Abstract: An electromagnetically actuated injector, for the injection of fluid in internal combustion engines in particular, comprises a casing, a core located within the casing, an actuating coil surrounding the core, a fluid inlet passage, a chamber between the core and a cover. The injector contains a ball which cooperates with a seat to close the injection passage formed in the cover, said ball being attracted by the actuating coil against an elastic system mounted in front of the core and which urges the ball against its seat. The injector includes a disk interposed between the core and the ball, the disk surface facing the ball being coated with a thin layer of nonmagnetic material, a seat with a circular working surface, a funnel-shaped nozzle for automatic fluid-flow regulation, and an injection tip provided with spiral inclines to create a cone-shaped spray at the outlet of the injection nozzle. Application is to fuel injection in the internal combustion engines of automotive vehicles.

Abstract: A hydraulic generator with a free-piston engine and hydropneumatic return cushion and with an associated hydraulic-fluid pumping piston feeding a hydraulic accumulator intended to be charged between two detected levels of pressure. The generator includes a lock device for the free piston at the power-stroke dead center with voluntary control, and servo-control means for this lock device with means for detection of the aforementioned two pressure levels, to assure locking the piston in response to detection of the aforementioned highest pressure level and to assure its unlocking in response to detection of the aforementioned lowest pressure level, and thus an automatic intermittent running of said engine.