Cooling fan device
US11833883B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2023 |
| Grant date | Dec 5, 2023 |
| Priority date | — |
| Expiry date | Jun 20, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P7/088
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A cooling fan device includes an electronic control unit that controls an engagement rate of a fan clutch. The electronic control unit executes a first calculation process that calculates an air conditioner requested engagement rate, a second calculation process that calculates, as a first guard value, a value of an engagement rate at which a fan rotation speed increases at a specified speed and an upper limit guarding process that sets a value of the air conditioner requested engagement rate to the first guard value when a calculated value of the air conditioner requested engagement rate in the first calculation process exceeds the first guard value. The electronic control unit further controls the engagement rate of the fan clutch based on a value of the air conditioner requested engagement rate after execution of the upper limit guarding process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.