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Properties

• High media resistance and temperature resistance
• Very good compression set behavior
• Low hysteresis/switching hysteresis
• Low displacement force, even when pressurized
• Low tolerance and directional dependency of the displacement force
• Enables good lubrication, low wear and low friction
• High mechanical load capacity (pressure level 4.5 MPa)

Thanks to our development expertise, we at BRUSS have been involved in the development of innovative ideas in the automotive industry for decades. In 1991, we introduced and continuously developed a design for composite pistons for injection molding technology, which offers logistical advantages for ordering, storage and final assembly.

As an expert in ILSP® (Integrated Lip Seal Piston), the composite pistons in automatic transmissions, BRUSS has always set standards with its clutch and gearshift pistons in terms of the shortest shifting processes and optimum driving comfort - with innovative product and material developments from concept to product testing to large-scale production.

Designs:

• Clutch pistons
• Balancer piston
• Gearshift pistons
• Servo pistons
• Variator pistons for special applications in CVT transmissions
• Brake pistons

Areas of application:

• Torque converter transmission
• Dual clutch transmission (direct shift transmission)
• CVT transmission
• Separating clutch

Requirement/stress:

• Chemical attack by ATF oil under temperature
• Mechanical stress on the elastomer, the bond and the stiffening part due to pressure
• Deformation of the overall component
• Durability of the stiffener
• Abrasion resistance of the spring system and the coupling system