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
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United States of America Patent
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Oct 29, 2019
Grant Date -
Jan 25, 2018
app pub date -
Jan 26, 2016
filing date -
Feb 26, 2015
priority date (Note) -
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Abstract
A method for simulating malfunctioning solenoid valves is disclosed. A current flows through a solenoid valve in order to achieve opening and closing. The closing is forced after the current supplied to the solenoid valve is activated at an activation time, and the opening is forced after the current is deactivated. The current is applied with a charging current strength before activation for a charging phase, and after activation, the current is increased to peak current strength and subsequently reduced to a holding current strength. The current strength is reduced to a deactivation current strength, after which the current strength increases again. A variation of the value or duration of the current strength or an application of an additional magnetic force is used to simulate a premature activation, a delayed activation, a premature deactivation, or a delayed deactivation.
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