Air-conditioning control method for a vehicle

Refrigeration – With indicator or tester – Operatively correlated with automatic control

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62208, 236 91R, B60H 100

Patent

active

055820212

ABSTRACT:
An air-conditioning control method for a vehicle which can continue smoothly control close to ordinary automatic control before failure even when a specific detection sensor goes wrong. When one of the plurality of detection sensors malfunctions, the size of an environmental factor corresponding to the malfunctioning detection sensor is calculated from a heat balance calculation model for various environmental factors. A correction term for the processing of a low-pass filter is added to this estimated value to obtain a highly accurate estimated value. When control of the air-conditioner is continued based on this highly accurate estimated value and output values of the normal detection sensors, the same control status as that of control of the air-conditioner before malfunctioning can be obtained even during shift from the output of the detection sensor to the estimated value.

REFERENCES:
patent: 4432210 (1984-02-01), Saito
patent: 4696167 (1987-09-01), Matsui et al.
patent: 4744511 (1988-05-01), Kakehi et al.
patent: 5115643 (1992-05-01), Hayata et al.

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