The forward and rear side gears are in meshing engagement with a plurality of interaxle differential pinion gears that are supported on a spider. In vehicles without a differential, such as karts, both driving wheels are forced to rotate at the same speed, usually on a common axle driven by a simple chaindrive mechanism. Refer to the vehicle owners manual for dcdl operating instructions. An excellent tutorial from the 1930s on the principles and development of the differential gear. The purpose of the dcdl in a meritor axle is to provide maximum vehicle traction and control on unfavorable road or highway surfaces. Us20080085803a1 automated interaxle differential lock.
My question is addressed only to veteran truck drivers. The inter axle differential lockout increases traction effort under adverse road conditions. Its installed between the input shaft of the front axle and output shaft to the rear axle. A sensor on the interaxle differential identifies when an axle loses traction and automatically engages the idl function while the vehicle is still moving. Identify the parts of the rear drive axle and front drive axle. Inter axle differential lockout see spicer driver instruction axdr0126. The right switch, with the x on each axle differential, is the differential lock. An inter axle differential iad is a differential mounted in the carrier of the front axle of a tandem axle set. Inspect, adjust, repair, or replace airoperated power divider inter axle differential lockout assembly including diaphragms, seals, springs, yokes, pins, lines, hoses, fittings, and controls. Operation of driver controlled differential locks dcdl axletech.
Pdf in todays scenario, rear axle with differential lock arrangement is one of the key required parameter for military vehicles. Torsen is used in audi cars as an interaxle differential 3, as well as in. Inspect power divider interaxle differential assembly. Drive axle wheel differential lock the driver must know the purpose as well as the proper use of these important design features. When the dcdl is actuated, a clutch collar completely locks the differential case, gearing, and axle shafts together. World american 2608 ds381,401,402 inter axle differential. The operator does not have to think about when and where to engage either the inter or crossaxle differential lock. In the power divider torque is transferred equally to the pinion shaft of the front differential and the thru shaft, inter axle drive shaft and then the pinion shaft of the rear differential. Tp models with straight drive through shaft and no interaxle differential.
Rearwheeldrive vehicles have three separate powertrain members. The interaxle differential assembly provides speed differentiation between driving input to a forward differential gear assembly for the forward drive axle and driving input to a rear differential gear assembly for the rear drive axle as needed. The interwheel differential lock is just that, a drivercontrolled means of locking the front and rear differentials the left and right side wheel ends are locked together and both pulling. What does a differential do and how does the differential lock work on big trucks. Inspect power divider inter axle differential assembly. Dec 18, 2017 when the differential is locked on detroit rear axles, both wheels will always turn at the same speed which greatly improves forward traction in situations such as snow and ice. Sensors monitor the machine and wheel speeds, enabling instant response in low traction conditions. Automation and synchronization of traction assistance. An interaxle differential apparatus of the present invention is an interaxle differential apparatus including an interaxle differential for distributing torque to front and rear driving wheels at a predetermined ratio, an interaxle differential lock for locking the interaxle differential, and. An interaxle differential assembly includes a forward side gear and a rear side gear that are supported by an input shaft. Using the interaxle differential lock dot csa insights. The meritor interaxle differential iad is a drivercontrolled.
The power divider is a separate differential box located between the already existing two differential boxes at the rear end of the truck. Understand the adjustment of the ring and pinion gears. Tp models with straight drive through shaft and no inter axle differential. Xl 3100 v xl 3100 v highway speed wheeled excavator hydraulic excavator xl 3100 v specifications engine volvo tad572ve tier 4f 5. Recognize fourwheel drive systems and the need for an inter axle differential appraise electronic control of torque through braking and clutching devices evaluate the total drivetrain package as a system. In this article, youll learn why your car needs a differential, how it works and what its shortcomings are. Interaxle differential lock ministry of transportation. The method involves determining the speed of the vehicle, determining pulses per minute from each inter axle differential sensor via the vehicle electronic control unit ecu, where each of the inter axle differential. The interaxle differential lock is used on vehicles with tandem rear axles. Identify the gross vehicle and axle weight ratings a. Pdf validation of rear axle with differential lock for offroad. The power distribution unit includes an inter axle differential capable being placed in a locked condition by the clutching device and of accommodating a rotational difference between a first output gear and a second output gear with the inter axle differential. When the differential is locked on detroit rear axles, both wheels will always turn at the same speed which greatly improves forward traction in situations such as snow and ice. D dual drive forward axle with interaxle differential r dual drive rear axle options d wheel differential lock forward unit only h heavy wall housing p lube pump s selecttrack x without interaxle gear type 1 standard single reduction design level head assembly series gaw rating x lbs.
