The Function of Camshaft Intake and Exhaust Solenoid Valves

[McAriana]

The camshaft intake and exhaust solenoid valves control the movement of the valve body to open or close different oil discharge ports, while the oil inlet port remains normally open. Hydraulic oil then enters different discharge pipes, and the oil pressure drives the piston of the oil cylinder. The piston, in turn, drives the piston rod, which moves the mechanical device. In this way, mechanical movement is controlled by switching the current to the solenoid on and off. The working principle of the overhead camshaft actuator solenoid valve is as follows: 1. Through the control section, force is applied to the control cam in the upper-level command for operation. 2. The camshaft position sensor then transmits this command and feeds it back to the cam operation position, providing information. The upper-level control system can make control decisions based on this feedback information, thereby achieving the control objective.

[VonKevin]

I've checked this thing many times for people at the auto repair shop. Actually, it's just a small component in the engine, mainly used to automatically adjust the valve opening and closing timing based on driving conditions. Simply put, when you press the accelerator to speed up or climb a hill, the engine computer sends a signal to this solenoid valve, which immediately controls the oil flow to the camshaft, making the intake or exhaust valves open a bit earlier or later. This allows precise adjustment of the air intake and exhaust, making the engine burn fuel more thoroughly, giving the car more power, and even saving some fuel. I see it often when repairing cars. If it's broken, the car may idle roughly or lack power during acceleration, but fortunately, replacing it isn't too expensive. The key point is why it was designed? The engine operates efficiently at different speeds with varying valve timing, which can't be adjusted manually. The solenoid valve automates this process, which also helps reduce emissions.

[Steph]

After driving for so many years, I've always paid attention to the role of these small components. The core function of the camshaft intake and exhaust solenoid valve is to make the engine work more intelligently. It acts like a precision valve that, upon receiving commands from the engine control unit, adjusts the camshaft angle by controlling oil pressure to alter the timing of valve opening and closing. This results in smoother acceleration, effortless hill climbing, and improved fuel efficiency. From my driving experience, especially in older models before this component was installed, the engine tended to jerk when shifting between low and high speeds, with fuel consumption increasing by about 10%. Modern vehicles utilize it to optimize valve timing, delivering much smoother power output, reducing pollutant emissions, and ensuring stable performance whether cruising on highways or navigating through traffic jams.

[Mia]

I often check this thing when repairing cars. The camshaft intake and exhaust solenoid valve is actually quite simple: it responds to engine signals, switching the oil flow path to adjust the camshaft position, thereby altering the valve timing. Its function is to optimize intake and exhaust efficiency. For example, at low RPMs, it delays valve closing to allow more air intake; at high RPMs, it advances exhaust to prevent choking. This way, the engine saves fuel, delivers stronger power, and emits less smoke. I've replaced solenoid valves many times—they're small but crucial. Common issues like dust clogging or wear can cause malfunctions, directly affecting engine performance. A simple cleaning during maintenance can prevent problems.