You may have heard the terms “direct fuel injection” and “indirect fuel injection” thrown around from time to time. But what do they mean? To anyone who’s not a car expert, it might just sound like useless technical jargon. To clear up any future confusion and to make your life easier, we’ve put together this handy post. Continue reading to learn the difference between the two, and the advantages of each.
Indirect fuel injection
Indirect fuel injection diesel engines (also known as IDI) utilize a pre-combustion chamber, which is where fuel rapidly mixes with air and autoignition occurs. Fuel is rapidly forced into the combustion chamber, which mixes with air in the cylinder, effectively powering the truck. The glow plug is also in the pre-combustion chamber, and the pistons in this type of engine look like the pistons in a gasoline engine.
These fuel injection systems in Corpus Christi, TX were common in all diesel trucks until the 1990s, when they were replaced with more effective direct fuel injection diesel engines (DI).
Direct fuel injection
As mentioned above, DI diesel engines arrived on the scene in the 1990s and changed the diesel engine industry. As the name implies, DI diesel engines inject fuel directly into the combustion chamber. Fuel is injected into the chamber right into the top of the piston. These engines operate at higher injection pressures, which means the pre-chamber isn’t required to diffuse the fuel.
Which is right for me?
Though IDI technology is outdated by a few decades, that doesn’t mean you should get rid of your old truck or avoid purchasing a truck with an IDI diesel engine. Trucks with IDI engines have less complex engines, which makes them easier to maintain. Additionally, an older truck with an IDI engine will be less expensive than one with a DI engine.
Direct injection diesel engines do have a number of advantages over their older counterparts. First off, DI engines have higher thermal efficiency and produce less soot, so they’re better for the environment. DI engines also have better performance potential, especially if they’re well maintained. If you’re traveling through the mountains, you’d probably rather be in a truck with a DI engine, as these engines also perform better at higher altitudes. Additionally, DI engines provide a smoother and more comfortable ride.
Obviously, the choice is yours when it comes to which type of engine you choose. Keep in mind, however, that regardless of the engine type, you still need to ensure that professional maintenance is performed every once in a while. Diesel engines are great, but they do necessitate the help of a professional if you want to enjoy a long-lasting vehicle.
Whether your engine is a DI or IDI, be sure to bring it to Coastal Diesel Injection when it’s in need of repairs or an upgrade. We specialize in modifying and fixing both direct and indirect fuel injection systems in Corpus Christi, TX. Call us today to schedule an appointment or learn about all of our services!