Title:
【発明の名称】改良式ブートストラップパワーステアリングシステム
Document Type and Number:
Japanese Patent JPH09502236
Kind Code:
A
Abstract:
Methods and devices for enabling simplified bootstrap hydraulic systems for use in bootstrap hydromechanical and electrohydraulic vehicular power steering systems are disclosed. A simplified bootstrap control valve is provided wherein the control valve's load circuit is not interdicted in any way. The simplified bootstrap control valve comprises a four-way control valve having input slots formed in an open-center manner, intermediate slots formed in an open-center manner, return slots formed in a closed-center manner, and a passage for picking off the pressure value present in the intermediate slots. The pressure value present in the intermediate slots is utilized for regulating pumping apparatus providing fluid to the simplified bootstrap control valve such that pressure value present in the intermediate slots is substantially maintained at a preselected value. A simplified servo motor-positive displacement pump assembly of integrated construction is also provided. The simplified servo motor-positive displacement pump assembly includes a common central housing and a quill drive.
Inventors:
Phillips, edward
Application Number:
JP50604995A
Publication Date:
March 04, 1997
Filing Date:
July 29, 1994
Export Citation:
Assignee:
Tekco Corporation
International Classes:
B62D5/07; B62D5/06; B62D5/065; B62D5/083; B62D6/00; B62D6/02; F04B49/00; F04C14/00; F04C14/22; F04C14/26; F04C15/06; H02K7/14; (IPC1-7): F04B49/00; B62D5/07
Attorney, Agent or Firm:
Kitamura Osamu