Dp models with inter axle differential and pressure lube pump. The driver controlled power divider lockout is an interaxle lock. Tandem axle, without drivercontrolled main differential lock dcdl, with interaxle differential iad exploded views. A locking differential is designed to overcome the chief limitation of a standard open differential by essentially locking both wheels on an axle together as if on a common shaft. Interactive pdf functions may not work correctly unless viewed using the free adobe acrobat reader. For such an iad lockout mechanism to function properly, the.
The present invention relates to an automatic inter axle differential sensor configuration i. The interaxle differential lock can be engaged while in motion as when approaching a slippery hill as long as. Posted june 20, 2017 by administrator in transportation 0 comments. Differential lock is controlled by a lever or pushpull control valve on the instrument panel. Vehicles with the 4wd system of different construction and functional.
Understand basic service and repair of a differential. The present invention relates to an automatic interaxle differential sensor configuration and calibration method, for a vehicle having a tandem drive axle, that comprises determining pulses or pulses per minute from each interaxle differential sensor by way of the vehicle electronic control unit ecu, where each interaxle differential. Let up momentarily on the accelerator to allow the shift, differential lock then resume driving at normal speed. Locking differentials interaxle differential lock automatic. Identify the major parts of a rear drive axle assembly. Recognize fourwheel drive systems and the need for an interaxle differential. Control method of interaxle differential and interaxle. The operator does not have to think about when and where to engage either diff lock. These design changes add strength and shock load capacity to differential components. Transfer case interaxle differential delivers equal torque to each axle when traction is favorable. In addition the bell b25e adt has limited slip differentials in each axle so the cross locking of wheels is achieved automatically without any interaction from the operator.
The present invention relates to an automatic interaxle differential sensor. You may have heard terms like rear axle ratio or final drive ratio. Stabilizer bar to axle housing side bracket differential carrier to rear axle housing brake tube flare nut propeller shaft attaching nut bearing case to rear axle housing rear axle bearing lock nut filler plug drain plug companion flange differential case to drive gear bearing cap lock plate lubricants nm ft. This differential can be locked and unlocked by the driver in situations when there is little or no traction for the drive wheels. Periodically, the valve should be operated to make sure it moves freely. Automated interaxle differential lock sensor configuration and.
This allows the wheels of either axle to revolve faster or slower than the wheels of the other axle in order to compensate for cornering, uneven road surfaces, and slightly different tire sizes. When conditions get ugly, engage the difflock on the go to deliver torque to the tires that can best use it. In order to maintain maximum traction while rolling through the fields with 80,000 lbs of weight. How differentials and differential locks work on commercial trucks. That shaft is the input for the forward axle and also the rear axle with a differential. All configurations and common applications are illustrated here. Operation of driver controlled differential locks dcdl. Locking differentials interaxle differential lock automatic traction control locking differential a locking differential is beneficial as it allows torque to be developed in all wheels sharing an axle, regardless of their traction. Refer to your owners manual for further instructions.
Pdf axle torque distribution control for enhancing mobility. Pdf influence of traction conditions on the power balance in the. The forward and rear side gears are in meshing engagement with a plurality of inter axle differential pinion gears that are supported on a spider. The present invention relates to an automatic inter axle differential sensor configuration and calibration method, for a vehicle having a tandem drive axle, that comprises determining pulses or pulses per minute from each inter axle differential sensor by way of the vehicle electronic control unit ecu, where each inter axle differential. Differential assembly kits free delivery possible on eligible purchases.
An iad works in a similar manner to a standard axle differential. The power distribution unit includes an interaxle differential capable being placed in a locked condition by the clutching device and of accommodating a rotational difference between a first output gear and a second output gear with the interaxle differential. Interaxle differential lock switch komatsu america corp. An interaxle differential iad works in a similar manner to the main differential except it splits the torque equally between the two axles of a tandem, rather than the two wheel ends of an axle. Bias balancing interaxle differential for constant 4wheel drive jstor. An iad allows for speed differences between two axles. An inter axle differential assembly includes a forward side gear and a rear side gear that are supported by an input shaft. Application of the inter and crossaxle differential locks is onthego and fully automatic. Although differential 10 is intended primarily for use in a heavy truck having tandem drive axles, the invention lock mechanism is not limited to use in heavy trucks or in combination with interaxle differentials.
