Drive-by-Wire – The Direct Line to Throttle, Brake, and Steering

The New Logic of Vehicle Control

Drive-by-Wire marks a revolution in vehicle architecture: critical driving functions are no longer controlled mechanically but via electrical signals – direct, precise, and in real time. No more traditional steering gear, no brake boosters, no mechanical throttle cables – instead: control units, sensors, and actuators. Full control remains – but on a digital level.

How Does NX NextMotion Work?

With NX NextMotion, Arnold NextG offers a fully electronic, safety-certified control system for:

• Steering (Steer-by-Wire)
  Redundant actuators controlled by ECU logic. No mechanical linkage required. Safety ensured via 2oo3 validation, real-time monitoring, and fallback levels.
• Braking (Brake-by-Wire)
  Electric signals sent directly to electrohydraulic or fully electric brake actuators. TÜV-certified, ASIL-D validated, and designed with multi-channel redundancy for fail-operational safety.
• Throttle (Throttle-by-Wire)
  The accelerator? A sensor. The engine controller? ASIL-compliant with diagnostic paths and watchdogs.

Control is redefined: Whether steering wheel, joystick, or assistive devices – Drive-by-Wire enables barrier-free, intuitive interfaces and improves the Human-Machine Interaction (HMI) experience.

What Does “Direct Link” Really Mean?

Literally: NX connects control input and actuators without detours – using high-speed automotive bus systems. Fast, deterministic, and designed for safety-critical communication.

Why Is This the Future?

• Design freedom – no constraints from columns or hydraulic lines
• Safety through redundancy – fault isolation and automatic fallback ECUs
• OTA-capable – secure software updates deployed remotely
• Autonomy-ready – the foundation for autonomous and remote driving
• Human-centered – adaptable control systems and force feedback for realistic driving sensation

NX NextMotion is not a prototype. It's field-proven, TÜV-approved, and ready for seamless integration – unlike conventional systems that still rely on mechanical redundancy.