Thursday, 1 December 2016

How Does Petrol Start an Engine

How Does Petrol Start an Engine

Have you ever wondered how petrol makes an engine go? Well it’s quite a big process.

When you turn your key in your vehicle’s ignition it goes to a solenoid ( a cylinder that allows you to turn the key). This connects the key to the starter motor. The starter motor is a little electronic motor that helps turn the crankshaft. In other words, it helps turn the motor.

The Electronic Control Unit (ECU), turns on the fuel pump so it can pump the fuel from the tank through the fuel pump and to the injectors.
The Crankshaft Position Sensor (CPS) tells the ECU when to open the injectors and squirt the fuel into the engine. The ECU also sends a signal to the coil to send a spark to the spark plug.

To get the fuel burning pistons are essential. The injector squirts the fuel into a combustion chamber. The piston is fully down, as the piston comes up it puts more pressure on the . When the piston is at it’s highest point, the coil makes the spark plug spark. It makes a mini explosion, which pushes the piston back down. The starter motor is no longer needed and it is turned off as the engine can now run by itself.

The ECU is very important to the engine. It gives all of the signals to the coils and the injectors. That's how an engine runs.  

By Mitchell

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