Spine Fit

The power stroke, here due to the pressure in previous stage, fuel injector opens initially at this stage, fuel is sprayed from the top of the engine. The high pressure and temperature pushes the piston from top to the bottom is known to be power stroke, also the ignition of the fuel take place. The exhaust stroke, the exhaust valve opens and inlet valve closed, allows the piston from bottom to the top. Also the burnt gases are released at this stage.