by time interval (every 2 hours),
• By temperature (warmed up - stopped - cooled down - started again).
• Well, of course, you can start it yourself from the window in the morning (this is if the car is parked in front of the windows).

The most common are points 1 and 4, and basically no one removes the factory settings; the machine “keeps on” for 10 minutes. (it is during this time that we will calculate fuel consumption below)

How much does it cost per hour?

We came to the most interesting part – measurements. It can take a long time to calculate consumption using formulas. BUT we will do it easier, we have an excellent diagnostic tool (which is installed in the OBD2 connector). Still, now modern “injection” cars are a bit like computers.

Well, of course, we have a plugin - “instant fuel consumption”, it is calculated in “liters per hour”.

I won’t tell you in detail how to connect it to the car (all this will be in the video version). I will also measure the average consumption per hour in my car – KIA OPTIMA 2.0 liters.

So, what happens - until the car is warmed up, the consumption fluctuates within 1.0 – 1.2 liters per hour (it was about -10 degrees Celsius outside). After 2 - 3 minutes, the system warmed up and the flow rate dropped up to 0.7 – 0.8 liters per hour

I also conducted experiments on cars with a smaller engine capacity, 1.4 - 1.6 liters. Their fuel consumption is warmed up engine approximately 0.6 - 0.7l , in the cold it will also be spend about 1l. at one o'clock . I think that this fuel consumption algorithm is regulated; after the system warms up to at least +20, +30 degrees, the control unit automatically reduces the fuel supply and the speed drops.

Of course, the lower the temperature outside, the longer the interval at higher speeds with a consumption of 1 liter per hour will be. For example, at -20, -30 degrees it will be approximately 5 - 7 minutes.

So how much does autostart consume?

It's not difficult to calculate here. We will take the standard case of “10” minutes before work, and “10” after the working day (why “10”, because rarely will anyone change the standard alarm settings for 5 minutes or less).

I will also take the flow rate at -10 degrees. Let me remind you that for the first 3 minutes it is 1 l/h

At -20 deg. 5 minutes. – 1l/h

At -30 deg. 7 min. – 1l/h

We have 60 minutes in an hour:

Then – 1000ml/60 = 16.6ml/min *6 = 100ml

As a result, at -10 degrees. Celsius (2.0 liter engine) - for two starts of 10 minutes each, consumes – 100 + 163 ml = 263 ml. OR ALMOST - 0.3 liters. It's up to you to decide whether it's a lot or a little.

Of course, a car with a smaller engine will spend a little less at idle. If we go the logical route, then let’s say the 1.6 liter engine is 20% smaller in volume than the 2.0 version. This means that it will consume 20% less at idle.

263ml – 20% = 210 ml.

Of course, if your engine volume is larger and the temperature is lower, then everything can be calculated for your conditions. As you can see, all this is quite simple.

Well, before concluding the article, I would like to say that not only the idle speed (of the engine), but also a bunch of other parameters affects it. For example, winter tires, oil thickness, snow on the roads, etc. Watch all about this in my video, I recommend it to everyone.

This is where I end, I think my article and video were useful to you. Sincerely yours, AUTOBLOGGER