Intelligent vehicle air conditioning control system

• US 6,971,446 B2
• Filed: 02/21/2001
• Issued: 12/06/2005
• Est. Priority Date: 02/21/2001
• Status: Expired due to Fees

• Current Assignee: International Truck Intellectual Property Co. LLC (Volkswagen AG)
• Original Assignee: International Truck Intellectual Property Co. LLC (Volkswagen AG)
• Inventors: Price, Ralph D., Laukhuf, Rodney A.
• Primary Examiner(s): Ford, John K.
• Application Number:
  US09/789,896
• Publication Number:
  US 20030172156A1
• Time in Patent Office: 1,749 Days
• Field of Search: 165/202, 165/203, 165/42, 165/43, 165/237, 236/91.C, 236/49.3
• US Class Current: 165/203
• CPC Class Codes: B60H 1/00742 by detection of the vehicle occupants' presence; by detection of conditions relating to the body of occupants, e.g. using radiant heat detectors
• CPC Class Codes: B60H 1/00835 Damper doors, e.g. position control construction or arrangement of damper doors B60H1/00664; B60H1/00864 takes precedence
• CPC Class Codes: B60H 1/00871 Air directing means, e.g. blades in an air outlet construction of nozzles or air diffusers B60H1/34
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/79 for controlling the direction of the supplied air
• CPC Class Codes: F24F 13/08 Air-flow control members, e.g. louvres, grilles, flaps or guide plates F24F7/013, F24F13/06 take precedence
• CPC Class Codes: F24F 2120/10 Occupancy

Abstract

An air conditioning control system for controlling the air conditioning system of a vehicle. The air conditioning control system is capable of determining the occupancy status of various locations in the vehicle interior. The air conditioning control system alters the flow rate of conditioned air to various portions of the vehicle interior based at least partially upon the occupancy of those areas of the vehicle interior. The air conditioning control system delivers increased amounts of conditioned air to the occupied portions of the vehicle interior when the conditioned air is of a comfortable temperature. The air conditioning control system delivers decreased amounts of conditioned air to the occupied portions of the vehicle interior when the conditioned air is most likely to be of an uncomfortable temperature.

Claims

1. A vehicle, comprising:

(a) a chassis;

(b) a suspension attached to said chassis for supporting said chassis;

(c) a power train engaged to said chassis for causing movement of said vehicle;

(d) an occupant cabin engaged to said chassis for providing protection from the elements

(e) for occupants of said vehicle and having a plurality of occupancy positions;

(f) an air conditioning system mounted to said vehicle;

(g) a control module;

(h) a network of ducts, comprising a portion of said air conditioning system, which has an inlet and a plurality of outlets adjacent to an interior of said occupant cabin;

(i) a blower, comprising a portion of said air conditioning system, for creating a flow of air through said network of ducts;

(i) one or both of a heating element and a cooling element, which comprise a portion of said air conditioning system, which are disposed within said network of ducts;

(k) one or more occupancy sensors mounted within said occupant cabin of said vehicle;

(l) one or more temperature sensors mounted within an interior of said network of ducts of said air conditioning system of said vehicle;

(m) one or more shutters, positioned within the path of flow of conditioned air through said network of ducts, for altering flow rates of conditioned air through various branches of said network of ducts and thus delivering a higher flow rate of conditioned air to various portions of said occupant cabin;

(n) one or more shutter actuators attached to the one or more shutters of said air conditioning system of said vehicle;

(o) wherein said one or more occupancy sensors are connected to said control module and said control module receives signals from said one or more occupancy sensors which correlate to the state of occupancy of said occupancy positions of said vehicle'"'"'s occupant cabin;

(p) wherein said one or more temperature sensors are connected to said control module and said control module receives signals from said one or more temperature sensors which correlate to a temperature of conditioned air within said network of ducts of said air conditioning system of said vehicle;

(q) wherein each of said one or more shutter actuators are operable to manipulate the position of each respective shutter of said air conditioning system to which said shutter actuator is attached;

(r) wherein each of said one or more shutter actuators are connected directly or indirectly to said control module and each of said shutter actuators are controlled by said control module to individually manipulate a position of a respective shutter to which said shutter actuator is attached;

(s) an algorithm encoded computer program which is embodied in a computer readable medium which causes said control module to control said one or more shutter actuators, and thus flow rates of conditioned air to various portions of said occupant cabin, in a manner dependent at least partially upon said signals which said control module receives from said one or more occupancy sensors and said one or more temperature sensors;

(t) said computer program more specifically causes said control module to perform the steps of;

ascertaining based upon signals provided by said one or more occupancy sensors whether or not each respective one of said occupancy positions of said vehicle is occupied;

ascertaining based upon signal provided by said one or more temperature sensors the temperature of conditioned air with said network of ducts of said air conditioning system;

controlling each respective one of said one or more shutter actuators of said air conditioning system to provide higher flow rates of conditioned air to some portions of said occupant cabin than to other portions of said occupant cabin in a manner based at least partially upon signals received from said one or more temperature sensors and said one or more occupancy sensors;

determining if said air conditioning system is in a heating or cooling mode;

if said control module determines that said air conditioning system is in a heating mode and that conditioned air within said network of ducts is of a temperature lower than a first temperature TEMPH said control module controlling said one or more shutter actuators in a manner such that a higher flow rate of conditioned air is delivered to unoccupied ones of said occupancy positions than to occupied ones of said occupancy positions;

if said control module determines that said air conditioning system is in a heating mode and that conditioned air within said network of ducts is of a temperature higher than a first temperature TEMPH said control module controlling said one or more shutter actuators in a manner such that a higher flow rate of conditioned air is delivered to occupied ones of said occupancy positions than to unoccupied ones of said occupancy positions;

if said control module determines that said air conditioning system is in a cooling mode and that conditioned air within said network of ducts is of a temperature higher than a second temperature TEMPC said control module controlling said one or more shutter actuators in a mariner such that a higher flow rate of conditioned air is delivered to unoccupied ones of said occupancy positions than to occupied ones of said occupancy positions; and

if said control module determines that said air conditioning system is in a cooling mode and that conditioned air within said network of ducts is of a temperature lower than a second temperature TEMPC said control module controlling said one or more shutter actuators in a manner such that a higher flow rate of conditioned air is delivered to occupied ones of said occupancy positions than to unoccupied ones of said occupancy positions.

2. The vehicle of claim 1, wherein:

said one or more occupancy sensors are infrared sensors, mounted in said occupant cabin, which provide signals to said control module which correlate to spot temperatures at each of said occupancy positions of said occupant cabin.

3. The vehicle of claim 2, wherein:

said computer program more specifically causes said control module to perform the steps of;

if said signals relayed to said control module from said infrared sensors correlate to a spot temperature for a particular occupancy position which is similar in magnitude to a normal body temperature of a living being said control module operates as if said particular occupancy position is occupied; and

if said signals relayed to said control module from said infrared sensors correlate to a spot temperature for a particular occupancy position which is outside a range equivalent to a normal body temperature of a living being said control module operates as if said particular occupancy position is unoccupied.

4. The vehicle of claim 3, wherein:

for each respective occupancy positions one of said at least one temperature sensors is positioned near an end of a branch of said network of ducts which exhausts in an area near said respective occupancy position, such that temperatures of conditioned air delivered to each respective occupancy position can be known and control of said one or more shutters can be more appropriately performed.

5. The vehicle of claim 4, wherein:

said one or more occupancy sensors are comprised of one infrared occupancy sensor for each respective occupancy position of said occupant cabin; and

each of said infrared occupancy sensors is located near each respective occupancy position of said occupant cabin.