What is pentroof combustion chamber?

A pentroof combustion chamber is a type of engine combustion chamber design in which the shape of the chamber resembles a five-sided roof or pentagon shape. This design is commonly used in modern gasoline engines to promote better airflow and fuel mixing, which can improve overall engine efficiency and performance.

In a pentroof combustion chamber, the valves are located in the roof of the chamber, which allows the fuel and air mixture to be directed towards the center of the chamber for better mixing and combustion. The result is a more efficient and complete burn of the fuel, which can result in improved fuel economy and reduced emissions.

Pentroof combustion chambers are commonly used in modern engine designs because they provide a good balance of performance and fuel efficiency. They also allow for higher compression ratios, which can further improve engine efficiency and power output.

Overall, the pentroof combustion chamber is an important feature of modern gasoline engines, and it has helped to improve the efficiency, power, and emissions of these engines over the past several decades.