Why is constant low-speed driving bad for the engine?

Why is constant low-speed driving bad for the engine?

Experienced drivers can hear the erroneous conclusion that if you want to save fuel, try to drive at low revolutions. Is it so, is it really possible to reduce the consumption of gasoline and diesel, if you do not raise the revs of the engine. Let’s talk in detail about what such constant driving at low revolutions of the engine can threaten. And the specialists of this company will be happy to tell you how to recycle your machine: https://scrap4cash.com.

Why the constant driving at low revolutions is harmful for the engine?

Some theory

The concept of low revs will vary depending on the specific engine and the type of fuel the car uses. It is known that diesels are usually low rpm, such engines rarely spin out above 3,000 rpm of the crankshaft, with their power output already at the very bottom. Low rpm on a diesel is about 1000 rpm of the crankshaft.

Whereas on the gasoline engines, which are more high-speed, the red zone can begin with 6000, and the low revolutions are considered approximately up to 2500. It should not be thought that cars at such low engine speeds achieve maximum economy. Often at such revs does not even connect the turbine, respectively, the engine needs to spend more power, which is an increase in consumption of gasoline or diesel.

Dangers of driving at low rpm

Due to the peculiarities of gasoline power units, they produce most of their power in the middle and high rpm range, so it will be impossible to accelerate quickly from the bottom, which makes such driving a car simply dangerous.

Fuel consumption increases significantly. For adequate acceleration the driver should press the accelerator pedal down to the floor. At this time, a highly enriched mixture is poured into the cylinders, which significantly increases gasoline consumption.

At low revs, it is simply impossible to provide complete combustion of fuel in the engine. As a result, the exhaust system suffers, a deposit appears on the catalytic converter and the walls of the combustion chamber, after which it is necessary to rebuild the engine and cut out the catalytic converter.

Also at low revs, the oil pump and the gasoline pump can wear out, which do not get the necessary amount of lubrication and are not cooled, which leads to their rapid wear and subsequent costly restoration. It should be remembered that many assemblies in the car are designed for active use, not for constant fuel economy.

Is it dangerous to keep the engine speed low all the time?

At low revolutions there is an increased load on the engine and gearbox. Strange as it may seem, but such driving at low engine speed increases the load on the engine and gearbox, which leads to their premature wear, frequent breakdowns and the need for overhaul. Still, the transmission and engine are designed to operate in the medium rpm range, whereas being cranked up to the maximum or at the minimum rpm they quickly wear out and need repairs.

Detonation of the engine is often observed at low RPM, it significantly increases the load on the pistons, the expensive coating of the cylinders burns out, the engine shakes a little vibration, and driving such a car is simply uncomfortable. The fine shaking and constant vibration destroy transmissions, shafts, bearings and clutch.

At low speeds we constantly have to squeeze the clutch and shift gears, and this is a huge load on the gearbox, which wears out faster and soon requires skilled restoration.

Proper operation of the car

All told above does not mean, that the driver should constantly untwist the engine to a maximum and to drive at a red arrow of a tachometer. It is necessary to choose a kind of the golden mean, sometimes on the highway is not superfluous to “fry” a few kilometers to remove the carbon deposits and clean the exhaust system from the existing contaminants.

Try to keep the rpm indicator at the level of 2-4 thousand for petrol engines, and 1,5-3 thousand rpm for diesel power units. This will provide the right load on the engine, prevents breakdowns of the automatic, mechanics and motor, while achieving optimized fuel consumption and reducing the costs of the car owner for constant refueling.

To sum it up

Driving at low revolutions, not only does not help us to save fuel, but can also lead to engine damage, the need to change or cut out the catalyst, to repair the clutch, gearbox, and just such a ride is not safe, since we can not quickly accelerate from low revolutions in time. Therefore it is necessary to adhere to a golden mean, to operate the engine in an average range of revolutions, which will exclude the increased load on the power unit and will save you on fuel.

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