Integrated fuel delivery module for direct injection

A fuel delivery module integrates a fuel rail, with its associated connections, features and components, with the injectors for one bank of a direct injection engine. When the module is secured to the engine, loading springs between the inlet ends of the injectors and abutments in the mounting recesses accommodate variations in manufacturing and assembly tolerances to provide adequate but not excessive loading of the injectors against associated seats of the engine. Manufacturing and assembly costs are reduced by the use a module with injectors pre-installed. Also, the module may be pretested in a suitable test fixture prior to installation to assure proper flow and spray development from each of the injectors. The module may integrate other components also, such as intake air passages, EGR passages and coolant passages and their associated components. Various examples of injector loading springs are described.