Denso Corporation

Nippondenso Co., Ltd.

Katsuhiko Samukawa

Yuji Honda

Takayoshi Kawai

Yuji Ito

Yuichi Kajino

Yoshinori Ichishi

Hikaru Sugi

Tomotsugu Terada

Toshifumi Kamiya

Tomohisa Yoshimi

Masafumi Kawashima

Akira Yamaguchi

Kenichi Kato

Yuuji Honda

Nobuharu Kakehashi

Koichi Ban

Tatsumi Kumada

Akira Ohga

Akira Oga

Masahiko Tateishi

Yuuichi Kajino

Tomoyuki Kako

Yoshiyuki Ogawa

Yutaka Hirose

Masashi Ino

In an air-conditioner control unit, when pollen mode control is set by a vehicle occupant to perform the pollen mode control that can provide a defogging effect while maintaining the pollen removal effect, the opening of an air inlet door is forcibly set to an inside-air introduction mode (S) when the following two conditions hold: ambient temperature Tam is higher than a threshold (5 to 6&#xb0; C.) set in a low-temperature region (S), and a compressor system is able to operate normally without causing an abnormal pressure (S). If even one of these conditions does not hold, the opening of the air inlet door is not forcibly set to the inside-air introduction mode, and the air inlet door is operated as in normal control. In this way, in the pollen mode control, since the pollen removal effect in the inside-air introduction mode is enabled only when the ambient air is relatively high, the occurrence of windshield fogging can be suppressed.

Automotive air-conditioning system

In an automotive air-conditioning system, when pollen mode control is effected by a vehicle occupant, air outlet mode is forcibly set to a face mode. Further, the air flow amount determined from the air flow amount Vm used in the usual auto mode and the air flow amount f(Tw) used during warm-up control or the air flow amount determined by the air flow amount correction value f(Tam) having a relatively small upper limit value when ambient temperature is higher than a predetermined temperature (15&#xb0; C.), whichever is larger, is taken as the set value for the air flow amount in the pollen mode control. With this arrangement, when coolant temperature and ambient temperature are low, a relatively small amount of air can be blown to the upper part of the occupant's body, and thus, while maintaining the pollen removal effect, occupant discomfort can be reduced by preventing a fast flow of air from being blown toward the occupant's face, etc.

When a switching signal to switch the mode to the defroster mode is generated and the target air volume is smaller than a predetermined air volume &#x3b1;, the target air volume is automatically increased to the predetermined air volume &#x3b1;. In doing so, an increase starting point of time of increasing the target air volume is determined according to the blowout mode immediately before a switch signal to switch the mode to the defroster mode is generated.

Air-conditioner for vehicle use

An air conditioner for automotive vehicle use intended to prevent a defrosting operation in an instantaneous foot-defroster mode. The DEF mode in which air mainly from a DEF opening is blown toward the windshield is set by an exclusive front DEF switch. The F/D mode for blowing a substantially equal amount of air to the windshield and the feet of the occupants from the DEF opening and the FOOT opening, respectively, together with the other blow modes (FACE, B/L, FOOT), are sequentially switched for each operation of the blow mode switch in a predetermined sequence. In the case where the F/D mode is selected, the air condition control operation is not performed nor is the blow mode displayed in F/D mode before the lapse of a predetermined length of time (about 1 second). In the case where the blow mode other than F/D mode is desired, therefore, the unrequired control operation in F/D mode is not performed and the instantaneous change is not displayed even though the F/D mode is unavoidably passed-through.

Air conditioner for vehicle use

In an air conditioner for a vehicle having first and second air conditioning zones positioned at right and left sides of a front seat in a vehicle compartment and third and fourth air conditioning zones positioned at right and left sides of a rear seat in the vehicle compartment, the air conditioner includes calculating means for calculating each of target blowing-out temperatures of air blown out to the first to fourth air conditioning zones in accordance with environmental conditions and desirable temperatures of the first to fourth air conditioning zones. In the air conditioner, the calculating means corrects an influence from the other air conditioning zones by using a selected desirable temperature in the desirable temperatures of the first to fourth air conditioning zones, while calculating the individual target blowing-out temperatures of the first to fourth air conditioning zones.

Air conditioner for vehicle

A controlled variable-calculating apparatus and method that can easily calculate a controlled variable from one or more input variables and that can appropriately learn control characteristics for the calculation of the controlled variable. The control characteristics are represented as a surface embedded in an (n&plus;1)-dimensional space, and are used to control one controlled variable from n variables. The control characteristics are approximated by an assemblage of flat planes corresponding to subspaces obtained by dividing an n-dimensional input space. For example, a two-dimensional input space defined by the interior temperature and the amount of sunlight is divided into 15 subspaces. Flat planes are made to correspond to the subspaces, respectively. If the interior temperature and the amount of sunlight are entered, a decision is made as to which subspace the environmental conditions belong. The airflow is then calculated using an equation for any one of the flat planes . If the airflow is needs to be modified, the equation for the flat plane corresponding to the corresponding subspace is updated.

