What is a motor hour and why we need this parameter

What is a moto-hour and why this parameter is used

You can find out about the mileage of a car engine, ships, agricultural equipment, pump drives, diesel generators or other stationary devices powered by motors by estimating the true wear and tear of the unit. In determining the motor life, first of all, the engine hours are taken into account, since this parameter influences the indicators and recommendations for the operation of a specific model of vehicle or device. The measurement is the same for different units installed on the vehicle, as well as operating stationary. In view of the fact that the mileage indicated in kilometers does not reflect the actual picture of the wear of engine components, for a more accurate determination and are used moto-hours.

What is motorhour and why do you need it?

The information on the direct wear is important for monitoring the performance of the engine, for accurately determining the timing of maintenance, repair, replacement of consumables and structural parts, and so on. Exhausted life brings closer the time of maintenance work, so information about engine hours allows you to monitor the performance and indicates the need to replace consumables. Each engine has different characteristics, so there is no uniform norms of service in a strictly allocated period, in the technical documentation to the equipment manufacturer specifies the timing of replacement, but in reality they may vary depending on operating conditions.

What are engine hours

Engine hour is a unit for measuring the duration of engine operation, its reserve, taking into account all, including unstable factors. This parameter cannot be equated to one hour, in certain conditions it is equal, more or less than a normal hour. When calculating, the unit’s operating modes are taken into account, the tachometer counts exactly the crankshaft revolutions. Because there is no exact concept of motorhour, it is sometimes necessary to convert it to the usual astronomical hour, for example, in the case of maintenance planning.

How to write it correctly, moto-hour or moto-hour

If you always write correctly and do not make mistakes in the spelling of words, you should know that the abbreviation of “motor-hour” is written as “moto-hour”, “moto-hour” or “moto-hour”. Different dictionaries suggest different spelling, this is caused by the fact that according to the rule, abbreviated words of all types, which this term belongs to, should be written together, but if we consider complex units, in this case the word falls under an exception, so it is written with a hyphen. Linguists did not reach a consensus, and, despite the fact that the fused spelling is considered obsolete, according to the Dictionary of Abbreviations of the Russian language, as well as the Spelling Dictionary, “moto-hat” is spelled correctly. This type of abbreviations are also always written in lowercase letters.

How to calculate the number of hours

How to calculate moto-hours

Many people set the goal of calculations, figuring out what is equal to moto-hours to make calculations, for how long the potential of the engine will be enough. It is not easy to do, and in any case, the figures obtained will be relative. Methods of calculating engine hours can be different – from counting by hand with recording of engine operation indicators to the use of mechanical or electrical meters designed for this purpose, which gives more accurate data, allowing to control the degree of wear and tear. Depending on the method of accounting, the parameter may be equal or not to a standard hour. Engine hours are based on rated power, i.e. engine hours are equivalent to one hour at rated speed. At idle speed, there is less wear and tear and the value of moto-hours is higher. Under hard working conditions, it is vice versa, the wear increases (for this reason, if it is necessary to change oils and other consumables, you should not wait for the period recommended by the manufacturer). Thus, in order to calculate more precisely, what is equal to one moto-hour of engine operation, at lower revolutions the parameter is counted by the coefficient in the smaller direction. The calculations can also be adjusted according to the hourly fuel consumption, but a clear value can not be deduced.

It is easier to keep record of engine hours for units operating stationary with a stable crankshaft speed with minimum errors. For example, diesel generators that produce electric current with normalized parameters and frequency work this way. In such cases, it is possible to apply a manual counting system, keeping records of the time worked by the motor or to use a counter that starts when the motor is running, then the motor hour will be equal to the astronomical hour.

How to set the shock sensor in the car

With variable crankshaft speed, the task of calculating wear becomes more difficult. At high speeds, friction in the contacting pairs increases, and fuel consumption also increases. To take unstable factors into account and correctly calculate wear, tachometric metering is used. A revolutions counter is installed on the output shaft, and these readings are taken as the basis for determining the period of maintenance work, write-off of fuel, etc. It is not possible to precisely convert motor-hours into standard hours with this method of measurement, because a different number of motor-hours is accrued, directly depending on the engine speed.

