초록 ▼

An apparatus for resetting computing devices, particularly devices for fuel proportioning or fuel injection, for adjusting ignition timing, and the like, which are controlled by microprocessors, includes a resetting circuit to evaluate the change in the switching state of the ignition lock switch of

An apparatus for resetting computing devices, particularly devices for fuel proportioning or fuel injection, for adjusting ignition timing, and the like, which are controlled by microprocessors, includes a resetting circuit to evaluate the change in the switching state of the ignition lock switch of the motor vehicle when restarted. The evaluation is effected independently of the supply voltage still at the computing device due to a self-sustaining circuit, by means of an integrated differentiation and the differentiation voltage is fed to a comparator at whose output the reset pulse is formed.

대표청구항 ▼

A circuit for resetting computing devices of computer-controlled electrical control systems in motor vehicles, which computing devices are automatically connected to a supply voltage for a predetermined period of time controlled by the computing devices after switching-off an ignition lock switch of

A circuit for resetting computing devices of computer-controlled electrical control systems in motor vehicles, which computing devices are automatically connected to a supply voltage for a predetermined period of time controlled by the computing devices after switching-off an ignition lock switch of the motor vehicle, comprising evaluating means connected to a terminal of said ignition lock switch to produce a reset pulse for said computing devices in response to the switching-on of said switch during restarting of the vehicle, and independent of the automatic connection of said supply voltage to said computing devices, and wherein the switching-on of the ignition lock switch is evaluated by means of differentiation of a switch-on pulse on said terminal of the ignition lock switch.