The choice of the required camshaft should be started with the adoption of two important decisions:
First, let's check how we define the working range of revolutions, and how the selection of camshaft is determined by this choice. Maximum engine speed is usually easy to highlight, since they directly affect reliability, in particular, when the main parts of the block are usual.
Maximum engine revolutions and reliability for most engines
| Maximum engine speed | Estimated working conditions | Expected service life with relevant details |
| 4500/5000 | Normal movement | More than 160,000 km |
| 5500/6000 | "Soft" forcing | More than 160,000 km |
| 6000/6500 | Approximately 120,000-160,000 km | |
| 6200/7000 | Forcing for everyday ride / soft races | About 80,000 km |
| 6500/7500 | Very "hard" street riding or racing from "soft" to "hard" | Less than 80,000 km with street riding |
| 7000/8000 | Only "hard" races | Approximately 50-100 checks |
Keep in mind that these recommendations are common. One engine can hold much better than the other in any category. How often the engine is accelerated to maximum revolutions is also very important. However, in quality general rules You need to be guided by the following: Maximum engine speeds must be below 6,500 rpm, if you create a forced engine for everyday ride, and it is required reliable work. These engine speeds are common to most parts for the limits and can be obtained using valve springs of medium-sized effort. Therefore, if the main goal is reliability, then the maximum turns of 6000/6500 rpm will be a practical limit. Although the decision on the maximum required revisions can be a relatively simple process, in principle, based on reliability (and, maybe at cost), an inexperienced engine designer may consider the definition of an engine speed range a much more complex and dangerous task. Lifting valves, duration of clocks and cam profiles distribution Vala. Power range will be determined, and some inexperienced mechanics can succumb to choose the most "large" from possible camshafts in attempts to increase maximum power Engine. However, it is important to know that the maximum power is necessary only for a short time, when the engine develops maximum turns. The power required from most of the forced engines is much lower than the maximum power and number of revolutions; In fact, a typical forced engine can "see" full opening throttle valve Only a few minutes or seconds for a whole day of work. However, some inexperienced engines ignore this obvious fact and choose camshaft more by intuition than guided by? If you suppress your desires and make a thorough choice based on real facts and opportunities, then you can create an engine capable of issuing impressive power. Always keep in mind that the camshaft is largely a compromise detail. After a certain point, all increases are given by the price of power on low revolutions, loss of pickup, efficiency, etc. If your goal is to increase the number horse power, First, make modifications that add maximum power by improving the efficiency of the intake, since these changes have a smaller effect on the power at low revs. For example, optimize the streams in the cylinder head and in the exhaust system, reduce the stream resistance in the intake manifold and in the carburetor, then install the camshaft in addition to everything above the specified "set". If you use these techniques thoughtfully, the engine will produce a wider power curve, possible for your time and money investments.
In conclusion, - if you have a car with automatic transmissionYou need to be a conservative when selecting the phases of the camshaft gas distribution. Too much valve opening duration will limit the power and torque of the engine at low revs, which are necessary elements in ensuring good overclocking and touching the car. If your car's torque converter (hydrotransformer) of your car stops at 1500 rpm (a typical value for many standard transmissions), then camshaft, which is an outstanding torque, although not necessarily the maximum power, at 1500 rpm will provide good overclocking. You can give in temptation to use a hydrotransformer with high stop turnover and camshabked with a large duration of the valve opening in attempts to achieve better results. However, if you use one of these torque converters in the usual motion, then their efficiency on low revs will be very low. Fuel efficiency will suffer quite strongly. For everyday car, there are more efficient ways to improve acceleration from low revs.
Let's summarize the basic elements of the camshaft selection. First, for everyday driving, the maximum engine speed should be maintained at a level not exceeding 6500 rpm. Turns exceeding this limit will noticeably reduce the service life of the engine and increase the cost of parts. Although the "ordinary" engine can benefit from the larger valve as possible, the valve lifting value will reduce the reliability of the engine. For all high-rise camshafts, the bronze guides of the valves are a necessary element to ensure a long service life of the sleeve, but for lifting valves of 14.0 mm and more even bronze guide bushings cannot reduce wear to a level acceptable for ordinary applications.
The longer the valves hold open, especially inlet valveThe greater maximum power will produce the engine. However, due to the changeable nature of the phases of the camshaft gas distribution, if the duration of the valve opening or the overlap of the valves will switch to a certain value, all additional maximum power will be obtained by the quality of the quality of work on low revs. The camshafts with the duration of the intake tact up to 2700, measured at zero valve rise, are good replacement for standard camshafts. For high-fisted engines, the upper limit of the duration of the intake clock is more than 2950 is the affiliation of a purely racing engine.
