In most cars, there are two types of exhaust valves: the intake and the exhaust. The intake valve opens when air is pushed into the engine, while the exhaust valve closes when the air leaves the engine.

The purpose of these exhaust valve control systems is to control the flow of air into and out of the engine. By opening and closing at different times, we can adjust how much air is coming in and out at once. This helps prevent damage to the engine.

When a valve fails, it can cause serious problems. If an intake valve opens too early, it will allow cold air into the engine. This can cause damage to the pistons and other parts since cold air is less dense than warm air.

If an exhaust valve opens too late, it will let hot air escape from the engine. This can also cause damage to parts within the engine. By properly adjusting these valves, we can help prevent these types of problems from happening.

The importance of exhaust valve control might not be so obvious if you aren't aware of the performance benefits of this measure, and the general lack of experience with it. Exhaust valves as an essential part of the engine's performance, and can make your car much more efficient.