How many engine hours in one hour

To find out the degree of wear of engine components, you need to calculate moto-hours. Conversion to real time is required for a variety of reasons, for example, for reporting, so many people care about the question of how to convert moto-hours into an hour. As mentioned above, a moto hour can both equate and differ from a standard hour. The difference is observed with different modes of operation of the power unit, that is, when the loads are too increased or minimal, there will inevitably be differences in the units of measurement. Using the following algorithm, it is easy to calculate the average value relative to the standard time:

  • Idle motor revolutions equate to one astronomical hour;
  • At moderate work, the number of rotations of the shaft increases by about one third, respectively the discrepancy in units will be the same one third of an hour, that is, under such conditions, 1 Mh will be equal to about 40 real minutes;
  • Higher loads lead to accelerated wear of the motor by about two-thirds, then 1 Mh would be about 20 minutes.

The counted minutes in one moto hour are not an exact value, this algorithm only allows you to roughly calculate the wear of the machine, taking into account the intensity of the loads. The difference from the real hour will always occur in case of unstable factors. Do not forget that the results of calculations will be different for a diesel and gasoline engine, because the first is more powerful (that’s why it is more often used in agricultural machinery) and performs tasks for a shorter time interval.

How to calculate the number of motorhours

How to translate motor-hours into kilometers

Engine life is more correct to count in hours than in kilometers, but it is customary to indicate the mileage after which it is recommended to change oil and perform other work on the unit maintenance. Hence the next question, how many kilometers of mileage is 1 moto hour. Since the unit of measure Mh is relative, it is not possible to accurately calculate the number of engine hours worked by the number of kilometers “under the belt”, so the results will be relative. To make such calculations, the speed of movement and the degree of load on the power unit are taken into account. According to the Order of the RF State Customs Committee of 2.10.1996 № 609 “On the introduction of annual norms of consumption of motor resources (mileage) of vehicles, the average rate of one hour of the car, driven by a motor, not equipped with a meter of motor hours, will be equal to the following mileage:

  • Automobiles – 25 km;
  • Wheeled tractors – 10 km;
  • Tracked tractors – 5 km.

When driving in difficult conditions (driving at high revs, traffic jams, etc.) the number of engine hours increases and the mileage does not keep up with their countdown, so the recommendations for the maintenance specified in kilometers (for example, 15-20 000 km) are irrelevant. These manufacturer’s recommendations are more in line with the ideal operating conditions. This means that it is necessary to take into account parameters closer to reality, i.e. engine hours that show the actual wear and tear. Thus, most often you have to change consumables after half of the recommended mileage. Calculation of engine hours can be found in the technical documentation of the car, it is also possible to receive information using the onboard computer (for some models).

Tools for auto electrician from jtc.com.ua video instruction

How to convert motorhours to kilometers

What is the difference between moto-hours and machine-hours

We have already reviewed engine hours and it is clear that this unit is relative and indicates the time of engine operation, during which the crankshaft has made a number of revolutions, depending on the degree of load. Machine hour is a unit of working time of equipment used in calculations of costs for production of a certain product. This is a completely different concept and it is not possible to translate motor hours into machine hours and vice versa.

Using this parameter and special formulas, the productivity of equipment is calculated and the efficiency of its use is determined. For example, the concept of machine hours is often found in trucking (to adjust the process, the calculation of wages to employees) or in agriculture (then the calculations indicate the time spent on the performed work on cultivation, planting, etc.) Information about the full amount of work done is summarized, from preparation to the completion of the process. Having analyzed the situation, we can talk about the payback period of investments, efficiency and expediency of this or that equipment, profitability of production, etc.

How many kilometers in one moto-hours. Why counting engine hours and how they differ from machine hours.

What are engine hours



Engine hours are required in order to troubleshoot problems in time and to perform maintenance. When determining the service life of an engine, first of all the engine hours are taken into account, as this parameter affects the performance and recommendations for the operation of a particular model or device of the vehicle.

