US 2023/0064359 A1 · ELECTRONIC CONTROL DEVICE

Abstract

An electronic control device is configured to control at least one electromagnetic valve mounted on a vehicle. The electronic control device includes a regenerative current detector configured to detect a regenerative current circulating through the at least one electromagnetic valve immediately after power supply to the at least one electromagnetic valve is stopped. The electronic control device further includes a regenerative current singularity detector configured to detect a regenerative current singularity that is a singularity in a temporal change of the regenerative current. The electronic control device further includes a regenerative current failure detector configured to detect a stuck failure of the at least one electromagnetic valve based on a detection result of the regenerative current singularity detector.

Claims11

Dependent claims

An electronic control device configured to control at least one electromagnetic valve mounted on a vehicle, the electronic control device comprising:

a regenerative current detector configured to detect a regenerative current circulating through the at least one electromagnetic valve immediately after power supply to the at least one electromagnetic valve is stopped;
a regenerative current singularity detector configured to detect a regenerative current singularity that is a singularity in a temporal change of the regenerative current;
and
a regenerative current failure detector configured to detect a stuck failure of the at least one electromagnetic valve based on a detection result of the regenerative current singularity detector.

1 more element

An electronic control device configured to control at least one electromagnetic valve mounted on a vehicle, the electronic control device comprising:

an electromagnetic valve current detector configured to detect an electromagnetic valve current flowing through the at least one electromagnetic valve after power supply to the at least one electromagnetic valve is started;
a power supply voltage detector configured to detect a power supply voltage of a direct-current power supply that is configured to apply the power supply voltage to the at least one electromagnetic valve;
an electromagnetic valve current singularity detector configured to detect an electromagnetic valve current singularity that is a singularity in a temporal change of the electromagnetic valve current;
an electromagnetic valve current failure detector configured to detect a stuck failure of the at least one electromagnetic valve based on a detection result of the electromagnetic valve current singularity detector;
and
a failure detection inhibitor configured to
determine whether a fluctuation in the power supply voltage has occurred based on a detection result of the power supply voltage detector and
on determination that the fluctuation in the power supply voltage has occurred, inhibit the electromagnetic valve current failure detector from detecting the stuck failure until a preset inhibition release condition is satisfied.

5 more elements

Dependencies are inferred from the claim text.

Electronic control device

Life of this patent

Electronic control device

Life of this patent

Abstract

Claims11