What is the role of the valve train of a car engine?

The function of the valve mechanism of the main car is: to open and close the intake and exhaust valves of each cylinder regularly, so that the fresh combustible mixture (gasoline engine) or air (diesel engine) can enter the cylinder in time, and the exhaust gas can be discharged from the cylinder in time. During the compression and power strokes, the valve is closed to ensure that the combustion chamber is sealed.

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The function of the automobile engine valve mechanism is to open and close the intake and exhaust valves at the most suitable time according to the work sequence of each cylinder of the engine and the requirements of the working cycle of each cylinder, so as to realize the ventilation process of the engine.

The engine valve train is composed of camshafts, tappets, push rods, rocker arms, rocker arm shafts, valve springs and valve guides and other related components.

The function of the valve mechanism is to open and close the intake and exhaust valves of each cylinder regularly in accordance with the requirements of the working cycle and firing sequence carried out in each cylinder of the engine, so that the fresh charge can enter the cylinder in time and the exhaust gas can be discharged from the cylinder in time; During the compression and expansion strokes, the sealing of the combustion chamber is ensured. Fresh charge is a combination of gasoline and air for a gasoline engine, and pure air for a diesel engine.

1.Consult the relevant after-sales service personnel to understand the situation.

2.You can go to the big repair shop to check the specific fault and find a professional maintenance personnel to check.

3.It is recommended to operate and maintain according to the maintenance manual. Regularly maintain the owner, and change the engine oil once every 5,000 kilometers. Some vehicles will have a hint.

4.Go to the corresponding 4S shop, or a designated large-scale professional repair shop for service, so that the quality is the best, and the after-sales service will be in place.

Structure: valve train parts include: valves, valve seat inserts, valve guides, valve springs, valve spring seats and valve lock clamps, etc.; Valve train parts include:

Camshafts, tappets, pushrods, rocker arms, rocker arm shafts, rocker arm shaft seats, and valve clearance adjustment screws, etc. Working principle: According to the working sequence of the engine and the requirements of the working cycle, the intake and exhaust valves of each cylinder are opened and closed regularly, so that the fresh air enters the cylinder and the exhaust gas is discharged from the cylinder.

When the protrusion of the cam comes into contact with the tappet, it starts to jack up the tappet and the valve is opened. When the maximum bulge of the cam comes into contact with the tappet, the valve reaches its maximum opening. Subsequently, the bulge on the contact surface between the cam and the tappet begins to gradually become smaller, the valve begins to rise and close under the action of the valve spring, and the transmission rod such as the rocker arm is pushed in reverse to keep the tappet in contact with the cam.

The valve train is composed of two groups: valve transmission group and valve group, valve transmission group includes crankshaft timing gear, camshaft timing gear, camshaft, tappet, push rod, rocker arm, valve clearance adjustment screw and lock nut, rocker arm shaft, valve group includes valve, valve guide, valve spring, valve spring seat, valve oil seal, valve seat, valve seat, etc.

The engine valve mechanism (internal combustion engine valve mechanism) is to open and close the intake and exhaust valves of each cylinder regularly in accordance with the requirements of the working cycle and ignition sequence carried out in each cylinder of the engine, so that the fresh combustible mixture (gasoline engine) or air (diesel engine) can enter the cylinder in time, and the exhaust gas can be discharged from the cylinder in time. During the compression and power strokes, the valve is closed to ensure that the combustion chamber is sealed. Hope to be adopted by you, thank you.

1.Composition: intake valves, exhaust valves, hydraulic tappet assemblies, camshafts, camshaft timing gears, etc.

2.Function: According to the working cycle sequence in each cylinder of the engine, the intake and exhaust valves of each cylinder are opened and closed regularly to ensure that the fresh combustible mixture (gasoline engine) or air (diesel engine) can enter the cylinder in time, and the exhaust gas generated after combustion is discharged from the cylinder in time.

3.Classification: The valve mechanism is divided into two types: valve valve and valve valve. Automobile engines mostly use valve valve mechanisms.

The function of the valve mechanism is: to open and close the intake and exhaust valves of each cylinder regularly according to the requirements of the engine working cycle and firing sequence, so that the mixture or fresh air can enter the engine cylinder in time.

