Engine Valve: An Overview From Engine Valve Machine Manufacturer2020-08-06

One important and indispensable part within ignition chamber and cylinder systems of any engine is the valves.

 

It plays a key role in the performance of all internal combustion engines for efficient functioning.

 

It controls, monitors and directs the volume of air and fuel inside the engine’s combustion chamber for ignition to take place.

 

Considering its functions, it is important you partner with a reliable engine valve machine manufacturer when shopping for one to get the best quality.

 

At various prevailing conditions and speed, your Cummins marine engine works at optimum efficiencies because of the accurate timing of the valves.

 

A typical diesel engine valve is the poppet –type. It has a flat-faced piece of metal which is the head attached to a thin stem.

The appearance looks very much like the shaft or a plunger of a trumpet.

 

Parts of an engine valve

The design from an engine valve production line for a poppet –type has the following parts:

1. Tips

2. Combustion face

3. Margin

4. Keeper groove

5. Seat face

6.  Fillet

 

Each poppet valve is positioned in a round hole just above the combustion chamber.

 

The valve seat creates a firm seal between the valve and the surface of the combustion chamber.

 

The valve spring ensures the component is closed by pushing against a retainer.

 

Engine valves are stationed on the engine’s combustion cylinder and can be made of different heavy metals.

 

These depend on the engine valve machine manufacturer’s purpose and are as follow:

1. Stellite alloy

2. Low carbon steel

3. Nickel alloy

4. Stainless steel

 

Different designs are produced from the engine valve production line to enhance the valve’s grit and performance.  In a high level performance engine, the valves maybe built of titanium.

 

In some cases, the valves are   specially coated to increase their resistive properties to wear, heat and corrosion.

 

The special process of coatings and treatments can range from Zirconium nitride coating to Chromium nitride coating and hard Chrome plating.

 

Leveraging on the different configurations available, engine valves can persist and function at extreme conditions of the combustion chamber.

 

Types of Engine valves

The two types of engine valves include the intake valve and the exhaust valve. The number of each type in a marine engine varies depending on the make and model of the engine.

 

A multivalve engine system can have three to five sets of valves to enhance fuel consumption performance.

 

The engine’ camshaft controls the timing belt or chain which determines the intake and exhaust valves’ opening and closing time.

 

Valves and their performance are central to the effective and precise engine operations.

Functions and purpose of Engine valves

One of the functions of the valves is to allow a mixture of air and fuel to flow in and out of the combustion chamber through openings called ports.

 

Both intake and exhaust valves work to ensure the chamber is sealed at definite points to ignite and release the burnt fuel.

 

On one side of the combustion cylinder, the intake valve controls the volume of air to enter at a specific time while the exhaust valve removes the exhaust air on the other side.

 

The efficiency and performance of an engine is heavily linked to the volume of air it allows in and out of the cylinder.

 

There are basically four operations in the internal combustion engine called strokes. These are:

 

1. Intake stroke

This is the start -up step which involve the opening of the intake valve to suck in air into the combustion chamber where it mixes with the fuel.

 

2. Compression stroke

The compression stroke involves both the intake and exhaust valve. They close up to entrap the air and fuel mixture.

 

The pressure builds and thus increase combustion of the mixture as the piston is forced upwards.

 

3. Power stroke

During stroke three called power stroke, the compressed mixture spontaneously combusts, leading into the conversion of fuel and air into mechanical energy.

 

The ignited fuel and air increases in volume thereby forcing the piston back down the cylinder. As a result, the crankshaft turns.

 

4. Exhaust stroke

As the piston moves its way back up the cylinder after compression and ignition, the exhaust valve opens to get rid of the gases.

 

After this it will then close as the intake valve begins the operations all over. The functioning of the engine valves at high speed forces the motor to move your boat. Interesting!

 

Conclusion

Engine valves have special functions and are indispensable in propelling a big boat or car.

You might want to be sure that what you got is the best quality by engaging a reliable engine valve machine manufacturer.