Learn About Valve Train Parts And Functions

The valve train parts of construction machinery engines play a vital role. They are responsible for controlling the opening and closing of the valves in the engine. The design and function of valve train components have a profound impact on engine performance, combustion efficiency, and emission levels. In this article, MyMROmarts will introduce the main components of parts of the valve train and their functions.

What Are All Valve Train Parts

Engine valve train parts include valves, valve guides, valve springs, valve lifters, camshafts, etc. They are responsible for controlling the opening and closing of the valves in the engine. The design and function of valve train components have a profound impact on engine performance, combustion efficiency, and the normal operation of other diesel engine components.

Functions Of Valves In Engine Valve Train Parts

The valve is the most direct component in the parts of the valve train that is responsible for controlling the airflow in and out of the cylinder. It is usually made of high-temperature alloy steel material, which has good wear resistance and high-temperature resistance. When the engine is running, the valve realizes the opening and closing action through the interaction with the camshaft. The size and shape of the valve will directly affect the airflow coefficient and flow characteristics of the valve. Thereby affecting the output performance and fuel economy of the engine.

Functions Of Valve Guides In Engine Valve Train Parts

The valve guides are mounted on the engine block cylinder head and provide support for the valves during movement. It withstands the friction and wear of the valve as it moves up and down. And lubricate the contact surface between the valve and the guide tube. Valve guides are usually made of superalloy or bronze. To provide adequate durability and thermal stability.

Functions Of Valve Springs In Engine Valve Train Parts

A valve spring is an elastic element. It is installed above the valve. It is responsible for returning the valve to the closed position. The moment the valve closes, the valve spring stores energy. When the camshaft pushes the valve again, the spring releases energy to make the valve close quickly. The selection of the valve spring should be determined according to the speed range of the engine and the quality of the valve. This ensures stable valve movement also at high revs.

The Function Of The Valve Lifter In The Engine Valve Train Parts

The valve lifter is a device used to adjust the valve lift. In some high-performance engines, in order to increase the valve opening height. The valve flow coefficient is improved, and the variable valve lift technology is adopted. The valve lifter can adjust the opening height of the valve according to the engine speed and load status. This optimizes the intake efficiency and emissions performance of the engine.

The Function Of The Camshaft In Engine Valve Train Parts

The camshaft is one of the most critical components in the parts of the valve train. It is made of high-strength alloy steel material with multiple raised cams on its surface. Each cam corresponds to a valve. As the camshaft turns, contact between the cam and the valve pushes the valve to open or close. The cam shape of the camshaft and the design of the camshaft directly affect the opening and closing speed and duration of the valve. Then affect the airflow characteristics of the valve and the output performance of the engine.

The Function Of The Rocker Arm In The Engine Valve Train Parts

The rocker's arm is an intermediate transmission member connecting the camshaft and the valve. The rocker's arm is designed to convert the rotary motion of the camshaft into the linear motion of the valves. It is usually made of high-strength steel material. And the surface is finely ground and coated to reduce friction loss. The length and material of the rocker's arm and the choice of rocker arm types will affect the opening and closing speed and sensitivity of the valve.

The Function Of The Valve Seat In The Engine Valve Train Parts

The valve seat is the gasket between the valve and the cylinder head. installed on the cylinder head. It is usually made of wear-resistant alloy materials to resist wear under high temperatures and pressure. The valve seat is responsible for forming a seal when the valve is closed, ensuring air tightness between the valve and the cylinder. Used to prevent gas explosions and provide better combustion efficiency.

The Function Of Valve Lifters In Valve Train Parts

The valve lifter is the transmission rod connecting the rocker arm and the valve. When the rocker's arm is pushed by the camshaft, the valve lifter transfers force to the valve, causing it to open. Valve lifters are usually made of high-strength alloy steel material. Used to withstand high-frequency valve opening and closing movements and maintain stable transmission efficiency.

The parts of the valve train are an integral part of an engine. Their proper design is critical to engine performance, economy, and reliability. Different makes and types of engines use different valve train designs. To adapt to different working conditions and application requirements.