Airflow control system

• US 20060073780A1
• Filed: 09/29/2004
• Published: 04/06/2006
• Est. Priority Date: 09/29/2004
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: McEnaney, Ryan Patrick, Zimmermann, Daniel E., Brush, Jeffrey Alan, Motszko, Sean Ronald
• Granted Patent: US 7,189,158 B2
• Time in Patent Office: Days
• US Class Current: 454/74
• CPC Class Codes: B60H 1/00378 for tractor or load vehicle cabins
• CPC Class Codes: B60H 1/00692 Damper doors moved by translation, e.g. curtain doors
• CPC Class Codes: B60H 1/00857 characterised by the means connecting the initiating means, e.g. control lever, to the damper door

Abstract

A dual airflow control system for an environment having a first air zone and a second air zone. The system includes a first input device operable to generate a first input signal indicative of a desired airflow to the first zone and a second input device operable to generate a second input signal indicative of a desired airflow to the second zone. First and second flow regulators are configured to regulate airflow to the first and second zones, respectively, such that the first and second regulators selectively provide the airflow to each of the first and second zones based on the first and second input signals. A single actuator is associated with the first and second flow regulators. The actuator is operable to simultaneously actuate the first and second flow regulators based on an input from the first and second input devices to allow the desired airflows to the first and the second zones.

Claims

1. A dual airflow control system for an environment having a first air zone and a second air zone, comprising:

a first input device operable to generate a first input signal indicative of a desired airflow to the first zone;

a second input device operable to generate a second input signal indicative of a desired airflow to the second zone;

first and second flow regulators configured to regulate airflow to the first and second zones, respectively, such that the first and second regulators selectively provide airflow to each of the first and second zones based on the first and second input signals; and

a single actuator associated with the first and second flow regulators and operable to simultaneously actuate the first and second flow regulators based on an input from the first and second input devices to allow the desired airflows to the first and the second zones.

2. The airflow control system of claim 1, wherein the first and second flow regulators each include:

a first plate having first orifices formed therein, and

a second plate having second orifices formed therein, the second plate being configured to move relative to the first plate in a manner that the first and second orifices define passages configured to selectively open and close to regulate the airflow to the first and second zones.

3. The airflow control system of claim 2, wherein at least one orifice of one of the first and second orifices has a height that is at least twice as large as the height of at least one orifice of the other of the first and second orifices.

4. The airflow control system of claim 3, wherein at least one second orifice in the second plate is sized to be substantially the same size as at least one of the first orifices in the first plate.

5. The airflow control system of claim 2, wherein the second plate is common to both the first and second flow regulators.

7. The airflow control system of claim 1, including a single variable speed blower disposed to generate airflow to both the first and second flow regulators.

8. The airflow control system of claim 7, including a controller operable to receive the first and second input signals from the first and second input devices and generate

an actuator control signal based on the first and second input signals, the controller being operable to communicate the actuator control signal to the actuator to control the first and second flow regulators, and

a blower control signal based on the first and second input signals, the controller being operable to communicate the blower control signal to the blower to produce the first and the second desired airflows.

9. The airflow control system of claim 8, wherein the controller includes a look-up table stored therein, the controller being configured to generate the actuator and blower control signals based on the information in the look-up table.

10. A method of operating a dual airflow control system for an environment having a first air zone and a second air zone, comprising:

generating a first input signal indicative of a desired airflow to the first zone;

generating a second input signal indicative of a desired airflow to the second zone;

regulating airflow to the first and second zones with a first and a second flow regulator, respectively, in a manner that selectively provides the airflow based on the first and second input signals; and

simultaneously actuating the first and second flow regulators with a single actuator to allow the desired airflows to the first and the second zones based on the first and second input signals.

11. The method of claim 10, wherein regulating airflow includes moving a second plate relative to a first plate in a manner that passages defined by first orifices in the first plate and second orifices in the second plate selectively open and close.

12. The method of claim 10, including generating airflow to both the first and second flow regulators through a single variable speed blower.

