Nissan today announced the development of a Dual Injector system designed to improve fuel efficiency in small-displacement gasoline engines. The new fuel delivery system, the first of its kind in the world, uses an injector for each port rather than one per cylinder – speeding up fuel vaporization, reducing the amount of unburned fuel and reducing hydrocarbon emissions. While most current gasoline engines utilize one injector per cylinder (furnishing fuel to two intake ports), the new Nissan Dual Injector system doubles the number of injectors per cylinder.This reduces the diameter of the fuel droplets by about 60%, resulting in smoother, more stable combustion.
The new Dual Injector system also uses half the amount of rare metals in the catalyzer while maintaining the efficiency of the catalytic conversion system. That number could potentially be reduced to 75% in combination with the ultralow-rare-metal catalysts that were introduced in 2008. Nissan will introduce the new system in production vehicles starting early in fiscal 2010.
