| 摘要 |
PURPOSE:To simplify the construction of the device in the title and attempt for sure economical fuel consumption running by sensing and displaying sudden acceleration and deceleration through comparison of the revolution signal and car speed signal through a specified circuit. CONSTITUTION:A device 1 has a sensor 2 that outputs engine revolution signal R1 and a sensor 3 that outputs car speed signal S1. The signals R1 and S1 are respectively treated through a wave form shaping circuits 4 and 10, differentiation circuits 5 and 11, monostable multivibrator 6 and 12, integration circuits 7 and 13, amplification circuits 8 and 14, and they are applied to a comparison circuit 9 as a revolution voltage signal Vr and car speed voltage signal Vs. Specified sudden acceleration and deceleration are sensed by means of mutually differentiating the integration time constant of the integration circuits 7 and 13. In this case a difference of levels corresponding to a sudden acceleration or deceleration is developed between the signals Vr and Vs, and if the difference between them goes over a specified value, the LED 27 is lighted to alarm the operator. |
