all of the chamber is located directly above the piston). This forms a relatively compact combustion chamber without any protrusions to the side (i.e.
Above this, the sides and roof of the combustion chamber include the intake valves, exhaust valves and spark plug. Modern engines with overhead valves or overhead camshaft(s) use the top of the piston (when it is near top dead centre) as the bottom of the combustion chamber. OHC engine combustion chamber, located between the piston (shown in yellow) and the valves (blue and red) The engines are often designed such that the bottom of combustion chamber is roughly in line with the top of the engine block. In spark ignition engines, such as petrol (gasoline) engines, the combustion chamber is usually located in the cylinder head. This contrasts an external combustion engine, where the combustion takes place in a separate part of the engine to where the gas pressure is converted into mechanical energy. for a piston engine, the force is applied to the top of the piston), which converts the gas pressure into mechanical energy (often in the form of a rotating output shaft). In an internal combustion engine, the pressure caused by the burning air/fuel mixture applies direct force to part of the engine (e.g. ( August 2020) ( Learn how and when to remove this template message) Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources in this section. This section needs additional citations for verification.
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