Method and device for monitoring an interval between two injection operations
AssigneeRobert Bosch GmbH
InventorMichael Heinzelmann
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Abstract
A device and a method for monitoring an interval between a first injection operation and a second injection operation of a combustion cycle in a cylinder of an internal combustion engine are described, in which it is determined whether an electrical actuator element has fully opened after the first injection operation and in which it is determined whether energizing sequences of the electrical actuator element overlap. Then, the interval between the first injection operation and the second injection operation is modified as a function of the determination results of the preceding determination operations.
Claims16
A method of monitoring an interval ([t9−t2]) between a first injection operation and a second injection operation of a combustion cycle in a cylinder of an internal combustion engine in which the individual injection operations are controlled by an electrical actuator element, comprising the following steps:
- determining whether the actuator element (12, 13) has fully opened after the first injection operation;
- determining whether the energizing sequences (27, 28) of the electrical actuator element (12, 13) for the first injection operation and for the second injection operation overlap;
- and
- modifying the interval ([t9−t2]) if the electrical actuator element (12, 13) has not fully opened after the first injection operation or if the energizing sequences (27, 28) of the electrical actuator element (12, 13) overlap.
A device for monitoring an interval ([t9−t2]) between a first injection operation and a second injection operation of a combustion cycle in a cylinder of an internal combustion engine in which the individual injection operations are controlled by an electrical actuator element (12, 13), comprising:
- a determining device (22) for determining whether the electrical actuator element (12, 13) has fully opened after the first injection operation and for determining whether energizing sequences (27, 28) of the electrical actuator element (12, 13) for the first injection operation and for the second injection operation overlap;
- and
- an interval modifying device (25) for modifying the interval ([t9−t2]) if the electrical actuator element (12, 13) has not fully opened after the first injection operation or if the energizing sequences (27, 28) of the electrical actuator element (12, 13) overlap.
Dependencies are inferred from the claim text.