Processing system for crankshaft angle includes crankshaft angle sensor

摘要

The level of the crankshaft angle from the sensor output side to the point of the pulse prodn. is at a high level, and at the time of no pulse prodn. is st at a low level. An input side circuit of the processor switch circuit (13) includes a voltage redn. switch circuit (15). The voltage redn. switching circuit is operated up to the time of the pulse prodn. and the voltage source voltage is lowered, and this is applied at an arithmetic processing section of a CPU (17). The switch (12) is connected with the voltage source (VB) across a resistance (11).