Manufacture of piezoelectric actuator for fuel injection system in internal combustion engine, by separating piezoceramic multilayers from base material using water jet cutting

摘要

The actuator (1) is formed as a multilayer structure comprising a piezoceramic (2) with intermediate internal electrodes (3,4) which are connected to external electrodes (5,6) on alternate sides. The individual multilayers of piezoceramic are separated from the base material of the piezoceramic by abrasive water-jet cutting. The multilayers may be separated from a base material provided with internal electrodes and sintered. An independent claim is included for the use of a multilayer piezo-actuator as part of a fuel injection system for an internal combustion engine.