What Components Does the Valve Train Include?
2 Answers
The valve train includes components such as valves, valve guides, valve seats, valve locks, and valve springs. The valve train (internal combustion engine valve train) operates according to the working cycle and ignition sequence requirements of each cylinder in the engine. It precisely times the opening and closing of the intake and exhaust valves for each cylinder, ensuring that fresh combustible mixture (for gasoline engines) or air (for diesel engines) enters the cylinders in a timely manner, and exhaust gases are promptly expelled from the cylinders. The valves are specifically responsible for introducing air into the engine and expelling the post-combustion exhaust gases. Structurally, they can be categorized into intake valves and exhaust valves.
The valve train is like the engine's little helper controlling the airflow. I find studying these components quite fascinating. At its core is the camshaft, which acts like an orchestra conductor, directing the opening and closing movements of the valves. Each cylinder has intake valves to let fresh air in and exhaust valves to expel burnt gases. The camshaft drives other components to move - rocker arms act as levers to amplify the motion, while valve springs ensure proper valve closure to prevent leaks. In pushrod designs, pushrods transmit power from the camshaft to the rocker arms. Additionally, valve keepers secure valve positions, and the timing chain or belt synchronizes with the crankshaft to ensure perfect alignment between ignition and valve opening. Don't forget hydraulic lifters that automatically adjust clearances to prevent noise when the engine is hot. The entire system requires precise coordination for smooth engine operation, and remember to change engine oil regularly to reduce wear during maintenance.
