HVAC control system for a multizoned vehicle

• US 6,460,356 B1
• Filed: 10/02/2001
• Issued: 10/08/2002
• Est. Priority Date: 10/02/2001
• Status: Expired due to Term

• Current Assignee: PACCAR Incorporated
• Original Assignee: PACCAR Incorporated
• Inventors: Baker, Steven L., Bertalan, Richard Paul, Tao, Michikazu Jody
• Primary Examiner(s): Esquivel, Denise L.
• Assistant Examiner(s): Norman, Marc
• Application Number:
  US09/970,031
• Time in Patent Office: 371 Days
• Field of Search: 621/75, 621/78, 622/44, 236/51, 236/1.B, 165/202, 165/203, 165/204, 165/205
• US Class Current: 62/175
• CPC Class Codes: B60H 1/00378 for tractor or load vehicle cabins
• CPC Class Codes: B60H 1/00642 Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices B60H1/3201 - B60H1/3208, B60H1/3225 take precedence
• CPC Class Codes: B60H 1/0073 Control systems or circuits characterised by particular algorithms or computational models, e.g. fuzzy logic or dynamic models
• CPC Class Codes: B60H 1/00985 Control systems or circuits characterised by display or indicating devices, e.g. voice simulators characterised by the input of sound using a voice synthesizer B60H1/00757; B60H1/00978 takes precedence
• CPC Class Codes: F24F 11/54 using one central controller connected to several sub-controllers

Abstract

An HVAC control system for a vehicle with multiple environmental zones includes a datalink between the control elements of the HVAC systems that regulate the climate in the multiple environmental zones. Control elements for the HVAC systems include an electronic control unit and a control head. A user of the HVAC control system may assign master status to the control head of the zone in which the user is located, and from that control head, control the environmental settings for HVAC systems servicing other zones in the vehicle. A data communication bus implemented in the vehicle may be used as the datalink.

Claims

1. A control system for controlling HVAC systems in a vehicle having multiple zones, comprising:

(a) a first climate control system associated with a first zone in the vehicle, the first climate control system having a control head for controlling a first HVAC system that regulates the climate in the first zone;

(b) a second climate control system associated with a second zone in the vehicle, the second climate control system having a control head for controlling a second HVAC system that regulates the climate in the second zone; and

(c) a datalink providing communication between the first climate control system and the second climate control system, said datalink enabling the control head of the first zone to control the HVAC system of the second zone.

2. The control system of claim 1, wherein the datalink further enables the control head of the second zone to control the HVAC system of the first zone.

3. The control system of claim 1, wherein the first and second climate control systems each further include an electronic control unit in communication with the first and second control heads, respectively, for controlling the first and second HVAC systems, wherein the datalink enables communication between the electronic control units of the first and second climate control systems.

4. The control system of claim 1, wherein the datalink enables communication between the control heads of the first and second zones.

5. The control system of claim 1, wherein the control heads of the first and second zones are configured to assume a master or slave status relative to the zones of the vehicle.

6. The control system of claim 5, wherein the control head of the first zone is configured to assume master status relative to the second zone, causing the control head of the second zone to assume slave status.

7. The control system of claim 5, wherein the control head of the second zone is configured to assume master status relative to the first zone, causing the control head of the first zone to assume slave status.

8. The control system of claim 1, wherein the control heads of the first and second zones are each comprised of a control panel that is operable by a user of the vehicle to control the climate of the first and second zones.

9. The control system of claim 8, wherein the control panel enables automatic climate control of the zone over which it has control.

10. The control system of claim 8, wherein the control panel enables manual climate control of the zone over which it has control.

11. The control system of claim 1, wherein the datalink is comprised of a wireless data communication connection.

12. The control system of claim 1, wherein the datalink enables the control head of the first zone to simultaneously control the HVAC systems of two or more zones in the vehicle.

13. A climate control system for a vehicle having multiple zones, comprising:

(a) for each zone in the vehicle, an HVAC system and associated control head that regulates the climate in the zone, the control head for each zone capable of assuming a master or slave status, wherein master status for a control head in a zone permits the control head to control the HVAC system of another zone; and

(b) a datalink providing communication between the zones, the datalink enabling the control head for a first zone to assume master status over a second zone and control the HVAC system of the second zone.

14. The climate control system of claim 13, wherein the datalink further enables the control head for the second zone to assume master status over the first zone and control the HVAC system of the first zone.

15. The climate control system of claim 13, wherein the control head for a zone is comprised of a control panel capable of providing automatic climate control for the zone.

16. The climate control system of claim 13, wherein the control head for a zone is comprised of a control panel that provides manual control of the climate of the zone.

17. The climate control system of claim 13, wherein the HVAC systems for two or more zones share the same power plant in the vehicle.

18. The climate control system of claim 13, wherein the HVAC systems for two or more zones are separately powered.

19. The climate control system of claim 13, wherein the datalink is comprised of a wireless data communication connection.

20. The climate control system of claim 13, wherein the HVAC system for each zone further has a corresponding electronic control unit, and wherein the control head for each zone is configured to control the operation of an HVAC system for a zone by communicating with the zone'"'"'s corresponding electronic control unit.

21. The climate control system of claim 20, wherein the datalink enables communication between the electronic control units of the zones.

22. The climate control system of claim 13, wherein the datalink enables direct communication between the control heads of the zones.

23. A method of controlling HVAC systems in a vehicle having multiple zones, wherein each zone in the vehicle has an HVAC system that regulates the climate in the zone, the method comprising:

(a) providing a control head for each HVAC system in the vehicle, each control head having the capacity to assume a master or slave status;

(b) providing a datalink between the zones, the datalink enabling the zones to coordinate control of the HVAC systems according to the master or slave status assumed by the control heads;

(c) directing the control head for a first zone to assume master status relative to a second zone and control the HVAC system of the second zone via the datalink; and

(d) directing the control head for the second zone to assume slave status and relinquish control of the HVAC system of the second zone to the control head for the first zone.

24. The method of claim 23, further comprising directing the control head for the first zone to assume master status relative to two or more zones and control the HVAC systems in the two or more zones simultaneously.

25. The method of claim 23, wherein providing a datalink between the zones includes connecting the control heads for the zones to a data communication bus implemented in the vehicle.

26. The method of claim 23, further comprising providing an electronic control unit for each HVAC system in the vehicle, wherein the electronic control unit for a zone controls the operation of the HVAC system for the zone, and wherein providing a datalink between the zones includes connecting the electronic control units for the zones to a data communication bus implemented in the vehicle.

27. The method of claim 23, wherein directing the control head for the first zone to assume master status automatically causes the control head for the second zone to assume slave status.