Apparatus and method for calculating an air-conditioning system controlled variable

Temperatures in a Dr side air-conditioning zone and a Pa side air-conditioning zone are controlled highly independently of each other without temperature interference between each zone. A room internal air temperature sensor and a room external air temperature sensor are provided. Dr side and Pa side temperature setters separately set room setpoint temperatures (Tset(Dr), Tset(Pa)) in each zone. First and second target blow-out temperature calculating portions, which include neural network, input the room setpoint temperatures and the temperature data. Then it calculates Dr side and Pa side target blow-out temperatures (TAO(Dr), TAO(Pa)) relative to each air-conditioning zones by using a neural network. Air-mixing doors separately adjusts the temperatures of conditioned air blown out from Dr side air passage and Pa side air passage to be the first and second target blow-out temperatures. Here, the neural network has the learning function, which adjusts its output to be desired data (teacher signal). Therefore, the output at a specific input condition can be adjusted without temperature interference between each zone.

Air-conditioning device

A vehicle air conditioner includes an air conditioning unit where temperature adjustments of both right and left-seat side air-conditioning zones are independently performed. In the vehicle air conditioner, a swing range of right-seat side center louvers provided in a right center face air outlet is restricted from a front right-seat direction to a rear left-seat direction, and a swing range of left-seat side center louvers provided in a left center face air outlet is restricted from a front left-seat direction to a rear right-seat direction. Thus, right-left independent temperature control can be accurately performed in the vehicle air conditioner.

Vehicle air conditioner with louver operation control

In an air-conditioning system having two air-conditioning passages serving two different air-conditioning zones but having a cooling degree detector provided in only one of the passages to reduce cost, with the degree to which air is cooled in the other passage being estimated based on a cooling degree detected by the detector and the difference between flows of air passing through the passages or an intake temperature of air entering the passages. On the other hand, when an evaporator is possible to be frosted in one of the passages, air flow amount in the one of the passages is corrected to be increased. Therefore, it can prevent a windshield from being fogged while preventing the evaporator from being frosted.

Vehicle-air-conditioning system with cooling degree estimator for left/right temperature control

A vehicle air-conditioning system for achieving a comfortable blowout state of conditioned air at all times both with respect to air-conditioning load factors which change frequently, like solar radiation strength, and with respect to air-conditioning load factors which change slowly, like passenger compartment temperature, by automatic control of grill louver swing control times corresponding to different air-conditioning loads. For example, when it can be estimated that solar radiation is incident on a driver side or passenger side front or rear seat occupant, oscillating driver side and passenger side center louvers are paused at a swing end of the occupant estimated to be exposed to solar radiation for a time that corresponds to the amount of cooling load. Therefore, it is possible to direct conditioned air at an occupant exposed to sun and thus improve the comfort of occupants upon whom sun is incident.

Vehicle air-conditioning system with automatic louver oscillation control

A vehicle air conditioning apparatus in which the larger the air conditioning cooling load in a vehicle compartment, for example, the larger the solar radiation amount, the lower the set temperature or the larger the temperature deviation between set temperature and inner air temperature, the narrower the swing ranges of swing louvers of respective center and side FACE blow outlets are set. Regardless of the swing range of the swing louvers, swing cycles of the swing louvers are set constant, and the narrower the swing ranges of the swing louvers, the slower the swing speeds of the swing louvers are set. Therefore, annoying feeling is reduced, and comfortable feeling for passengers is significantly improved.

Vehicle air conditioning apparatus

An automotive air conditioning system designed to switch a ventilation mode to an air recirculation mode automatically when the contamination of outside air is greater than a given level. The system includes a mode selection prohibiting circuit that prohibits the switching between the air recirculation mode and the ventilation mode and operates the air conditioning system in the ventilation mode when the vehicle is traveling at high speeds or when the outside temperature is relatively low. This allows fresh air having a relatively lower humidity to be drawn into the passenger compartment, thereby avoiding fogging of inner surfaces of windows of the vehicle.

Air conditioning system for automotive vehicles

An air conditioning system for a vehicle is composed of a control unit which controls an air switching door, an element for detecting a clean-air level of the outside air and a vehicle speed sensor. The control unit controls the air-switching door to set to the outside-air mode when the clean-air level is higher than a reference level and to the inside-air mode when the clean-air level is not higher than the reference level. The control unit holds the inside-air mode until the vehicle speed becomes higher than a predetermined speed irrespective of the clean-air level.

Air conditioning system for vehicle

According to the present invention, when target temperatures of air blown out toward a first and a second air conditioning zones are equal, a target opening degree of a second air mixing door is set to an actual opening degree of a first air mixing door. In this way, the second air mixing door is located at a deviated position in the range of -4-+4 (%) from the actual position of the first air mixing door. Thus, a relative positional deviation between the respective air mixing doors becomes 4 (%) even at maximum, which is approximately half as compared with a conventional value. Accordingly, temperatures of air blown out toward the first and second air conditioning zones can be substantially the same, and a comfortable temperature control independently for the right and left seats can be realized.

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Okazaki, Japan

Katsuhiko Samukawa