US 9,810,282 B2
Damper with digital valve
Matthew L. Roessle, Temperance, MI (US); Karl C. Kazmirski, Temperance, MI (US); Jeroen K. Paenhuysen, Ypsilanti, MI (US); Darrell G. Breese, Ypsilanti, MI (US); Daniel T. Keil, Temperance, MI (US); Thomas P. Mallin, Temperance, MI (US); and Jeffrey T. Gardner, Woodland Park, CO (US)
Assigned to Tenneco Automotive Operating Company Inc., Lake Forest, IL (US)
Filed by Tenneco Automotive Operating Company Inc., Lake Forest, IL (US)
Filed on Mar. 6, 2017, as Appl. No. 15/450,885.
Application 14/134,390 is a division of application No. 12/573,911, filed on Oct. 6, 2009, granted, now 8,616,351, issued on Dec. 31, 2013.
Application 15/450,885 is a continuation of application No. 14/849,092, filed on Sep. 9, 2015, granted, now 9,695,900.
Application 14/849,092 is a continuation of application No. 14/134,390, filed on Dec. 19, 2013, granted, now 9,150,077, issued on Oct. 6, 2015.
Prior Publication US 2017/0175842 A1, Jun. 22, 2017
Int. Cl. F16F 9/34 (2006.01); F16F 9/50 (2006.01); F16F 9/18 (2006.01); F16F 9/46 (2006.01); F16F 15/023 (2006.01); B60G 13/08 (2006.01); B60G 17/08 (2006.01)
CPC F16F 9/50 (2013.01) [B60G 13/08 (2013.01); B60G 17/08 (2013.01); F16F 9/18 (2013.01); F16F 9/185 (2013.01); F16F 9/34 (2013.01); F16F 9/469 (2013.01); F16F 15/023 (2013.01); B60G 2202/24 (2013.01); B60G 2206/41 (2013.01); B60G 2500/11 (2013.01); F16F 2222/12 (2013.01); F16F 2228/066 (2013.01); F16F 2232/08 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A shock absorber comprising:
a pressure tube forming a working chamber;
a piston assembly slidably disposed within said pressure tube, said piston assembly dividing said working chamber into an upper working chamber and a lower working chamber, said piston assembly including a piston body defining a first fluid passage extending through said piston body and a first valve assembly controlling fluid flow through said first fluid passage;
a second fluid passage separate from said first fluid passage, said second fluid passage extending from one of said upper and lower working chambers to a fluid chamber defined at least in part by said pressure tube;
a plurality of digital valve assemblies configured to exclusively control all fluid flow through said second fluid passage and thus all fluid flow between said one of said upper and lower working chambers to said fluid chamber;
wherein fluid flow through said first valve assembly generates a high damping load for said shock absorber;
fluid flow through said first valve assembly and said digital valve assemblies cooperatively generates a low damping load, lower than said high damping load, for said shock absorber; and
each of said plurality of digital valve assemblies includes a first member, a second member disposed within said first member to move in an axial direction within said first member, and a third member configured to move said second member in the axial direction;
said second member and said first member of each one of said digital valve assemblies cooperating to exclusively control said fluid flow through said second fluid passage in the axial direction;
each of the digital valve assemblies includes a single inlet, and a first outlet; and
fluid flow from said single inlet to said first outlet is in a first direction substantially parallel to the axial direction.