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A Study on Design for Noise Reduction of hEMB

Hyundai Mobis-Chihoon Jo, Jaeseung Cheon, Jongsung Kim, Yongsik Kwon
Published 2015-09-27 by SAE International in United States
EMB (Electro-Mechanical Brake) which converts electrical motor power to brake clamping force at each wheel is a system that has been investigated and developed by various automotive part suppliers through the years. In particular, as the number of electrically powered vehicles, such as hybrid electric vehicles, electric vehicles and fuel cell electric vehicles, has expanded, the EMB has received increased interest due to its fast response that is much suited for effective cooperative control with regenerative braking. However, issues such as cost competitiveness, reliability and regulations need to be solved for commercialization [1-2].A new concept, the hybrid Electro-Mechanical Brake (hEMB) is characterized by a dual piston structure linked by hydraulics inside of the caliper. It is possible to reduce the required motor power and increase the level of emergency back-up braking through the amplification effect of the dual piston mechanism [3]. The hEMB is composed of the caliper, dual pistons, spindle, gear actuator and motor. Here, the gear actuator acts to increase the torque generated by the motor. Although the motor is the source of…
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