Engine hours how to count correctly and why this parameter is needed

The duration of engine operation is measured in units – moto-hours. This indicator is not equal to the usual hour. It is less or more than one hour under certain factors. The calculation is carried out, taking into account the mode of operation of the vehicle. The revolutions of the crankshaft are calculated with a tachometer. 1 moto hour does not have a precise definition of time. It can be converted to an astronomical hour by making a calculation. The moto hour is considered a special unit for determining the load of a running motor. It is equal to one habitual hour of crankshaft operation at moderate/no-load. In 60 minutes, the engine makes approximately 1,600 revolutions per minute. This figure is not equal to operating time, mileage. It is measured for small-cubicature vehicles, such as motorcycles, as well as for special equipment, the evaluation of which is not based on distance.

Simply put, a moto hour is one hour of engine operation at nominal speed. If the engine functions in different modes (highway, traffic jams, idling), it is difficult to make a calculation of such a parameter. There are modern German cars, which are already equipped with a meter of engine hours. This device itself signals the owner when it is necessary to change the oil. German cars are equipped, as a rule, with a turbine. The oil, passing through it, decreases its quality quicker. Therefore, its replacement is carried out by moto-hours. Other foreign cars do not have the specified counter.

Peculiarities of calculating engine hours

To perform the counting, you need to know how the unit is fixed. When the engine is started, the counter (electronic, mechanical) is activated, recording at what frequency the shaft rotates. The index is displayed on the indicator. Such a tool for calculating moto-hours makes it possible to determine the duration of its operation at any time interval. The calculation is based on the number of revolutions made by the shaft in one minute. The indicator turns out different when idling and under load. The hourly operating hours are counted to find out approximately how worn out the mechanical moving parts of the unit are. The formula for the calculation is simple, based on the number of revolutions.

How to calculate the number of motorhours

  • The most accurate one is based on the number of crankshaft revolutions. One moto hour corresponds to about 96,000 revolutions.
  • By the fuel used.
  • By time. This is approximately 1 hour of idling the engine.
Polishing headlights BMW E39 video instruction

Many users want to learn how to calculate MH (moto-hours). To implement the calculation is not so easy. Either way, the data obtained is relative. The meters allow you to get accurate data and estimate how worn out the engine is. The parameter may be equal to one real hour, or it may be different. But in any case, one moto hour is equated to 1 hour of engine operation at idle speed.

Why do you need to count engine hours

The number of hours you’ve logged will help you find out how much you’ve used up. The more hours have been measured, the sooner the day will come when it will be necessary to change consumables (for example, oil change in the steering system) and do maintenance. After the necessary manipulations the clock will be renewed and the countdown will start all over again. Therefore, knowing about the operating hours gives you the opportunity to control the indicators, indicates the importance of replacing parts. Each power unit has different characteristics. There are no uniform standards for maintenance in a strictly defined period of time. The manufacturer indicates the conditions for replacement in the technical documents of the equipment. In fact, they may vary depending on operating conditions. It is possible to calculate engine hours in the ways mentioned above. There are modern devices that allow you to accurately calculate the engine hours. Their operation makes it possible not to calculate the index by formula. A special sensor displays the parameter.

How many engine hours in one hour

One moto-hour is not equal to an astronomical hour. The number of engine hours depends on the number of crankshaft revolutions per hour at different loads. You can relate the required parameter to the standard hour by applying a simple formula.

  • At idle engine speed, the number of engine hours is equal to 60 minutes (1 astronomical hour).
  • At moderate load the number of revolutions is increased by one third. Then 40 minutes corresponds to 1 motohour.
  • If the loads are increased, then 20 minutes of real time is 1 motohour.

Applying this algorithm, you can easily convert motor-hours into hours. It is not possible to determine the exact value. The formula makes it possible to calculate engine wear and tear, taking into account the loads. There will always be factors that will cause a difference with the actual time. The results of the calculation will be different for gasoline and diesel engines. The second is considered more powerful, so it is used in agricultural machinery. It performs a given amount of work in less time.

