Control device for switching intake and exhaust valves of internal combustion engines
AssigneeHydraulik-Ring GmbH
InventorsBernd Niethammer, Ulrich Augustin
Life of this patent
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Abstract
A control device for switching an intake or exhaust valve of an internal combustion engine has a control valve with a control valve piston for controlling flow of a hydraulic medium from a pressure line to the intake or exhaust valve. At least one actuating element is correlated with the intake or exhaust valve and has a first end acted on by the hydraulic medium. At least one damping device interacts with the at least one actuating element and is arranged at a second end of the actuating element opposite the first end. The at least one damping device exerts a damping force onto the actuating element counteracting a force exerted by the hydraulic medium.
Claims24
A control device for switching an intake or exhaust valve of an internal combustion engine, the control device comprising:
- a control valve comprising a control valve piston configured to control flow of a hydraulic medium from a pressure line to the intake or exhaust valve;
- at least one actuating element correlated with the intake or exhaust valve and having a first end acted on by the hydraulic medium;
- at least one damping device interacting with the at least one actuating element and arranged at a second end of the actuating element opposite the first end, wherein the at least one damping device is configured to exert a damping force onto the actuating element counteracting a force exerted by the hydraulic medium;
- wherein the control valve has a first pressure chamber located at a first end of the control valve piston and a second pressure chamber communicating with the first pressure chamber via a bore, wherein a valve element is provided and has a closing position for closing off the bore.
A control device for switching an intake or exhaust valve, of an internal combustion engine, the control device comprising:
- a control valve comprising a control valve piston configured to control flow of a hydraulic medium from a pressure line to the intake or exhaust valve;
- at least one actuating element correlated with the intake or exhaust valve and having a first end acted on by the hydraulic medium;
- at least one damping device interacting with the at least one actuating element and arranged at a second end of the actuating element opposite the first end, wherein the at least one damping device is configured to exert a damping force onto the actuating element counteracting a force exerted by the hydraulic medium;
- wherein the control valve has relief bores configured such that the control valve piston is surrounded by the hydraulic medium and ambient air cannot penetrate into the control valve.
Dependencies are inferred from the claim text.