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. 18, 2000
Filed:
Dec. 17, 1998
Clifford E Cotton, Dunlap, IL (US);
Caterpillar, Inc., Peoria, IL (US);
Abstract
An actuation fluid control valve for a hydraulically actuated fuel injector comprises an injector body having a high pressure actuation fluid supply passage for admitting high pressure hydraulic actuation fluid into the fuel injector, an actuation fluid control passage for admitting the high-pressure hydraulic actuation fluid to commence fuel injection, a low-pressure actuation fluid drain passage for draining the hydraulic actuation fluid from the fuel injector, and a check valve fluid control passage for admitting the high pressure hydraulic actuation fluid to terminate fuel injection. An actuator is attached to the injector body. A rotatable valve member includes a first valve passage and a second valve passage and is disposed in the injector body such that high pressure actuation fluid entering from the high pressure actuation fluid supply passage will not bias the rotatable valve member either toward the first position or toward the second position. The rotatable valve member is rotatable in response to the actuator between a first position in which the high pressure actuation fluid supply passage is in fluid communication with the actuation fluid control passage via the first valve passage, and a second position in which the high pressure actuation fluid supply passage is not in fluid communication with the actuation fluid control passage.