| 摘要 |
<p>PURPOSE:To eliminate influence of deexciting resistance current by providing a transistor for controlling deexciting supply current which is electrically arranged between a deexciting resistance and a power supply terminal and controlled to be ON or OFF through an electromagnetic clutch disengaging signal. CONSTITUTION:A transistor 17 for controlling deexciting supply current is inserted in series to a deexciting resistance 12 between the deexciting resistance 12 and a power supply terminal T3. ON.OFF control of the transistor 17 is performed based on the disengaging signal SO of an electromagnetic clutch through a signal converting transistor 19 and a base resistance 18. The deexciting current is usually supplied when P (parking range) or N (neutral range) is selected in the running range and power transmission between an engine and a vehicle is stopped. Therefore, the electromagnetic clutch is in its disengaged condition. In this case, the transistor 17 is ON only at disengaging the clutch 4, and OFF at engaging the electromagnetic clutch 4. Hereby, influence of the deexciting resistance current Ic is eliminated when current of the electromagnetic clutch is detected.</p> |
