Hydraulic Clutch: Definition, Components, Working Principle, Advantages, Disadvantages, and Applications [PDF]

Saswata Baksi
Reading Time: 5 minutes

Hello readers, welcome to another chapter of Clutch. Today in this paper we will study the overview of a Hydraulic Clutch, and see parts, principles, advantages, disadvantages, and the most important part, applications of hydraulic clutches.

Definition of a Hydraulic Clutch:

The hydraulic clutch is the important category of a multi-plate clutch. It is mainly used in vehicles to disengage or engage the clutch plate from the engine. Apart from that, it can also be used as the alternative of the traditional mechanical clutch.

Usually, the hydraulic clutch is used to disengage or engage the clutch by forcing the hydraulic fluid to the disengagement clutch parts. In regards to this, the Hydraulic fluid needs to be highly pressurized.

Otherwise, it cannot push the clutch system forcefully. Therefore, the clutch does not disengage. Apart from that, this clutch has auto maintenance techniques.

Therefore, there is no need for manual maintenance system. This hydraulic clutch has some smaller parts as compared to the other clutches. It may be wrong sometimes, but for that, no maintenance is required.

It can maintain itself automatically. Such maintenance needed for the hydraulic fluid to check in the clutch reservoir as the fluid may be impure. Hence, the hydraulic fluid is needed to be replaced.

parts of hydraulic clutch
FOR REUSE ATTRIBUTION NEEDED

Components of a Hydraulic clutch

The Hydraulic clutch is made of different types of components. They are as follows:

1. Clutch Pedal:

Most primary part that engages the clutch in vehicles is the Clutch Pedal. A driver has to press the clutch pedal to start the engagement process. At first, after pressing the clutch pedal, the clutch plate starts its rotation.

2. Diaphragm Clutch:

Diaphragm Clutch is usually an independent clutch, but in Hydraulic Clutch the Diaphragm Clutch can be used. The diaphragm Clutch is attached to the clutch pedal.

When the clutch pedal is pressed by the driver then at first, the clutch pedal pushes the Diaphragm Clutch then the other diaphragm Clutch presses the flywheel to do further processes.

3. Clutch Plate:

One of the most important parts of the Hydraulic clutch is the Clutch Plate. The clutch plate is made of thin metal plates. There is a friction lining present, which is attached to the clutch plate, on both sides.

Apart from that, this clutch plate is usually placed among the pressure plate and the flywheel. The friction lining of the thinner surface of the clutch plate makes its contact to the flywheel and the friction lining of the outer surface of the clutch plate and that makes contact to the pressure plate and makes the friction.

4. Friction Surface:

Friction surfaces are attached to the clutch plate on both sides. When the clutch plate starts its rotation then the friction surface makes contact to the pressure plate and also to the flywheel. Therefore, the friction force is generated. This friction force makes the high torque.

5. Pressure Plate:

Another useful part of the Hydraulic clutch is the Pressure plate. The pressure plate is placed on one side of the clutch plate. The pressure plate is attached with springs with the help of the bolts and along with the clutch pedals.

The friction surfaces of the clutch plate make contact with the pressure plate. The pressure plate’s function mainly depends on weight. When weight is given to the pressure plate then it makes contact with the friction surface of the clutch plate and produces the friction.

6. Flywheel:

Another useful part of the Hydraulic clutch is Flywheel. The flywheel has placed on another side of the clutch plate. The flywheel is attached to the transmission shift. The friction surfaces of the clutch plate make contact with the flywheel. So, friction is produced.

7. Diaphragm Spring:

Diaphragm Spring is attached to the pressure plate. These springs mainly work, with the help of the pressure plate. This pressure is produced from the high weight, that is given to the pressure plate. Along with that, thrust spring makes contact with the friction surface of the clutch plate and produce high friction.

8. Splined Sleeves:

Splined sleeves are mainly used to make engagement and disengagement in the multi-plate clutch system or mainly in the Hydraulic clutch system. These Splined sleeves are placed between the friction lining of the clutch plate and the pressure plate.

When pressure plate gives pressure then the splined sleeves used to go forward to make the clutch engaged and when the pressure plate releases the pressure then the splined sleeves used to go back to make the clutch disengaged.

mechanism of hydraulic clutch
FOR REUSE ATTRIBUTION NEEDED

Working Principle of a Hydraulic Clutch:

The working procedure of the Hydraulic Clutch is usually divided into two parts. One is Engagement and another one is Disengagement. The following section discusses the same concisely;

Engagement:

  • At first, the Clutch pedal has to be pressed by the driver of a vehicle to start the engagement process.
  • When the clutch pedal is pressed then it starts the working process of the diaphragm Clutch.
  • The clutch pedal is attached to the clutch plate. Therefore, the clutch plate starts its rotation.
  • The friction surfaces of the clutch plate can be used to make contact with the pressure plate and also flywheel.
  • The pressure plate gives pressure to the spring and spring makes contact with the splined sleeves.
  • Then the attachment of pressure plate, splined sleeves, friction surfaces, clutch plate, and the flywheel is made and the engagement is done in this way.

