OHV, acronym for Overhead Valve, refers to a type of internal combustion engine design where the valves are positioned inside the cylinder head. In an OHV engine, the camshaft is located within the engine block, parallel to the crankshaft, while the valves are situated above the combustion chamber. This construction allows for more efficient fuel combustion, enhanced performance, and improved power output.
The OHV design offers several advantages over other valve configurations. First, by having the valves placed directly above the combustion chamber, OHV engines facilitate more precise control of airflow and fuel distribution, resulting in increased combustion efficiency and better fuel economy. Additionally, OHV engines generally provide good torque, as they have a long stroke and larger displacement.
Moreover, the overhead valve layout also allows for better cooling due to improved airflow around the valves. This prevents overheating and promotes engine longevity. OHV engines are also relatively easy to maintain, as the valvetrain components are more accessible for inspection, adjustment, or replacement.
OHV engines are commonly found in various applications, including automobiles, motorcycles, recreational vehicles, and small engines. Their widespread usage is attributed to their reliability, relative simplicity, and cost-effectiveness. Furthermore, OHV engines have evolved over time, combining modern technologies and design advancements to achieve higher performance while meeting stricter emissions regulations.
