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. 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. 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. A sensor on the interaxle differential identifies when an axle loses traction and automatically engages the idl function while the vehicle is still moving. Buy world american 2608 ds381, 401, 402 inter axle differential. An iad allows for speed differences between two axles.
Inspect, adjust, repair, or replace airoperated power divider interaxle differential lockout assembly including diaphragms, seals, springs, yokes, pins, lines, hoses, fittings, and controls. Pdf in todays scenario, rear axle with differential lock arrangement is one of the key required parameter for military vehicles. 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. Automated interaxle differential lock sensor configuration and.
The interaxle differential is not meant for use on dry pavement. My question is addressed only to veteran truck drivers. Identify and explain the function operation of command zone screen a. The forward and rear side gears are in meshing engagement with a plurality of interaxle differential pinion gears that are supported on a spider. Refer to your owners manual for further instructions.
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. The power divider is a separate differential box located between the already existing two differential boxes at the rear end of the truck. Interaxle differential lockout see spicer driver instruction axdr0126. For such an iad lockout mechanism to function properly, the. Tandem axle, without drivercontrolled main differential lock dcdl, with interaxle differential iad exploded views. Pdf influence of traction conditions on the power balance in the. Read your operators manual for full instructions an specifics. Differential lock is controlled by a lever or pushpull control valve on the instrument panel. You may have heard terms like rear axle ratio or final drive ratio.
When off road or in slick conditions of any kind i engage the power divider. Dp models with inter axle differential and pressure lube pump. World american 128634 ds404 inter axle differential assembly. Recognize fourwheel drive systems and the need for an interaxle differential. Tp models with straight drive through shaft and no inter axle differential. When conditions get ugly, engage the difflock on the go to deliver torque to the tires that can best use it. I forgot to turn off my interaxle differential lock.
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. The present invention relates to an automatic interaxle differential sensor. Recognize fourwheel drive systems and the need for an inter axle differential. In this article, youll learn why your car needs a differential, how it works and what its shortcomings are.
I am currently driving a brand new 2008 freightliner classic. 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. Note that the input pinion is a smaller gear than the ring gear. All configurations and common applications are illustrated here. These design changes add strength and shock load capacity to differential components. The inter axle differential lockout increases traction effort under adverse road conditions. 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. An inter axle differential iad is a differential mounted in the carrier of the front axle of a tandem axle set. Understand the adjustment of the ring and pinion gears. What does a differential do and how does the differential lock work on big trucks. How differentials and differential locks work on commercial trucks. World american 2608 ds381,401,402 inter axle differential.
Torsen is used in audi cars as an interaxle differential 3, as well as in. When the differential is locked on detroit rear axles, both wheels will always turn at the same speed which greatly improves forward traction in. 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. 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. Posted june 20, 2017 by administrator in transportation 0 comments. 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. When engaged, the interaxle differential lock will supply power to the front axle. 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. The middle switch, with the x between the axles is the power divider. Drive axle wheel differential lock the driver must know the purpose as well as the proper use of these important design features. 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. Inter axle differential lockout see spicer driver instruction axdr0126.
This forces both wheels to turn in unison, regardless of the traction or lack thereof available to either wheel individually. On august 1, 1981, spicer converted these axles to a new configuration which includes redesign of axle diff. The meritor interaxle differential iad is a drivercontrolled. Us20080085803a1 automated interaxle differential lock. Let up momentarily on the accelerator to allow the shift, differential lock then resume driving at normal speed. 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 inter axle differentials. 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. Automation and synchronization of traction assistance.
The purpose of the dcdl in a meritor axle is to provide maximum vehicle traction and control on unfavorable road or highway surfaces. On trucks equipped with two full axle locking differentials, all four wheels are required to spin before traction is lost. 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. Operation of driver controlled differential locks dcdl axletech. 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.
Car wheels spin at different speeds, especially when turning. Bias balancing interaxle differential for constant 4wheel drive jstor. Selection of t otal run time, cooling interval and. An inter axle differential assembly includes a forward side gear and a rear side gear that are supported by an input shaft. Inspect power divider interaxle differential assembly.
The driver controlled power divider lockout is an interaxle lock. An excellent tutorial from the 1930s on the principles and development of the differential gear. 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. Interaxle differential lock ministry of transportation. 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. Appraise electronic control of torque through braking and clutching devices.
