Locking unit with pilot valve

Abstract

A locking unit can include: a housing having a fluid inlet and a fluid outlet which are connectable to a coolant circuit, and a pilot pressure chamber; a fluid duct which fluidically connects the fluid inlet to the pilot pressure chamber; a solenoid; a piston; a pilot valve, wherein an armature and/or an armature rod of the solenoid adjusts the pilot valve between a pilot valve open position which releases the fluid duct and a pilot valve closed position which closes the fluid duct; and a main valve, wherein a fluid pressure in the pilot pressure chamber adjusts the main valve between a main valve open position which releases the fluid outlet and a main valve closed position which closes the fluid outlet. The locking unit can lock the movement of the piston impingeable with pressure of fluid of the coolant circuit.

Dependencies are inferred from the claim text.