Engine's Starter System

Unlike motors and steam turbines, internal combustion engines do not produce torque when starting, which means that the crankshaft must be moved manually so that it can begin the cycle. Automotive engines use an electric motor (starter) connected to the crankshaft by an automatic clutch that disengages as the engine starts. On the other hand, some small engines are started by turning the crankshaft by hand with a chain or pulling a rope that wraps around the wheel of the crankshaft.

 

Other starter engines include inertia starters, which are connected to a flywheel that is rotated by hand or with an electric motor until it has enough speed to be connected to the crankshaft. There are also combustion primers, which use the explosion of a cartridge to drive a turbine-coupled motor. Oxygen is needed for these to support combustion in the chambers in the first movements (especially in large motors.) Inertia starters and combustion primers are primarily used to start aircraft engines.

 

Information Courtesy of  Soporte Técnico Automotriz

 

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