This feature can be in only two positionslock or unlock as indicated. That shaft is the input for the forward axle and also the rear axle with a differential. Transfer case interaxle differential delivers equal torque to each axle when traction is favorable. The right switch, with the x on each axle differential, is the differential lock. 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. The functions of this differential are best under stood by an examination of the problem. We have developed a unique interaxle differential to fulfill this need. The operator does not have to think about when and where to engage either diff lock.
Interaxle differential lock tandem axle trucks the interaxle differential provides for necessary differential action between the axles of a tandem drive unit. Vehicles with the 4wd system of different construction and functional. The inter axle differential also called a power divider is an integral shaft in the forward axle. Jun 05, 2011 on trucks equipped with two full axle locking differentials, all four wheels are required to spin before traction is lost. The interaxle differential lock is used on vehicles with tandem rear axles. A familiarization of drivetrain components sae training. Power divider lockout vs driver inter wheel differential lock. The automotive differential is designed to drive a pair of wheels while allowing them to rotate at different speeds. An iad works in a similar manner to a standard axle differential.
The interaxle differential lock can be engaged while in motion as when approaching a slippery hill as long as. Interactive pdf functions may not work correctly unless viewed using the free adobe acrobat reader. Identify the gross vehicle and axle weight ratings a. Control method of interaxle differential and interaxle.
The interaxle differential lockout increases traction effort under adverse road conditions. Inspect power divider inter axle differential assembly. Sensors monitor the machine and wheel speeds, enabling instant response in low traction conditions. The gear ratios in the transmission and drive axle are used to match. In order to maintain maximum traction while rolling through the fields with 80,000 lbs of weight. Pdf axle torque distribution control for enhancing mobility. 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. Application of the inter and crossaxle differential locks is onthego and fully automatic. Using the interaxle differential lock dot csa insights. 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. Well also look at several types of positraction, also known as limited slip differentials. Any combination of forward and rear axles may be encountered. The drive wheels will act like they are rotating on a common shaft. Buy world american 128634 ds404 inter axle differential assembly.
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. 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. What is the purpose of interaxle differential answers. Operation of driver controlled differential locks dcdl. Interaxle differential lock switch komatsu america corp. Understand basic service and repair of a differential. Recognize fourwheel drive systems and the need for an interaxle differential appraise electronic control of torque through braking and clutching devices evaluate the total drivetrain package as a system. Locking differentials interaxle differential lock automatic. Rearwheeldrive vehicles have three separate powertrain members. Xl 3100 v xl 3100 v highway speed wheeled excavator hydraulic excavator xl 3100 v specifications engine volvo tad572ve tier 4f 5.
The present invention relates to an automatic inter axle differential sensor configuration i. Identify the major parts of a rear drive axle assembly. Once i get in really bad traction conditions i engage the differential lock. Transfer case inter axle differential delivers equal torque to each axle when traction is favorable. Its installed between the input shaft of the front axle and output shaft to the rear axle. Understand the procedures for removing and replacing axle bearings and. Dp models with interaxle differential and pressure lube pump. 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. Chapter 11 drive lines, differentials, drive axles, and power. 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. With the planned introduction of the automatic interaxle differential lock function, it was ap parent that the individual functions had to be. An interaxle differential assembly includes a forward side gear and a rear side gear that are supported by an input shaft. The term powertrain is used to describe the parts of a vehicle which make the drive wheels move.
Identify the parts of the rear drive axle and front drive axle. Feb 09, 2009 an excellent tutorial from the 1930s on the principles and development of the differential gear. Pdf validation of rear axle with differential lock for offroad. The operator does not have to think about when and where to engage either the inter or crossaxle differential lock. The central oscillation joint, high suspension travel on all axles, and balanced weight distribution provide. When the dcdl is actuated, a clutch collar completely locks the differential case, gearing, and axle shafts together. Inter axle differential, buy various high quality inter axle differential products from global inter axle differential suppliers and inter axle differential. This differential can be locked and unlocked by the driver in situations when there is little or no traction for the drive wheels.
Differential assembly kits free delivery possible on eligible purchases. Refer to the vehicle owners manual for dcdl operating instructions. Periodically, the valve should be operated to make sure it moves freely. 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.