IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0991670
(2009-03-26)
|
등록번호 |
US-8682526
(2014-03-25)
|
우선권정보 |
EP-08425320 (2008-05-09) |
국제출원번호 |
PCT/IB2009/005130
(2009-03-26)
|
§371/§102 date |
20110228
(20110228)
|
국제공개번호 |
WO2009/136241
(2009-11-12)
|
발명자
/ 주소 |
- Mola, Stefano
- Malvicino, Carloandrea
- Idone, Domenico
|
출원인 / 주소 |
- C.R.F. Societá Consortile per Azioni
|
대리인 / 주소 |
Schwegman Lundberg & Woessner, P.A.
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
6 |
초록
▼
Described herein is a automotive air-conditioning system configured to implement a sub-critical refrigerating cycle and comprising a condenser and a fan associated thereto, a compressor, an evaporator, an expansion valve of the non-electronically-controlled type, and an electronic control system con
Described herein is a automotive air-conditioning system configured to implement a sub-critical refrigerating cycle and comprising a condenser and a fan associated thereto, a compressor, an evaporator, an expansion valve of the non-electronically-controlled type, and an electronic control system configured to receive a signal indicative of the ambient temperature outside the vehicle and to generate a control signal for the fan of the condenser on the basis of the ambient temperature outside the vehicle.
대표청구항
▼
1. An automotive air-conditioning system configured to implement a sub-critical refrigerating cycle and comprising a condenser and a fan associated thereto, a compressor, an evaporator, an expansion valve, and an electronic control system; wherein the expansion valve is non-electronically controlled
1. An automotive air-conditioning system configured to implement a sub-critical refrigerating cycle and comprising a condenser and a fan associated thereto, a compressor, an evaporator, an expansion valve, and an electronic control system; wherein the expansion valve is non-electronically controlled, with the electronic control system configured to: receive a signal indicating an external ambient temperature (Text) outside a vehicle;receive a signal indicating a measured condensation pressure (Pmeas—fluid) of a coolant in the condenser;determine a target condensation pressure (Ptarget—fluid) of the coolant in the condenser based on the external ambient temperature (Text);generate a condenser fan control signal (Sc) based on the measured condensation pressure(Pmeans_fluid) and the target condensation pressure (Ptarget_fluid) of the coolant in the condenser;determine a pressure error (ep) indicative of a difference between the measured condensation pressure (Pmeas˜fluid) and the target condensation pressure (Ptarget_fluid) of the coolant in the condenser; andgenerate the condenser fan control signal (Sc) based on the pressure error (ep). 2. The automotive air-conditioning system according to claim 1, further configured to: purge the pressure error (ep) from a pressure disturbance (ΔPfluid); andgenerate the condenser fan control signal (Sc) based on the purged pressure error (epd) as to bring the measured condensation pressure (Pmeas—fluid) to being substantially equal to the target condensation pressure (Ptarget—fluid) of the coolant in the condenser. 3. The automotive air-conditioning system according to claim 2, wherein the pressure disturbance (ΔPfluid) is associated with a changed measured condensation pressure (Pmeas—fluid). 4. The automotive air-conditioning system according to claim 3, wherein the changed measured condensation pressure is associated with at least one of a vehicle speed and an ambient temperature inside the passenger compartment of the vehicle that is set by a user via appropriate setting elements of the air-conditioning system. 5. The automotive air-conditioning system according claim 1, wherein the target condensation pressure (Ptarget_fluid) has a first substantially constant value associated with external ambient temperatures (Text) lower than a given lower ambient temperature, a second substantially constant value, different from the first substantially constant value, associated with external ambient temperatures (Text) higher than a given upper ambient temperature, and values comprised between the first and second substantially constant values associated with external ambient temperatures (Text) between the lower and upper ambient temperatures. 6. The automotive air-conditioning system according to claim 5, wherein the second substantially constant value is higher than the first substantially constant value. 7. The automotive air-conditioning system according to claim 6, wherein the target condensation pressure (Ptarget—fluid) is configured to increase substantially linearly between the first and the second substantially constant values. 8. The automotive air-conditioning system according to claim 7, wherein in association with external ambient temperatures (Text) between the lower and upper ambient temperatures, the target condensation pressure (Ptarget—fluld) is determined based on the following formula: Ptarget—fluid=k1·(Text−k2)+k3 where Text is the external ambient temperature outside the vehicle and Ptarget—fluid is the target condensation pressure. 9. The automotive air-conditioning system according to claim 8, wherein k1=⅗, k2=15 and k3=8. 10. The automotive air-conditioning system according to claim 5, wherein the lower ambient temperature is approximately 15° C. and the upper ambient temperature is approximately 35° C. 11. The automotive air-conditioning system according to claim 5, wherein the first substantially constant value is approximately 8 bar and the second substantially constant value is approximately 20 bar. 12. The automotive air-conditioning system according to claim 1, comprising an electronic control unit programmed to generate the condenser fan control signal (Sc). 13. The automotive air-conditioning system according to claim 1, wherein the expansion valve is mechanical. 14. A vehicle comprising an automotive air-conditioning system, wherein the automotive air-conditioning system is configured to implement a sub-critical refrigerating cycle and comprises a condenser and a fan associated thereto, a compressor, an evaporator, an expansion valve, and an electronic control system, wherein the expansion valve is non-electronically controlled, and the electronic control system is configured to: receive a signal indicating an external ambient temperature (Text) outside the vehicle;receive a signal indicating a measured condensation pressure (Pmeas—fluid) of a coolant in the condenser;determine a target condensation pressure (Ptarget—fluid) of the coolant in the condenser based on the external ambient temperature (Text);generate a condenser fan control signal (Sc) based on the measured condensation pressure(Pmeans_fluid) and the target condensation pressure (Ptarget_fluid) of the coolant in the condenser;determine a pressure error (ep) indicative of a difference between the measured condensation pressure (Pmeas˜fluid) and the target condensation pressure (Ptarget_fluid) of the coolant in the condenser; andgenerate the condenser fan control signal (Sc) based on the pressure error (ep). 15. The vehicle according to claim 14, wherein the vehicle is a motor vehicle. 16. A non-transitory computer readable storage medium stored thereon a software product loadable into an electronic control unit of an electronic control system of a motor vehicle air-conditioning system, which upon execution thereof, causes the electronic control unit to: receive a signal indicating an external ambient temperature (Text) outside the vehicle;receive a signal indicating a measured condensation pressure (Pmeas—fluid) of a coolant in a condenser of the air-conditioning system;determine a target condensation pressure (Ptarget—fluid) of the coolant in the condenser based on the external ambient temperature (Text);generate a condenser fan control signal (Sc) based on the measured condensation pressure(Pmeans_fluid) and the target condensation pressure (Ptarget_fluid) of the coolant in the condenser;determine a pressure error (ep) indicative of a difference between the measured condensation pressure (Pmeas˜fluid) and the target condensation pressure (Ptarget_fluid) of the coolant in the condenser; andgenerate the condenser fan control signal (Sc) based on the pressure error (ep).
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