Engine control method for protecting an internal combustion engine during reverse rotation
AssigneeVitesco Technologies GmbH
InventorsStéphane Eloy, Jérémie Memain
Life of this patent
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Abstract
Engine control method for protecting the engine during reverse rotation, and involving the following steps: when a first prediction of the engine speed at a next top dead center is below a predetermined lower threshold, inhibiting the next combustion for this cylinder of the engine, and when the first prediction of the engine speed is between the predetermined lower threshold and a predetermined upper threshold, and the engine reaches a second measurement predetermined angular position which is subsequent to the first measurement position, activating the prediction means again in order to obtain a second prediction of the engine speed at the next top dead center.
Claims12
An engine control method for protecting an internal combustion engine during reverse rotation, the internal combustion engine comprising:
- a sensor configured to determine the angular position of the engine, this angular position being defined as being the angular position of the crankshaft of the engine;
- an engine control unit configured to predict, at a first angular position of the engine, the engine speed for a future second angular position of the engine;
- the method comprises, for each cylinder of the engine:
- when the engine reaches a first measurement predetermined angular position, obtaining a first prediction of the engine speed at the next top dead center;
- when the first prediction of the engine speed is above a predetermined upper threshold, executing the next combustion for this cylinder of the engine,
- when the first prediction of the engine speed is below a predetermined lower threshold, inhibiting the next combustion for this cylinder of the engine;
- and
- when the first prediction of the engine speed is between the predetermined lower threshold and the predetermined upper threshold, and the engine reaches a second measurement predetermined angular position which is subsequent to the first measurement predetermined angular position, obtaining a second prediction of the engine speed at said next top dead center.
Dependencies are inferred from the claim text.