The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 2017
Filed:
May. 12, 2015
Dr. Ing. H.c. F. Porsche Aktiengesellschaft, Stuttgart, DE;
Michael Paul, Weissach, DE;
Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Stuttgart, DE;
Abstract
An internal combustion engine with an adjustable compression ratio has a switchover valve () for controlling hydraulic oil flow in chambers of an eccentric adjustment device. The switchover valve () has a switching element () and a sleeve-shaped connecting section () with a first bore () that connects to a first hydraulic line (), a second bore () that connects to a second hydraulic line (), and a venting bore () that connects to a vent (). The switching element () can be displaced in the connecting section () between a first position (S) where a groove in the switching element () connects the first hydraulic line () to the venting duct () or a second position (S) where the groove () connects the second hydraulic line () to the venting duct (). A pick-off element () extends through the connecting section () and interacts with the switching element ().