Patent ID: 7472017
Filing Date: 2008-12-30
Classification: F01L,F02D,Y02T

Abstract:
1. 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: 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.