In a vehicle air-conditioning system, an evaporator (9) is disposed in an air-conditioning case (10) to form a bypass passage (16) through which air bypasses the evaporator, and an opening degree of the bypass passage is adjusted by a bypass door (17). When a vehicle engine (4) operates, the system performs a cold-storing mode where cold quantity stored in condensed water on the evaporator is increased. On the other hand, when operation of the vehicle engine is stopped, the system performs a cold-releasing mode where air passing through the evaporator is cooled by cold released from frozen condensed water. During the cold-storing mode and the cold-releasing mode, temperature of air blown into a passenger compartment can be adjusted by adjusting the opening degree of the bypass passage. Thus, in the vehicle air-conditioning system, cold-storing quantity in the evaporator can be improved while power-saving effect of the vehicle engine is improved.

Vehicle air-conditioning system

The present invention can speedily and accurately estimate an SOC of a secondary battery immediately after a charge/discharge operation resumes. A determination unit determines whether a dormant period is longer than a predetermined time in response to an initiation of power supply from a secondary battery to a motor generator. The dormant period is equivalent to the duration from a previous stop of power supply to a present initiation of power supply. If the dormant period is longer than the predetermined time, a state-of-charge estimating unit sets an initial SOC based on a peak battery voltage drop ΔVs and a peak discharge current Is, wherein the peak battery voltage drop ΔVs represents a difference between a battery voltage Vo measured before initiating power supply and a lowest battery voltage Vs measured after initiating power supply and the peak discharge current Is represents a maximum current value measured after initiating power supply. The state-of-charge estimating unit estimates a state of charge of the secondary battery 30 based on the initial SOC as a value effective immediately after initiating power supply.

Battery control apparatus, electric vehicle, and computer-readable medium storing a program that causes a computer to execute processing for estimating a state of charge of a secondary battery

A method and system for controlling a heating, ventilation and air-conditioning (HVAC) system of a vehicle to prevent fogging of a windshield of the automotive vehicle is provided. The method and system include determination of whether the vehicle has been recently turned "on" and preventing the HVAC system from directing air flow toward the windshield for a first predetermined time period after it has been determined that the vehicle has recently been turned "on".

System and method for prevention of windshield fogging in a motor vehicle

A method for controlling a heating, ventilation and air-conditioning (HVAC) system having an air vent associated with a window for blowing an air flow of controlled temperature thereon; the HVAC system having a refrigeration unit with a compressor and an evaporator, and blowing means for forcing air over the evaporator to the air vent. The method includes a first step (a) of activating the compressor while deactivating the blowing means during a first period for condensing moisture of the air contained in the HVAC system. The method includes a further step (b) comprising, at the expiry of the first period, activating the blowing means and keeping the compressor active during a second period for sufficiently reducing the dew-point temperature of air blown by the HVAC system, and deactivating the compressor at the expiry of the second period.

Method for controlling an HVAC system

The present invention balances power consumption reduction and a cooling in a vehicle air-conditioning system having a compressor (1) selectively driven by a vehicle engine (20) or a motor (21) while the compressor (1) is driven by the motor (21). At least one of a capacity of a blower (7) and a capacity of a compressor (1) arranged in a refrigeration cycle R while the compressor (1) being driven by a motor (21) is reduced in comparison to the capacity of the blower (7) and the capacity of the compressor (1) while the compressor (1) being driven by a vehicle engine (20). Furthermore, while a cooling heat load of an evaporator (5) is greater than a predetermined value, the capacity of the compressor (1) is first reduced prior to reducing the capacity of the blower (7).

Vehicel air-conditioning system

System and method for air-conditioning of vehicles preventing window inside fogging. An air-conditioning system for a motor vehicle having a compartment (33) with a windscreen (32) heated by an air flow of controlled temperature, and which includes in the system an evaporator (7), a blower or fan (36) for drawing air over the evaporator (7) and ducting (11, 34) for air distribution. In order to prevent misting of the inside of the windscreen after the vehicle has been parked with the engine shut off the fan (36) is deactived and preferably also the fresh air intake being closed, for a time period after switching on the air-conditioning system.

System and method for air-conditioning of vehicles preventing window inside fogging

Klimaanlage fur ein Fahrzeug mit einem Raum (33), der zumindest ein Fenster (32) aufweist, das mittels einer Luftstromung einstellbarer Temperatur heizbar ist, wobei die Klimaanlage umfasst: ein Verteilersystem (11, 34, 35), das Luftstromung zu dem Fenster lenkt, einen Kompressor (2), und ein mit dem Kompressor in Verbindung stehendes Warmetauschersystem (7, 8), das einen Verdampfer (7) und ein Geblase (36) zum Fuhren von Luft uber den Verdampfer (7) aufweist, und eine Steuereinrichtung (40), die mit dem Kompressor (2) und dem Geblase (36) verbunden ist, wobei die Klimaanlage weiter einen mit der Steuereinrichtung (40) verbundenen Umgebungsluft-Temperatur-Sensor (15) zum Ermitteln der Umgebungstemperatur auserhalb des Fahrzeugs und einen mit der Steuereinrichtung (40) verbundenen Solar-Sensor (18) zum Ermitteln der Intensitat der Sonneneinstrahlung aufweist, wobei die Steuereinrichtung (40) zum Aktivieren des Kompressors (2) ausgebildet ist, einen Zeitgeber zum Ermitteln einer ersten Zeitspanne, in der das Fahrzeug auser Betrieb gewesen ist, und...

Bernt Frederiksson

Papers

System and method for air-conditioning of vehicles preventing window inside fogging

Vorrichtung und Verfahren zum Klimatisieren von Fahrzeugen unter Vermeidung eines innenseitigen Beschlagens von Fenstern