Drive module for piezoelectric injector of internal combustion engine, has piezoelectric actuator with stack which is formed of multiple material layers and multiple electrode layers

摘要

The drive module (10) has a piezoelectric actuator (20) with a stack (21) which is formed of multiple material layers and multiple electrode layers. Each material layer is arranged between two electrode layers. A housing receives the piezoelectric actuator. The housing components are combined with a mechanical and a temperature compensating functions. Both the functions of the housing are decoupled from each other. The piezoelectric actuator is connected with one or multiple components for providing the temperature compensating function of the housing. An independent claim is included for a piezoelectric injector with a nozzle module for use in a petrol engine.