What is dual injection?
What is dual injection?
While the Dual Injector system uses 2 narrower injectors per cylinder and mounts close to intake valve, the injector can have smaller nozzle holes and wide spray cone angle. Thus the Dual Injector system realize smaller fuel droplet and contribute improving combustion stability. Dual Injector.
How do dual injectors work?
The new twin injector system works by channeling fuel to two intake ports, instead of only one per cylinder. The process works by improving vaporization and reducing the diameter of the fuel droplets by about 60 percent, making combustion more efficient.
Which cars have dual injection engines?
Examples include:
- Redesigned Ford 3.5L EcoBoost and V6 engines.
- Lexus 2GR-FSE engines.
- Audi’s VW Group 3.0-liter V-6 and 5.2-liter V-10 engines.
- Toyota’s 2.0-liter in-line four-cylinder engines built by Subaru, and D4-S 3.5-liter V6 and 5.0-liter V-8 engines.
What is dual port fuel injection?
The dual-port injection (DPI) system is another promising strategy for fuel economy improvement and THC reduction in gasoline engines. The DPI system employs two PFI injectors on each cylinder. Locating the DPI injectors at the proximity of intake valves allows fuel spray to directly aim at the top of intake valves.
What are the pros and cons of direct fuel injection?
In general, GDI has higher efficiency, better fuel economy, lower emissions. The disadvantage would be some carbon build up, and slightly higher Particulate Matter emission than PFI.
What part turns the fuel injectors on and off?
The amount of fuel injected is controlled by a flap valve located in the engine’s air intake. The flap sits beneath the control unit and rises and falls in response to airflow – as you open the throttle, the ‘suck’ from the cylinders increases the airflow and the flap rises.
What are the disadvantages of GDI?
The disadvantages for the GDI system are few but can be catastrophic if they’re not closely monitored. Disadvantages: Dramatic efficiency losses due to deposits on the piston surface. More deposits on the intake ports and valves.
Which is an example of dual fuel injection?
This creates larger, harder and more crusty deposits in the fuel system. Ford, and other OEMs, have combined PFI with GDI for “advanced dual port and direct-injection,” also known as dual fuel delivery. Examples include: Toyota’s 2.0-liter in-line four-cylinder engines built by Subaru, and D4-S 3.5-liter V6 and 5.0-liter V-8 engines.
What kind of engines have dual port and direct injection?
Ford, and other OEMs, have combined PFI with GDI for “advanced dual port and direct-injection,” also known as dual fuel delivery. Examples include: Toyota’s 2.0-liter in-line four-cylinder engines built by Subaru, and D4-S 3.5-liter V6 and 5.0-liter V-8 engines.
How does the dual injector system work in a Nissan?
CAR TECHNOLOGY. The new Nissan Dual Injector system doubles the number of injectors per cylinder. This reduces the diameter of the fuel droplets, resulting in smoother, more stable combustion.
How does a dual injector system improve combustion stability?
To improve combustion stability, one of the famous approach is reducing fuel droplet diameter. While the Dual Injector system uses 2 narrower injectors per cylinder and mounts close to intake valve, the injector can have smaller nozzle holes and wide spray cone angle.