Patent Number: 6,293,255

Title: Fuel injection system

Abstract: The present invention is an injection system including an injection device. The injection device includes a pumping chamber and an electrically operated device associated with the pumping chamber which, when energized, is capable of providing a rapid increase in localized fluid pressure in said pumping chamber without reciprocating a piston in a cylinder bore. A discharge port associated with the pumping chamber permits discharging of fluid displaced by the localized pressure increase. The injection system includes a circuit providing an energizing voltage to the electrically operated device, and a control for changing at least one characteristic of the energizing voltage selected from the group consisting of: the peak energizing voltage, the rate at which said energizing voltage increases, the rate at which said energizing voltage decreases, the duration of energization, and the frequency of energization.

Inventors: Otome; Kimitake (Iwata, JP), Kaku; Junichi (Iwata, JP), Kageyama; Hidetoshi (Iwata, JP)

Assignee: Yamaha Hatsudoki Kabushiki Kaisha

International Classification: F02M 63/00 (20060101); F02D 41/20 (20060101); F02D 37/00 (20060101); F02M 57/00 (20060101); F02D 37/02 (20060101); F02M 57/02 (20060101); F02M 63/06 (20060101); F02M 51/06 (20060101); F02B 61/02 (20060101); F02B 61/00 (20060101); F02M 037/04 ()

Expiration Date: 09/25/2018