Variable pitch fan control system
US-11668228-B2 · Jun 6, 2023 · US
System for operating a cooling device of a utility vehicle
US12503971B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12503971-B2 |
| Application number | US-202318303406-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 19, 2023 |
| Priority date | Apr 21, 2022 |
| Publication date | Dec 23, 2025 |
| Grant date | Dec 23, 2025 |
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- Title
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- Abstract
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Abstract
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A system for operating a cooling device of a utility vehicle includes an axial fan, a temperature sensor, and a control unit. The axial fan can be rotated by a fan drive and is used to generate a cooling air stream for impingement on a vehicle assembly that is to be cooled. The axial fan has a plurality of fan blades that can be pivoted in terms of an angle of incidence by deflection of an actuator. The temperature sensor determines an actual value of a temperature variable that reflects a present operating temperature of the vehicle assembly. The control unit compares the actual value of the temperature variable with a specified setpoint value to output a target value of a control variable provided for the operation of the actuator. The control variable is one of a hydraulic and a pneumatic operation pressure for deflecting the actuator.
First claim
Opening claim text (preview).
What is claimed is: 1 . A system for operating a cooling device of a utility vehicle, comprising: an axial fan which can be set in rotation by a fan drive and which is used to generate a cooling air stream for impingement on a vehicle assembly that is to be cooled, the axial fan having a plurality of fan blades that can be pivoted in terms of an angle of incidence by deflection of an actuator; a temperature sensor for determining an actual value of a temperature variable that reflects a present operating temperature of the vehicle assembly; a control unit that compares the actual value of the temperature variable with a specified setpoint value to output a target value of a control variable provided for the operation of the actuator, wherein the control variable is one of a hydraulic and a pneumatic operation pressure for deflecting the actuator; and a pressure control valve configured to control the pressure operation of the actuator, wherein the control unit is configured to compare the output target value of the control variable with a sensor-detected actual value to generate an electrical operation signal for activating the pressure control valve. 2 . The system of claim 1 , wherein the pressure control valve is configured as a 3/2 directional solenoid valve for operating the actuator comprising a single-acting positioning cylinder. 3 . The system of claim 1 , wherein the vehicle assembly that is to be cooled by the axial fan is a constituent part of an operating system of the utility vehicle. 4 . The system of claim 1 , wherein the pressure control valve is an electrically controllable pressure control valve.
Assignees
Inventors
Classifications
Temperature · CPC title
with air cooling · CPC title
The ventilator being of the axial type · CPC title
Pressure sensors · CPC title
Temperature sensors · CPC title
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- What does patent US12503971B2 cover?
- A system for operating a cooling device of a utility vehicle includes an axial fan, a temperature sensor, and a control unit. The axial fan can be rotated by a fan drive and is used to generate a cooling air stream for impingement on a vehicle assembly that is to be cooled. The axial fan has a plurality of fan blades that can be pivoted in terms of an angle of incidence by deflection of an actu…
- Who is the assignee on this patent?
- Deere & Co
- What technology area does this patent fall under?
- Primary CPC classification F01P5/04. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 23 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).