Let’s start with an overview of how diesel engines work. Diesel engines are complex machines, but they’re also very powerful and compact. This means that the engine doesn’t need to be heavy or bulky in order to have a lot of power, which is good news for owners who want their vehicles to perform well both on and off-road. A diesel engine is created by compressing air and water vapor inside a cylinder. Once the fuel ignites, the combustion pushes the piston down. The energy from this movement is transferred to a power shaft that rotates and propels the vehicle forward or backward.
So why are diesels better than gasoline engines? A gasoline engine relies on explosions to compress air and water vapor and make power. This always puts a lot of strain on the whole engine, which creates heat that has to be managed by air conditioning or other cooling systems. It also means that gasoline engines wear out faster than diesels because they’re moving parts have to move much faster while they’re working.
Chevy diesel fuel mileage engines, on the other hand, work differently because they don’t have any moving parts that need to be lubricated. This means they are more powerful and efficient for powering a vehicle’s wheels than any gasoline engine. They can also use much less fuel than gasoline engines because they burn the fuel at a lower temperature, which stops the combustion process from creating heat that you have to either vent or cool with an air conditioner. This helps make diesels more efficient and safer.
How do diesel engines burn diesel? They start by using something called compression ignition (CI). CI is what makes diesel motors run better than regular gasoline engines and makes diesels so good at burning fuel at low temperatures. CI is what makes diesel engines good at using smaller amounts of fuel than gasoline engines.
Here’s how it works for a regular gasoline engine:
Takes in air and water vapor (combust) and compresses them inside the combustion chamber. Ignites the mixture with a spark from the spark plug (ignition). The compression produces pressure, which moves up to the top of the piston’s cylinder. The force pushes down on the piston, which pushes out pistons: Intake valve closes, facilitating intake air into chamber. Compression increases pressure in chamber. Top of piston moves up, energy is released as motion — thus power. Piston descends to bottom of cylinder, compression decreases and pressure decreases.
In diesel engines, this compression process is regulated when heat and pressure force the air to ignite.
From here, the combustion process continues like this:
The ignition of the fuel runs through a series of steps. Heat from the compressed air causes more air to compress inside the chamber of a diesel engine. This creates more heat, which has to be burned off before it can cause damage. Several things happen at once: The top piston compresses against a ring of vapors. The compressed air is pushed out through a small opening at the top of your piston into an area called a pre-combustion chamber (PCC). The gas vapor and the air in the PCC becomes super-heated from compression heat. This makes it ignite. The piston moves down to compress more air into the PCC. More air is compressed, more gas ignites, and more heat is produced in a cycle that can last up to several seconds. Eventually, enough of this heat builds up in the cylinder (called “adiabatic”) to ignite all of the gas without outside compression heating it up again. This final ignition by itself happens so fast that it creates a high amount of pressure inside your cylinder (it’s called “pressure ignition”). The piston moves out and continues pushing out exposed fuel until it runs out or burns completely clean.