Diesel Kiki Co., Ltd.

Mazda Motor Corporation

Zexel Gmbh

Diesel Kiki Kabushiki Kaisha

Diesel Kiki K.k.

Zexek Corporation

Matsuda K. K.

Katsumi Iida

Yoshihiko Sakurai

Akihiko Takano

Shigetoshi Doi

Teruaki Yano

Hideo Yamaguchi

Yoshiaki Nagayama

Taketoshi Matsushita

Yoshiaki Anan

Choshichi Miyanaga

Akihiro Hagiwara

Osawa Takasi

Hirofumi Nagaoka

An automobile air-conditioner wherein a controlled variable used to determine the control mode of a component of the air-conditioner is corrected or restricted according to the amount of shifting of the head part setting temperature for driving the component of the air-conditioner based on the corrected or restricted controlled variable. With this arrangement, an occupant of the automobile senses an enhanced change of the air-conditioning operation when the head part setting temperature is changed.

Air-conditioner for automobiles

In a vehicular air conditioning system, an air-distribution ratio control range is determined in accordance with a set rotational speed of a blower and the air distribution ratio is controlled in accordance with a solar radiation direction within the control range, whereby more comfortable air conditioning can be realized. The system may be arranged in such a way that the correction amount of air discharge in the case where the direction of the solar radiation is not within the a prescribed range is less than that in the case where the direction is within the perscribed range, in order to prevent unnecessarily large amount of air discharge.

Air conditioning system for vehicles

In an air conditioner including a variable-capacity compressor, a control system performs a PI calculation based on a temperature deviation between the actual temperature of the air downstream of an evaporator and its target temperature, thereby determining a control amount for controlling the capacity of the compressor. It is judged whether or not the sum of a proportional control component and an integral control component exceeds a limit value of the control amount corresponding to the maximum capacity of the compressor. If this judgment is in the affirmative, an ordinary integral calculation is stopped, and the integral control component is determined by subtracting the proportional control component from this limit value.

Control system for variable-capacity compressor in air conditioner

An automobile air-conditioner capable of controlling the displacement of a compressor in view of the traveling condition and air-conditioning condition of an automobile so as to maintain a pleasant feeling of the air-conditioning and an accelerating ability of the automobile in harmony with each other. The air-conditioner includes an air-conditioning preference judgment device by means of which a normal control of the air-conditioning operation is maintained when the judgment of this judgment means indicates the existence of an air-conditioning preference condition. The air-conditioning is performed in preference to acceleration of the automobile depending on the degree of acceleration of the automobile even when the automobile is accelerated.

Automobile air-conditioner

An air conditioning control system for an automotive vehicle having an internal combustion engine. A variable capacity compressor has a pump having displacement thereof variable in response to a change in pressure within a controlled pressure chamber, a communication passage communicating between a low pressure chamber and the controlled pressure chamber, and a valve disposed to vary an opening area of the communication passage. An electromagnetic clutch connects and disconnects the compressor to and from the engine. An evaporator is connected to the compressor. A control unit controls the capacity of the compressor by supplying the valve with control current normally set within a predetermined range, to vary the opening area of the communication passage such that the temperature of outlet air from the evaporator becomes equal to a desired value. The control unit supplies the control current having a predetermined value larger than the above predetermined range over a predetermined time period to control the capacity of the compressor to the minimum value, when the electromagnetic clutch is brought into an engaged state from a disengaged state.

Air conditioning control system for automotive vehicles

An automobile air-conditioner wherein a direction of the sunlight coming into the passanger compartment of an automobile is detected, and if a deviated solar radiation is present, air-distribution is controlled to increase and decrease the quantity of air discharged from upper air outlets according to the detected solar radiating direction, while at the same time, louvers disposed in the respective air outlets are directed to an occupant to force conditioned air directly against the occupant. In the absence of the deviated solar radiation, the louvers are not directed to the occupant.

