I want to buy a Jetta, it can valve number two, another car is four, really a bit puzzled.
The valve, as the name suggests, is the inlet and outlet of the valve. When the engine is to work, it has to burn gasoline, and when it is burning, it has air. The valve is the device that controls the intake and discharge of the cylinder. The amount of output and the performance of the engine valve number is a direct influence is undeniable, the design of multi valve intake and exhaust design and the exhaust system, for peak horsepower output absolutely has a critical impact.The valve number of the engine is generally divided into 2 valves per cylinder, or 4 valves per cylinder, and a small number of valves with 5 valves per cylinder. It is worth noting that the car parameters often in two forms of "four cylinder four valve, inline four cylinder 16 valve," said the two represents the engine is four cylinder, 4 valves per cylinder, valve number for 16The number of cylinders used in automobile engines is 3, 4, 5, 6, 8, 10 and 12 cylinders. Displacement of 1 liters below the engine, commonly used 3 cylinder (such as Xiali 7100), 1 - 2.5 liters, usually 4 cylinder engine, 3 liters or so of the engine is generally 6 cylinder, 4 liters or so for the 8 cylinder, more than 5.5 liters with 12 cylinder engine. According to the arrangement of the engine, and can be divided into W type 12 cylinder engine (such as W12, Audi A8W12, Volkswagen Phaeton), V type 12 cylinder engine (such as BMW, Mercedes Benz S600, 760), W type 8 cylinder engine (such as W8, Passat) V 8 cylinder engine (such as Audi A6L4.2), boxer 6 cylinder engine (such as Subaru V, forester) type 6 cylinder engine, inline 5 cylinder engine and inline 4 cylinder engine. Generally speaking, in the same cylinder diameter, cylinder number, larger displacement, higher power; in the same displacement, cylinder number, diameter is smaller, speed can be improved, so as to get bigger promotion power.
The number of cylinder intake valve + exhaust valve is the cylinder valve number.Usually each cylinder has an inlet valve + an exhaust valve. Certain brands of engines will have more than one intake valve.
That is the intake and exhaust of the engine. It is estimated that you bought 1.6 or 2, and 1.8T has 5 cylinders per cylinder, and 20 for each. This thing is not advanced, that is, the beginning of the two valve, a little meat, and nothing else!
