Method and Control Device for Triggering Solenoid Valves Assigned to Gas-Exchange Valves
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Abstract
A method for triggering solenoid valves assigned to gas-exchange valves in an electrohydraulic valve activation of an internal combustion engine having a plurality of combustion chambers. The solenoid valves assigned to the gas-exchange valves may be activated independently of each other. To this end, crankshaft-synchronous trigger signal for solenoid valves of the internal combustion engine are ascertained in a control unit and transmitted to an output stage. The output stage controls the solenoid valves on the basis of the transmitted trigger signals. Each combustion chamber of the internal combustion engine has at least one intake valve and at least one discharge valve as gas-exchange valve. All solenoid valves of all gas-exchange valves of a combustion chamber form a solenoid-valve set. One activation profile in each case is specified for all solenoid valves of a solenoid valve set. In the control unit, a crankshaft-synchronous activation signal is ascertained for each combustion chamber and supplied to the output stage. The output stage triggers the solenoid valves of the solenoid-valve set on the basis of the activation signal of the cylinders according to the activation profile stored for the individual solenoid valve.
34 Citations
33 Claims
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1-15. -15. (canceled)
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16. A method for triggering solenoid valves assigned to gas-exchange valves in an electrohydraulic valve actuation of an internal combustion engine having a plurality of combustion chambers, each of the gas-exchange valves having at least one intake valve and at least one discharge valve, all solenoid valves of all gas exchange valves of a combustion chamber forming a solenoid valve set, the method comprising:
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activating the solenoid valves assigned to the gas-exchange valves independently of each other; ascertaining at least crankshaft-synchronous trigger signals for solenoid valves of the internal combustion engine in a control device and transmitting the ascertained trigger signals to an output stage; triggering, by the output stage, the solenoid valves based on the transmitted trigger signals; specifying an activation profile for all solenoid valves of each of the solenoid valve sets; ascertaining, in a control device, a crankshaft-synchronous activation signal for each combustion chamber and supplying the ascertained activation signal to the output stage; and activating, by the output stage, the solenoid valves based on the activation signal according to the activation profile specified for each of the solenoid valves. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 30)
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28. A circuit system for the triggering of solenoid valves assigned to gas-exchange valves, comprising:
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a control unit configured to ascertain activation trigger signals for the activation of the solenoid valves; an output stage, activation trigger signals being transmitted by the control unit to the output stage via lines, a triggering of the solenoid valves being implemented in the output stage; a data line arranged between the control unit and the output stage for the transmission of activation profiles, the output stage of solenoid valves; and activation-signal lines arranged between the control unit and the output stage, crankshaft-synchronous activation of actuation of the solenoid valves of cylinders in response to activation signals. - View Dependent Claims (29, 31, 32, 33)
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Specification