All About Multi-Plate Clutch in Cars
The multi-plate clutch system is the set of gears used to transfer engine torque between the engine shaft and transmission shaft. It is similar to a normal clutch system but uses additional plates to transfer a high amount of torque.
In this guide, we will provide you with complete details about the usage, working and construction of the multi-plate clutch system.
Multi-Plate Clutch System
The multi-plate clutch system uses three or more plates to transfer torque. Their high surface area provides smooth and convenient transmission. Therefore, it is often used with petrol and diesel engines producing high torque. The following paragraphs will elaborate you with complete details about the multi-plate clutch system.
Construction
The construction of a multi-plate clutch is similar to a single plate clutch. The additional plates in multi-plate are segmented into two different categories arranged alternatively. One of these plate sets is connected to a pressure plate hub and another one grooves with a flywheel. Along with these plate sets, other important components of the multi-plate clutch system are:
- Thrust springs
- Pressure plate
- Clutch plate
- Flywheel
- Clutch pedal
- Diaphragm spring
Working
In a multi-plate clutch system, clutch and pressure plates are sandwiched between the flywheel and diaphragm spring. The flywheel is attached to the engine crankshaft and diaphragm spring to the clutch pedal. When the clutch pedal is released, the diaphragm exerts pressure over the pressure and clutch plate. This pressure enables clutch plates to come in contact with the flywheel and receive torque from the engine crankshaft. When clutch plates start receiving torque from the flywheel it rotates the clutch shaft which results in rotating the wheels.
When the clutch pedal is pressed, it disengages the clutch plate and flywheel. Thus, the flywheel starts rotating independently of the clutch plate and no torque is transmitted.
Types of Multi-Plate Clutch
There are different types of multi-plate clutch systems used in modern vehicles. Here we have listed some of the most commonly used multi-clutch plate systems.
Spring Multi-Plate
The spring multi-plate is the simplest and oldest multi-plate clutch system used in cars. In this type, the clutch plates are enclosed inside a metal covering. This metal covering is attached with a flywheel on one end and a clutch pedal on the other. A spring is used to release and exert pressure on clutch plates enclosed in metal covering.
The diaphragm multi-plate clutch system is similar to the spring system. However, it uses a diagram disc instead of a spring to maintain pressure.
Hydraulic or Automatic
Hydraulic multi-plate clutch is the modern type of clutch system often used in AWD and 4WD cars. In this system, the clutch pedal is replaced by a high-pressure fluid chamber connected with the accelerator. Thus, the pressure is maintained by the accelerator and the clutch pedal is not required.
Wet Multi-Plates
The wet multi-plate clutch system is supplied with oil lubricants to reduce the friction and temperature inside plates. Wet plates are smaller in size and therefore located inside the engine casing.
Dry Multi-Plates
Dry plates are not supplied with oil and are located inside the engine casing. The noise level is more contrary to wet plates and increases if left unmaintained.
Advantages and Disadvantages of Multi-Plate Clutch
The compact gearbox, smaller size, lesser noise and higher efficiency makes it suitable for sports and supercars. It is often paired with high torque-producing engines. Following are the multi-plate clutch advantages and disadvantages.
Advantages
- The usage of more than one plate supports transmitting higher torque that makes multi-plate systems efficient.
- The diameter of the clutch plate in multi-plate is smaller, which makes it lightweight and suitable for modern cars.
- Multi-plate clutch in automatic transmission align with car computer and automate drivetrain functions automated.
Disadvantages
- The cost and maintenance of multi-plate clutches are high which makes it unsuitable for affordable cars.
- Multi-plate systems require proper coolant or cooling systems to reduce heat generated from friction.
This was all about multi-plate clutch systems in cars. The majority of modern AWD and 4WD drivetrain systems are dependent upon this multi-plate clutch system. These drivetrain systems are known for enhancing the drive experience. If you are interested in experiencing this smooth driving experience, browse through these used cars for sale in the UAE and upgrade your vehicle.
Stay tuned to UAE’s top auto blog for more information on multi-plate clutch systems.