Fuel injection system for an internal combustion engine
US4499878A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1983 |
| Grant date | Feb 19, 1985 |
| Priority date | — |
| Expiry date | Oct 21, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection system for an internal combustion engine includes a unit injector for compressing the fuel and injecting a predetermined amount of the fuel and an electronic control device. The unit injector includes a piezoelectric actuator, a piston, and an injection valve. The piezoelectric actuator comprises a columnar laminated body of disk-shaped piezoelectric elements. The laminated body is expanded or compressed in the axial direction of the column according to the application of positive or negative high voltage. The electronic control device controls the frequency of the voltage supplied to the actuator and controls accordingly the amount of fuel injection in accordance with the frequency of the voltage supplied to the actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.