The Bosch Vehicle Motion Control Systems division delivers solutions that enhance safety, performance, comfort, and driving pleasure.

Hardware-software decoupled control enables vehicle motion control across six degrees of freedom.

Vehicle Motion Control enables innovative, cross-domain functionalities and simplified vehicle architectures.

The “Electronic Comfort Braking” function ensures smooth, bump-free braking.

Bosch offers drive-by-wire solutions and has expanded its braking portfolio to include drive-by-wire brake actuators.

Reinheim, Germany—Driving the transformation of mobility, reshaping the vehicle motion control market with integrated chassis solutions to enhance driving safety, performance, and convenience—this is the mission and goal of Bosch's Vehicle Motion Control Systems division. Established in 2024, the division consolidates expertise and experience across multiple domains including braking, steering, vehicle motion software, driver assistance systems, and vehicle dynamics sensors. Beyond brake and steering actuators, the division develops solutions meeting the requirements of software-defined vehicles and drive-by-wire technology, alongside cross-actuator vehicle control software (such as Vehicle Motion Control Systems) and supporting services. Its portfolio encompasses both hardware and embedded software, as well as standalone software solutions. This enables the division to support automakers in realizing innovative, cross-domain functionalities, simplified vehicle architectures, and new interior designs. At the 2024 Bosch Technology Days, the division showcased its latest solutions:

Bosch Vehicle Motion Control System Revolutionizes the Driving Experience

Vehicle Motion Intelligent Control System

The Vehicle Motion Control System, as a cross-domain software solution, controls the vehicle's six degrees of freedom and coordinates braking, steering, powertrain, and suspension systems. Hardware-independent software functions optimize vehicle dynamics, handling, and efficiency. Additionally, the Vehicle Motion Control System facilitates management of complex new vehicle architectures. Its system integration software within the central vehicle computer controls various actuators across different vehicle domains. Simultaneously, it enhances driving safety and convenience by delivering data-driven services.

Bosch Intelligent Vehicle Motion Control System

Bosch Intelligent Vehicle Motion Control System

Bosch Intelligent Vehicle Motion Control System

Electronic Comfort Braking

This software feature prevents the uncomfortable jerking sensation that occurs during vehicle braking, making frequent stops in congested traffic smoother. It alleviates passenger discomfort caused by repeated starts and stops and helps prevent motion sickness. Additionally, the Electronic Comfort Braking software significantly reduces braking noise. By optimizing control of the electric motor and braking system in electric vehicles, this feature ensures smooth deceleration without requiring hydraulic brake intervention. Even when hydraulic brakes are engaged, the transition from electric to hydraulic braking occurs imperceptibly to passengers.

Bosch Electronic Comfort Braking

Data-driven services

The Vehicle Motion Intelligent Control System incorporates cloud-based and data-driven service combinations, including the “Road Perception” service. This service utilizes sensor data from the vehicle to generate information about road conditions and friction coefficients. This sensor data is combined in the cloud with information from other vehicles and meteorological service data to provide drivers with early warnings of road hazards such as slippery surfaces, ice, potholes, and speed bumps. Furthermore, this data-driven, cloud-based service can automatically adjust the vehicle's motion posture during cornering and optimize the driving strategies of safety and assistance systems, enhancing both safety and comfort.

Bosch Digital Services

Wireless Control Technology

Steer-by-wire technology utilizes electrical signals for transmission, eliminating the mechanical linkage between the steering wheel, brake pedal, and respective actuators of the steering and braking systems. This enhances vehicle comfort and integration flexibility while opening new avenues for functional innovation—such as enabling smarter system interventions during critical driving situations to mitigate or prevent safety incidents. Additionally, drive-by-wire technology enables innovative human-machine interfaces and interior designs, reduces variables between left-hand and right-hand drive vehicles, and improves crash safety. To ensure safety, the system incorporates redundant designs in actuators, power supply, and communication. Combined with Bosch's Intelligent Vehicle Motion Control System, it delivers a safer, more comfortable, and sustainable driving experience.

Bosch Drive-by-Wire Technology

Cable-operated braking

Bosch's new braking system consists of the Brake-by-Wire Actuator (BWA) and ESP®, featuring safety redundancy while eliminating the mechanical connection between the brake pedal and the braking system. Through redundant signal lines, the braking command is transmitted from the electronic brake pedal to both the Brake-by-Wire Actuator and ESP®. The interaction between these two components ensures full braking performance is guaranteed under all circumstances. In the event of a failure, the BWA and ESP® can generate the required brake pressure at all four wheel brakes. Furthermore, eliminating the mechanical connection between the brake pedal and the brake system opens up entirely new possibilities for human-machine interfaces and interior design.

Bosch Brake-by-Wire

Wired Brake Actuator BWA

The new BWA Brake-by-Wire Actuator leverages proven hydraulic technology to translate the driver's braking intent into actual action. Lightweight and requiring no firewall mounting, it offers flexible vehicle integration, simplifying design while enhancing crash safety by preventing driver leg injuries. The brake pedal connects to the BWA via wiring harnesses, delivering low-energy, rapid-build, and precise braking pressure to all four wheel brakes. It is particularly suited for executing braking demands from driver assistance functions and Automatic Emergency Braking (AEB), enabling a smooth transition from electric to hydraulic braking. As a secondary brake actuator, ESP® can control individual wheels when necessary to ensure vehicle stability.

Micro-motion control brake pedal

The introduction of brake-by-wire technology and the elimination of the mechanical connection between the brake pedal and the braking system open up new possibilities for human-machine interfaces and interior design. The traditional brake pedal is replaced by a redundant micro-switch brake pedal, which detects braking requests via sensors and transmits them as electrical signals to the braking system. Innovative interior design is not the only advantage stemming from its simple and flexible integration; Bosch's micro-switch brake pedal also contributes to making the driving experience safer, more relaxed, and more personalized.

Steer-by-wire

In an online steering system, the mechanical connection between the steering column and the steering gear is eliminated. The new system integrates a steering wheel actuator and a steering rack actuator. By utilizing precise sensor technology, the steering wheel actuator detects the driver's steering input and transmits it digitally to the steering rack actuator, which then steers the wheels accordingly. Additionally, the steering wheel actuator provides the driver with steering feedback, including information about driving conditions and road surfaces. Specific signals from ruts or potholes can be partially or fully filtered, attenuated, or even amplified according to the vehicle manufacturer's specifications. Furthermore, the steering wheel actuator can adjust the steering wheel's position based on the driver's personal preferences or, in highly automated vehicles, retract the steering wheel completely for a limited period.

Bosch Drive-by-Wire Steering System

This article is reprinted from the Bosch Chinese official website. Source: Bosch
Original link:Algorithms in Their Prime: Bosch Vehicle Motion Control System Revolutionizes the Driving Experience

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