16valve

16 valve refers to an internal combustion engine design that utilizes sixteen valves. In a typical four-cylinder engine, this means four valves per cylinder. These valves are divided into intake and exhaust valves, with two of each per cylinder. The intake valves are responsible for allowing the fuel-air mixture into the combustion chamber, while the exhaust valves permit the burnt gases to exit.

The primary advantage of a 16-valve design over older 8-valve (two valves per cylinder) engines is improved engine efficiency and performance. More valves allow for better airflow into and out of the cylinders. This leads to more complete combustion, increased power output, and often better fuel economy. The improved breathing characteristics enable the engine to operate at higher RPMs more effectively.

Modern gasoline and diesel engines commonly employ 16-valve configurations. They can be found in a wide range of vehicles, from small economy cars to high-performance sports cars and heavy-duty trucks. The 16-valve design is a standard feature in contemporary automotive engineering, contributing to the power, efficiency, and emissions control of today's engines.