Patent ID: 7077379
Filing Date: 2006-07-18
Classification: F02M,F16K

Abstract:
1. A fuel injection system, comprising: an outlet port; a valve which is movable along a path between a first position and a second position, said outlet port being blocked by said valve when said valve is in said first position, said outlet port being unblocked by said valve when said valve is in said second position; a first piezoelectric device disposed in force transmitting association with said valve to selectively move said valve along said path; a pressure chamber; and a second piezoelectric device disposed in pressure affecting association with said pressure chamber, whereby movement of said second piezoelectric device changes the pressure of a fuel within said pressure chamber by exerting a force on said fuel within said pressure chamber and movement of said valve under the influence of said first piezoelectric device causes said fuel, which is pressurized within said pressure chamber, to flow from said pressure chamber and through said outlet port; wherein said second piezoelectric device is a transducer exerting a force directly on the fuel within the pressurization chamber to create the pressurized fuel.