Combustion state detection system for internal combustion engine
AssigneesHitachi, Ltd., Hitachi Car Engineering Co., Ltd.
InventorsEisaku Fukuchi, Akihito Numata, Takanobu Ichihara
Life of this patent
Estimating the term…
Abstract
A combustion state detection system for an internal combustion engine, in which the engine combustion state is detected by the combustion state parameter calculated from a time signal associated with the rotation of the crankshaft by a predetermined angle. The system comprises a device for compensating for the combustion state parameter and a combustion state parameter compensating permitting condition determining device for permitting or inhibiting the execution of the combustion state parameter compensation device.
Claims9
A combustion state detection system for an internal combustion engine of a vehicle for detecting a combustion state of the internal combustion engine on the basis of at least a combustion state parameter calculated from a time signal associated with rotation of a crankshaft by a predetermined rotational angle, comprising:
- compensating means for compensating said combustion state parameter, said compensating means including a model for canceling a vibration of the combustion state parameter due to resonance with an inherent vibration frequency of a body of the vehicle;
- and
- combustion state parameter compensation permitting condition determining means for permitting or inhibiting functioning of said compensating means for said combustion state parameter.
Dependencies are inferred from the claim text.