How does the timing chain tensioner's automatic adjustment mechanism work?

How does the timing chain tensioner's automatic adjustment mechanism work? What key components or technologies does it use to achieve automatic tension adjustment?

The automatic adjustment mechanism of the timing chain tensioner mainly realizes automatic tension adjustment through some key internal components and technologies. The following are its main working principles and key components or technologies used:

working principle:
The automatic adjustment mechanism of the timing chain tensioner is based on changes in the chain tension state, sensing the tightness of the chain through an internal mechanism, and automatically adjusting the position of the tensioning wheel to maintain appropriate chain tension.

The key components:

Tensioner: The tensioner is the core component of the timing chain tensioner. It rotates to apply or reduce tension on the chain. The tensioner usually consists of a bearing, a wheel body and gear teeth, where the gear teeth mesh with the chain.
Spring or hydraulic device: The spring or hydraulic device is the key component that provides the tensioning force. They automatically adjust tension based on the tightness of the chain. For example, a spring mechanism can automatically increase tension when the chain is slack and decrease tension when the chain is too tight. The hydraulic device controls the position of the tensioning wheel through oil pressure to realize automatic adjustment of the tensioning force.
Pressure-sensitive valve and oil circuit: In a hydraulic timing chain tensioner, the pressure-sensitive valve and oil circuit play a key role. The pressure-sensitive valve can sense the tightness of the chain and transmit the corresponding signal to the oil circuit. The oil circuit adjusts the oil pressure according to the signal from the pressure-sensitive valve, thereby controlling the position and tension of the tensioning wheel.

Automatic adjustment technology:
Hydraulic adjustment principle: The hydraulic timing chain tensioner automatically adjusts the tension through changes in oil pressure. When the chain is slack, the pressure-sensitive valve senses the slack force of the chain, increases the oil pressure in the oil circuit, and pushes the tensioner wheel to apply greater tension to the chain. When the chain is too tight, the pressure-sensitive valve reduces the oil pressure in the oil circuit, thereby reducing the tension.
Principle of the tensioning piece: There is a certain angle between the tensioning piece and the tensioning wheel. When the chain is too tight, the tensioning piece will produce a reverse force due to the pulling force of the chain, thereby reducing the pressure of the tensioning wheel on the chain. . This mechanism helps maintain the stability and reliability of the chain.
Principle of oil circuit damping: The oil circuit inside the timing chain tensioner has a certain degree of damping, which helps reduce the vibration and impact of the chain and keeps the chain at stable tension. At the same time, the oil circuit damping also makes the tensioner adjustment process smoother and more reliable.

The automatic adjustment mechanism of the timing chain tensioner realizes automatic tension adjustment through internal key components and technologies. These components and technologies include tensioning wheels, springs or hydraulic devices, pressure-sensitive valves and oil lines, etc. They work together to ensure that the timing chain maintains proper tension during engine operation, ensuring proper engine operation and performance.