There is a unique bond between the energy that comes from the internal combustion inside the engine, the transmission and the wheels. That bond is the clutch. In other words for torque transmission to happen, your Volvo needs a clutch. Not all Volvo models use the same type of clutch though. Modern models use advanced clutch systems like the cone clutch and i-shift while older models use basic friction clutch systems. Read on to learn more about the different types of Volvo clutches.
The Basic Friction Clutch
It is the most common type of clutch in Volvo models. It can be operated by a cable or by hydraulics. To work, a basic friction clutch a pressure plate as well as a release bearing so as to either engage or disengage the transmission and the flywheel. Most Volvo models use simple single plate clutches with high powered engines which make it easy for drivers to engage the multi-plate clutch. As soon as the clutch pedal is pressed, the release bearing applies some pressure to diaphragm springs on the pressure plate. This then releases a clamping pressure on the clutch plate which easily disengages from the flywheel. As the car moves and gears change, the clutch is released and the release bearing is sent back from the pressure plate. The clutch plate is clamped again before it is driven by the pressure plate. This allows drive through to the transmission.
They feature multiple clutch plates as well as a good supply of oil for purposes of lubricating and cooling components. They are mostly used in high torque situations where the level of friction is high with soaring temperatures. This creates a dire need for something that cool down the temperature, which is where coolants come into the picture. It is for this reason that powertrains with more than 250lb ft of torque need wet clutch systems so as to avoid excessive wear and tear of the rest of the transmission as a result of overheating.
Unlike wet clutches, dry clutches have no oil supply. They are generally single plate. This means they are more efficient when it comes to lubrication needs. They are also more efficient generally because lubrication often leads of lack of friction between wet clutch systems as well as generating parasitic losses from the drivetrain. In other words, a pump is needed to evenly supply the lubricating oil. The small coefficient of friction in wet systems is as such, the reason for having several plates for effective and safe clutch performance.
Multi-Plate Clutch Systems With a multi-plate clutch system, plates are stacked on top of each other. This means that the amount of friction generated within the clutch can be easily amplified. The clutch can therefore cope up with high torque inputs. This explains why multi-clutch systems are mostly used in high speed Volvo models. The amount of friction required to stop the clutch from easily slipping can be fitted into the same diameter measurement as a single plate clutch mostly due to the neat stacking multi-clutch systems are known for.