The interaxle differential lockout increases traction effort under adverse road conditions. This forces both wheels to turn in unison, regardless of the traction or lack thereof available to either wheel individually. Dp models with interaxle differential and pressure lube pump. The gear ratios in the transmission and drive axle are used to match. On trucks equipped with two full axle locking differentials, all four wheels are required to spin before traction is lost. Selection of t otal run time, cooling interval and. The inter axle differential also called a power divider is an integral shaft in the forward axle. Well also look at several types of positraction, also known as limited slip differentials. The central oscillation joint, high suspension travel on all axles, and balanced weight distribution provide. Recognize fourwheel drive systems and the need for an inter axle differential. Interaxle differential lock tandem axle trucks the interaxle differential provides for necessary differential action between the axles of a tandem drive unit.
Drive axles differential locks to unlock the interaxle differential, move the lockout control valve to unlock while maintaining vehicle tandem drive axles with interaxle speed, after leaving the poor road conditions. The interaxle differential is not meant for use on dry pavement. Ase 3 manual drivetrain and axles module 6 rear axles 68 rear wheel driveline features student workbook the rear axle is part of the powertrain of a rearwheeldrive vehicle. Transfer case inter axle differential delivers equal torque to each axle when traction is favorable. The interaxle differential lock or power divider is for use in lowtraction situations only. Note that the input pinion is a smaller gear than the ring gear. Jun 05, 2011 on trucks equipped with two full axle locking differentials, all four wheels are required to spin before traction is lost. The drive wheels will act like they are rotating on a common shaft. Differentials and drive axles study notes purposes of a drive axle assembly to transmit power from the drive shaft to the wheels to turn the power flow 90degrees on rwd cars to allow the wheels to turn at different speeds while cornering rwd live axle components rear axle housing. Identify and explain the function operation of command zone screen a. The functions of this differential are best under stood by an examination of the problem. Once i get in really bad traction conditions i engage the differential lock.
Understand the procedures for removing and replacing axle bearings and. The middle switch, with the x between the axles is the power divider. I forgot to turn off my interaxle differential lock. The automotive differential is designed to drive a pair of wheels while allowing them to rotate at different speeds. On august 1, 1981, spicer converted these axles to a new configuration which includes redesign of axle diff. World american 128634 ds404 inter axle differential assembly. A locking differential is designed to overcome the chief limitation of a standard open differential by essentially locking both wheels on an axle together as if on a. Buy world american 128634 ds404 inter axle differential assembly.
A familiarization of drivetrain components sae training. Inspect, adjust, repair, or replace airoperated power divider interaxle differential lockout assembly including diaphragms, seals, springs, yokes, pins, lines, hoses, fittings, and controls. When engaged, the interaxle differential lock will supply power to the front axle. Any combination of forward and rear axles may be encountered.
Appraise electronic control of torque through braking and clutching devices. When off road or in slick conditions of any kind i engage the power divider. We have developed a unique interaxle differential to fulfill this need. The term powertrain is used to describe the parts of a vehicle which make the drive wheels move. Feb 09, 2009 an excellent tutorial from the 1930s on the principles and development of the differential gear. Axle torque distribution control for enhancing mobility of offroad vehicles 5 figure 4 vehicle in split adhesion with interaxle plus interwheel traction control 1 see online version for colours. Interaxle differential lockout see spicer driver instruction axdr0126. With the planned introduction of the automatic interaxle differential lock function, it was ap parent that the individual functions had to be. Power divider lockout vs driver inter wheel differential lock. What is the purpose of interaxle differential answers. This feature can be in only two positionslock or unlock as indicated. I am currently driving a brand new 2008 freightliner classic. Inter axle differential, buy various high quality inter axle differential products from global inter axle differential suppliers and inter axle differential. Locking differentials inter axle differential lock automatic traction control locking differential a locking differential is beneficial as it allows torque to be developed in all wheels sharing an axle, regardless of their traction.
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