Device for controlling charge exchange valves
A device is proposed for controlling gas-exchange valves, at least one of which is assigned as intake valve ( 11 ) and at least one of which as discharge valve ( 12 ) to a combustion chamber of an internal combustion engine. The internal combustion engine includes electrohydraulic valve actuators (...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A device is proposed for controlling gas-exchange valves, at least one of which is assigned as intake valve (
11
) and at least one of which as discharge valve (
12
) to a combustion chamber of an internal combustion engine. The internal combustion engine includes electrohydraulic valve actuators (
18
) assigned in each case to a gas-exchange valve for its actuation, and a pressure-supply reservoir (
26
) having a high-pressure pump and a pressure-storage unit, which supplies the valve-actuators (
18
) with a fluid at high pressure. To reduce the energy consumed by the control device, the pressure-storage unit has two separate high-pressure reservoirs (
31, 32
), one of which is connected to the valve actuator (
18
) for the at least one intake valve (
11
) and the other to the valve actuator (
18
) for the at least one discharge valve (
12
). With the aid of a switching member (
30
), the high-pressure pump (
27
) is alternatively able to be connected to one or the other high-pressure reservoir (
31, 32
) and to a return line (
37
) leading to a fluid reservoir (
29
). |
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