What Is Single Plate Clutch? – Types, Working, Parts, Diagram

Learn about the different components and types of Single Plate Clutch and how it works. The Single Plate Clutch primarily consists of two members, one mounted on the driving shaft and the other on the driven shaft.

What Is Single Plate Clutch?

What Is Single Plate Clutch
What Is Single Plate Clutch?

A single plate clutch has one clutch plate. This clutch works on the principle of friction. It is the most common type of clutch used in motor vehicles. The clutch primarily consists of two members, one mounted on the driving shaft and the other on the driven shaft.

These two shafts are parallel and concentric with each other; one shaft is fixed to its housing while the other is splined so that it can move axially. The driving torque can increase by increasing the effective radius of contact.

Single Plate Clutch Video

Construction Of Single Plate Clutch

A single-plate clutch consists of different parts for proper working. They are arranged in a systematic order.

Mainly it consists of a clutch plate with both side friction lining and some other parts which help in the proper functioning of a clutch like a flywheel, pressure plate, thrust bearing, hub, springs, and input mechanism for engagement and disengagement of the clutch.

The clutch plate attaches to the hub between the flywheel and the pressure plate, it moves axially on the driven shaft.

In a single plate clutch, the clutch plate should have both side friction lining because it mounts between the pressure plate and flywheel, friction is responsible for the torque transmission.

The pressure plate engages with the flywheel and springs. The pressure plate helps to push the clutch plate with the flywheel.

A lever attaches to thrust bearings with some mechanism on the driven shaft which transmits input and output motion from the clutch pedal.

Parts Of Single Plate Clutch

Single Plate Clutch
Single Plate Clutch

1. Flywheel – The flyWheel is an integral part of the engine, which also use as a part of the clutch. It is a driving member and connects to the pressure plate of the clutch shaft is houses with bearings in a flywheel. The flywheel rotates as the engine crankshaft rotates.

2. Pilot Bearing – The pilot bearing or bushing press into the end of the crankshaft to support the end of the transmission input shaft. The pilot bearing prevents the transmission shaft and clutch disc from wobbling up and down when the clutch releases.

3. Clutch Plate or Disc plate – It is the driven member of the single-plate clutch and line with friction material on both surfaces. It has a central hub with internal splines to limit the axial travel along the splined gearbox driving shaft. This helps to provide damping actions against torsional vibrations or variations of the driving torque between engine and transmission.

A clutch disc is a plate between the flywheel and the friction or pressure plate. It has a series of facings inverters on each side to enlarge the friction. These clutch facings are made of asbestos material. They are highly worn and heat resistant.

4. Pressure plate – The main function of the pressure plate is to establish even contact with the driven plate facing through which the pressure springs can exert a sufficient force to transmit the full torque of the engine.

5. Clutch Cover – The clutch cover assembly bolts to the flywheel. It consists of a pressure plate, release lever mechanism, clutch cover, and pressure springs. Generally, the clutch plate revolves with the flywheel. However, when the clutch has disengaged, the flywheel, as well as the pressure plates, are free to rotate independently from the driven plate and driving shaft.

6. Release levers – These pivots on pins to the clutch cover, their outer ends locate and positions on pressure plate legs, and the inner ends are projecting towards the clutch shaft. A careful and accurate adjustment of the release mechanism is one of the most important factors governing the performance of a clutch assembly.

7. Clutch shaft – It is a component of the gearbox. Since it is a splined shaft to the hub of the clutch plate, which is sliding on it. One end of the clutch shaft attaches to the crankshaft or flywheel and the other end connects to the gearbox or forms a part of the gearbox.

Types Of Single Plate Clutch

1. Diaphragm Spring Type Single Plate Clutch

1. Diaphragm Spring Type Single Plate Clutch
Diaphragm Spring Type Single Plate Clutch

A diaphragm spring type single plate clutch is a type of clutch that uses a diaphragm spring to provide pressure on the clutch plate, which is responsible for transmitting power from the engine to the transmission.

The diaphragm spring is designed to compress and release as the pedal is depressed and released, which allows the driver to smoothly engage and disengage the clutch.

2. Helical Spring Single Plate Clutch

2. Helical Spring Single Plate Clutch
Helical Spring Single Plate Clutch

A helical spring single plate clutch is a type of clutch that uses a helical spring to provide pressure on the clutch plate, which is responsible for transmitting power from the engine to the transmission.

The helical spring is designed to compress and release as the pedal is depressed and released, which allows the driver to smoothly engage and disengage the clutch. Helical spring clutches are known for its smoothness and less noise compared to diaphragm spring type clutches.

3. Single Plate Clutch With Dual Mass Flywheel

3. Single Plate Clutch With Dual Mass Flywheel
Single Plate Clutch With Dual Mass Flywheel

A single plate clutch with a dual mass flywheel is a type of clutch that uses a single clutch plate to transmit power from the engine to the transmission, as well as a dual mass flywheel to reduce vibrations and noise.

The dual mass flywheel is essentially two flywheels connected by a series of springs or dampers. This design allows for some movement between the two flywheels, which helps to absorb vibrations and reduce noise.

