Twin tube hydraulic compesator for a fuel injector
First Claim
1. A compensator for longitudinally positioning along an axis a device relative to a body, the compensator comprising:
- a first tube extending along the axis from a first end portion occluding the first tube;
a second tube being telescopically received in the first tube, the second tube extending along the axis from a second end portion generally occluding the second tube and defining an orifice;
a piston being telescopically received in the second tube; and
a fluid being displaceable through the orifice to move the first tube relative to the second tube.
7 Assignments
0 Petitions
Accused Products
Abstract
A fuel injector preferably has a body, a closure member, a piezoelectric device, and a hydraulic thermal compensator. The body extends along an axis. The closure member is displaceable with respect to the body between a first configuration and a second configuration. The first configuration prevents fuel flow through the body, and the second configuration permits fuel flow through the body. The piezoelectric device displaces the closure member from the first configuration to the second configuration. The compensator is coupled with the piezoelectric device and includes a first tube, a second tube, a piston, and fluid. The first tube extends along the axis from a first end portion that occludes the first tube. The first end portion contiguously engages a first one of the body, the closure member, and the piezoelectric device. The second tube is telescopically received in the first tube. The second tube extends along the axis from a second end portion that generally occludes the second tube and that defines an orifice. The second tube is fixed with respect to a second one of the body, the closure member, and the piezoelectric device. The piston is telescopically received in the second tube. And the fluid is displaceable through the orifice to move the first tube relative to the second tube.
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Citations
20 Claims
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1. A compensator for longitudinally positioning along an axis a device relative to a body, the compensator comprising:
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a first tube extending along the axis from a first end portion occluding the first tube;
a second tube being telescopically received in the first tube, the second tube extending along the axis from a second end portion generally occluding the second tube and defining an orifice;
a piston being telescopically received in the second tube; and
a fluid being displaceable through the orifice to move the first tube relative to the second tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A fuel injector comprising:
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a body extending along an axis;
a closure member displaceable with respect to the body between a first configuration and a second configuration, the first configuration preventing fuel flow through the body, and the second configuration permitting fuel flow through the body;
a piezoelectric device displacing the closure member from the first configuration to the second configuration; and
a compensator coupled with the piezoelectric device, the compensator including;
a first tube extending along the axis from a first end portion occluding the first tube, the first end portion contiguously engaging a first one of the body, the closure member, and the piezoelectric device;
a second tube being telescopically received in the first tube, the second tube extending along the axis from a second end portion generally occluding the second tube and defining an orifice, the second tube being fixed with respect to a second one of the body, the closure member, and the piezoelectric device;
a piston being telescopically received in the second tube, and a fluid being displaceable through the orifice to move the first tube relative to the second tube. - View Dependent Claims (14, 15, 16, 17)
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18. A method of assembling a compensator for a fuel injector, the method comprising:
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providing a first tube extending along an axis from a first end portion occluding the first tube;
filing the first tube with a volume of a fluid;
inserting a second tube telescopically in the first tube, the second tube extending along the axis from a second end portion generally occluding the second tube and defining an orifice, and the orifice being submerged in the volume of the fluid;
inserting a piston telescopically in the second tube, the piston including an aperture; and
inserting a plug in the aperture. - View Dependent Claims (19, 20)
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Specification