Injection control device
AssigneeDenso Corporation
InventorMasashi Inaba
Life of this patent
Estimating the term…
Abstract
An injection control device includes: a boost controller charging a boost capacitor by performing a boost switching control of a boost switch, and supplying a boost power from a battery power source; and a boost voltage monitor monitors a boost voltage. The boost controller measures a number of times of when the boost voltage becomes equal to or higher than a predetermined value due to a boost current flowing into the boost capacitor, causing a jump of the boost voltage during a time between a start and stop of boosting, and determines deterioration of the boost capacitor by comparing the measured number of times (i.e., the number of jumps) with a predetermined number of times.
Claims14
An injection control device comprising:
- a boost controller configured to charge a boost capacitor by performing a boost switching control of a boost switch, and supplying a boost power from a battery power source;
- and
- a boost voltage monitoring circuit configured to monitor a boost voltage, wherein
- the boost controller (i) is configured to measure, as a measured number of times, a number of times of when the boost voltage becomes equal to or higher than a predetermined value due to a boosting current flowing into the boost capacitor, causing a jump up of the boost voltage during a time between a start and stop of boosting, and (ii) is configured to determine deterioration of the boost capacitor by comparing the measured number of times with a predetermined number of times.
A device comprising:
- a processor;
- and
- a non-transitory computer-readable memory,
- wherein the device is configured to:
- control a boost switch in a boost circuit;
- measure a boost current in a current detection resistor;
- generate a boost voltage;
- generate a first filtered boost voltage using a first low pass filter;
- increment a jump counter;
- determine that the first filtered boost voltage is less than or equal to a start boost voltage;
- start boosting;
- determine that the boost voltage is greater than or equal to a jump determination threshold voltage;
- increment the jump counter;
- continue boosting;
- determine that the first filtered boost voltage is greater than or equal to a stop boost voltage;
- stop boosting;
- determine that the jump counter is greater than or equal to a deterioration determination threshold;
- determine that a boost capacitor has deteriorated;
- and
- perform at least one measure to reduce future deterioration of the boost capacitor.
A device comprising:
- a processor;
- and
- a non-transitory computer-readable memory,
- wherein the device is configured to:
- control a boost switch in a boost circuit;
- measure a boost current in a current detection resistor;
- generate a boost voltage;
- generate a first filtered boost voltage using a first low pass filter;
- increment a jump counter;
- generate a second filtered boost voltage using a second low pass filter, wherein the second low pass filter is not identical to the first low pass filter;
- determine that the first filtered boost voltage is less than or equal to a start boost voltage;
- start boosting;
- determine that the second filtered boost voltage is greater than or equal to a jump determination threshold voltage;
- increment the jump counter;
- continue boosting;
- determine that the first filtered boost voltage is greater than or equal to a stop boost voltage;
- stop boosting;
- determine that the jump counter is greater than or equal to a deterioration determination threshold;
- determine that a boost capacitor has deteriorated;
- and
- perform at least one measure to reduce future deterioration of the boost capacitor.
Dependencies are inferred from the claim text.