REREV

Expert advice on car parts, maintenance, and repair.

  • Articles
  • Cars
    • Celebrity car collections
    • Car years to avoid
    • OBD2 codes
  • Engines
    • Firing orders
  • Tires
    • Tire and store reviews
  • Glossary
  • Statistics

Direct injection system definition and meaning

a close up of the engine of a car.
a woman with long hair posing for a picture.
Lilit Farmazian August 25, 2022 |

The direct injection system is a fuel delivery system that injects fuel directly into the engine’s cylinders, rather than into the intake manifold. This system is often used in high-performance engines because it allows for more precise control of the fuel mixture and can result in improved engine performance.

Direct injection systems can be either port injection or throttle body injection. In a port injection system, the fuel is injected into the intake ports, just before the valves. In a throttle body injection system, the fuel is injected into the throttle body, which mixes the air and fuel before it enters the engine.

Both types of direct injection systems have their advantages and disadvantages. Port injection systems tend to be more expensive and complex, but they can provide better fuel economy and emissions. Throttle body injection systems are simpler and often less expensive, but they can cause engine performance issues.

Previous post: Differential
Next post: Driveshaft
a woman with long hair posing for a picture.

Lilit Farmazian

Lilit is a car enthusiast and writer who has been writing about cars for years in her spare time. She loves nothing more than taking on new projects involving all things automotive.

REREV logo

Website

  • About
  • Editorial Guidelines
  • Contact
  • Terms
  • Privacy

Best tire brands

  • BFGoodrich
  • Bridgestone
  • Continental
  • Cooper
  • Falken
  • Firestone
  • Goodyear
  • Hankook
  • Kumho
  • Mastercraft
  • Michelin
  • Nexen
  • Pirelli
  • Toyo
  • Yokohama

Car Insights

  • Years to avoid
  • Collections
  • Statistics
  • Glossary

© 2022 REREV. All rights reserved.