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This contrasts the earlier overhead valve engine (OHV) and flathead engine configurations, where the camshaft is located down in the engine block. The valves in both OHC and OHV engines are located above the combustion chamber; however an OHV engine requires pushrods and rocker arms to transfer the motion from the camshaft up to the valves ...
Simpler camshaft drive system: OHV engines have a less complex drive system for the camshaft than OHC engines. [16] Most OHC engines drive the camshaft or camshafts using a timing belt, a chain, or multiple chains. These systems require the use of tensioners, which add complexity. In contrast, an OHV engine has the camshaft positioned close to ...
More than 5 million general-purpose engines were manufactured by Honda in 2009. Approximately 70% of the general-purpose engines manufactured by Honda are supplied as OEM engines to other manufacturers of power products. Current range (US & Europe) 1-cylinder. GX series Horizontal shaft GX100 (OHC) (2002–) (98cc) GX120 (OHV) (1991–) (118cc)
A single camshaft located in the engine block uses pushrods and rocker arms to actuate all the valves. OHV engines are typically more compact than equivalent OHC engines, and fewer parts mean cheaper production, but they have largely been replaced by OHC designs, except in some American V8 engines.
This engine was redesigned as an OHV for the 1956 model year, [3] but the flathead version reemerged in 1958 as the economy engine for the "new" Rambler American and remained available through 1965. [3] American Motors introduced a die-cast aluminum block version of the OHV 195.6 cu in (3.2 L) engine in 1961 and produced it through 1964. [4]
By 1952 Ford had new, 215 cu in (3.5 L) OHV 6-cylinder engine and Lincoln had a 317 cu in (5.2 L) OHV V8. [1] The company had designed the Y-block for a 1953 introduction, but a shortage of nickel due to the Korean War 's needs prevented the company from manufacturing the engine in sufficient quantities, [ 2 ] delaying it until 1954.
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