The overlapping of the valves causes some loss of torque on low revs, however, these losses decrease when the overlap is carefully selected for a specific application - from about 400 for standard engines for up to 750 or more for special applications.
The duration of the opening of the valves, the overlapping of the valves, the gas distribution phases and the corners between the centers of the cams are related to each other, it is impossible to configure each of these characteristics independently on the engines with one camshaft.
Fortunately, most camshaft processing specialists spent many years to create cam profiles to provide power and reliability, so they can offer camshaft well-suited to your requests. However, do not perceive blindly what masters offer you; Now you have the necessary information for a competent discussion of the features of camshafts with their manufacturers.
In the end, camshaft is one of the parts of the inlet system. It must be combined with the head of the cylinder block, the intake manifold and the exhaust system. Volume intake manifold And the size of the exhaust manifold pipes must be selected so as to match the engine power curve. In addition to this, the air flow rate in the carburetor, the number of cameras, the type of activation of the secondary chamber, etc. also have a noticeable effect on the power.
Setting up a carburetor chainsaws with your own hands
For self-option, the carburetor needs to be familiar with its device and understand the order of work that are carried out to adjust the details responsible for the correct functioning. component parts Devices and close to it details.
It is necessary to accurately handle items for the system option, also to determine the compliance of the characteristics of the characteristics of very valid values.
About the device carburetor
The carburetor is used to mix the fuel consistency with air while compliance with the advanced proportions. If clear doses are not respected, the serviceability of the motor is under danger. When the component receives a huge amount of air during mixing, and the fuel is not enough, this mixture is considered "poor".
It is impossible to allow oversaturation, because with a larger amount of fuel by comparison with air, malfunctions or wear of the motor are also likely. The adjustment of the carburetor is needed not only before initial implementation, and when any differences are detected in its work. Before you start working with chainsaw, do not forget to hold it.
Composite parts carburetor
The design of the carburetor contains standard set Parts, but may be able to change depending on the manufacturer. Components:
- The foundation. This is a special tube that is visually similar to the aerodynamic design. Air passes through it. In the transverse direction in the middle of the tube there is a damper. Its position can be changed. The more it is put forward in the pass, the less air enters the engine.
- Diffuser. This is a closed part of the tube. With it, it increases the speed of air supply precisely in that segment, where the fuel comes from.
- Channels For fuel supply. The fuel mixture is contained in the float chamber, then passes into the jaw, from which it flows into the sprayer.
- Float camera. It is a separate structural element, resembles the form of a tank. Designed to continuously maintain the optimal level of fuel fluid before entering the channel, from where the air comes from.
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What you need to have to configure
Each owner of the carburetor must be required tools To adjust this system. There are three adjusting screws that are located on the device housing. They have their own markings:
- L - Screw to correct low revolutions.
- H is a screw for adjusting high revs.
- T - carries out regulation idle moveIn most cases, it is used for experiments.
Air filter chainsaws
Before adjusting the carburetor, you need to prepare the device:
- The engine warms up, that is, it starts in about 10 minutes before repair, and it turns off when started (see how to start a chainsaw).
- The air filter is checked and washed.
- The circuit stops using the rotation of the screw T to the stop (see the chain oil).
To implement a safe repair, you need to prepare a flat surface where you can neatly arrange the device, and the circuit is unscrewed in the opposite direction. Need a tachometer. It is determined by the presence of a violation in the work of the carburetor. When screw rollers, the sound should be perfect and absolutely smooth. If you are noticed notes, it means the mixture is oversaturated.
Instructions for setting
The adjustment of the carburetor is divided into two main stages. The first is called basic. It is performed with the engine on. The second is running when the engine is heated.
To carry out the procedure for setting the carburetor successfully, you need to read in advance with the instruction manual specific model to identify additional features Device settings.
First stage
Adjusting screws of the highest and low revolutions should be held clockwise until the highest resistance is met. When the screws reach the stop, you need to translate them into reverse side And leaving 1.5 turns when passing.
The main stage
Chainsaw Stihl 180 Check How much turns turns
In this video, we will answer the question of how to customize or adjust the carburetor chainsaws do it yourself
Chainsaw Stihl 230 Check How much turns turns
Carburetor adjustment chainsaws Champion 254 do it yourself. The initial adjustment of the carburetor is shown
The engine is turned on at the average turnover and it warms up for about 10 minutes. The screw that is responsible for adjusting the idling should move clockwise. It is released only when the engine arrives in the stable functioning mode. It is necessary to control the chain during this process did not move.