Disengagement:

  • At first, the Clutch pedal has to be released by the driver of a vehicle to start the disengagement process.
  • The splined sleeves come backward and release the contact of the pressure plate and the clutch plate.
  • Then the flywheel also released from the contact of the clutch plate.
  • The rotation of the clutch plate becomes slow down and at last stops.
  • Then the disengagement process is done in this way.

Advantages of a Hydraulic Clutch:

There are many advantages of the hydraulic clutch. Some of the advantages are stated below:

  • The hydraulic clutch is self-lubricated so the hydraulic clutch needs no maintenance for lubricating the clutch.
  • In the case of a hydraulic clutch, the height of the pedal is adjusted automatically.
  • In comparison to the other clutch systems, the hydraulic clutch can give an easier feeling during pushing the clutch.
  • There are many variations present of the hydraulic clutch so this clutch can be fitted at any place.
  • Due to corrosion the, inner wires that used in the mechanical clutch may bend so mockingly the wires can get stuck. This incident can lead the damage to the clutch.  But in the case of the hydraulic clutch, this type of damage is not possible. Because a replacement of a particular fluid in the hydraulic clutch is enough to prevent the above type of damage.
  • Loosing of the cable after some time affects the disengagement process that may damage the clutch completely.  But in the case of the hydraulic clutch, there is no cable required so this clutch is safe from damage caused by loosening the cable.
  • So, using a hydraulic clutch instead of other clutch is safer and more reliable.
  • It is better to use the hydraulic clutch because of quality.  The quality of this hydraulic clutch is better than the mechanical clutch.

Disadvantages of a Hydraulic Clutch:

There are many disadvantages of the hydraulic clutch also present. Some of the disadvantages of the hydraulic clutch are stated below:

  • The hydraulic clutch consists of some mechanisms such as the slave cylinder and cylinder are the two mechanisms of this clutch. So, there is a chance of outflow of fluid that can be used in the hydraulic clutch. This outflowing happens from the cylinder as well as from the slave cylinder due to the damage that results in the leakages. For repairing this damage, users have to spend extra money.
  • This hydraulic clutch consists of plastic of metallic piping systems. This pipe is breakable or can be teared down. So, time to time checking is necessary. This is more expensive to maintain damage prevention.
  • For proper functioning, standard and correct fluid is required otherwise seals may be damaged. So, maintaining the standard for proper fluid can be a little more expensive.
  • Time to time checking the level of fluid of the hydraulic clutch is compulsory for users.
  • The price of the hydraulic clutch is more expensive than the mechanical clutch. This is one of the most crucial disadvantages of this clutch.

Application or Use of the Hydraulic Clutch:

Most of the reputed car manufacturers are opting for the hydraulic clutch for their products for quality and simplicity in applications. Nowadays the use of the hydraulic clutch is highly observed in trucks and automotive industries also. Due to the features of self-oiling or lubrication, auto -adjustment, low effort to the actual adjustment, the hydraulic clutch is used in various systems.

READ MORE ON CLUTCH

Clutch Overview
Centrifugal Clutch
Hydraulic Clutch

References [External Links]:


Media Credits:

Was this post helpful?

Mechanical Engineer. Executive Editor. Designer
I'm Proud to be a Mechanical Engineer!
Die Casting: Definition, Process, Types, Defects and Remedies, Applications, Advantages, Disadvantages [With PDF]

In this article, I'll show you everything you need to know about the Die Casting Process. At the beginning we'll start with the definition, then we dive into the steps of die-casting, Types, die casting defects with the solution. Further on we'll see the applications, advantages, and disadvantages of die casting as well. Process of […]

Difference Between Drum Brakes and Disc Brakes [With PDF]

In our daily life, we see the braking effect everywhere, like bicycle, motorcycle, car, bus, train, and more. The list is quite long. So to get the breaking effect we need to have some component which produces the effect, is not it? So that particular component which generates the braking effect is called Breaking System. […]

Forming Process: Definition, Classification or Types, Advantages, Disadvantages, and Applications [PDF]

In this article, you'll going to learn the Metal Forming Process. After reading of this article you will able to find the answer of Types of Forming Processes, Advantages and Disadvantages of this process and lastly the application of Metal Forming Process. So let's get started with the Definition. Classification or Types of Forming Process […]