OHVmotorer

OHVmotorer, or OverHead Valve (OHV) engines, are a type of internal combustion engine where the valves are located in the cylinder head, directly above the combustion chamber. This design contrasts with Side Valve (SV) engines, where the valves are positioned on the side of the cylinder. OHV engines are known for their simplicity and reliability, making them popular in various applications, including lawn mowers, chainsaws, and small outboard motors.

The primary advantage of OHV engines is their straightforward design, which reduces the number of moving parts and simplifies manufacturing. This simplicity often translates to lower production costs and easier maintenance. Additionally, OHV engines typically have a higher power-to-weight ratio, making them suitable for lightweight applications.

However, OHV engines also have some limitations. The overhead valve design can lead to higher valve spring tension, which may result in increased wear and tear over time. Furthermore, the direct exposure of the valves to the combustion chamber can lead to higher temperatures, potentially affecting the engine's longevity.

OHV engines have evolved over the years, with advancements in materials and manufacturing techniques improving their performance and durability. Modern OHV engines often incorporate features such as improved valve seals, optimized valve timing, and enhanced cooling systems to mitigate some of the traditional drawbacks of the design.

In summary, OHVmotorer are a classic and reliable engine design that has been widely used in various applications. Their simplicity and efficiency make them a popular choice for many off-road and small engine applications.