September 27, 2022

Mechanic Escape

Built for the human race

5 Factors that Affect the Engine Performance

What Are Some Factors That Affect Engine Efficiency? – McNally Institute

Are you tired of using old tech that doesn’t give you the performance you want? Do you want to sell your car in Dubai to get a fast ride?

Well, many factors boost the power of your car and increase its efficiency. Learn more about these five things that affect the power of an engine.

You might know the basics of engine mechanics, but did you realize that several other components play a role in helping your vehicle run efficiently? Read on to find out how to improve your car’s performance.

  1. Transmission

Power and torque are the two parameters every car buyer in Dubai looks for when thinking of getting a new vehicle. The more power and torque, the better, except for those looking for sobriety.

The power and torque of an engine are one thing, but the transmission is another. When we talk about transmission, we mean the gearbox above all. Therefore, it’s necessary to understand that a gearbox can boost or devalue a torquey engine.

Long gears tend to mute the engine, making it labor and giving the feeling of a lack of power despite being hefty. Thus, we hear about car models with generous engines with linearity and lack of expression. If you are a buyer, do not hesitate to assimilate the gear ratios of the box.

In addition, the inertia of the box is also essential. Therefore, the heavier the assembly, the more power you lose between the engine and the wheels.

Although the gearbox has a decisive role in engine performance and the feeling of power, the term transmission also implies the differential and the drive shafts. 

We lose more power when the distance between the engine and the wheels is long. The more mass between the engine and the wheels, the more power you lose.

The universal joints/driveshaft length can vary widely from one engine architecture to another. Therefore, traction and cars with mid/rear engines have the advantage of having to animate wheels that are not far away.

  1. Flywheel

A too heavy flywheel affects the engine power and the response time (it goes up and down faster in revs).

  1. Wheels/rims

On modest power engines, wheels that weigh a little too much reduce the performance of the car. The light alloy rims (aluminum, magnesium, etc.) allow a significant gain. 

If we remove 1 kg per wheel (unsprung masses) we will gain much more than if we lightened the car (suspended mass) by 4 kgs! 

The most important thing is to lighten the masses linked to the kinematic chain of the powertrain (from the flywheel to the wheels).

The width of the wheels will also be decisive: the thinner it is, the less power you need to reach a certain speed. The tires’ diameter also influences acceleration and top speed.

The morphology of the rims will also be essential: the more they have a fan effect, the more the car will be braked. When rims start spinning, they blow towards the outside or the inside of the wheel arch).

Finally, tire inflation has a role in performance.

  1. Accessories

The accessories to be driven by the engine also take power.

We can think of the air conditioning compressor and the various pumps (power steering, vacuum pump, water pump often driven by the distribution).

  1. Atmospheric conditions

When the air is denser the air, more happens in the combustion chambers leading to more power. That is the turbo principle: compressing the air to introduce a maximum of it into the engine to inject more fuel and therefore have more power. 

In a natural way (not to mention turbo), depending on the atmospheric pressure, we will logically have more or less dense air. At 1 bar we are at the top (1 bar = atmospheric pressure). Below that, the engine can’t deliver all its power.

Atmospheric pressure varies with temperature and altitude.

Power and torque are very partial and incomplete information.

Looking at the power and torque of an engine is like judging a person on the biggest feat they have done in their life. It’s the same with an engine, the torque and power data are the maximum values reached by this block over the entire rpm range.