Injection valve comprising a transmission unit

An injection valve for injecting fuel into an internal combustion engine, comprising:

• an actuator,
• a nozzle needle associated with a sealing seat, and
• a transmission unit that establishes an effective connection between the actuator and the nozzle needle,
• a sleeve-shaped movable pot,
• wherein the transmission unit includes a pressure chamber bounded by first and second movable pistons which are guided in the sleeve-shaped movable pot,
• wherein a connecting part is fixed to one end of the sleeve-shaped movable pot to form a pot/connecting part assembly,
• wherein an end portion of the nozzle needle includes a notch that receives the connecting part such that the nozzle needle is secured to the pot/connecting part assembly by a mechanical coupling, such that movement of the sleeve-shaped section in a first direction away from the sealing seat physically lifts the nozzle needle, via the mechanical coupling, in the first direction away from the sealing seat, and
• wherein the actuator, first piston, second piston, and sleeve-shaped section of the pot are operatively connected such that actuation of the actuator forces the first piston in a first direction toward the sealing seat, which thereby acts on a fluid in the pressure chamber of the transmission unit in a manner that forces the sleeve-shaped section of the pot the first direction away from the sealing seat, to thereby lift the nozzle needle, via the mechanical coupling, from the sealing seat.

An internal combustion engine comprising:

• at least one cylinder, and
• at least one injection valve for injecting fuel into the at least one cylinder, each injection valve comprising:
• an actuator,
• a nozzle needle associated with a sealing seat, and
• a transmission unit that establishes an effective connection between the actuator and the nozzle needle,
• wherein the transmission unit includes a pressure chamber bounded by first and second movable pistons which are guided in a movable pot,
• wherein the first piston is operatively connected to the actuator and guided through a bottom of the pot,
• wherein the second piston is operatively connected to the nozzle needle and guided in a sleeve-shaped section of the pot,
• wherein the nozzle needle is coupled to the sleeve-shaped section of the pot by a mechanical coupling such that movement of the sleeve-shaped section in a first direction away from the sealing seat physically lifts the nozzle needle, via the mechanical coupling, in the first direction away from the sealing seat, and
• wherein the actuator, first piston, second piston, and sleeve-shaped section of the pot are operatively connected such that actuation of the actuator forces the first piston in a second direction toward the sealing seat, which thereby acts on a fluid in the pressure chamber of the transmission unit in a manner that forces the sleeve-shaped section of the pot the first direction away from the sealing seat, to thereby lift the nozzle needle, via the mechanical coupling, from the sealing seat.