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AssigneeRobert Bosch GmbH
InventorsSteffen Franke, Oskar Torno, Axel Heinstein, Carsten Kluth, Werner Haeming, Michael Baeuerle
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The invention relates to a method for knock control of an internal combustion engine, a knock detection being carried out on the cylinders of the internal combustion engine and a moment of ignition being retarded by a specifiable value as a function of detected knocking combustion in at least one of the cylinders, the system including at least two evaluation electronics and at least one cylinder being assigned to each of these evaluation electronics, and the knock sensor signals assigned to the cylinders being evaluated by the evaluation electronics assigned in each case, and the knock detection and the specification of the moment of ignition being effected by a control electronics, and the evaluation electronics being monitored for functionality. It is provided that, upon detection of a malfunction of at least one of the evaluation electronics (30), the at least one cylinder (12, 14) assigned to this evaluation electronics is linked to the control of at least one cylinder having intact evaluation electronics (32).
A method for knock control of an internal combustion engine, a knock detection being carried out on the cylinders of the internal combustion engine and a moment of ignition being retarded by a specifiable value as a function of detected knocking combustion in at least one of the cylinders, the system including at least two evaluation electronics and at least one cylinder being assigned to each of these evaluation electronics, and the knock sensor signals assigned to the cylinders being evaluated by the evaluation electronics assigned in each case, and the knock detection and the specification of the moment of ignition being effected by a control electronics, and the functionality of the evaluation electronics being monitored,
The method as recited in one of the preceding claims, wherein at least one cylinder (16, 18) is used as a guide cylinder, and from the ignition angle or timing retard of the at least one selected guide cylinder (16, 18), an ignition angle is specified from which the ignition angles of the guided cylinders (12, 14) are derived.
The method as recited in one of the preceding claims, wherein a retard of the ignition angle is effected for the guide cylinder (16, 18) and for the guided cylinders (12, 14) in response to a knock event in a guide cylinder (16, 18).
The method as recited in one of the preceding claims, wherein a safety offset away from the knock limit is applied to the ignition angle of the at least one guide cylinder (16, 18) to determine the ignition angles of the guided cylinders (12, 14).
The method as recited in one of the preceding claims, wherein the ignition timing of the guided cylinders (12, 14) is retarded in several small steps following a knock event in the guide cylinder (16, 18).
The method as recited in one of the preceding claims, wherein the ignition timing of the guided cylinders (12, 14) is retarded in a single step following a knock event in the guide cylinder (16, 18).
The method as recited in one of the preceding claims, wherein the cylinder that has the largest, the smallest or an average retard of the ignition angle is used as a guide cylinder (16, 18).
The method as recited in one of the preceding claims, wherein the cylinder that is determined in an initial setting (application) of the ignition system is used as guide cylinder (16, 18).
Dependencies are inferred from the claim text.