Injection valve with direct and servo drive

An internal combustion engine comprising:

• a combustion chamber, and
• an injection valve for injecting fuel into the combustion chamber, the injection valve comprising:
• a housing,
• a valve needle arranged such that it can be deflected in a valve needle chamber of the housing, and
• a drive device for the valve needle, the drive device comprising:
• a direct electric drive component piezo stack which effects a direct deflection of the valve needle, and
• an activatable hydraulic drive component configured to cause a deflection of the valve needle, the hydraulic drive component comprising a servo valve connecting the valve needle chamber to a low-pressure duct, the servo valve comprising a valve element moveable from a closed position into an open position by the expansion of the direct electric drive component piezo stack,
• wherein the expansion of the direct electric drive component piezo stack leads to an activation of the hydraulic drive component after an activation threshold is overcome, the activation threshold defined by a distance the direct electric drive component must move to close a space separating components of a mechanical linkage from the direct electric drive component to the valve element.

A valve apparatus for delivering a liquid, comprising:

• a housing,
• a valve needle arranged such that it can be deflected in a valve needle chamber of the housing, and
• a drive device for the valve needle, the drive device comprising:
• an electric drive component which effects a direct deflection of the valve needle,
• an activatable hydraulic drive component configured to cause a deflection of the valve needle, the hydraulic drive component comprising a servo valve connecting the valve needle chamber to a low-pressure duct, the servo valve comprising a valve element moveable from a closed position into an open position by the deflection of the electric drive component,
• wherein the deflection of the electric drive component leads to an activation of the hydraulic drive component after an activation threshold is overcome, the activation threshold predefined by a tolerance in a mechanical transmission path from the electric drive component to the valve element, the mechanical transmission path from the electric drive component to the valve element comprises at least one mechanical transmission element which transmits the deflection of the electric drive component to the valve element of the hydraulic drive component, the transmission element having a pin-like form.