Device for controlling rotational speed of internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMasanobu Kanamaru, Satoru Watanabe, Hidemi Onaka
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Abstract
An engine speed control unit of an internal combustion engine for controlling an engine speed so that it can reach a target value, changes the engine speed so that it can reach a target value in a period of time from the completion of the initial combustion of the engine starting to the idling steady state. The after-start engine speed peak actual value “gnepk”, which is an engine speed in the idling state in a predetermined period of time from the start of the engine, is calculated, and the after-start engine speed peak target value “tnepk” is read in from the map, and the ratio “rnepk” is found. When the ratio “rnepk” is out of the target range, it can be considered that the burning state is bad.
Claims28
An engine speed control unit of an internal combustion engine for controlling an engine speed so that it can reach a target, comprising:
- a first engine speed control means for controlling the engine speed by changing a quantity of suction air;
- a second engine speed control means for controlling the engine speed by changing a control value of a control parameter except for the quantity of suction air;
- and
- means for judging a burning state,
- wherein in the case of a good burning state the engine speed is controlled by the first engine speed control means, and in the case of a bad burning state, the engine speed control by the first engine speed control means is stopped and the engine speed is controlled by the second engine speed control means.
Dependencies are inferred from the claim text.