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. 01, 1997
Filed:
Aug. 05, 1996
Applicant:
Inventors:
Manfred Ruoff, Moglingen, DE;
Helmut Rembold, Stuttgart, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F01L / ; F15B / ; F15B / ;
U.S. Cl.
CPC ...
123 9017 ; 123 9031 ; 7456 / ; 464-2 ; 464160 ; 9141 / ; 91524 ;
Abstract
The electrohydraulic adjusting device for actuating a device for adjusting at least one camshaft of an internal combustion engine relative to its crankshaft has two differential pistons each of which serves to adjust a camshaft (intake camshaft or exhaust camshaft). Each of the two differential pistons have a small effective piston surface which is acted upon with pressure by a pump. An independent pressure control valve is associated with each of the pressure chambers on a larger effective piston surface, via which valve, the pressure in this pressure chamber can be controlled independently of the other differential piston.