COOLING APPARATUS

• US 20190126755A1
• Filed: 09/06/2018
• Published: 05/02/2019
• Est. Priority Date: 10/26/2017
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: YOSHIDA, Shiro
• Granted Patent: US 10,449,860 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 11/02 with liquid cooling
• CPC Class Codes: B60K 11/04 Arrangement or mounting of radiators, radiator shutters, or radiator blinds B60K11/085 takes precedence
• CPC Class Codes: B60K 2001/003 with means for cooling the electrical propulsion units
• CPC Class Codes: B60L 2240/445 Temperature
• CPC Class Codes: B60L 3/0023 Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
• CPC Class Codes: B60W 10/30 including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
• CPC Class Codes: B60W 20/50 Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: F01P 2025/66 Vehicle speed
• CPC Class Codes: F01P 5/14 Safety means against, or active at, failure of coolant-pumps drives, e.g. shutting engine down; Means for indicating functioning of coolant pumps
• CPC Class Codes: F01P 7/00 Controlling of coolant flow

Abstract

A cooling apparatus may be configured to cool a device mounted in a vehicle. The cooling apparatus may include: a pump configured to circulate a refrigerant between the device and a radiator, and a controller configured to provide an output command value to the pump, and to monitor occurrence of abnormality of the pump. The controller may be configured capable of executing: vehicle-speed-based control including shifting the output command value when a vehicle speed falls below a predetermined vehicle speed threshold value; and monitoring control including: measuring an abnormality duration time during which a rotational speed of the pump is deviating from a predetermined allowable range; and outputting a notification signal notifying the abnormality of the pump when the measured abnormality duration time exceeds a predetermined time threshold value. While the controller is measuring the abnormality duration time in the monitoring control, the controller may inhibit the vehicle-speed-based control.

Claims

1. A cooling apparatus configured to cool a device mounted in a vehicle, the cooling apparatus comprising:

a pump configured to circulate a refrigerant between the device and a radiator, and

a controller configured to provide an output command value to the pump, and to monitor occurrence of abnormality of the pump,

wherein

the controller is configured capable of executing;

vehicle-speed-based control including shifting the output command value when a vehicle speed falls below a predetermined vehicle speed threshold value; and

monitoring control including;

measuring an abnormality duration time during which a rotational speed of the pump is deviating from a predetermined allowable range; and

outputting a notification signal notifying the abnormality of the pump when the measured abnormality duration time exceeds a predetermined time threshold value, and

while the controller is measuring the abnormality duration time in the monitoring control, the controller inhibits the vehicle-speed-based control.

2. The cooling apparatus according to claim 1, wherein

the controller is configured to temporarily stop the monitoring control during a predetermined period of time since the output command value has been shifted by a predetermined value in the vehicle-speed-based control.