Ok kiddo, so petrol direct injection is how cars use petrol to power their engines. It's kind of like how you put gas in your toy car to make it go, but in real cars the fuel goes directly into the engine instead of in a separate area like in your toy car.
So, let's start with what happens when you press on the gas pedal in a car with a regular engine. The fuel and air mix together in a small area called the intake manifold, and then get sucked into the engine through tiny holes called injectors. These holes spray the fuel and air mixture into the engine's cylinders, where it gets ignited by a spark and creates power that moves the car.
But with petrol direct injection, the fuel gets sprayed directly into the combustion chamber of the engine, instead of in the intake manifold. This makes the fuel and air mix much more precise and powerful, which means the car can use less fuel but still make more power.
It's kind of like a chef using a fancy tool to spray salt on your meal instead of just sprinkling it from above – the salt gets spread out more evenly, making the food taste better while using less salt.
So, petrol direct injection is a way for cars to use fuel more efficiently, which is better for the environment and also saves you money at the gas pump. And now, you know how it works!