公开(公告)号：US20180274622A1

公开(公告)日：2018-09-27

申请号：US15464735

申请日：2017-03-21

Applicant: Tenneco Automotive Operating Company Inc.

Inventor： Nikolay H. IORDANOV ,  Craig MARKYVECH

IPC: F16F9/32 ,  B60G13/08 ,  B60G17/08 ,  B60G17/015

CPC classification number: F16F9/3292 ,  B60G13/08 ,  B60G17/0152 ,  B60G17/08 ,  B60G2202/24 ,  B60G2206/0116 ,  B60G2500/114 ,  F16F9/3242 ,  F16F9/3257 ,  F16F9/46 ,  F16F2230/18 ,  H01F7/1805 ,  H01H47/04

Abstract: A damper system may include an electrically adjustable hydraulic shock absorber having an electromechanical valve and a damper controller. The damper controller may include a solenoid driver circuit electrically coupled to the electromechanical valve, and disposed at the shock absorber. The solenoid driver circuit may be operable to drive the electromechanical valve in an open state in which hydraulic fluid flows between a pressure tube and a reserve tube. The solenoid driver circuit may include a plurality of transistors that are operable to generate a first current to place the electromechanical valve in the open state and a second current less than the first current to hold the electromechanical valve in the open state.