DOHC Stands For: A New Engine Type Widely Adopted By International Car Manufacturers

YOGYAKARTA - The term DOHC may be familiar to many people, as it's often found on motorcycles and cars. However, not everyone understands its meaning. DOHC is an abbreviation for a type of engine used in vehicles.

DOHC stands for Double Overhead Camshaft. DOHC has now been widely adopted by global car manufacturers, especially in the production of their latest models.

So, what exactly is the function of DOHC? And how does it work? To answer these questions, see the explanation below.

What is DOHC?

As previously explained, Double Overhead Camshaft stands for DOHC. DOHC itself is a new type of engine developed by automotive experts and a counterpart to the SOHC engine.

DOHC Function

The DOHC itself has several vital functions in a car. The complete list of functions is as follows.

The main drive in a car

The main function of DOHC in a car can be said to be the main driver in producing wheel rotation and power.

Increase fuel combustion

Another function of DOHC is to improve fuel combustion efficiency. This significantly reduces exhaust emissions, making the car more environmentally friendly. This is possible because DOHC engines have two camshafts that control the valves in each cylinder, resulting in efficient fuel combustion.

Increase speed

Besides improving engine performance, DOHC can also increase a car's speed. It can even reach higher RPMs and top speeds. This is possible because a DOHC engine has four valves (two fuel valves and two exhaust valves) and two camshafts.

Improve engine performance

DOHC engines can deliver significantly more power and are more responsive. This is possible due to the increased number of valves and more precise and accurate components. This results in improved engine performance.

How DOHC Works

The DOHC engine in a car operates in a unique way, arguably more complex than its predecessor, the SOHC engine (an engine with two valves and one camshaft). The DOHC engine's working mechanism begins when the piston moves from Top Dead Center (TDC) to Bottom Dead Center (BDC) with the intake valve open and the exhaust valve closed. This allows the intake valve to draw in air and draw it into the combustion chamber.

Next, the piston moves from Bottom Dead Center (BDC) to Top Dead Center (TDC) with the exhaust and intake valves simultaneously closed. This compresses the air in the combustion chamber.

Before the piston reaches Top Dead Center (TDC), ignition timing occurs. This process is marked by the spark plug firing and igniting the air (gas) in the combustion chamber. This increases the air pressure in the combustion chamber, pushing the piston from TDC to BDC. This is when the power to propel the engine is generated.

That concludes our review of DOHC. We hope this is helpful. Visit VOI.id for more interesting information.