Intake valves are essential components in internal combustion engines. They control the flow of air and fuel mixture into the combustion chamber during the intake stroke. When the engine's piston moves down, the intake valve opens, allowing the mixture to enter, which is crucial for the engine's performance. These valves are typically made of durable materials to withstand high temperatures and pressures. They are operated by the engine's camshaft, which opens and closes the valves at precise intervals. Proper functioning of the intake valves is vital for efficient engine operation and overall vehicle performance.