Sleeve Valves

Sleeve valves are powered from hydraulic, pneumatic, solenoid sources. The length ranges from 150-240mm and above, breadth from 100-145mm and above, height from 120-150mm and above, diameter from 125-180mm and above, , size from ½- 4 inch and above. The device is manufactured from stainless steel and alumina ceramic.

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Detailed Description for Sleeve Valves

The sleeve valve is a kind of valve mechanism for piston engines, different from the usual poppet valve. They subsequently demolished from use due to advancement in poppet-valve technology, including sodium cooling, and the Knight system double sleeve engine's drift to burn a lot of lubricating oil or to seize due to lack of it.

The ports cut into the sleeve matched with inlet and outlet ports in the cylinder wall. The movement of the sleeve either aligned the sleeve and cylinder ports to permit the flow of gas or fuel or blocked them off to seal the cylinder for compression and combustion. Notwithstanding this valve system's tendency to exhaust large quantities of engine oil, it did offer several significant benefits over poppet valve systems.

Advantages

·         High volumetric efficiency due to very large port openings.

·         The size of the ports can be voluntarily controlled. This is important when an engine operates over a wide RPM range, since the speed at which air can enter and exit the cylinder is described by the size of the duct leading to the cylinder, and varies according to the cube of the RPM. In other words, at higher RPM the engine naturally requires larger ports that remain open for a larger proportion of the cycle, which is fairly easy to realize with sleeve valves, but difficult in a poppet valve system.

·         Good exhaust scavenging and adjustable swirl of the inlet air/fuel mixture in single-sleeve designs. The air/fuel mixture can be made to enter indirectly to the cylinder once the intake ports are.

·        The combustion chamber formed with the sleeve at the top of its stroke is perfect for complete, detonation-free, combustion of the charge, as it does not have to deal with compromised chamber shape and hot exhaust (poppet) valves.

·      No springs are encompassed in the sleeve valve system, therefore the power needed to operate the valve remains largely constant with the engine's RPM, meaning that the system can be employed at very high speeds with no penalty for doing so.

 

·   The cylinder head is not needed to host valves, permitting the spark plug to be placed in the best workable location for efficient ignition of the combustion mixture.

 

 


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