In a control apparatus for automobile air-conditioner of the type wherein the air blow-off mode is determined based on the opening of an air-mix door and the substantial temperature of an evaporator for actuating a mode door, the improvement which includes a judgment circuit for making a determination as to whether or not the outside air temperature is lower than a predetermined value in a heat mode operation and whether or not a defrosting operation is needed, and a bleed determination circuit for determining the amount of air bleed needed to be provided to a defrost outlet based on the result of the determination of the judgment circuit and the temperature of an upper part of the vehicle compartment. With this arrangement, the amount of air bleed provided to the defrost outlet can be varied continuously in accordance with the upper-part temperature in a range of between the heat mode and a defrost/heat mode.

Control apparatus for automobile air-conditioners

An apparatus for controlling an automotive air-conditioner wherein an air distribution to left and right sides of a vehicle passenger compartment is achieved either in an automatic control mode or in a manual control mode which is selected by a judgement made based on the vehicle passenger compartment and the quantity of solar radiation. In case of the automatic control mode, the rate of change of the air distribution control is changed dependent upon the position set by an air-distribution setting unit relative to the direction of solar radiation so as to meet the occupant desire.

Apparatus for controlling an automotive air-conditioner

An air flow control apparatus of an automobile air-conditioner is capable of controlling the air flow of a blower according to the thermal load within the passenger compartment. The air flow control apparatus limits the maximum air flow of the blower to a predetermined low level based on an external environmental condition such as, for example, the outside air temperature when the temperature of an upper part of the vehicle compartment is lower than a predetermined value.

Apparatus for controlling an air flow of an automobile air-conditioner

A control apparatus for an automobile air-conditioner includes a cooled air bypass passage provided independently of a main airflow passage for bypassing cooled air from an evaporator directly to a vent outlet; an opening calculation unit for calculating an opening of a cooled air bypass door based on a detected temperature and a desired temperature in the vicinity of the driver's head, and a drive unit for actuating the cooled air bypass door based on an opening calculated by the opening calculation unit. With this construction, the control apparatus is capable of controlling the temperature in the vicinity of the driver's head independently of a temperature control achieved by the main airflow passage.

An automobile air-conditioner wherein a total signal corresponding to a thermal load in the passenger compartment of an automobile and a head part total signal corresponding to a thermal load in the vicinity of the head of an occupant of the passenger compartment, then the thus obtained two total signals are used to determine two corresponding states of operation of a component involved in air-conditioning operation, and operation of the air-conditioning component is controlled based on one of the two total signals which is capable of providing an enhanced coolness to the occupant. According to a preferred embodiment, all the components involved in the air-conditioning operation are controlled based on the head part total signal.

Air-conditioner for automobile

In an air-conditioner for automobiles, cooled air having passed through an evaporator is immediately introduced through a cooled air bypass passage into the vehicle passenger compartment. The opening of a bypass door disposed in the bypass passage is adjusted based on a head part total signal corresponding to a thermal load in the vicinity of the head of an occupant which is obtained in view of the current discharge mode, or an auxiliary total signal corresponding to a thermal load in the vehicle passenger compartment which is obtained in view of the current discharge mode. With this arrangement, the occupant does never feel excess cold when the discharge mode is changed and hence a feeling of comfortableness toward the air-conditioning can be maintained.

Air-conditioning for automobiles

An apparatus for controlling an automobile air-conditioner wherein the direction of solar radiation is determined based on a signal which is obtained by retarding the leading edge of a solar radiation signal and the position of an air-distributing door is controlled according to the thus obtained signal. A signal whose leading and trailing edges are progressively increasing and decreasing, respectively, is used for the calculation of a signal corresponding to the thermal load in the vehicle passenger compartment. The operation of various components of the air-conditioner including a blower is controlled by the result of calculation of the thermal load signal.

An automobile air-conditioner controlling apparatus is equipped with a determination means for determining the amount of air bleeding from a defroster outlet, based on at least the outside temperature and the amount of opening of an air-mix door, when the temperature of blown-off air is higher than a predetermined temperature. By the determination means, the blow-off mode of the apparatus is automatically controlled over an expanded range when the outside temperature is low.

Growing community of inventors

Konan, Japan

Katsumi Iida