Ignition system
AssigneePRUEFREX engineering e motion GmbH & Co. KG
InventorMarek Lajda
Life of this patent
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Abstract
An ignition system of a combustion engine has a start-up adjustment curve with a maximum rotational speed, an operating adjustment curve and a switch-over device for switching between curves. The start-up adjustment curve is selected in the case of a start-up of the combustion engine. A rotational speed curve is divided into adjacent cycles. The start of the first cycle is the point in time of the second ignition after the start-up and the start of the subsequent cycles is in each case the point in time of ignition at which the rotational speed is less than in the case of the subsequent point in time of ignition. The criterion for switching to the operating adjustment curve is whether the average of the rotational speeds of successive cycles differs by less than a first tolerance value.
Claims10
An ignition system of a combustion engine, the ignition system comprising:
- a start-up adjustment curve including a maximum rotational speed, an operating adjustment curve, and a switch-over device for switching over between the start-up adjustment curve and the operating adjustment curve, and wherein:
- the start-up adjustment curve is selected on occasion of a start-up of the combustion engine;
- a rotational speed curve of the combustion engine is divided into adjacent cycles, including a first cycle and subsequent cycles;
- a start of the first cycle is a second point in time of ignition after the start-up of the combustion engine and a start of subsequent cycles is in each case a point in time of ignition at which the rotational speed is less than at a following point in time of ignition;
- and
- a criterion for switching over into the operating adjustment curve is whether a difference between the averages of the rotational speeds of successive cycles is less than a first tolerance value.
A method of operating an ignition system of a combustion engine, the ignition system having a start-up adjustment curve defining a maximum rotational speed of the combustion engine and an operating adjustment curve, and the method comprises:
- selecting the start-up adjustment curve in case of a start-up of the combustion engine;
- ascertaining a rotational speed curve of the combustion engine after the start-up;
- as a first condition, performing a check, while the engine is operated using the start-up adjustment curve, as to whether the rotational speed continuously increases within a first number of points of time of ignition of the combustion engine;
- blocking a switch-over to the operating adjustment curve if the first condition is positive;
- only if the first condition is negative, as a second condition, performing a check as to whether the rotational speed continuously decreases within a second number of points in time of ignition of the combustion engine, and selecting the operating adjustment curve if the second condition is positive.
Dependencies are inferred from the claim text.