Fuel injector and fuel injection system

Patent · Tue Nov 15 04:00:00 EST 1988

OSTI ID:6761484

Igashira, T; Sakakibara, Y; Yoshinaga, T; Watanabe, K; Takigawa, M; Natsuyama, Y; Daido, S

This patent describes a fuel injector comprising; a housing having formed therein a fuel pressure control chamber and an accumulator, which temporarily retain fuel, a path leading into the fuel pressure control chamber and accumulator, so that they receive which is intermitently fed under pressure from a fuel source through the path, and formed with a nozzle hold through which fuel in the accumulator is injected; a piezo actuator accommodated in the housing, defining the fuel pressure control chamber and expanding and contracting in accordance with a voltage applied thereto to change the volume of the fuel pressure control chamber; needle valve, of a type which opens and closes a responsive to an applied pressure, provided reciprocally movable within the housing between the accumulator and the nozzle hold and which, responsive to a pressure from the fuel pressure control chamber an accumulator, opens and closes communication between the accumulator and the nozzle hold; check valve means for normally closing communication between the path and the fuel pressure control chamber and between the path and the accumulator and for opening the communication according to pressure in the path and/or in the fuel pressure control chamber; and an electric circuit which controls a voltage applied to the piezo-actuator.

• Assignee: Nippon Soken, Inc., Nishio
• Patent Number(s): US 4784102
• OSTI ID: 6761484
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
ACCUMULATORS
ACTUATORS
CONTAINERS
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
DESIGN
ELECTRICITY
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
HYDRAULIC ACCUMULATORS
INTERNAL COMBUSTION ENGINES
MECHANICAL ENERGY STORAGE EQUIPMENT
PIEZOELECTRICITY
PRESSURE CONTROL
TANKS
VALVES
VOLTAGE REGULATORS