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. 03, 2007
Filed:
Apr. 13, 2005
Masaki Okada, Fujisawa, JP;
Masaki Okada, Fujisawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
The present invention provides a fuel injection valve which moves a needle valve () via a viscous fluid and a piston () by having an actuator () move a cylinder (). The fuel injection valve comprises a sealing member () for sealing a gap between the cylinder () and piston (), and a linking hole () formed in the piston () for connecting two chambers () to each other. The size and/or shape of the linking hole () is set such that when a force for moving the cylinder () or piston () at a lower speed than the driving speed of the actuator () is generated due to differential thermal expansion between members, the viscous fluid moves between the two chambers () through the linking hole (), and when a force for moving the cylinder () at a higher speed than the force generated by the differential thermal expansion is generated by the actuator (), the viscous fluid cannot pass through the linking hole ().