10 small parts that have a great impact on car performance

important little parts عملکرد خودرو

When we talk about a car, we're actually looking at a system where each of its components is working to achieve a goal that is driving

When we talk about a car, we’re actually looking at a system where each of its components is working to achieve a goal that is driving. Each of the parts and components of a car has its own task and if one of them does not work properly, it interferes with the function of the all system; hence all the components and parts of an automobile are important and their applications should not be ignore in the cars. In this short article, we going to introduce 10 small parts that have a great impact on car performance that you never thought would make your car become a useless object without them!


Alternators are used in modern automobiles to charge the battery and to power the electrical system when its engine is running. If the alternator is damaged, the battery warning light will first be illuminated and after a while, the car will be stop because the car battery’s life is usually not long lasting.

Axle shaft

An axle is a central shaft for a rotating wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to the vehicle, with the wheels rotating around the axle. In the former case, bearings or bushings are provided at the mounting points where the axle is supported. In the latter case, a bearing or bushing sits inside a central hole in the wheel to allow the wheel or gear to rotate around the axle. Sometimes, especially on bicycles, the latter type axle is referred to as a spindle.

Steering Column

The PCM is the electronic brains of your car. The steering column is topped with the steering wheel, which of course lets you guide the car precisely down a highway at full speed, or to quickly dodge a deer that jumps out onto the road. But the steering column is also a hub for other important car controls.

Fuel pump

A fuel pump is a frequently (but not always) essential component on a car or other internal combustion engine device. Many engines (older motorcycle engines in particular) do not require any fuel pump at all, requiring only gravity to feed fuel from the fuel tank or under high pressure to the fuel injection system. Often, carbureted engines use low pressure mechanical pumps that are mounted outside the fuel tank, whereas fuel injected engines often use electric fuel pumps that are mounted inside the fuel tank.


For the uninitiated, the clutch is the part of the car that is moved from gear to gear. While you can only see the pedal at work while you’re driving, these plates are out of sight and working hard to keep you driving smoothly.

Spark Plug

The spark plug is what you use to get the car started. It uses an electric spark to ignite fuel in the engine’s ignition chamber.


Flywheel is a mechanical battalion use for storing rotational energy. The anchor wheels have high idle torques and thus resist rotational speed variations. The amount of energy stored in an anchor with a second power is proportional to its rotational speed. To transfer energy to an anchor, they apply that torque, which increases the rotational speed and consequently increases the energy stored therein; and in reverse, the anchor can transfer circulating energy to a mechanical load, which reduces the rotational velocity It will be.

Head gasket

A head gasket is a gasket that sits between the engine block and cylinder head(s) in an internal combustion engine. Its purpose is to seal the cylinders to ensure maximum compression and avoid leakage of coolant or engine oil into the cylinders; as such, it is the most critical sealing application in any engine, and, as part of the combustion chamber, it shares the same strength requirements as other combustion chamber components.


It is a shaft which transmits the power developed by the engine to the various parts of the vehicle. Crankshaft is typically connected to a flywheel to reduce the pulsation characteristic of the four-stroke cycle, and sometimes a torsional or vibrational damper at the opposite end, to reduce the torsional vibrations often caused along the length of the crankshaft by the cylinders farthest from the output end acting on the torsional elasticity of the metal.


An engine control unit (ECU), also commonly called an engine control module (ECM), is a type of electronic control unit that controls a series of actuators on an internal combustion engine to ensure optimal engine performance. It does this by reading values from a multitude of sensors within the engine bay, interpreting the data using multidimensional performance maps (called lookup tables), and adjusting the engine actuators accordingly. Before ECUs, air-fuel mixture, ignition timing, and idle speed were mechanically set and dynamically controlled by mechanical and pneumatic means.


A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part. In internal combustion engines with pistons, the camshaft is used to operate poppet valves. It consists of a cylindrical rod running the length of the cylinder bank with a number of oblong lobes protruding from it, one for each valve.