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Parking brake interlock for automatic lift axle

A parking brake, automatic technology, used in brakes, motor vehicles, brake safety systems, etc., can solve problems such as reduced tire life, tire wear, and fuel economy.

Active Publication Date: 2016-11-09
HENDRICKSON USA L L C
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The key advantage of the 6×4 configuration is traction, while the key disadvantage is the loss of fuel economy due to the parasitic loss of the extra gear set required to drive the second shaft
This slip causes the tires to wear over time and, with increased torque applied to the 6x2 configuration, will significantly reduce the tire life experienced by the fleet

Method used

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  • Parking brake interlock for automatic lift axle
  • Parking brake interlock for automatic lift axle
  • Parking brake interlock for automatic lift axle

Examples

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Embodiment Construction

[0020] The embodiments disclosed herein are to provide a description of the present subject matter, and it should be understood that the subject matter may be embodied in various other forms and combinations not shown in detail. Accordingly, the specific embodiments and features disclosed herein are to be construed as limiting the subject matter as defined in the appended claims.

[0021] figure 1 A vehicle 10 is shown having a front axle 12 and two rear axles 14 and 16 . In a preferred embodiment, the vehicle 10 has a 6x2 configuration in which one of the rear axles and the front axle 12 are non-driven and the other rear axle is driven. Preferably, the forwardmost rear axle 14 is a non-driven axle, which is selectively movable into and out of contact with the ground, and the rearmost rear axle 16 is a driven axle. It is also within the scope of the invention that the forwardmost rear axle 14 be a drive axle and that the rearmost rear axle 16 be a non-driven support axle.

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Abstract

An automatic air suspension control system is provided for use in combination with a vehicle having a liftable non-driven rear axle, a driven rear axle, a parking brake, and an air suspension associated with the rear axles to apply a load to the rear axles. The air suspension control system is programmed to determine whether the rear axles are subject to a load condition under which the non-driven rear axle is to be moved between lifted and deployed conditions. If the rear axles are subject to a load condition under which the non-driven rear axle is to be moved, the air suspension control system also determines whether the parking brake is engaged. If the parking brake is disengaged, then the air suspension control system causes the non-driven rear axle to be moved; otherwise, if the parking brake is engaged, then the non-driven rear axle is prevented from moving.

Description

[0001] related application [0002] This application claims the benefit of and priority to US Provisional Patent Application Serial No. 61 / 947,561 filed March 4, 2014, the contents of which are hereby incorporated by reference. technical field [0003] The present invention generally relates to vehicle air suspensions. More specifically, the present invention relates to a control system for an air suspension of a 6x2 vehicle. Background technique [0004] In North America, most semi-tractor-trailer combinations with a hitch rear axle operate in a so-called 6x4 configuration. This term indicates that there are six separate wheel positions on the tractor vehicle (ie, two on the front axle and two on each of the two rear axles), and that four of these wheel positions are driven to provide vehicle propulsion. Generally, this is intended to mean that the four rear wheel positions are driven and the two front axle vehicle positions are not driven and the primary purpose is to st...

Claims

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Application Information

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IPC IPC(8): B60G17/015B60T17/18B62D61/12B62D61/10
CPCB60G17/0155B60G17/0195B60G2400/60B60G2800/91B60T17/18B62D61/10B62D61/12B60G2204/47B60T13/662
Inventor S·林赛
Owner HENDRICKSON USA L L C
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