The document discusses the Automatic Differential Unit Locking System (ADLS), which enhances vehicle performance by automatically locking and unlocking differential gears based on wheel speed and traction. It outlines the historical evolution from mechanical locking differentials to modern electronic systems, comparing their advantages and disadvantages. Ultimately, ADLS offers improved traction, stability, and driver control, but comes with increased complexity and cost compared to older systems.

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Design of automatic
differential unit locking system
Submitted by : Devasurya U S
Roll no. . : . 25
Reg. no. . : 2201020149
Department. . : S5 Mechanical Engineering
College : GPTC Ezhukone,Kollam
Guide: Arun Gopinath

2. CONTENTS
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List of contents
• Introduction
• Parts of automatic differential unit locking system
(ADLS)
• Historical evolution to ADLS
• Comparison between ADLS with older differential
locking system (DLS)
• Conclusion
• Reference

3. BUSNESS PROFILE
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Introduction
• Definition
ADLS is a technology that
automatically locks and unlocks the
differential gears.

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Contact
wheel
Non contact
wheel

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• Importance for a differential
locking system
1. Enhancing vehicle performance
2. Control and improved traction
3. Efficiency in various conditions, from
off-road adventures to everyday
commutes

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• Key benefits of ADLS
1. Increased driver confidence and driving
smoothness
2. Stability
3. Improved traction
4. Leading enhanced safely

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Automatic differential locking
system (ADLS) assembly

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Parts of ADLS
• Differential gears
Transfers power between the wheels while
allowing them to rotate at different speeds.

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• Electronically controlled actuator
Engages and disengages the locking
mechanism, controlled by sensors and
software.
• Sensors
Monitor wheel speed,traction and
vehicle dynamics to determine when to
lock or unlock the differential.

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• Electronic control unit (ECU)
Processes sensor data and controls the
actuator to optimize power delivery.
• Locking mechanism
Connects or disconnects
the differential gears to lock or unlock the unit.

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• Hydraulic or pneumatic system
Provides the necessary force to engage or
disengage the locking mechanism
• Wheel speed sensors
Monitor individual wheel speeds to detect
slippage or loss of traction

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• Traction control module
Coordinates with the ECU to optimize
power delivery and stability.
• Driver interface
Displays system status and allows driver
input(if applicable).

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Historical evolution to
ADLS S
• Mechanical locking
differentials (1950-1970s)
1. Early locking differentials
were purely mechanical,
using a manual lever or
pedal to engage and
disengage the lock

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2. The mechanical locking differential (1950s-
1970s) was used in various vehicles, including:
- Jeep Willys
- Kubota B6200
Foot pedal controller
of Kubota B6200

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JEEP WILLYS
1950

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• Limited-Slip Differentials (1960s-1980s)
1. Limited-slip differentials emerged, using
viscous fluids or clutch packs to transfer
power between wheels.
2.Limited-Slip Differentials (1960s-1980s)
were used in various vehicles, including:
- Ford Mustang (1964-1973)
- Chevrolet Camaro (1967-1969)

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1969 Chevrolet Camaro
1965 Ford Mustang

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Limited-Slip Differential assembly

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At last automatic locking differentials
emerged, using sensors and electronic
controls to engage and disengage the lock.
Vehicles that used Automatic Locking Differentials
- Wrangler (1997-2006)
- Grand Cherokee (1993-2004)
- Liberty (2002-2007)
- 4Runner (1996-2002)
- Land Cruiser (1998-2007)

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1997 Jeep Wrangler 2022 Jeep Grand
Cherokee

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Comparison between ADLS with older DLSs
ADLS
Pros:
1. *Improved traction*: Automatically engages and
disengages, optimizing power transfer.
2. *Enhanced stability*: Reduces wheelspin and loss
of control.
3. *Increased driver control*: Allows for smooth,
seamless power delivery.

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Cons:
1. *Complexity*: More complex system with
electronic controls and sensors.
2. *Cost*: Generally more expensive than
older systems.
3. *Reliability*: Dependent on electronic
components and sensor accuracy.

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Older Differential Unit Locking Systems
(Mechanical and Limited-Slip):
Pros:
1. *Simplicity*: Mechanical systems are less
complex and easier to maintain.
2. *Cost-effective*: Generally less expensive
than automatic systems.
3. *Reliability*: Fewer electronic components
reduce reliability concerns.

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Cons:
1. *Driver intervention*: Require manual
engagement and disengagement.
2. *Reduced traction*: Can lead to wheelspin
and loss of control if not engaged properly.
3. *Less stability*: May not perform as well in
changing conditions.

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Conclusio
n
Automatic Differential Unit Locking System
(ADLS) is a cutting-edge technology that
revolutionizes the way vehicles handle
challenging terrain and driving conditions.
By automatically locking and unlocking the
differential unit

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Referenc
e
• Research journal of international Research
journal of modernization in Engineering
technology and science
• Research paper of Alfred Sigl
• WWW.wikipedia.com
• WhatsApp Meta

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Doubts??

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Thanks