Why is it dangerous to drive at low speeds
Traffic in cities, where most cars are used on a daily basis, does not allow for fast movement. And the speed limit, along with the desire of most drivers to save fuel, makes the situation even worse. In this case, the engine wears out, since it cannot develop high revs.
All (or nearly all) drivers know that engine power and torque are dependent on rpm. Typically, a gasoline engine achieves maximum performance in the mid-range. Constant movement at high speeds does not lead to anything good, since the resource of the unit is rapidly decreasing.
On the contrary, driving at low speeds is also harmful to the engine. And many drivers believe that by not loading their car's engine, they not only extend its life, but also save fuel. However, this is not true, experts say.
At low speeds, the engine temperature rises. Failure of the cooling system will lead to overheating and costly repairs. In these cases, the cylinder head is deformed, antifreeze can get into the pistons, and oil can get into the cooling system. The consequences of such mixing are nightmarish - the engine often fails.
In engines of small size, but with high power and torque, knocking occurs at low revs, which the driver may not feel, because it is very short. However, the load on the main parts of the drive unit is quite significant. The knee mechanism and cylinder head suffer from frequent exposure to this impact. The temperature rises, which leads to overheating of the head gasket and even corrosion of the piston crown and cylinder walls.
Low speeds can also cause the air-fuel mixture to form incorrectly, which means it burns incorrectly and evenly. Consequently, fuel consumption also increases. The most economical speed limit for each bike is between 80 and 120 km/h, which is impossible to achieve in urban traffic.
Running the engine at low speeds also contaminates the combustion chamber and catalyst. This is why modern engines sometimes need to be supercharged and run at high revs. They have to travel hundreds of kilometers at high speed, which, of course, must comply with the restrictions and conditions of the road.
In fact, it shouldn't play in either direction. On the one hand, spare the engine, not giving it a lot of gas, and on the other hand, press the gas pedal to the floor. It is necessary to alternate operating modes and choose routes so that the engine can operate over a wide range of speeds.
