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Patent Searching and Data


Title:
SYSTEM FOR DRIVING ACTUATOR IN MOTOR VEHICLE
Document Type and Number:
Japanese Patent JP3532589
Kind Code:
B2
Abstract:

PURPOSE: To prevent jam of actuators without changing the conventional structure of the actuator.
CONSTITUTION: Actuators 114, 116, 118 in a motor vehicle are driven in a switched manner between two frequencies f1, f2 which cause oscillations of different amplitude according to a predetermined time sequence by a pulse-width- modulated signal uPWM. In operation regions other than idling without failure, the actuators are driven with the frequency f2 which causes relatively strong oscillations, and are driven with the frequency f1 which causes weak oscillations at idling, or are driven with the frequencies f1 and f2 repeatedly according to a predetermined sequence. Thus, it is possible to prevent the jam produced in the actuators for a long time.


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Inventors:
Entenmann, Robert
Klatt, Alfred
Moz, Rudolf
Application Number:
JP11752793A
Publication Date:
May 31, 2004
Filing Date:
May 20, 1993
Export Citation:
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Assignee:
ROBERT BOSCH GMBH
International Classes:
F02D41/20; F02D31/00; F02D35/00; F02D41/22; F02D45/00; (IPC1-7): F02D45/00; F02D41/20
Attorney, Agent or Firm:
加藤 卓