Method for simulating extreme or defective solenoid valves to demonstrate the failure effects and fault detection for the certification of a vehicle diagnostic system

摘要

The invention relates to a method for simulating poor solenoid valves (1) for an internal combustion engine by influencing a turn-on time (16) and a turn-off time (17) of the solenoid valve (1), wherein the solenoid valve (1) with current of a predetermined variable current to achieve a Is energized opening and closing, after switching on the solenoid valve (1) current supplied to the switch-on time (18) closing is enforced and after switching off the solenoid valve (1) current supplied to the switch-off time (19) the opening is enforced, before the switch-on time (18) for the period of a charging phase (9) the current with a charging current (15) is applied and from the switch-on (18) the current is increased to peak current (13) and subsequently lowered to a holding current (14), Furthermore, from the turn-off time (19), the current reduces to a turn-off current rt, wherein after a time offset, the current (I) inductively increases again, with a variation of the magnitude and / or duration of the current and / or an application of additional magnetic force for simulating a premature switch on, a delayed switch on, a premature switch off and / / or a delayed switch-off is used.