Device for controlling the compression rate of a variable compression ratio engine, comprising a two-way solenoid valve provided with a secondary circuit for fluid refilling

A solenoid valve, comprising:

• two valve assemblies each for controlling the flow of a fluid supplied under pressure by a pressure accumulator, each valve assembly having a valve body comprising a longitudinal channel with an axis communicating with at least two fluid circuits;
• and
• a valve arrangement comprising a piston movably mounted within the longitudinal channel between a fluid circuit opening position to allowing the fluid to pass from one fluid circuit to another and a fluid circuit closing position relative to each other, the piston comprising a magnetizable end portion and an end, opposite the magnetizable end portion, forming a valve adapted to rest against a seat to cause the closing position, and a single electromagnetic actuator adapted to simultaneously control the displacement of the piston of each valve assembly into the opening position of the fluid circuits, the actuator, interposed between the two valve assemblies, comprising an electromagnetic coil having a coil bore housing a stationary magnetizable target extending opposite the magnetizable end portions of the pistons of each valve assembly, wherein at least one of the fluid circuits of the solenoid valve comprising a bypass conduit provided with a non-return valve arranged to block the flow of fluid toward the accumulator.