The difference between moto-hours and machine-hours

Engine hours and kilometers

The unit of measurement that determines the time of the engine is considered to be a moto-hour. It shows how many revolutions the crankshaft was able to perform in an hour. In contrast, the machine hour indicates how much time was spent making the product. The indicator is needed to determine the productivity of the device. Thus, engine hours and machine hours – the difference in these concepts is obvious. They have nothing in common with each other. It is impossible to translate motor-hours into machine-hours for this reason.

Machine hours reflect the amount of time needed by one unit of machinery to perform a certain amount of work. For example, if a car cleans the street of snow for 7 hours, it is said to have worked 7 machine hours. This parameter is important for the fleet. Specialists calculate the load, and plan trips of machinery. Thus, machine-hours define in general the amount of work of special equipment, and motor-hours measure the exhausted resource of the motor.

How to calculate engine hours for construction equipment

Previously, this indicator was calculated only for construction and agricultural equipment. This is explained by the fact that knowing the mileage, it is impossible to know the real condition of components. It is possible to find out the degree of their wear and tear with the help of moto-hours. There are different counters for different vehicles. The algorithm is based on the fact that a construction vehicle idles for one hour of real time working 1 moto-hour. It is accelerated by one-third under normal load. Then one moto hour corresponds to 40 minutes. If the machine is under heavy load the engine wears down even faster. If a meter is used, maintenance is planned in a timely and correct manner. For construction equipment, various sensors have been developed. It all depends on the device they monitor. All types of counters are based on time counting. The difference lies in the beginning of the counting. There are sensors triggered by vibration, switching on, etc. Use electronic and electromechanical hour meters.

How does the prechamber diesel engine work

How to count motor-hours on a tractor

For users of agricultural machinery, the concept of moto-hours is of great importance. There is a special sensor in the engine to measure it. It is triggered after every full hour of operation. This is how the mileage of the agricultural machine is monitored. This makes it possible to determine the degree of engine wear. The hour meter on the tractor is a counter which is activated from the moment the engine is started. The counter can be mechanical or electronic. The device monitors the shaft speed, the data is transmitted to the indicator. This allows you to set the duration of engine operation for a specific time. The main role here is given to the crankshaft revolutions per minute. The moto-hours of the tractor are not equal to one real hour. By determining the engine hours, the specialist will know how worn out the engine mechanisms are.

This is found out by using the formula:

  • One hour of engine idle time equals one hour of real time.
  • One moto-hour of engine work in standard mode is equal to 40 minutes of real time.
  • A motor hour of heavy loads equals 20 standard minutes.

The main components of the meter include an engine operation mode indicator, a time sensor, and a recorder. Simple tractor engines are equipped with mechanical counters. They are connected through a gearbox. Such devices calculate the operating time by the number of revolutions. Tachometer meters are considered the most acceptable. They take into account the number of working hours and the load on the motor.

Tractor Running Hours

Why do we need and what is the usefulness of moto-hours for a biker?

It is necessary to know this parameter in order to calculate the interval of functioning of the bike. To measure it, a sensor is used, which is triggered hourly. Finding out the number of moto-hours, the biker will calculate the percentage of wear of the working parts of the motor. It is better to perform their translation into kilometers. Then you can find out how much fuel the motorcycle needs. There is no single formula for determining the kilometers. In order to calculate it, you need to look at the technical documents for the device.

How to translate motor-hours into kilometers

There is no exact formula for translating the parameter into kilometers. Mths in km for passenger cars are calculated as follows: 1 unit is equal to 12-14 km of driving at a quiet pace at a moderate speed. In practice, to replace oil and other consumables standard interval is considered a distance of 15 thousand kilometers. If the conditions change: driving is aggressive, bad roads, towing, transporting cargo, the moto-hours go much faster. Their number exceeds the mileage, if the car often idles or moves on busy roads. It turns out the resource consumption when the car is standing still. It is better to convert hours into kilometers and be guided by them, not by the mileage. This will enable you to replace consumables in time.

It is important to translate motor-hours into kilometers for those drivers, who work far from the points of specialized help (extreme recreation, forest area, etc.). This way they can prevent a breakdown in time. If you can not rely on the mileage, it is better to set the counter. Features of the translation of MF in km depends on the specific enterprise. There are agricultural companies which equate one moto hour with a distance of 16 km. Others take 20 km for 1 MH. The type of work is decisive for the calculation.

