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