Data processing: generic control systems or specific application – Specific application – apparatus or process – Mechanical control system
Reexamination Certificate
2005-09-14
2010-12-14
Rodriguez, Paul L (Department: 2123)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Mechanical control system
C700S056000
Reexamination Certificate
active
07853360
ABSTRACT:
A PWM signal on which a dither signal is superimposed is used for adjusting a central position when controlling a solenoid valve. To improve this type of control process in which the amplitude of the dither signal depends on the current of the solenoid valve and thus on the PWM signal, the PWM signal and the dither signal are generated in a computer unit independently of the power regulation process. Forming the signals separately has the advantage of generating a constant amplitude for the dither signal each time a triggering signal is generated for the solenoid valve such that the armature of the solenoid valve can oscillate specifically about the central position and thereof at constant small vibrations. This allows frictional forces to be reliably reduced and the solenoid valve to be switched more rapidly while the load on the main computer is reduced.
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Kuehn et al., PCT Pub. No. WO-2004/027529-A1 with English translation, Apr. 1, 2004.
Kissler Fernandez Jose Cruz
Thomas Röhrl
Continental Automotive GmbH
Greenberg Laurence A.
Locher Ralph E.
Rodriguez Carlos Ortiz
Rodriguez Paul L
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