13. The method of claim 12, including:

receiving the first and second input signals from the first and second input devices at a controller;

generating an actuator control signal based on the first and second input signals;

communicating the actuator control signal to the actuator to control the first and second flow regulators;

generating a blower control signal based on the first and second input signals; and

communicating the blower control signal to the blower to produce the first and the second desired airflows.

14. The method of claim 13, wherein generating the actuator control signal and generating the blower control signal each include considering information stored in a look-up table.

15. A dual airflow control system for a vehicle having a first air zone and a second air zone, comprising:

a first input device operable to generate a first input signal indicative of a desired airflow to the first zone;

a second input device operable to generate a second input signal indicative of a desired airflow to the second zone;

first and second flow regulators configured to regulate airflow to the first and second zones, respectively, such that the first and second regulators selectively provide the airflow to each zone based on the first and second input signals; and

a single blower configured to create an airflow for passage through both the first and second flow regulators based on the first and second input signals from the first and second input devices to provide the desired airflows to the first and second zones.

16. The airflow control system of claim 15, wherein the blower is an electrically powered blower.

17. The airflow control system of claim 15, including a single actuator associated with the first and second flow regulators and operable to simultaneously actuate the first and second flow regulators based on the first and second input signals from the first and second input devices to allow the desired airflows to the first and the second zones.

18. The airflow control system of claim 17, including a controller operable to receive the first and second input signals from the first and second input devices and generate

an actuator control signal based on the first and second input signals, the controller being operable to communicate the actuator control signal to the actuator to control the first and second flow regulators;

and

a blower control signal based on the first and second input signals, the controller being operable to communicate the blower control signal to the blower to produce the first and the second desired airflows.

19. The airflow control system of claim 18, wherein the controller includes a look-up table stored therein, the controller being configured to generate the actuator and blower control signals based on the information in the look-up table.

20. A method of controlling a dual airflow control system for a vehicle having a first air zone and a second air zone, comprising:

generating a first input signal indicative of a desired airflow to the first zone;

generating a second input signal indicative of a desired airflow to the second zone;

regulating airflow to the first and second zones with first and second regulators, respectively, in a manner that selectively allows the airflow to each zone to be the same or different based on the first and second input signals; and

creating an airflow for passage through both the first and second flow regulators with a single blower based on the first and second input signals from the first and second input devices.

21. The method of claim 20, including simultaneously actuating the first and second flow regulators with a single actuator to allow the desired airflows to the first and the second zones based on the first and second input signals.

22. The method of claim 20, including:

receiving the first and second input signals from the first and second input devices at a controller;

generating an actuator control signal based on the first and second input signals;

communicating the actuator control signal to the actuator to control the first and second flow regulators;

generating a blower control signal based on the first and second input signals; and

communicating the blower control signal to a blower to produce the first and the second desired airflows.

23. The method of claim 22, wherein generating the actuator control signal and generating the blower control signal each include considering information stored in a look-up table.

24. A vehicle, comprising:

an operator compartment having a first air zone and a second air zone; and

a dual airflow control system, including

a first input device operable to generate a first input signal indicative of a desired airflow to the first zone;

a second input device operable to generate a second input signal indicative of a desired airflow to the second zone;

first and second flow regulators for regulating airflow to the first and second zones, respectively;

a single actuator for simultaneously actuating the first and second flow regulators;

a single variable speed blower disposed to selectively generate airflow through the first and second flow regulators; and

a controller operable to receive the first and second signals from the first and second input devices and generate an actuator control signal and a blower control signal based on the first and second input signals, the controller being operable to communicate the actuator and blower control signals to the actuator and blower, respectively, to produce the first and the second desired airflows.

25. The vehicle of claim 24, wherein the first and second flow regulators each include:

a first plate having first orifices formed therein, and

a second plate having second orifices formed therein, the second plate being configured to move relative to the first plate in a manner that the first and second orifices define passages configured to selectively open and close to regulate the airflow to the first and second air zones.

26. The vehicle of claim 25, wherein at least one orifice of one of the first and second orifices has a height that is at least twice as large as the height of at least one orifice of the other of the first and second orifices.

27. The vehicle of claim 24, wherein the controller includes a look-up table stored therein, the controller being configured to generate the actuator and blower control signals based on the information in the look-up table.