Booster
AssigneeDenso Corporation
InventorKunihiko Matsuda
Life of this patent
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Abstract
A booster is mounted on a vehicle having an idle stop function. The booster boosts an input voltage supplied from a battery, and outputs the boosted input voltage to an in-vehicle device. The booster includes a booster circuit and an output voltage sensor. The booster circuit is a chopper-type, and includes a reactor having one end connected to the battery and a switching element connected between an other end of the reactor and a ground. The output voltage sensor detects an output voltage of the booster circuit.
Claims3
A booster that is mounted on a vehicle having an idle stop function, configured to boost an input voltage supplied from a battery and output the input voltage, which is boosted, to an in-vehicle device, the booster comprising:
- a booster circuit that is a chopper-type, and includes a reactor having one end connected to the battery and a switching element connected between an other end of the reactor and a ground;
- an output voltage sensor configured to detect an output voltage of the booster circuit;
- a booster circuit control unit configured to control an operation of the switching element such that the output voltage of the booster circuit becomes a target voltage;
- and
- a failure detection unit configured to determine that the switching element is in an open failure when the output voltage is less than a predetermined failure detection threshold value in an initial check of the booster, wherein
- at least in a region where the input voltage is higher than a predetermined critical value, a target voltage in the initial check is set higher than a target voltage in a normal control that is an operation other than the initial check.
Dependencies are inferred from the claim text.