The challenges of Chassis Electrification

The electrification of an increasing number of formerly mechanically and hydraulically powered chassis systems is currently one of the major challenges faced by chassis engineers. The strong rise in the number of electrical chassis components not only adds a new dimension to driving comfort but also enables the integration of a range of indispensable safety features.

New technologies such as regenerative braking can improve the fuel economy of a vehicle significantly, and are therefore a major key to a mass implementation of electro mobility. In this context, the electrification of braking systems is one of the big challenges faced by chassis engineers. The role of pedal sensors for the electric brake system is an important one, since electric brakes don‘t have mechanical link between the driver and the brakes. Therefore, appropriate sensing systems have to be developed. The basic function of the brake pedal unit for the electric brakes is to transfer driver’s intention of applying brakes to the control module.

Functional requirements need to consider safety aspects, a fast response, a wake-up system on the pedal movement and pedal feed emulation. Several risky situations can be created by some malfunctions of the brake pedal unit, such as:

– Loss of brake
– Reduced deceleration
– Undesired increased deceleration
– Undesired sudden braking
– Undesired constant braking
– Retarded braking

Therefore, safety strategies and concepts need to be developed. For the implementation of the solutions, many aspects have to be considered like the synchronization of multiple sensors due to mechanical and electrical tolerances and the relationship between different sensing parameters.

Find out more about the role of pedal sensors for the electric brake system by downloading the presentation of Konrad Slanec, SensorDynamics AG.

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Posted on March 7, 2011, in Chassis. Bookmark the permalink. Leave a comment.

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