The batteries can be charged using an internal combustion engine, fuel cell, solar cell, power regeneration and external charging.
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The large end of the connecting rod connects to the crankshaft and the small end connects to the piston.
The firing order for a four-cylinder engine is 1-3-4-2or1-2-4-3.
These include the starting system, charging system, cooling, ignition, lubricating, fuel and the exhaust systems.
These four strokes are intake stroke, compression stroke, power stroke and exhaust stroke.