Method for simulating extreme or defective solenoid valves for demonstrating the failure effect and for detecting faults in order to certify a vehicle diagnosis system

A method for simulating malfunctioning solenoid valves for an internal combustion engine by influencing an activation time and a deactivation time of the solenoid valve, the method comprising:

• energizing the solenoid valve with current of a predetermined, variable current strength for realizing opening and closing processes, forcing the closing process after activation of a current feed to the solenoid valve at an activation point in time, and forcing the opening process after a deactivation of the current feed to the solenoid valve at a deactivation point in time, before the activation point in time applying the current with a charging current strength for a duration of a charging phase and starting from the activation point in time increasing the current to a peak current strength and then reducing the current to a holding current strength, and starting from the deactivation point in time further reducing the current strength to a deactivation current strength, wherein after a time offset the current strength (I) increases again due to inductance, and using at least one of a variation of a magnitude, a duration of the current strength, or application of an additional magnetic force for simulating at least one of an advanced activation, a retarded activation, an advanced deactivation, or a retarded deactivation.