Drive axle system having a clutching device
First Claim
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1. A method of operating a drive axle system, the method comprising the steps of:
- rotating a first shaft, the first shaft comprising at least one shaft section;
drivingly engaging a first axle assembly, the first axle assembly comprising a first wheel differential, a first driving gear coupled to the first wheel differential which the first shaft is drivingly engaged with, and a first pair of output axles drivingly engaged with the first wheel differential, wherein the first axle assembly further comprises an axle ratio selection device comprising a planetary gear set;
drivingly engaging a second axle assembly comprising a second wheel differential, a second driving gear coupled to the second wheel differential, a second pair of output axles drivingly engaged with the second wheel differential, and a first clutching device disposed on and dividing one of the second pair of output axles into first and second portions, the second driving gear drivingly engaged with one of the first shaft and the first driving gear through a second clutching device;
moving the second clutching device into a position to disengage the second driving gear from one of the first shaft and the first driving gear; and
moving the first clutching device into a position to disengage the first portion from the second portion of one of the second pair of output axles, thereby allowing the second driving gear to coast to a substantially non-moving state.
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Abstract
A method of operating a drive axle system is provided. The method comprises the steps of rotating a first shaft, drivingly engaging a first axle assembly, drivingly engaging a second axle assembly, moving a second clutching device into a position to disengage a second driving gear of the second axle assembly, and moving a first clutching device into a position to disengage a first portion from a second portion of one of a second pair of output axles, thereby allowing the second driving gear to coast to a substantially non-moving state.
75 Citations
18 Claims
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1. A method of operating a drive axle system, the method comprising the steps of:
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rotating a first shaft, the first shaft comprising at least one shaft section; drivingly engaging a first axle assembly, the first axle assembly comprising a first wheel differential, a first driving gear coupled to the first wheel differential which the first shaft is drivingly engaged with, and a first pair of output axles drivingly engaged with the first wheel differential, wherein the first axle assembly further comprises an axle ratio selection device comprising a planetary gear set; drivingly engaging a second axle assembly comprising a second wheel differential, a second driving gear coupled to the second wheel differential, a second pair of output axles drivingly engaged with the second wheel differential, and a first clutching device disposed on and dividing one of the second pair of output axles into first and second portions, the second driving gear drivingly engaged with one of the first shaft and the first driving gear through a second clutching device; moving the second clutching device into a position to disengage the second driving gear from one of the first shaft and the first driving gear; and moving the first clutching device into a position to disengage the first portion from the second portion of one of the second pair of output axles, thereby allowing the second driving gear to coast to a substantially non-moving state. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of utilizing a drive axle system, the method comprising the steps of:
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rotating a first shaft, the first shaft comprising at least one shaft section; providing a bevel gear inter-axle differential comprising a first side gear, a driving spider, and a second side gear, the driving spider drivingly engaged with the first shaft; drivingly engaging a first axle assembly, the first axle assembly comprising a first wheel differential, a first driving gear coupled to the first wheel differential which the second side gear of the bevel gear inter-axle differential is drivingly engaged with, and a first pair of output axles drivingly engaged with the first wheel differential; drivingly engaging a second axle assembly, the second axle assembly comprising a second wheel differential, a second driving gear coupled to the second wheel differential, a second pair of output axles drivingly engaged with the second wheel differential, and a first clutching device disposed on and dividing one of the second pair of output axles into first and second portions, the second driving gear drivingly engaged with one of the first shaft and the first driving gear through a second clutching device; moving the second clutching device into a position to drivingly engage the second driving gear with the first side gear of the bevel gear inter-axle; moving the first clutching device into a position to drivingly engage the first portion with the second portion of one of the second pair of output axles; applying a torque to the driving spider through the first shaft; distributing a first portion of the torque to the first driving gear through the second side gear of the bevel gear inter-axle differential; and distributing a second portion of the torque to the second driving gear through the first side gear of the bevel gear inter-axle differential. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of operating a drive axle system, the method comprising the steps of:
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rotating a first shaft, the first shaft comprising at least one shaft section; providing a planetary inter-axle differential comprising a sun gear, a carrier, and a ring gear, the carrier drivingly engaged with the first shaft; drivingly engaging a first axle assembly, the first axle assembly comprising a first wheel differential, a first driving gear coupled to the first wheel differential which the ring gear of the planetary inter-axle differential is drivingly engaged with, and a first pair of output axles drivingly engaged with the first wheel differential; drivingly engaging a second axle assembly, the second axle assembly comprising a second wheel differential, a second driving gear coupled to the second wheel differential, a second pair of output axles drivingly engaged with the second wheel differential, and a first clutching device disposed on and dividing one of the second pair of output axles into first and second portions, the second driving gear drivingly engaged with one of the first shaft and the first driving gear through a second clutching device; moving the second clutching device into a position to drivingly engage the second driving gear with the sun gear of the planetary inter-axle differential; moving the first clutching device into a position to drivingly engage the first portion with the second portion of one of the second pair of output axles; applying a torque to the carrier through the first shaft; distributing a first portion of the torque to the first driving gear through the ring gear of the planetary inter-axle differential; and distributing a second portion of the torque to the second driving gear through the sun gear of the planetary inter-axle differential. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification