An overhead cam (OHC) arrangement offers several advantages over an overhead valve (OHV) setup, primarily in terms of performance and design flexibility. OHC designs can allow for more precise control of valve timing and lift, enabling higher engine speeds and improved airflow, which enhances power output. Additionally, they typically have fewer components, resulting in reduced weight and complexity, which can lead to better fuel efficiency and easier maintenance. Overall, OHC arrangements are often favored in modern performance engines for their efficiency and tuning potential.
Fewer moving valve train parts such as the push rods.
the advantage of OHC : - more accurate control of valve operation, especially at higher speeds. where as the OHV is more complicated due to the pushrod and rocker system that was added. hope this helps x
the advantage of OHC : - more accurate control of valve operation, especially at higher speeds. where as the OHV is more complicated due to the pushrod and rocker system that was added. hope this helps x
Using a presta valve on a bike has advantages such as being lighter, allowing for higher tire pressure, and being more secure against leaks compared to other valve types.
An overhead valve (valve in head) engine has the valves in the head (not in the block) and they are in line with the motion of the piston, but are above it. Valves are usually operated by push rods or by overhead cam (driven by timing belt/chain from the crankshaft). The engine can be in any orientation : ie the cylinder motion could be horizontal or vertical. Overhead valve engines are high performance engines used in motor bikes and cars A side valve engine has the valves in the block (not in the head). The valves are parallel to the piston motion and are placed just beside the cylinder. Valves are lifted by a camshaft, gear driven off the crankshaft. This arrangement is also known a 'L-head' engine. Advantages are that the head is simpler. The flow of fuel and exhaust gas is less efficient than overhead valve engine. due to having to make a 90 degree turn. Compression ratios are usually lower with side valve engines, so they will run happily on lower octane fuel. Side valve engines are mostly used on lawnmowers etc.
Using a multi-valve arrangement allows for better engine breathing, as it increases the surface area for air intake and exhaust gases to flow. This can result in improved engine efficiency and power output. Additionally, multi-valve engines can have smaller valves, reducing reciprocating mass and allowing for higher engine speeds. Lastly, multi-valve arrangements can promote better fuel combustion by enhancing air-fuel mixing in the combustion chamber.
The advantages of using a presta bike valve include its ability to hold higher air pressure, its compatibility with narrow rims, and its lighter weight.
It's a valve that's over your head
Mainly, the difference is that in an overhead cam engine, the camshaft is mounted on the head of the engine, and the valves are still overhead, in an overhead valve engine (sometimes called a "pushrod motor"), the camshaft is in the crankcase.
Under the valve cover, of an overhead valve engine. They push the rockers on the opposite side of the valve stems. Overhead Cam engines do not have push rods.
The advantages of using a presta bike tire valve include its ability to hold higher air pressure, its compatibility with narrow rims, and its lighter weight.
Single Overhead Valve Engine