Length-adjustable piston rod with a control device that can be hydraulically actuated and a switching valve that can be electromagnetically actuated, a reciprocating piston engine and a vehicle

A reciprocating piston internal combustion engine, comprising:

• a piston rod with a length that is adjustable;
• a length adjustment device operable to adjust an effective length of the piston rod;
• a control device that is hydraulically actuatable and which can be switched between at least two control states for controlling the length adjustment;
• and
• a hydraulic switching valve that is electromagnetically actuatable for hydraulic actuation of the control device,
• wherein the hydraulic switching valve can be actuated inductively and is electrically switchable, wherein the piston rod comprises an induction device for inductively actuating the hydraulic switching valve, and wherein the hydraulic switching valve is electrically connected or can be electrically connected to the induction device.

A vehicle with a reciprocating piston internal combustion engine, comprising:

• a piston rod having an adjustable length;
• a length adjustment device operable to adjust an effective length of the piston rod;
• a control device that is hydraulically actuatable and which can be switched between at least two control states for controlling the length adjustment;
• and
• a hydraulic switching valve that is electromagnetically actuatable for hydraulic actuation of the control device,
• wherein the hydraulic switching valve can be actuated inductively and is electrically switchable, wherein the piston rod comprises an induction device for inductively actuating the hydraulic switching valve, and wherein the hydraulic switching valve is electrically connected or can be electrically connected to the induction device.