Nippondenso Co., Ltd.

Toyota Jidosha Kogyo Kabushiki Kaisha

Masanori Naganoma

Yasuhiro Iwata

Kiyoshi Usami

Teiichi Nabeta

Yasuhumi Kojima

Atsunori Saito

Nobuo Kondo

Hitoshi Hibi

Kunihiko Suzuki

Tetsuo Fujii

Katsunori Ito

Masao Sakurai

Yoshimichi Hara

Katsuaki Matsushima

Eiichi Senda

Mitsutoshi Moriya

Norio Maehara

Kazuaki Takemoto

Yoshiharu Kato

Kiyoshu Usami

Minoru Hashimoto

Nobuyoshi Ohta

A control circuit for a vehicle-mounted air conditioner having plural dampers therein comprises a manual command entry unit for entering command signals to a computer unit. The computer unit includes a first computer constantly powered by a vehicle-mounted storage battery to receive a temperature resetting command signal from the entry unit and a second computer which is powered from the battery through an engine ignition key switch to receive control data from the first computer to control the air conditioner. A plurality of operating parameter sensors also supplies sensed operating parameters to the second computer to permit it to control one or more of the dampers to direct conditioned air to the vehicle compartment. A display unit receives data from the computer unit to provide visual display of the reference temperature and the operating conditions of the air conditioner.

System for controlling a vehicle-mounted air conditioner

Temperature sensing device which has a temperature sensing part including a microchip thermistor in the form not greater than a very small thin piece having a volume of 2 mm.sup.3 as a temperature sensing element. The temperature sensing part is connected to an external circuit to which a temperature sense signal is to be transmitted, by lead wires, and the microchip thermistor is connected to the lead wires through fine lead wires having a wire diameter not greater than 0.5 mm.

Temperature sensing device

An apparatus for controlling an air conditioner for an automobile comprises: an air conditioning unit including a heater unit for heating air passing through an air supply duct and a device for adjusting the amount of air passing through said duct, an air distributing unit for effecting switching among a plurality of air supply outlets into a compartment of the automobile, the unit including a ventilation supply outlet, and an air bypass containing an air valve for supplying cool air upstream of the heater unit to the ventilation supply outlet; a compartment temperature setting unit for setting a desired temperature value within the compartment; sensing units for sensing the temperature within the compartment and the amount of insolation in the compartment; a processing unit responsive to output signals from the compartment temperature setting unit and the sensing units for determining the desired temperature of air supplied to the compartment and for deciding relationships between the air supply temperature and the sensed insolation amount in accordance with preset values corresponding thereto; and means for actuating the air distributing unit and the air valve within the air bypass in response to output signals of the processing unit, whereby the apparatus maintains the temperature within the compartment at the desired value and controls the supply of cool air through the air bypass in response to the sensed insolation amount.

Apparatus for controlling air conditioners for automobiles

In an electric control method for an automobile air conditioner, a digital computer is utilized to calculate a function required to direct the actual in-car temperature toward a desired value in consideration with various changes of ambient temperature and the calculation is compensated to effectively reduce a difference between the actual in-car temperature and the desired value when the rate of change of the actual in-car temperature becomes below a predetermined value.

Electric control method for automobile air conditioner

An automotive abnormality forecasting and warning method and system for issuing a voice and visual alarm when a signal representing the condition of an automotive inspection item exceeds a predetermined value, which comprise steps of calculating the cooling water temperature change rate in variable cycles, determining a calculation cycle corresponding to the detected water temperature and the calculated change rate from a memory storing the cooling water temperature, water-temperature-change rate and calculation cycle in a predetermined relation, judging whether the detected water temperature and the calculated change rate are in a predetermined water overheat region, and issuing a voice alarm on an overheating trend in response to more than a predetermined number of the judging operations.

Method and system for forecasting and warning on automotive abnormalities

A vehicle air conditioner control method and apparatus for automatically controlling the air conditioning of the compartment of a vehicle in accordance with a predetermined automatic control pattern, uses a selector for selecting a desired air conditioning condition. In response to the command signal from the selector, changeover from the control parameters, such as, air flow rate and supply air temperature for an automatic control mode to the selected control parameters for a selected air conditioning mode is effected, thus making it possible to selectively control the air conditioning of the vehicle compartment in accordance with a predetermined automatic control mode and a selected air conditioning mode.

Air conditioner control method and apparatus

In an electric control method and apparatus for an automobile air conditioning system, an air-blend door is arranged between an evaporator and a heater within an air duct to control an amount of the cooled air flowing through the heater into a passenger compartment and to control an amount of the cooled air directly flowing into the compartment, and a refrigerant compressor for the evaporator is connected to a prime mover of the automobile when the air-blend door is opened to allow the cooled air flowing through the heater in a limited range and is disconnected from the prime mover when the air-blend door is further opened to allow the cooled air flowing through the heater beyond the limited range.

Electric control method and apparatus for automobile air conditioning

A method and apparatus for controlling an automobile air conditioner wherein a deviation between the actual in-car temperature and a desired in-car temperature is periodically calculated to detect such various thermal disturbances as changes of the solar heat, the temperature of outside air, the number of passengers and the like, and wherein a compensation value of the opening angle of the air-blend door is determined in accordance with the periodical variation of the deviation to ensure stable control of the in-car temperature.

Method and apparatus for controlling automobile air conditioners

An electric control method and apparatus for an automobile air conditioner which is capable of conducting recirculation of inside air from a passenger compartment into an air duct under undesired outside air conditions caused by noxious gases, dust and the like and is also capable of conducting induction of outside air into the compartment through the air duct when the undesired outside air conditions are extinguished.

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Kariya, Japan

Masanori Naganoma