Electrostrictive actuator device and fuel injection device using same

Patent · Tue Jun 07 04:00:00 EDT 1988

OSTI ID:7128597

Igashira, T; Sakakibara, Y; Abe, S; Sekiguchi, K; Izawa, A; Kawai, H

This patent describes a fuel injection pump of the distributor type for a diesel engine using, for controlling the rate of injection, an electrostritive actuator device having an electrostrictive actuator and an electric circuit means. The electrostrictive actuator is positioned to be responsive to fuel pressure in a pump chamber of the pump. The electric circuit means comprises: electric charge changing means for changing an electric charge of the electrostrictive actuator in the state of generation of an electric charge due to a force of the fuel pressure exerted on the electrostrictive actuator, and thereby constricting the electrostrictive actuator to stop a fuel injection; and electrical charging means for charging the electrostrictive actuator in the state of constriction due to the operation of the electric charge changing means when the force of the fuel pressure exerted on the electrostrictive actuator is reduced after the fuel injection, thereby extending the electrostrictive actuator.

• Assignee: Nippon Soken, Inc., Nishio
• Patent Number(s): US 4748954
• OSTI ID: 7128597
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
ACTUATORS
DESIGN
DIESEL ENGINES
ELECTRIC CHARGES
ELECTRICAL EQUIPMENT
ENGINES
EQUIPMENT
FLUID MECHANICS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
HYDRAULICS
INTERNAL COMBUSTION ENGINES
MECHANICS
OPERATION
PRESSURE DEPENDENCE
PUMPS