AhmedElectrical Engineer

Bothersome vibrations and noises that the transmission and engine generate can hardly be heard in modern vehicles thanks to vibration-optimized concepts with innovative and safe powertrain mounts.

Secure anchorage - pleasant damping

LEMFÖRDER rubber bearings for the driveline securely anchor the engine and transmission and increase the ride comfort for the passengers. The metal-to-rubber components in the driveline include engine mounts, transmission mounts, and flexible disks.

They form the damping connection of the engine and transmission with the chassis and secure the units in all driving situations. Furthermore, the bearings ensure that the driver and passengers are protected against bothersome vibrations and noises.

Nowadays, the LEMFÖRDER rubber-bonded metal mounts are also used for the harmonization of the engine tone.

What he does at ZF:

How can traffic accidents be avoided? When a crash becomes unavoidable, how can the highest level of safety be ensured for the vehicle occupants and the damage kept to a minimum? Ahmed's department Active Safety considers these questions when working on a new product, be it lights that automatically dim (automatic high/low beam) or software that generates hundreds of thousands of kilometers of virtual road scenarios to test new products. "Every day is different," says Ahmed, "and I love that, because it invigorates my mind." As a performance feature engineer, error correction and problem solving are his passion.

"The best thing about my job is that the decisions we make today influence the automotive safety of tomorrow."

Depending on the vehicle model, up to 15 rubber-to-metal components may be installed in a passenger car. The vulcanized connection between the metal and rubber transfers pressure and shear forces and simultaneously insulates oscillations, vibrations, and structure-borne noise.

That is the reason why rubber-to-metal components have a decisive influence on driving characteristics and driving safety. The LEMFÖRDER composite parts are therefore designed in an innovative manner and are geared towards a particularly long service life.

How he came to ZF:

When at college, Ahmed's big dream was to work as an engineer on a development team in the automotive industry. After studying electrical engineering at Michigan State University, he made a conscious decision to go and work for ZF in Detroit: "The company is a powerhouse of innovation. I love being able to play a part in the changes we drive here."

Conventional, hydraulic, or switchable bearing?

Conventional, hydraulic, and switchable engine mounts

Conventional bearings are intelligently designed rubber-metal or rubber-plastic constructions that provide mechanical damping. Hydraulic bearings, also referred to as hydro bearings additionally work with an oil damping. Within the rubber element, the liquid ensures a resistance to flow that can soften jolts and vibrations. Hydraulic bearings are used wherever an elastic mounting with frequency-dependent damping is desired – on engine mounts, link mounts, or axle housing bearings for instance. Switchable hydraulic bearings or active bearings can also adjust the damping characteristics to the respective operating condition of the unit via gear changes.

Task and function of the various bearings in the driveline

Engine mounts, transmission mounts, and flexible disks perform important tasks in the vehicle.

Engine mounts

LEMFÖRDER engine mounts

As a connection between the engine and the body, engine mounts absorb the static engine load. They limit the engine movement, thus ensuring a damping of the vibration and structure-borne noise transfer into the body.

Transmission mounts

LEMFÖRDER transmission mounts

Transmission mounts connect the transmission with the body. In doing so, they ensure a damping of the vibration and structure-borne noise transfer into the body.

Flexible disk

LEMFÖRDER flexible disks

The flexible disk is located between the transmission/ cardan shaft and the rear differential unit. Its function is diverse: It compensates for angle misalignments and reduces the risk of stuttering. In addition, the flexible disk cushions the torque peaks, thus protecting the driveline and increasing driving comfort.

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