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US 2004/0153286 A1Published application
Electronic control unit
AssigneeDenso Corporation
InventorFujiki Yamada
Life of this patent
Estimating the term…
Abstract
In an electronic control unit having two computers, the first computer, which is an engine control microcomputer, performs multiple diagnoses and sends data regarding the diagnoses to the second computer, which is a throttle control microcomputer. The data includes a transmission ID, a calculated value and a reference value. The throttle control microcomputer directly monitors completion of the diagnoses based on the data.
Claims9
An electronic control unit comprising a first computer and a second computer, characterized in that:
- the first computer includes a first diagnostic means for diagnosing operation of the first computer by performing a first diagnosis and a second diagnosis, in which a first value and a second value are calculated using at least two kinds of operations, a first comparison is performed between the first value and a pre-stored first reference value for determining whether a relationship between the first value and the first reference value is normal, and a second comparison is performed between the second value and a pre-stored second reference value for determining whether a relationship between the second value and the second reference value is normal;
- the first computer further includes a data transmitting means for sending a first set of diagnostic data regarding the first diagnosis and a second set of diagnostic data regarding the second diagnosis, respectively;
- the second computer includes a data receiving means for receiving the first set and the second set of diagnostic data;
- and
- the second computer further includes a second diagnostic means for determining whether the first diagnostic means normally operates based on the first and the second diagnostic data.
2 more elements
An electronic control unit comprising a first computer and a second computer, characterized in that:
- the first computer includes a first diagnostic means for diagnosing operation of the first computer by performing a diagnosis, in which a comparison is performed between a value calculated using a predetermined operation and a pre-stored reference value for determining whether a relationship between the calculated value and the pre-stored reference value is normal;
- the first computer further includes a data transmitting means for sending the calculated value and the pre-stored reference value used for the diagnosis performed by the first diagnostic means;
- the second computer includes a receiving means for receiving the calculated value and the pre-stored reference value;
- and
- the second computer further includes a second diagnostic means for determining whether the first diagnostic means normally operates based on a comparison between the calculated value and the pre-stored reference value received by the receiving means.
2 more elements
Dependencies are inferred from the claim text.