Calsonic Corporation

Masatoshi Suto

Hideki Sunaga

Tsuneaki Odai

An electronic climate control system for an automotive vehicle comprises a by-pass passage for delivering cool air flowing through an evaporator core directly to discharged-air ventilators, a by-pass door provided at a communication inlet of the by-pass passage for adjusting a flow rate of cool air through the by-pass passage, a hot-water valve provided for adjusting a flow rate of hot coolant to a heater core, and an actuator being common to the by-pass door and the hot-water valve for adjusting a bypass-door opening and a water-valve opening. The actuator acts to fully close the water valve when the by-pass door is fully opened. Also provided are a climate control panel for selecting one of discharged-air outlet modes, a by-pass PBR for monitoring the bypass-door opening, and a control unit for limiting the bypass-door opening to a value less than a maximum opening equivalent to a full-open position of the by-pass door when a predetermined discharged-air outlet mode except VENT mode is selected by the control panel.

Electronic climate control system for automotive vehicles

An external interrupt port is installed for writing a password into a random access memory by monitoring low voltage with an interrupt when a battery is turned off and on instantaneously and performing ignition off processing. During Random access memory initialization the system disables an external interrupt and initializes output of ports containing the external interrupt port when an ignition switch is turned on, next makes a password check just after initializing output of the ports, then enables an external interrupt and executes initialization.

Initialization processing system of in-car microcomputer

In the air conditioning apparatus, the air conditioning amplifier unit e is connected to the plurality of door actuators through a single communication line and a single power source line, and also there is provided a fan motor maximum voltage limit control means which not only can create a communication signal to be transmitted through the single communication line in the form of two-way signals including a transmission signal containing door target stop position data to be transmitted to the door actuators, and a response signal to be sent back from the door actuators, but also, when the door target stop position data transmitted last time is different from the door target stop position data transmitted this time, can exert a maximum voltage limit on a fan motor, and, when the signal to be sent back from the door actuators, to the air conditioning amplifier unit is a control end signal which indicates that the door position reaches the target position and the door control is ended, can remove the exertion of the maximum voltage limit.

Air conditioning apparatus in an air conditioning system for use in a

A vehicle air-conditioning system includes an air-conditioning amplifier unit being connected to a plurality of door actuators through one communication and one power line; and the air-conditioning amplifier unit having first door-operation self-diagnostic means which sends to the door actuator target stopping position data for bringing doors in a full-open condition or full-close condition; if there is a change in an instruction value, after the lapse of a preset period of time which takes into account the time period required for the door to arrive at a target position and a lag in communication, the self-diagnostic means determining that the doors are in a normal condition when the signal returned from the door actuator represents that the doors are in a stopped state but determining that the doors are in an abnormal condition when the signal represents that the doors are in an actuated state.

Vehicle air-conditioning system

An air-conditioner amplifying means and a plural number of door actuators are connected by a single communication line, which transmits target stop-position data of the individual doors in accordance with predetermined locations. Target door opening-degree determining means determines whether the door is to be opened or closed depending on a positive or negative value of the temperature deviation, and judges a value of the temperature deviation in two or larger decision regions in determining the present door opening degree, wherein as temperature to which the decision region is applied for deciding the temperature deviation is large, a value of a fixed opening degree to be added to and subtracted from the preceding target door opening degree is larger.

Air-mixing door opening-degree control device for an automotive vehicle

In the middle of the grid signal wire connecting the grid terminal of the clock drive IC with that of the clock fluorescent display tube, the illumination control circuit is arranged, wherein in accordance with the illumination control signal, the illumination control circuits converts the first grid input signal and the second one by the 1/2 duty signal into the first grid output signal and the second one by a pulse signal, the pulse width of which is changed according to the illumination control signal.

Operating section display unit of air conditioning system for vehicle use

In the case of failure in communication between the control unit and the control panel in the manual operation of a car air conditioner, the operation mode is changed over to an automatic mode to introduce the outside air. In the case of failure in communication between the control unit and the mode door actuators, the compressor is turned on to introduce the outside air.

Air conditioner for automobile use

An electronic climate control system for a car air conditioner comprises sensors for detecting an ambient temperature, an in-car temperature and a heat load, a climate control unit responsive to signals from the sensors for adjusting an interior environment within the vehicle passenger compartment towards desired in-car temperature and humidity conditions, a manual-input panel for manually setting a system's operating mode, and a communications line between the climate control unit and the manual-input panel. The climate control system has a fail-safe function for automatically selecting an automatic air-conditioning mode and/or a fresh-air mode as the system's operating mode necessary to prevent any moist air from fogging the windshield in the presence of a failure in communication between the control panel and the control unit.

Growing community of inventors

Tokyo, Japan

Masatoshi Suto