Selector mechanism for dual-clutch transmissions
First Claim
1. A shift apparatus for a multispeed transmission, wherein the multispeed transmission includes multiple gear groups having alternating speed ratios, the apparatus comprising:
- a first shift member connected to a first shift shaft;
a second shift member connected to a second shift shaft, wherein the first shift member and the second shift member are selectively moveable for engaging a speed ratio of the transmission; and
a single shift finger for engaging at least a portion of one of the shift members, wherein the shift finger is moveable generally in a first generally orthogonal direction to engage the first shift member when in a first engaged configuration, the shift finger is moveable generally in the first generally orthogonal direction to engage the second shift member when in a second engaged configuration, the shift finger, when in an intermediate configuration, is moveable generally in the first generally orthogonal direction such that the shift finger cannot contact one of the shift members, and wherein the shift finger is selectively moveable generally in a second generally orthogonal direction between the first engaged configuration, the intermediate configuration, and the second engaged configuration,wherein the single shift finger, when engaged with the second shift member, is configured to move the second shift shaft in opposite axial directions to engage a target gear.
2 Assignments
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Accused Products
Abstract
An embodiment provides a method shifting a multispeed transmission. The multispeed transmission includes multiple gear paths having alternating speed ratios and a plurality of shift members. Each shift member is selectively moveable to engage a speed ratio of the transmission. The method includes directing a shift finger to contact a first shift member, moving the first shift member generally in a first generally orthogonal direction to engage a first gear, and moving the shift finger in a second generally orthogonal direction to an intermediate configuration. The shift finger will not contact a selector rail when moved in the first direction when the shift finger is in the intermediate configuration. The method also includes moving the shift finger generally in the second generally orthogonal direction to a second engaged configuration. The shift finger will contact a second shift member when moved in the first direction when the shift finger is in the second engaged configuration.
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Citations
18 Claims
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1. A shift apparatus for a multispeed transmission, wherein the multispeed transmission includes multiple gear groups having alternating speed ratios, the apparatus comprising:
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a first shift member connected to a first shift shaft; a second shift member connected to a second shift shaft, wherein the first shift member and the second shift member are selectively moveable for engaging a speed ratio of the transmission; and a single shift finger for engaging at least a portion of one of the shift members, wherein the shift finger is moveable generally in a first generally orthogonal direction to engage the first shift member when in a first engaged configuration, the shift finger is moveable generally in the first generally orthogonal direction to engage the second shift member when in a second engaged configuration, the shift finger, when in an intermediate configuration, is moveable generally in the first generally orthogonal direction such that the shift finger cannot contact one of the shift members, and wherein the shift finger is selectively moveable generally in a second generally orthogonal direction between the first engaged configuration, the intermediate configuration, and the second engaged configuration, wherein the single shift finger, when engaged with the second shift member, is configured to move the second shift shaft in opposite axial directions to engage a target gear. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for shifting a multispeed transmission of a vehicle, wherein the multispeed transmission includes multiple gear groups having alternating speed ratios, the method comprising:
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directing a single shift finger to contact a distal surface and a proximal surface of a first shift member; moving the first shift member generally in a first generally orthogonal direction to engage a first gear ratio; moving the shift finger in a second generally orthogonal direction to an intermediate configuration, wherein the shift finger will not contact a shift member when moved generally in the first generally orthogonal direction when the shift finger is in the intermediate configuration; moving the shift finger generally in the first generally orthogonal direction while the shift finger is in the intermediate configuration; and moving the shift finger generally in the second generally orthogonal direction to an engaged configuration, wherein the shift finger will contact a selector rail when moved generally in the first generally orthogonal direction when the shift finger is in the engaged configuration. - View Dependent Claims (10, 11, 12, 13)
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14. A method for shifting a multispeed transmission, wherein the multispeed transmission includes multiple gear groups having alternating speed ratios and a plurality of shift members, wherein each shift member is selectively moveable to engage a speed ratio of the transmission, the method comprising:
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directing a single shift finger to contact a distal surface and a proximal surface of a first shift member, thereafter; moving the first shift member generally in a first generally orthogonal direction to engage a first gear, thereafter; moving the shift finger in a second generally orthogonal direction to an intermediate configuration, wherein the shift finger will not contact a shift member when moved generally in the first direction when the shift finger is in the intermediate configuration, thereafter; moving the shift finger generally in the second generally orthogonal direction to a second engaged configuration, wherein the shift finger will contact a second shift member when moved generally in the first direction when the shift finger is generally in the second engaged configuration. - View Dependent Claims (15, 16, 17)
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18. A shift apparatus for a multispeed transmission, wherein the multispeed transmission includes multiple gear groups having alternating speed ratios, the apparatus comprising:
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a first shift member; a second shift member, wherein the first shift member and the second shift member are selectively moveable for engaging a speed ratio of the transmission; and a shift finger for engaging at least a portion of one of the shift members, wherein the shift finger is moveable generally in a first generally orthogonal direction to engage the first shift member when in a first engaged configuration, the shift finger is moveable generally in the first generally orthogonal direction to engage the second shift member when in a second engaged configuration, the shift finger, when in an intermediate configuration, is moveable generally in the first generally orthogonal direction such that the shift finger cannot contact one of the shift members, and wherein the shift finger is selectively moveable generally in a second generally orthogonal direction between the first engaged configuration, the intermediate configuration, and the second engaged configuration, wherein the first shift member is moveable generally in the first generally orthogonal direction between a first shift member distal gear engagement and a first shift member proximal gear engagement to define a shift distance, and wherein the shift finger is moveable generally in the first generally orthogonal direction at least the length of the shift distance without contacting a shift member.
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Specification