How to Determine Oil Change Time by Engine Hours

Motorists are guided by the average indicator: every 10-15 thousand km it is necessary to change the oil. Specialists recommend relying not on the mileage, but on moto-hours. It shortens the interval between changes by half. Certain oils should be refreshed after a certain amount of time, even if the car has low mileage. Otherwise, engine wear will be high, as the protective qualities of the lubricant are lost.

What is the difference between overtaking and beating on the road

The following types of oils are used:

  • Mineral. They are to be changed after 150 MH (moto-hours).
  • Semi-synthetic. Replacement is done after 250 MH.
  • Synthetic. Change after 250-350 MH.

It is not recommended to exceed the specified limits, as lubricant loses its properties. Exceeding hours threatens engine wear. It will not work for a long time. Car owners necessarily need to determine the mh hour to prevent breakdowns.

Design and principle of operation of devices for measuring engine hours

The meter helps to calculate the time of engine operation. After a certain time, it beeps or turns on a relay. The counter enables timely maintenance, routine replacement of parts, repairs. The counter continuously counts the time as long as it is on. When it is turned off, the counting stops. When it is turned on again, it counts from the extreme value, not again. The MF meter keeps track of reserves. It measures the available service life of the motor and monitors the moment of its maintenance. Using such a device, the car owner can monitor the performance of the engine. As a result, it reduces costs, minimizes downtime.

Running Hour Counter

Features of hour meters and ways to use them

The counter counts seconds, minutes. When the hour ends and its value approaches 59.59, one unit is added to the hour, seconds and minutes go from 00.00. When the hour meter reaches the critical value, the alarm sounds. In this way, the device informs the owner of the need to monitor the condition of the engine.

Types of hour meters:

  • Non-resettable. Counts the operating time of the equipment from one second to 9999 hours. Does not reset.
  • Resettable. Counts from one second to 9999 hours. Can be reset.

The design and qualities of meters are different. The devices available on the market are divided into groups according to their functionality:

  • Electronic.
  • Mechanical.
  • Electromechanical.
  • Digital.

The classic device is considered to be a mechanical one. It is made on the basis of a mechanical spring clock with automatic winding. Works when the motor is running. Counters of this type are used rarely, as they were replaced by modern convenient devices. Electromechanical counters are considered more reliable, accurate, simple. They have not lost their relevance for many years. They include an electromechanical unit. Quartz resonator counts the hours. In contrast to these devices, electronic counters have a recorder (indicator). Usually it is an LCD display. They are characterized by compact size, reliability. Using an electronic device, the user must protect the readings and store the data.

New modern meters are digital. They not only record the operating time, but can monitor other indicators. The design is based on a microcontroller. A digital device can be programmed for specific needs. Such a device needs to be protected against data resetting.

The functionality of the MF meters also varies. Their functionality can be basic. Then the device only counts the time of the motor, without taking into account other parameters. The device can register tachometric information, the temperature of the exhaust gases. Some models are equipped with an alarm, which is triggered when the time is built up.

How the hour meter works

The device is operated according to the manufacturer’s instructions. If the hour meter is professional, it is installed, adjusted by qualified specialists. Household devices are used on a simple principle. They are available for use. Periodically, the owner should check the device. If a malfunction occurs, the meter is replaced or repaired. The apparatus must be protected from liquids, falls, and shocks. If the operation is correct, it works for many years.

The functioning of the counter is simple. The clock mechanism turns on when the motor starts. All readings are shown on the indicator. If the engine is stopped, the operation of the device is terminated. For this reason, the operating time is recorded only when the engine is running. The device counts m-hours in the way provided by its design.

( No ratings yet )
Like this post? Please share to your friends:
Leave a Reply

;-) :| :x :twisted: :smile: :shock: :sad: :roll: :razz: :oops: :o :mrgreen: :lol: :idea: :grin: :evil: :cry: :cool: :arrow: :???: :?: :!: