Can the engine valve clearance be adjusted automatically?

The valve clearance of the engine can be adjusted automatically. The setting of valve clearance is to ensure the normal operation of the valve mechanism of internal combustion engine. When the valve mechanism works, due to the high-speed and high-temperature environment, the valve tappet, valve stem and other parts are easily stretched by heat, so it is necessary to automatically push the valve open to ensure normal work. Valve clearance usually means that when the engine is in a cold state, the valve leg and its transmission mechanism leave a proper clearance to compensate the expansion of the valve after heating, which is called valve clearance. Generally speaking, the valve clearance of the exhaust valve is slightly larger than that of the intake valve. When adjusting the valve clearance, it is necessary to loosen the lock nut and the adjusting screw first, then insert the feeler gauge with the same thickness as the specified value of the valve clearance into the gap between the adjusting valve foot and the rocker arm, and rotate the adjusting screw to stretch the feeler gauge back and forth. If the plug gauge has slight resistance, the lock nut needs to be tightened and readjusted. If the gap changes, it needs to be readjusted.