Having more gears means that gears are running with little or no load for longer periods of time, creating a high frequency whining noise that is more audible.
Traditional solutions focus on mass damper technology, where the gearbox is mounted on conventional rubber mounts and a large mass damper is added to counter the high-frequency vibration.
To avoid additional mass, rubber flaps on both main springs act as cost-efficient tunable mass absorbers. A modular design uses an inserted core to achieve efficient variable precompression of the rubber spring. This results in better high-frequency isolation, leading to improved vehicle interior noise and significant weight and cost savings. A lightweight aluminum housing and a compact design enable strict packaging demands to be met.
Furthermore, the mount can be easily tuned to address specific frequencies, making it suitable for multiple applications. The essential feature of the product are the rubber flaps on both sides of the main spring. Using advanced design tools, the thickness and height of these flaps can be tuned to target multiple frequencies, resulting in better high frequency isolation and improved vehicle interior noise.
As high-frequency isolation is a requirement for electric motors, these mount features are also suitable for electric motor mounting solutions.
About Motor Mounts
Motor mounts carry the static and dynamic loads of the motor throughout its entire service life and are also an important factor for isolating low to high frequency vibrations. Downsized and turbocharged motors are state-of-the-art to reduce fuel consumption but lead to high vibration levels.
Motor and transmission mounts consist of a motor or gearbox support arm, an isolation element and a body-side connecting element. The critical element is the rubber spring that dampens vibrations, supports drive torques and isolates noise during start-up. The motor mount prevents booming noises and load-change shocks. Vibrations of the body and drive train are improved by using a hydraulic damping system. Motor mounts effectively isolate motor vibrations and dampen road excitations to ensure a comfortable driving experience.
The product portfolio ranges from conventional rubber mounts and hydro motor mounts, through electrically or pneumatically switchable motor mounts, to gearbox mounts and torque rods.