| 摘要 |
PURPOSE:To protect the contact of a compressor relay by arranging the constitution in such a way that the stoppage of a compressor relay may be delayed by a specified time when a pressure switch in a reserve tank is changed from ON to OFF, in the above-mentioned suspension device provided with adjustment function for car floor height. CONSTITUTION:When a pressure switch 5 is turned OFF by a car floor height adjustment signal (a) and chattering occurs, a timer circuit T1 is triggered and turned ON for a specified time. And the signal of a pressure switch 5 is input into OR circuit OR1, but since the output from a timer circuit T1 is ON, the output of OR1 keeps an ON condition. Consequently, a compressor relay 17 performs a usual operation and stops operation after a specified time. Therefore, there is never such a case where a starting current flows whenever the pressure switch 5 is closed or opened for a short time in the driving circuit of a compressor 1 and it is possible to contrive to protect a relay contact. |
