What is the operating temperature of a diesel engine?

Before determining what should be the operating temperature of the diesel engine or any other optimal parameters, you should find out what its design and operation are.

Diesel Engine Features

This type of engine was invented back in 1824 by a French physicist who put forward the theory that by changing the volume of the body, it can be heated, that is, to produce a rapid contraction.

Practical application of this hypothesis was found only 70 years later. It was then that the first diesel engine was produced. Its principle of operation is as follows: self-ignition of injected fuel occurs, which interacts with air in the process of compression.

The diesel engine finds a wide range of applications, from cars, agricultural machinery and to military equipment (tanks, sea vessels).

Advantages and disadvantages of the diesel engine

Like all other engines, diesel has a number of positive and negative sides. Main advantages:

• First, diesel engines can consume any fuel, so they do not make serious demands on it.
• Secondly, the larger the mass and concentration of carbon atoms, the greater the calorific value of the engine and its efficiency.
• Thirdly, vehicles with diesel engines are more responsive because of the high torque value at low rpm. Therefore, owners of sports fast cars prefer the diesel engine option.
• Fourth, the carbon dioxide content in exhausts is an order of magnitude lower than that of similar gasoline ones.
• Fifth, the diesel engine is more economical, since the cost of diesel fuel is less than the cost of gasoline.

Despite such an impressive list of advantages, the diesel engine also has a number of drawbacks:

• First, the cost of a diesel engine is higher than the cost of a gasoline engine, because the parts that arise during the operation must have high-quality and durable parts.
• Secondly, the power of gasoline engines exceeds the power of diesel engines.
• Third, in winter the probability of solidification of diesel fuel is greater than gasoline.
• Fourth, the operation of the diesel engine should be extremely careful and accurate, since if you do not care for it, you will have to carry out repairs that will cost a lot of money.

Combustion phases

The working process of the engine is divided into four parts. The first is the injection of a combustible mixture into a combustion chamber in which high pressure is present.

Second - this mixture begins to ignite and burn. The third part is the formation of unused blended droplets, which then turn into soot. At phase 4 - burn-out of fuel residues in order to limit the pollution of the atmosphere from them. Here there is a lack of oxygen, this is due to the burnt fuel mass in the previous parts.

Parameters of motors working on a diesel engine

Many car owners are asking what the working temperature of a diesel engine should be. But to answer it, you should pay a little attention to the main parameters that affect the operation of the motor. An important value in the operation of the motor is the number of cycles, that is, there are two- and four-stroke cycles.

The power of the unit also depends on the torque. The operating temperature of the diesel engine is determined by the degree of compression of the gas-fuel mixture, so the temperature is directly proportional to the compression. Thus, with increasing compression, the temperature will also increase, as a result of which the intensity of this process will increase, increasing the efficiency. It is worth remembering that the most efficient work is done with a uniform burning of the fuel mixture.

An important parameter for achieving the maximum possible performance is the operating temperature. The operating temperature of the diesel engine must be maintained based on the design and purpose of the engine. This fact determines whether the temperature is normal or not.

Working temperature of "Volkswagen"

What is the operating temperature of a Volkswagen diesel engine? This question is asked by many owners of these cars. As you know, each brand, model of the car, depending on the type of engine its operating temperature.

Typically, the operating temperature of the diesel engine "Volkswagen" is in the range of 90-100 degrees Celsius. Sometimes it happens that the instrument panel shows a temperature higher than it actually is. This happens often on certain brands of cars "Volkswagen". But do not rush to change the equipment, first you need to contact the service for a technical inspection and determine the cause of the malfunction.

Working temperature of "Mercedes"

The operating temperature of the diesel engine "Mercedes" depends on many factors. First of all, these are the operating conditions of the car. Then the type of thermostat. Also, depending on the region of residence, whether it is in Siberia or more southern regions, the thermostat is set at the optimum temperature.

The usual operating temperature of the diesel engine "Mercedes" can vary from 80 to 100 degrees. On powerful engines from 220 horsepowers put the thermostat at 75-78 degrees Celsius. For cold regions, on the contrary, up to 97 and above degrees.

Operating temperature "Opel"

The operating temperature of the diesel engine "Opel" due to the fact that it is under high pressure, can sometimes exceed the mark of the normal indicator by several points. Usually it fluctuates around 104-111 degrees Celsius.

In cars of "Opel" brand there is a cooling system. When the upper limit of the operating temperature is exceeded, a fan is activated which quickly cools the engine to the minimum value.

Operating temperature of KamAZ

Very popular among owners or about to become them is the question, what is the operating temperature of the KamAZ diesel engine. The answer to this question is 95-98 degrees Celsius.

At this temperature, the fuel is completely burned, most of the permissible clearance in the engine is selected. If the operating temperature is too low, it can be bad for the engine.

Oil in a diesel engine

The main task of the oil and other lubricants in the engine is a significant reduction in friction between the parts, which increases the life of the engine. The choice of lubricant depends on the type of engine and the tasks assigned. The operating temperature of the oil in the diesel engine depends on the engine cooling fluid. The difference is 10-15 degrees Celsius. The upper threshold of its normal temperature is 105 degrees.

In addition to temperature, the oil must also have optimal parameters for maximum engine efficiency: viscosity and lubrication. Viscosity should be determined on the basis of weather conditions, air temperature. As with improper selection of oil with improper viscosity, the engine and its parts can be damaged. Lubrication has two types: boundary, hydrodynamic. Boundary lubrication assumes that the waste oil is removed from the engine parts, and a portion of the new one is brought to them. Hydrodynamic is that the oil is constantly renewed, lubricating the parts. In more modern engine models, the first lubrication option is used.

Increase in operating temperature

A sudden increase in operating temperature in the engine can do more harm than an insufficient temperature. In this case, the motor parts start to work in the hydrodynamic lubrication mode, which leads to a decrease in the viscosity of the oil. Then the oil does not completely cover all the parts, which further leads to damage to the engine mechanism. Oil indicators will be normal, thanks to constant dosage. When the engine overheats, the housing and bearings first of all become unusable, but the pump remains normal. This phenomenon is similar to problems caused by insufficient lubrication.

Start of diesel engines in winter conditions

Almost all people know that before the trip it is necessary to warm up the engine of the car. Especially in the winter period. If we consider this heating process in detail, we see the following: first, the pistons begin to heat up, and only then the block of cylinders. If you start driving with a warm engine, the oil that has a thick consistency will not come in the right quantities. And in the end, this event can lead to breakdown.

It should be noted that excessive heating of the car for wear is very harmful. Thus, the service life of engine parts and the entire car is shortened. In order to warm the machine correctly, it is necessary to bring the temperature of the liquid to 50 degrees Celsius with idle turns. After this, you can safely start the movement, not exceeding 2500 revolutions. After heating the oil to the working mark, you can add gas.

Fulfilling these conditions, you can save in integrity not only the motor, but also your budget. If the engine refuses to start, then specially invented additives should be used. Because of their composition, they are not waxed. They are added not only as independent additives, but also in combination with fuel, observing optimal proportions.