Engine torque what is it

Manufacturers have provided several characteristics of the car, helping to determine the potential performance properties, which are expressed in numerical values. One of them is the engine torque, what it is, we consider next. Although motorists are less interested in its value than the power of the engine, you should not belittle the importance of the factor.


  • 1 Understandable transcript
  • 2 Diesel feature
  • 3 The dependence of torque
  • 4 Influence of KM
  • 5 Possible increase

Understandable transcript

In order to understand what a car engine torque is in simple words, it is important to differentiate between it and the power designation. In the latter case, the power is commonly understood to be the work received per minute, which everyone in the physics course knows.

A power gasoline or diesel unit consumes liquid fuel and converts the resulting thermal energy into a kinetic form after combustion. During the process, work is performed, as a result of which the crankshaft is rotated. There is a new indicator characterizing the frequency of rotation of the crankshaft per unit time, for example, revolutions per minute.

what is a car engine torque in simple terms

It is necessary to know that the work produced by the internal combustion engine depends on the engine speed, and the dependence is directly proportional.

In the case of torque, the ratios between the main indicators of the processes are somewhat different. The resulting value is more pronounced as the product between the existing shoulder lever and the force generated by the motor. The latter is formed in the process of combustion of the fuel and ensuring the load on the working part of the piston, pushing the shaft knee. The force is traditionally measured by Newtons, and the dimensions are usually measured in meters; the length from the axis to the load point on the crankshaft crank assembly takes part in the calculation, which allows to measure the torque in "newton meters (N * m)".

In fact, the concept of torque is understood as an effort capable of developing by a specific motor. Due to this, it is possible to determine the high-speed car, contributing to the rapid set of speed and further movement. Considering the pattern, where the graph shows the dependence of the engine torque, it should be noted that the desired parameter is responsible for the “agility” of the vehicle and dynamic characteristics. It is important to note that the force generated during the combustion of gasoline will increase with an increase in the volume of the cylinders, respectively, this parameter is directly related to CM.

See also: Possible causes maslozhora engine

As a rule, among the main characteristics of the power plant there is the greatest developed power of the vehicle. Thanks to the torque, it is possible to understand how fast the car can reach the set value. In such a case, it will be appropriate to demonstrate a bunch of torque / speed achieved.

To put it in simple terms, it will be easy for a motorist to find out how soon the engine will reach its peak power levels, built structurally. In most cases, with a relatively small by modern standards, a value of 2500 rpm and a quiet ride, the most preferable is the transport that develops the greatest torque under the described conditions.

Accordingly, how to understand the maximum torque Nm at rpm, what is it? The result is the ability to realize acceleration and dynamics. Among power plants with approximately equal construction characteristics, preference is given to those that are endowed with increased torque.

Diesel feature

A distinctive feature of power plants operating on diesel, is a relatively high torque with reduced power. This is due to the small range of work. In diesel engines, the piston stroke is larger to provide an increase in the compression ratio, since this type of fuel has a specific combustion.

In fact, engines of this type are not designed to operate at high revs. The power plant spins not so intense. Adding to this a lower detonation and lower exhaust temperature, it will eventually have a car with an increased CM when compared with aspirated ones.

Torque dependency

The value of newton meters obtained by a particular car brand depends on several factors:

  • the area of ​​the working part of the piston;
  • engine capacity;
  • the value of compression in the cylinders;
  • distance from the crank to the main axis of the crankshaft.

For the working volume with the other equal values, there is a direct relationship. A larger total cylinder volume is characterized by an increased torque.

what does torque affect

A similar dependence can be traced for the radius on which the crank knee is located. However, it is worth considering that this value in modern vehicles varies quite within a limited range. This correlates with the design features of modern engines and the maximum unification of individual components.

See also: What does the color of spark plugs mean

The pressure generated inside the cylinders also has a direct relationship with the torque. This is reasonably fit into the existing formula, because the higher the pressure gauge readings, the more intense the force on the piston at the output of the circuit.

Influence of KM

To understand the importance of the parameter and its essence, it is worthwhile to draw an analogy with the human body. Torque will be comparable to the force used in life, and power will be the degree of endurance. On this basis, the power parameters make it possible to understand what speed a vehicle is capable of developing. Torque affects in a similar situation on how quickly it will be recruited.

When purchasing a car, it is important to take into account the parameter, because at practically equal power and different moment, two cars will behave differently during acceleration. If the driver wishes to overtake some cars on the highway, he will have to be sure that the accelerating dynamics depending on the CM will not let him down at the crucial moment.

Seasoned motorists prefer cars that can reach peak values ​​at optimum revolutions per minute. This ratio allows you to operate the vehicle with the best efficiency.

Manufacturers of cars strive to increase the torque in their products for the entire range of the engine. This is facilitated by the introduction of turbines. Also, in addition to turbocharging, controlled valve timing is used to help optimize the combustion of fuel. Along with these techniques, there are developments that help to increase the compression ratio or upgrade intake manifolds of different models.

Possible increase

Designers in the development of laying the future value of torque. On the basis of it, the remaining elements and components of the vehicle, including suspension, brakes, steering block, etc., are being developed.

Subsequent self-increase rate there are several. These include increasing the geometric dimensions of the piston group, replacing the injectors with more powerful ones. Motorists also introduce chip tuning, reprogramming the electronic control unit. As a result, it is possible to achieve an increase of 20-25% of the factory characteristics. The price tag on the work performed will be available to most motorists.