Failure determination device for shutter device of vehicle

摘要

A failure determination device capable of performing failure determination for a shutter device of a vehicle with accuracy in a short time period. In an engine room of a vehicle, a condenser for a refrigeration cycle for an aircon is provided and at a front grille of the vehicle, a grille shutter device is provided for introducing ambient air for cooling the condenser into the engine room by opening a grille shutter. According to the failure determination device of the shutter device, a pressure of the refrigerant discharged from the condenser is detected as a refrigerant pressure. A failure of the grille shutter device is determined based on the refrigerant pressure, which changes at a large rate according to the opening/closing of the grille shutter, enabling failure determination with accuracy in a short time period.

主权项

1. A failure determination device for determining a failure of a shutter device of a vehicle that has an engine room provided with a condenser of a refrigeration cycle for an aircon, and has a front opening provided with a shutter which can be opened and closed, the shutter device being provided for introducing ambient air into the engine room for cooling the condenser by opening the shutter, comprising:
refrigerant pressure detection means for detecting a pressure of a refrigerant discharged from the condenser as a refrigerant pressure; and failure determination means for determining a failure of the shutter device based on the detected refrigerant pressure; opening/closing control means for controlling opening/closing of the shutter by outputting an opening command or a closing command to the shutter device as an opening/closing command, wherein said failure determination means determines that a failure has occurred in the shutter device when a difference between a closing command-time refrigerant pressure which is a refrigerant pressure detected when the closing command has output from said opening/closing control means and an opening command-time refrigerant pressure which is a refrigerant pressure detected when the opening command has output, during operation of the aircon, is not larger than a predetermined value.