Method of controlling idling rotational speed of internal combus

Details Method of controlling idling rotational speed of internal combus Method of controlling idling rotational speed of internal combus

1989-05-24

1990-02-06

Wayner, William E.

Refrigeration

Processes

Compressing, condensing and evaporating

622285, 623234, 123339, 417 34, F02M 300, F25B 100

Patent

active

048980056

ABSTRACT:
A method of controlling the idling rotational speed of an internal combustion engine for an automotive vehicle equipped with an air conditioning system having a variable capacity compressor disposed to be driven by the engine and capable of being controlled by an external control signal. A value of a capacity control signal as the external control signal for controlling the capacity of the compressor is calculated. A value of torque required for starting the compressor is calculated based upon ambient temperature and the calculated value of the capacity control signal. The engine idling rotational speed is increased in accordance with the calculated starting torque. When the ambient temperature is higher than a predetermined value, the required starting torque is calculated based only upon the ambient temperature irrespective of the calculated value of the capacity control signal, whereas when the ambient temperature is lower than the predetermined value, the required starting torque is calculated based upon both the ambient temperature and the calculated value of the capacity control signal.

REFERENCES:
patent: 3103128 (1963-09-01), Gordon
patent: 4400935 (1983-08-01), Louis
patent: 4582124 (1986-04-01), Yoshimi et al.

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