In idling mode, the engine can stumble (the reason is here). In this case, it is necessary to immediately bring the adjusting screw clockwise until it stops. Sometimes the chain begins to move. In this case, you should twist the adjusting screw in the opposite direction.
Checking the acceleration
Need to perform a small study. The acceleration of the device is initiated. It is necessary to estimate the serviceability of the engine during the maximum revolutions. When the engine functions correctly, then when you press the accelerator, speed increases to 15,000 rpm.
If this does not occur or an increase in the speed is too slow, it is necessary to apply the screw marked with the letter L. It turns counterclockwise. Moderate movements must be observed, since the rotation cannot be more than 1/8 from the complete circle.
Maximum number of revolutions
To limit this indicator, you need to use a screw with Marking H. To increase the number of revolutions, turn it clockwise, and to reduce them in the opposite direction. The maximum frequency should not exceed the value of 15000 rpm.
If you make this indicator more, the engine device will work for wear, which will lead to problems in the ignition system. When the screw is rotated, the device ignition processes should be taken into account. If the slightest failures appear, then the maximum value of the revolutions must be reduced.
Final inspection at idle
Before this procedure, it is necessary to complete the full adjustment of the components of the carburetor when working at maximum turns. Next, check the functioning of the device in idling mode. When the correct parameters are achieved when adjusting, you can see accurate compliance of the carburetor design to such criteria:
- When connecting the idle cold mode, the circuit does not move.
Accelerator Chainsaw
- When even a small pressing of the accelerator is carried out, the engine at an accelerated pace is gaining momentum. With a gradual recess of the press, it can be noted that the engine speed is contractedly increased by reaching the maximum allowable values.
- When the engine is running, you can compare its sound with a four-stroke device.
If violations are noted in the above parameters or adjusting the device was not implemented in fullYou need to perform the main setting step again. Sometimes actions are incorrect. In this case, the device may fail due to the loss of the correct node settings. In this case, you will have to turn to a specialist.
Disassembling the carburetor if necessary for checking or repairing components
Device different models Carburetors are almost the same, so when working with them you can use the standard scheme. All items need to be removed carefully, and then lay outSo that you can successfully arrange objects at the place at the end of the repair work.
Read:
Removing the top cover
- The top cover is removed. To do this, unscrew 3 bolts, sticking it in a circle.
- Foam rubber is also removed because it is the top part of Air filter.
- The fuel hose is removed.
- Drive drive is displayed immediately on them.
- The tip of the cable is disconnected.
- The gasoline hose can be completely removed if it is planned to pull it from the fitting.
To finally prepare a carburetor to overhaul or replace the smallest details, it is necessary to disconnect it carefully from the main system.. Sometimes its further disassembly is required. You should unscrew the composite elements carefully and fold fasteners by groups, since these small parts are easily lost.
Instructions for Chinese
To properly configure the carburetor of Chinese chainsaws, you must first remember the factory settings of the device, then turn on the engine. Subsequently, you will have to leave it for several hours to accurately set your own parameters. Sometimes work is performed once after a ten-minute engine functioning, but many Chinese-made models require special circulation.
Chinese model chainsaw
Adjustment order:
- Events begin in idle mode. With the help of adjusting screws, it is necessary to achieve a planned set of speed by the engine, so you should first give it to work on small turns. Deviation from the norm is to move the circuit over the bus. In this case, you need to adjust the optimal position to the extreme screws so that the chain remains fixed.
- The transition to the revolutions of the average speed. Sometimes the engine smokes. This defect can be eliminated if you spin the screw to feed the boil fuel mixture.
In this case, the smoke will disappear, but the speed of engine revolutions will increase. You need to adjust the settings until the level is reached when the engine is pressed smoothly in smoothly, sharp jerks or interruptions are not heard.
The characteristic of the TRD by the number of revolutions is curves that show the change in thrust and specific fuel consumption when changing the number of revolutions (at constant speed and flight height).
The characteristic of the number of revolutions is shown in Fig. 41.
When changing traction by revolutions, the following main modes of engine operation are noted:
1. Small gas or number of idle speed. This is the smallest number of revolutions, in which the engine is running steadily and securely. At the same time, stable combustion occurs in combustion chambers, and the turbine power is quite sufficient to rotate the compressor and the units.
