What Happens When the Engine Cylinder Valve Fails?
1 Answers
When the engine cylinder valve fails, the car will produce abnormal noises, experience unstable idling, poor acceleration, lack of power, and overall weakness. In severe cases, the engine may fail to start. This significantly impacts the vehicle, causing poor sealing, air leaks, excessive carbon buildup, and oil burning. Introduction to Valves: Engine valves, also known as cylinder valves, include intake valves and exhaust valves for each cylinder to facilitate air intake and exhaust. Typically, an engine has one intake valve and one exhaust valve. The size of the valves determines the amount of air intake and the efficiency of exhaust gas expulsion. The goal is to maximize the intake of fresh air and the expulsion of exhaust gases, so in design, intake and exhaust valves are made as large as possible to achieve these objectives. Valve Working Principle: During engine operation, valves move at high speeds. Larger valves have greater inertia, requiring higher strength for both the valves themselves and their driving mechanisms. Therefore, a single valve cannot be made excessively large. To overcome this limitation, engineers devised increasing the number of intake and exhaust valves to enhance air intake and exhaust efficiency. This led to the development of the commonly heard four-valve engine, where each cylinder has two intake valves and two exhaust valves, typically found in high-end engines.
