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OwnerLars Pfützenreuter, Dirk Neubauerinventors
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The invention relates to a method for operating an internal combustion engine with autoignition capability using a first, autoignitable fuel and a second, non-autoignitable fuel. A self-igniting operation of said type is made considerably simpler in relation to the prior art by means of the following method steps: a) detecting a setpoint value change for the operation of the internal combustion engine which requires an increase of the fuel flow rate to be supplied to the internal combustion engine, b) increasing the flow rate of the first fuel supplied to the internal combusion engine to a value that effects a follow-up adjustment of the actual value associated with a setpoint value, wherein the supplied flow rate of the second fuel initially remains unchanged, c) newly calculating and controlling the flow rates of the first and second fuels to be supplied to the internal combustion engine such that the actual value continues to correspond to the setpoint value and the flow rate of the first fuel is reduced in relation to the flow rate determined in step b) but remains high enough to effect autoignition of the mixture of first and second fuel and air.
Method for operating an auto-igniting internal combustion engine with a first auto-igniting fuel and a second non-auto-igniting fuel comprising the following method steps:
Engine control device for operating an auto-igniting internal combustion engine with a first auto-igniting fuel and a second non-auto-igniting fuel wherein the engine control comprises a signal input for a set point value for operating the internal combustion engine, means to regulate the amount of the first fuel fed to the internal combustion engine as a function of the set point value and means to calculate and control the amounts of the first and second fuels to be fed to the internal combustion engine such that the actual value corresponds with the set point value and the amount of the first fuel is sufficiently large to effect auto-ignition of the mixture of first and second fuel with air, wherein the engine control device is configured such that, when a set point value is changed which requires an increase in the amount of fuel to be fed to the internal combustion engine, first the supply of the amount of first fuel is increased and, only when this is concluded, a new apportionment of the air-fuel mixture regarding first and second fuel is redetermined and regulated, wherein the amount of the first fuel is reduced but is still sufficiently large to effect auto-ignition of the mixture of first and second fuel with air.
Dependencies are inferred from the claim text.