At the same time, the exhaust gas after combustion is discharged from the cylinder in time. The displacement of the engine refers to the sum of the working volume of all cylinders of the engine, and the number of cylinders multiplied by the cylinder volume is the displacement (displacement refers to the volume swept by the top surface of the buried plug from the top dead center to the bottom dead center or vice versa).

The four-stroke engine valve train of an automobile is generally composed of a valve group and a valve transmission group.

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Hello, 1. The valve mechanism can be divided into two parts: valve group and valve transmission group.

2. The valve group includes the valve and its related parts, and the composition of the valve group has nothing to do with the form of the valve mechanism, 3. The valve transmission group is all the parts from the timing gear to the valve action, and the valve transmission group mainly includes the camshaft timing gear, tappet, and the rocker arm and rocker arm shaft of the guide pusher.

The engine assembly mechanism is generally composed of a valve group and a valve transmission group, and the valve group is composed of valves, valve springs, and valve spring seats, and also includes a camshaft.

The valve train is composed of camshafts, push rods, valves, valve seats, valve springs, valve guides, tappets, and rocker arm groups.

The valve train is composed of two groups: the valve transmission group and the valve group.

Valve trains, overhead camshafts, valve train trains, and underlay camshafts are the most core components.

The function of the valve mechanism is to open and close the intake and exhaust valves regularly according to the working sequence of each cylinder and the ignition sequence of staring delay, so that the fresh combustible mixture can enter the cylinder, and the exhaust gas can be discharged from the cylinder. Automobile engines have a valve mechanism, which is composed of valves and valve transmission systems. The general automobile engine is using the double overhead camshaft design, the double overhead camshaft has two camshafts, one to control the intake valve, the other to control the exhaust valve.

It is suitable for the mixing of powder and granules with good material fluidity and small difference in physical properties, as well as the mixing of materials with low mixing degree requirements and short mixing time, because the material flow in the V-type mixing container is stable and will not destroy the original shape of the material, so the V-type mixer is also suitable for the mixing of granular materials that are easy to break and wear, or the mixing of finer powders, lumps of plum-like, and materials containing a certain amount of moisture, which is widely used in pharmaceutical, chemical, food and other industries.

It is determined by each cylinder, the cycle of work, the order of ignition, the function of each part running, and the mechanism of gas distribution is also in order.

The valve train is composed of two groups: valve transmission group and valve group, valve transmission group includes crankshaft timing gear, camshaft timing gear, camshaft, tappet, push rod, rocker arm, valve clearance adjustment screw and lock nut, rocker arm shaft, valve group includes valve, valve guide, valve spring, valve spring seat, valve oil seal, valve seat, valve seat, etc.

Mainly there are gears, tappets, push rods, camshafts, rocker arms, valve clearance adjustment screws, rocker arm shafts, valves, valve tube valves, spring valves, spring seats, nuts.

1. Function: In accordance with the requirements of the work cycle or the delay in the firing of each cylinder in the engine, open and close the intake and exhaust valves of each cylinder during the fixed volcanic search, so that the fresh combustible mixture or air can be entered into the cylinder in time, and the exhaust gas can be discharged from the cylinder in time.

2. Composition: valve group: valve and its associated parts; Valve train train:

Everything from the timing gear to the propulsion valve action. There is a valve gap between the tail end of the valve stem and the rocker end (the tappet end of the side-mounted valve train) to compensate for the expansion of the valve after heating.

When the engine is started, the valves will inflate in response to the rising temperature. If there is no gap between the valve and its transmission parts in the cold state or the gap is too small, in the hot state, the thermal expansion of the valve and its transmission parts will inevitably cause the valve to close loosely, resulting in the leakage of the engine in the compression and power stroke, so that the power decreases, and it is not even easy to start in serious cases.

In order to eliminate this phenomenon, a certain gap between the valve and its transmission mechanism is usually reserved in the cold assembly of the engine to compensate for the expansion of the valve after heating. This gap is called the valve clearance.

However, if the valve clearance is too large, there will be collisions between the transmission parts and between the valves and the valve seats in the cold state, and the wear will be accelerated, and the duration of valve opening will be reduced, and the cylinder inflation will deteriorate. Therefore, hydraulic tappets are used in high-end cars, and the length of the tappet can be automatically changed to compensate for the thermal expansion of the valve at any time, so there is no need to reserve valve clearance.