For a TRD with a centrifugal compressor, the number of nozzles is 2400-2600 per minute. Engine thrust at idle does not exceed 75-100 kg.
Embedded idle speed specific consumption fuel is not a characteristic value; There is usually a clock consumption of fuel.
In the numbers of idling, the turbine operates in severe temperature conditions, in addition, the oil supply to the bearings is very small. Therefore, the time of continuous operation on a small gas is limited to 10 minutes.
2. Cruising mode - the engine operates in speeds, at which the thrust is approximately 0.8 r Max.
Fig. 41. Characteristics of the TRD by the number of revolutions.
With these revolutions, continuous and reliable engine operation is guaranteed during the established service life (engine resource).
The designer is as follows the parameters of the engine (ε, t , Efficiency) to get the smallest specific fuel consumption in cruising mode.
The cruising mode of operation of the engine is used when flying for duration and range.
3. Nominal mode - the engine operates in speeds, at which the thrust is approximately 0.9 r Max.
Continuous work on this mode is allowed no more than 1 hour.
On the nominal mode, a set of height and flights at elevated speeds are made.
According to the nominal regime, the thermal calculation of the engine and the calculation of parts for strength is made.
4. Maximum (takeoff) mode - Engine develops maximum number The revolutions at which the maximum thrust r Max is obtained - in this mode, continuous operation is allowed not over 6-10 minutes.
The maximum mode is used for take-off, set of height and short-term flight at maximum speed (when you need to catch up with the enemy and attack it).
The characteristic of the number of revolutions is built under standard atmospheric conditions: air pressure R o \u003d 760 mM.rT. Art. and temperature T 0 \u003d 15 0 S.
Fig. 42. Changing the specific fuel consumption by the number of revolutions.
With an increase in the number of engine speeds (at constant height and flight speed), the second air flow rate through the engine G s and the compression ratio of the compressor is ε comp. As a result, the engine is sharply growing and the specific fuel consumption is reduced, the TRD is more economical on large numbers of revolutions. If the specific consumption of fuel at maximum turnover is taken for 100%, then the specific fuel consumption on idling turnover will be 600-700% (Fig. 42). Therefore, it is necessary to completely reduce the work of the TRD on idle turnover.
5. Fast and Furious. For engines with an forced chamber, the characteristic also specifies the thrust, specific fuel consumption and duration of the engine when the floors is turned on - the forple chamber.
When the TRD is started, the initial wave promotion to the idle speed is made by auxiliary starting engine.
As a starting motor, electrical starters, starter generators, turbojet starters are used.
Electric starter It is an electric motor direct currentFed of current from aircraft or airfield batteries during startup. The power of it is about 15-20 liters. with.
On some TRD, the generator starter is installed, which runs as an electric motor at startup, and during the engine operation, it works as a generator - nourishes the aircraft network.
Electric starter, or starter generator, turns on in automatic system launch, and his work is consistent with the work of start-up fuel system and ignition systems.
The turbojet starter represents auxiliary turbojet engine installed on powerful TRD.
A small electric motor launches a turbojet starter that spins the main engine to idling turns and automatically turns off.
September 13, 2017.Engine operation mode is one of the main factors affecting the rate of wear of its parts. Good when the car is equipped automatic box Or a variator, who choose the moment of transition to the highest or lower transmission. On machines with "mechanics" the driver is engaged in the switch, which "spins" the motor in its intelligence is not always correct. Therefore, motorists without experience should be explored, on which revolutions it is better to ride in order to maximize the resource of the force aggregate.
Movement on small thoughts with early switching
Often the instructor driving schools and old drivers recommend newcomers to drive "in the tension" - to move on higher transmission Upon reaching 1500-2000 rpm crankshaft. The first give advice for security reasons, the second - in a habit, because there were low-speed motors on cars. Now this regime is suitable except for a diesel engine, whose maximum torque is in a wider range of revolutions than that of a gasoline engine.
Not all cars are equipped with tachometers, so in low-extreme drivers with this style ride worth navigating the speed of movement. The mode with early switching looks like this: 1st Transfer - Movement from the place, the transition to II - 10 km / h, on III - 30 km / h, IV - 40 km / h, V - 50 km / h.
A similar switching algorithm is a sign of a very calm driving style that gives an undoubted security advantage. Minus - to increase the wear rate of the details of the power unit and that's why:
- Oil pump reaches rated performance from 2500 rpm. Load at 1500-1800 revolutions causes oil starvation, especially suffer connecting rod bearings Slides (liners) and compression piston rings.
