Clutch actuation systems for passenger cars and clutch actuation systems for LCV are installed in automobiles and comprise all components with which the power is transferred from the pedal to the clutch release bearing in order to release the clutch. The pedal travel is transferred mechanically (usually via a cable pull) or hydraulically. SACHS supplies various types of actuators and clutch actuation systems.
Find all products in the online product catalog.
The concentric slave cylinder (CSC) combines the clutch release bearing and the slave cylinder to an integrated unit. As a result, the release fork between the clutch release bearing and the slave cylinder as well as the respective bearing points are not required. Assembly takes place directly on the transmission.
This is advantageous compared to conventional clutch actuation systems for cars: Vibrations and grabs during launch are prevented as the number of mechanical components has been reduced. The driver benefits from the best possible ride comfort.
The concentric slave cylinder (CSC) should be replaced with each clutch repair in order to prevent delayed signs of wear and, consequently, further repairs.
As concentric slave cylinders are now installed as standard in approximately half of all vehicle models, SACHS automotive products also contain clutch kits with CSC.
Concentric Slave Cylinder (CSC)
The concentric slave cylinder (CSC) (1) is assembled directly on the transmission.
The diaphragm-spring clutch can be set free of clearance, i.e., the release bearing is constantly running whilst the clutch is turning. An initial load generated by the clutch actuation system for passenger cars and LCV ensures that the clutch and the release bearing thrust ring are running at the same speed. Speed differences would lead to the creation of noise and increased wear.
The release bearings are self-centering (can be radially adjusted by approx. 1.5 mm), in order to compensate for alignment tolerances between the diaphragm spring and the clutch release bearing thrust face. They centrically adjust to the diaphragm spring tongues automatically during the first clutch actuations.
CSC clutch release bearings are used when the installation space is not large enough for a conventional clutch actuation system.
Hydraulic clutch actuation system with CSC
The clutch actuation system for cars transfers the pressure of the driver’s foot on the pedal to the clutch in order to disengage it. It has to ensure absolute reliability, meet ergonomic requirements and provide a high level of comfort throughout its entire service life. The actuation system includes the hydraulic transmission path with master and slave cylinder as well as the mechanical part with the clutch release bearing and the lever.
SACHS master cylinder (left) and slave cylinder (right)
In systems equipped with a master/slave cylinder the clutch actuation system for cars and LCV is transferred hydraulically. The pedal motion is transferred to a hydraulic cylinder (1, master) located directly below the pedal. In a closed system, the cylinder generates hydraulic pressure that is absorbed by a slave cylinder (3) via a hose assembly (2).
In order to ensure ideal functionality, it is possible to bleed the clutch actuation system.
Conventional master/slave cylinder
With its high-quality clutch cables, SACHS covers the European vehicle market almost completely. Clutch cables are subject to a high level of mechanical load. The first indications of wear are increased physical effort and noises when operating the clutch, or clutch slipping and grab.
SACHS clutch cables
The clutch actuation is transferred purely mechanically via clutch cables. The pedal motion is transferred to a steel cable (1), the release fork (2) and the clutch release bearing (3) so that the clutch is operated. The highlighted areas show wearing zones in the clutch environment.
Mechanical clutch actuation system with cable control
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When you visit any web site, it may store or retrieve information on your browser, mostly in the form of cookies. This information might be about you, your preferences, your device or used to make the site work as you expect it to. The information does not usually identify you directly, but it can give you a more personalized web experience. You can choose not to allow some types of cookies. Click on the different category headings to find out more and change our default settings. However, you should know that blocking some types of cookies may impact your experience on the site and the services we are able to offer.
These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms. You can set your browser to block or alert you about these cookies, but some parts of the site will not then work. These cookies do not store any personally identifiable information.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