The clutch plate is still responsible for engaging and disengaging the engine and transmission, and the dual mass flywheel helps to smooth out the power delivery. This type of clutch is commonly used in vehicles with diesel engines, or where a smoother and quieter transmission is desired.

Working Of Single Plate Clutch

In the Clutch the three parts needed, are the engine flywheel, a friction disc or a clutch plate, and a pressure plate.

Some springs give axial force to stay the clutch in the engaged position. When the engine is running and therefore the flywheel is rotating, the pressure plate also rotates because the pressure plate attaches to the flywheel. The friction disc is located between the flywheel and the pressure plate.

When the driving force has been pushed down the clutch is released. This action forces the pressure plate to move away from the friction disc against the force of pressure springs. With this movement of the pressure plate, the friction plate is released, and therefore the clutch disengaged.

When your foot is off the pedal, the springs push the pressure plate against the clutch disc, which successively presses against the flywheel. This locks up the engine to the transmission input shaft, causing them to spin at the same speed.

The quantity of force the clutch can hold depends on the friction between the clutch plate and the flywheel, and in this way, much force the spring puts on the pressure plate.

When the clutch presses, the piston pushes on the release fork, which presses the throw-out bearing against the center of the diaphragm spring. As the middle of the diaphragm spring pushes in, a series of pins near the outside surface of the spring causes the spring to pull the pressure plate away from the clutch plate. This releases the clutch from the spinning engine.

⭐ Read More Articles What Is Multi Plate Clutch?

Advantages Of Single Plate Clutch

  1. The working of engagement and disengagement is very smooth in a single plate clutch.
  2. Power losses are very less.
  3. As sufficient surface area is available for heat dissipation in such clutches, no cooling oil is required. Therefore, single plate clutches are dry type.
  4. Single plate clutches have a quick operation and respond fast.
  5. It makes it easier to change gears than a cone type.

⭐ Read More Articles What Is Cone Clutch?

Disadvantages Of Single Plate Clutch

  1. Single plate clutches have high wear and tear rate.
  2. It has less torque transmitting capacity.
  3. The springs have to be the more stiff hence greater force requires to disengage.
  4. It requires high maintenance.
  5. The space required to accommodate the clutch is more as compared to the multi-plate clutch.

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Application Of Single Plate Clutch

  • Single-plate clutches are typically used in vehicles with manual transmissions.
  • They are simple, reliable, and easy to maintain.
  • They are cost-effective compared to other types of clutches.
  • They are lightweight and compact, making them ideal for use in smaller vehicles.
  • They are commonly found in cars, motorcycles, and other small vehicles.
  • Single plate clutch with the dual mass flywheel is commonly used in vehicles with diesel engines or where a smoother and quieter transmission is desired.

⭐ Read More Articles What Is Semi Centrifugal Clutch?

Difference Between Single Plate Clutch And Multi Plate Clutch

Single plate clutchMulti plate clutch
A single plate clutch has one clutch plateThe multi plate clutch consists of more than one clutch plate
Torque transmitting capacity is lessHigh torque transmitting capacity
Single plate clutch is bigger than the multi plate clutchMulti plate clutch is smaller than the single plate clutch
Heat generation is lessHeat generation is more
It does not ensure smooth engagementIt ensures a smooth and gradual engagement
There is no need for a cooling mediumIt needs a cooling medium
It is also called Dry ClutchesIt is also called Wet Clutches
The coefficient of friction is highThe coefficient of friction is low
Frictional power loss is lessFrictional power loss is more
Single Plate Clutch requires more spaceMulti Plate Clutch requires less space
Single-plate clutches are used in cars, buses and trucksMulti plate clutches are used in Motorcycles, Scooters

FAQ

What Is Single Plate Clutch?

A Single Plate Clutch has one clutch plate. This clutch works on the principle of friction. It is the most common type of clutch used in motor vehicles. The clutch primarily consists of two members, one mounted on the driving shaft and the other on the driven shaft.

Where is single plate clutch used?

Single plate clutches are used where large radial space is available. e.g. cars, buses, and trucks.

Single plate clutch used in which vehicle?

Single plate clutches are used in cars, buses and trucks because of the larger size of the engines of these vehicles. Hence, enough space is available to fit a single plate clutch to create maximum power transmission.

Why are single plate clutches called dry clutches?

In the single plate clutch the heat generation is less, so there is no need for a cooling medium. So, a single plate clutch is also called “dry clutches.”

What is the parts of single plate clutch?

1. Flywheel
2. Pilot Bearing
3. Clutch plate or Disc plate
4. Pressure plate
5. Clutch cover
6. Release levers
7. Clutch shaft

What is the formula of Single Plate Clutch?

( T = 2 µ W R )
T – Total torque transmitted by single plate clutch
µ – coefficient of friction
W – Total axial load or force
R – Effective mean radius

( R = r+ ri / 2 )
ro – outer diameter of the clutch facing in mm-
ri – inner diameter of the clutch facing in mm

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