- Conditions of burning fuel and air mixture far from favorable. In the chambers, on the plates of the valves and the bottoms of the pistons is plugged with the Nagar. In the process of work, this soot is spinning and flammifies the fuel without a spark on the ignition candle (the effect of detonation).
- If you need to dramatically increase the engine speed when the edges of the very "bottoms", you click on the accelerator, but the acceleration remains sluggish until the motor reaches its torque. But as soon as this happens, you turn on the highest transmission and the rotational speed of the crankshaft drops again. Load large, lubricant is not enough, the pump is weakly pumping the antifreeze, overheating occurs.
- Contrary to popular belief, gasoline saving in this mode is absent. Pressing the gas pedal fuel mixture It is enriched, but it burns not completely, it means that it is being consumed.
Auto owners equipped with on-board computerIt is easy to see in the uneconomicality of the movement "in the tension". It is enough to turn on the display of an instant fuel consumption.
Like a ride manner rapidly wear out force aggregatewhen the car is operated in heavy conditions - on the ground and country roads, with a full load or trailer. It is not necessary to relax and the owners of the car with powerful motors The volume of 3 l and more capable of sharply accelerated from the "bottoms". After all, for intensive lubrication of the driving parts of the engine, you need to hold a minimum of 2000 rpm of the crankshaft.
What is the harmful to the high speed of the crankshaft?
The driving on the Sneakers to Paul ride implies the constant spout of the crankshaft to 5-8 thousand revolutions per minute and later switching speeds when the engine is literally rings in the ears. What is fraught with a driving style, except to create emergency situations on the road:
- all the knots and aggregates of the car, and not only the motor, experience maximum loads during the service life, which reduces the total resource by 15-20%;
- due to the intensive heating of the engine, the slightest failure of the cooling system leads to overhaul due to overheating;
- pipes of the exhaust path go much faster, and together with them - an expensive catalyst;
- the transmission elements are accelerated;
- since the rotational speed of the crankshaft exceeds the normal turns, without twice, the fuel consumption is also increased by 2 times.
Operation of the car "On the gap" has an additional negative effect associated with quality road coat. Movement by high speed In uneven roads literally kills the elements of the suspension, and in the shortest possible time. It is sufficient to fly the wheel into the deep pothole - and the front stand will bend or crawls.
How to ride?
If you are not a car drivers and an adherent of a "lantya" ride, which is difficult to vote and change the driving style, then to save the power unit and car as a whole, try to keep engine speeds in the range of 2000-4500 rpm. What bonuses you will get:
- Mileage before overhaul Motor will increase (the full resource depends on the car brand and motor power).
- Thanks to the combustion of the fuel and air mixture, you can save fuel.
- Fast acceleration is available at any time, it is only necessary to click on the accelerator pedal. If the revolutions are not enough, switch to the lowest gear. The same actions repeat when moving uphill.
- The cooling system will function in operation and keeps the power unit from overheating.
- Accordingly, the suspension and transmission elements will last longer.
Recommendation. On most modern carsEquipped with high-speed petrol engines, it is better to switch transmission when the threshold is achieved 3000 ± 200 rpm. This also applies to the transition from the highest speed.
As mentioned above dashboards Auto do not always have tachometers. For drivers with small driving experience, it is a problem, since the speed of the crankshaft is unknown, and the newcomer is not able to navigate the sound. There are 2 version of the issue: buy and install an electronic tachometer on a torpedo or use the table where the specified optimal revs Engine with respect to the speed of movement on different transmissions.
| Position 5-speed gearbox | 1 | 2 | 3 | 4 | 5 |
| The optimal speed of rotation of the crankshaft, rpm | 3200–4000 | 3500–4000 | at least 3000. | > 2700 | > 2500 |
| Approximate vehicle speed, km / h | 0–20 | 20–40 | 40–70 | 70–90 | more than 90. |
Note. Considering that various brands and modifications of the machines are different corresponding to the speed of movement and the number of revolutions, the table shows the averaged indicators.
A few words about riding riding from the mountain either after overclocking. In any fuel feed system, a forced idle mode is provided, activated under certain conditions: the car moves rolling, one of the gears is included, and the crankshaft turns are not lowered below 1700 rpm. When the mode is activated, the gasoline supply to the cylinders is blocked. So you can safely slow down the engine at the highest speed, without fearing in vain to spend fuel.
In materials about cars, expressions are often used high revs"," Large torque ". As it turned out, these expressions (as well as the connection between these parameters) are not clear. Therefore, we will tell about them in more detail.
