Diesel Kiki Co., Ltd.

Zexel Gmbh

Nissan Motor Company Limited

Kazuo Fujii

Takayoshi Matsuoka

Junichiro Hara

Mamoru Masauji

Isao Takahashi

In order to provide a control apparatus for an air conditioning system for an electric vehicle which achieves smooth switching of operating modes, a decision is made as to whether or not the operating mode set by a means for air conditioning mode setting has been maintained for a specific length of time and also, a decision is made by a means for compressor rotation rate decision making as to whether or not the actual rotation rate of the compressor is at the minimum rotation rate. With this, if the operating mode set by the means for air conditioning mode setting has not been maintained for the specific length of time, or, if the operating mode has been maintained for the specific length of time but the actual rotation rate of the compressor is not at the minimum, the rotation rate of the compressor is set at the minimum rate by a means for shift mode setting so that the operating mode is switched only when the operating mode set by the means for air conditioning mode setting has been maintained for the specific length of time and the actual rotation rate of the compressor is at the minimum rate, and the compressor is controlled based upon the air conditioning level set by the means for air conditioning mode setting.

Control apparatus for an air conditioning system for an electric vehicle

Compressor discharge capacity is controlled by using the smaller value as a desired cooling temperature for control, comprising a first desired evaporator cooling temperature computed from the pattern of the desired cooling temperature characterized by its being high when a cooling load is low, with a second desired evaporator cooling temperature computed from the pattern of the desired cooling temperature characterized by its being high when the outdoor temperature is moderate, and by its being low when the outdoor temeprature is low or high. Therefore, if the desired temperature is set high in a passenger compartment when the outdoor temperature is high, or if a cooling load is low when the outdoor temperature is low, the desired cooling temperature can be kept low for controlling while maintaining high dehumidifying capacity.

Automobile air conditioner compressor discharge capacity controller

An apparatus for controlling the operation of an automobile air-conditioner of the type including a variable displacement compressor capable of controlling the discharge rate of a refrigerant in response to an externally supplied compressor displacement signal, wherein a total signal is calculated based on at least a vehicle compartment temperature, an outside air temperature, a solar radiation quantity, and a setting signal from a temperature setter, and when a rapid cooling is designated by the total signal, the displacement of the compressor is fixed at a maximum level for a predetermined period of time so as to preclude an undesired drop of the cooling power which would otherwise occur from the middle to the final stage of the rapid cooling operation.

Apparatus for controlling automobile air-conditioner

In an apparatus for controlling a variable displacement compressor incorporated in an automobile air-conditioner, the displacement of the compressor is varied with a change in the target cooling temperature. The change rate of the target cooling temperature thus changed is limited to such an extent that a sudden change in displacement of the compressor is prevented to maintain the drivability of an automobile and to change the cooling power of the evaporator gently, thereby keeping a pleasant feeling during the temperature regulating operation. The change rate of the target cooling temperature can be selected from a plurality of predetermined values to meet a current controlling condition so that the reliability of the air-conditioner is improved.

Apparatus for controlling compressor of automobile air-conditioner

An air conditioning control system for an automotive vehicle, comprises a compressor controllable in capacity in response to an external control signal, an evaporator connected to the compressor, a sensor for sensing a temperature of the evaporator, an arithmetic control section for calculating a value of the control signal based upon an output from the sensor, and an output section for supplying the control signal having a value calculated by the arithmetic control section to the compressor. The arithmetic control section carries out first mode control in which it calculates the value of the control signal so that the temperature of the evaporator is held at a predetermined value. The arithmetic control section carries out, in addition to the first mode control, second mode control in which, if a predetermined condition is satisfied, it calculates the value of the control signal so that the capacity of the compressor is brought to the maximum value, for a limited period of time after the compressor is started.

Air conditioning control system for automotive vehicles

An automobile air-conditioner of the type having a variable displacement compressor, wherein a desired degree to which an evaporator is cooled is calculated by a desired cooling degree calculation means, and a desired rotational speed of a blower is calculated by a desired rotational speed calculation means. The results of calculation by both of the calculation means are used for controlling the displacement of the variable displacement compressor. Thus, the displacement of the compressor is corrected in immediate response to a change of thermal loads.

Air-conditioner for automobiles

A demisting control system of an air conditioner for automotive vehicles, which comprises an evaporator, and a variable capacity compressor capable of being controlled in capacity from the outside. An actual cooling degree of the evaporator is detected. At least two desired cooling degrees of the evaporator are set. The detected actual cooling degree and each of the set at least two desired cooling degrees are compared with each other. On the basis of the comparison results, a value of the capacity to which the compressor is to be controlled is determined. The at least two desired cooling degrees are selected one by one in predetermined sequence and each selected desired cooling degree is compared with the actual cooling degree as above for a predetermined time period exclusively provided therefor. The compressor is driven so that its capacity is brought to the value of capacity determined as above.

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Konan, Japan

Kazuo Fujii