Let's start with the fact that the engine internal combustion This is a device in which the chemical energy of fuel burning in the working area is converted into mechanical work.
Schematically, it looks like this:
Fuel ignition in the cylinder (6) leads to the movement of the piston (7), which, in turn, leads to the turning of the crankshaft.
That is, the cycles of expansion and compression in the cylinders are driven crank mechanismwhich, in turn, transforms the return-translational movement of the piston in the rotational motion of the crankshaft:
What is the engine and how it works are looking here:
So, the most important characteristics The engine is its power, torque and turnover at which this power and torque are achieved.
Engine speed
Under the wide-consumable term "engine turnover" mean the number of crankshaft revolutions per unit time (per minute).
Both power, and torque - no permanent values, they have a complex dependence on engine speed. This dependence for each engine is expressed by graphs similar to the following:
Engine manufacturers are fighting for the maximum torque of the engine to develop in as wide range of revolutions as possible ("torque shelf was wider), and the maximum power was achieved when revolutions, as close as possible to this shelf.
Engine power
The higher the power, the most speed Developing cars
Power is the ratio of work performed for a certain period of time, by this period of time. With rotational motion, power is defined as a piece of torque on angular speed Rotation.
Engine power recently is increasingly indicated in kW, and earlier traditionally indicated in horsepower.
As can be seen on the above graph, the maximum power and maximum torque are achieved with different crankshaft. The maximum power in gasoline engines is usually achieved at 5-6 thousand revolutions per minute, diesel - at 3-4 thousand revolutions per minute.
Power schedule for diesel engine:
In a practical plane - power affects the speed characteristics of the car: the higher the power, the greater speed can develop the car.
Torque
Torque characterizes the ability to accelerate and overcome obstacles
Torque (moment of force) is a work of strength on the arm of the lever. In the case of a crank-connecting mechanism, this force is the force transmitted through the connecting rod, and the lever is the crankshaft crank. Unit of measurement - Newton meter.
In other words, the torque characterizes the power with which the crankshaft will rotate, and how successful it will overcome the resistance to rotation.
In practice, the high torque of the engine will be particularly noticeable when overclocking and movement on off-road: at speed the machine is easier to accelerate, and outside the roads - the engine withstands the load and does not stall.
More examples
For greater practical understanding of the importance of torque, we give a few examples on the hypothetical engine.
Even without taking into account the maximum power, on a graph reflecting the torque, you can make some conclusions. We divide the number of crankshaft revolutions into three parts is low speed, medium and high.
On the left, the engine is presented on the engine, which has a high torque on low revs (which is equivalent to a high torque at low speeds) - with such an engine to ride off the road - it will "pull out" from any quagger. On the graph on the right - the engine, which has a high torque on medium turnover (average speeds) - this engine is designed for use in the city - it allows you to quickly accelerate from the traffic light to the traffic light.
The following chart characterizes the engine that provides good acceleration even at high speeds - with such an engine comfortably on the track. The graphics closes the universal engine - with a wide shelf - this engine and the swamps will pull out, and in the city it allows you to accelerate well, and on the track.
For example, 4.7-liter gas engine Develops the maximum power of 288 hp At 5400 rpm, and the maximum torque of 445 nm at 3400 rpm. A diesel 4,5-liter engine installed on the same car develops the maximum power of 286 hp With 3600 rpm, and the maximum torque is 650 nm with the "shelf" in 1600-2800 rpm.
The 1.6-liter engine X develops the maximum power of 117 hp At 6100 rpm, and the maximum torque in 154 nm is achieved at 4000 rpm.
The 2.0-liter engine provides maximum power in 240 hp. With 8300 rpm, and the maximum torque of 208 nm at 7500 rpm, being an example of "sportiness".
Outcome
So, as we have seen, the connection between the power, torque and engine turnover is rather complicated. Summing, you can say the following:
- torque responsible for the ability to accelerate and overcome obstacles,
- powerresponsible for maximum speed car
- but engine speed Everyone complicates, since each values \u200b\u200bof revolutions corresponds to its power and torque value.
And the whole looks like this:
- high torque on low revsgives a car craving for road off-road (such distribution can boast diesel engines). At the same time, power can be secondary parameter - Recall, at least, T25 tractor with its 25 hp;
- high torque (and better - "torque regiment) on medium and high revsmakes it possible to sharply accelerate in the urban stream or on the track;
- high power Engine provides high maximum speed;
- low torque (even at high power) will not allow the potential of the engine: having the opportunity to accelerate to high speedThe car will reach this speed incredibly long.
