Tongyu Automotive Technology

Tongyu iEHB is a new-generation One-box brake-by-wire solution that integrates EHB, EPB and ESC into a single unit, delivering high-quality base braking, brake-by-wire, electric parking and stability control, and serving as a chassis domain controller for full wire-controlled chassis management. It features high integration, low cost, full hydraulic decoupling, better energy recovery and stronger mechanical redundant braking.

Configuration One-box (integrates EHB+EPB+ESC); integrated redundant dual-control EPB; full hydraulic decoupling; high-performance vehicle stability control; vehicle tonnage coverage 0.5-4.5 t; suitable for fuel/electric/hybrid passenger vehicles, commercial vehicles and unmanned vehicles.

• Passenger vehicles
• Commercial vehicles
• Unmanned vehicles
• Fuel vehicles
• Electric vehicles
• Hybrid vehicles

Tongyu EHB is the mainstream brake-by-wire solution, adopting an integrated design that combines the pedal feel simulator, displacement sensor, ECU, motor, transmission and master cylinder assemblies into a compact, lightweight and easy-to-install unit. It eliminates vacuum dependence, enables high-performance active braking and greatly improves braking energy recovery, making it a key actuator for intelligent driving. The EHB-EPBi integrates the electric parking system into the EHB controller, removing the P-lock and enabling a fully redundant L3-and-above braking solution.

Configuration Two-box (decoupled); integrates pedal feel simulator/displacement sensor/ECU/motor/transmission/master cylinder; decoupled scheme achieves 100% braking energy recovery; dry/wet types optional; integrated redundant EPB (EHB-EPBi); vehicle tonnage coverage 0.5-7.5 t; suitable for fuel/electric/hybrid passenger vehicles, commercial vehicles and unmanned vehicles.

• Passenger vehicles
• Commercial vehicles
• Unmanned vehicles
• Fuel vehicles
• Electric vehicles
• Hybrid vehicles

Tongyu EHB-HD is a hydraulic decoupled electro-hydraulic brake system (a new-generation Two-box brake-by-wire scheme). The pedal feel simulation chamber is directly connected to the input push rod to simulate pedal feel, while the pressure-building chamber is driven by a motor and transmission that deliver brake fluid to the ABS/ESC or wheel cylinders. It delivers more comfortable pedal feel, full hydraulic decoupling, better braking energy recovery, compact and lightweight design, stronger high-performance active braking and mechanical redundant braking, and provides a fail-safe backup with no force transmission loss.

Configuration Two-box (hydraulic decoupling); pedal feel chamber directly connected to input push rod; pressure-building unit driven by motor + transmission; optional fail-safe backup (backup input force fully transmitted to vehicle braking); covers A0-C class passenger vehicles; suitable for passenger vehicles, light commercial vehicles, unmanned vehicles and ~0.5 t AGV.

• Passenger vehicles
• Light commercial vehicles
• Unmanned vehicles
• AGV

Tongyu Electric Parking Brake System (EPB) comprises three series: the MOC-EPB caliper-integrated electric parking system with a high-reliability software/hardware platform, rear-wheel anti-lock backup during dynamic deceleration, and auto hold/release/high-temperature re-clamp/slope re-clamp functions; the BC-EPB backup controller that takes over electrically after main controller failure, meeting regulatory EPB backup requirements and replacing the P-lock; and the CP-EPB cable-type electric parking system supporting single-cable schemes and value-added functions such as assisted start, with low assembly process requirements.

Forms caliper-integrated (MOC-EPB) / backup controller (BC-EPB) / cable-type (CP-EPB); supports dynamic deceleration rear-wheel anti-lock, auto hold, high-temperature re-clamp, slope re-clamp; BC-EPB supports single-channel EPB takeover and replaces P-lock; covers A0-C class passenger vehicles, ~0.5 t AGV, commercial vehicles and large passenger vehicles.

• Passenger vehicles
• Commercial vehicles
• AGV

Tongyu ABS features a high-reliability software/hardware platform architecture that delivers vehicle speed calculation, anti-lock braking and electronic brake-force distribution. With broad applicability, it fits passenger vehicles and light to medium commercial vehicles, and can integrate the EPBi scheme with EHB to realize a low-cost advanced driver-assistance solution.

Functions vehicle speed calculation / anti-lock braking (ABS) / electronic brake-force distribution (EBD); can integrate inertial sensors; can integrate EPBi with EHB; short development cycle; vehicle tonnage coverage 0.5-7.5 t; suitable for fuel/electric/hybrid passenger vehicles, commercial vehicles and unmanned vehicles.

• Passenger vehicles
• Commercial vehicles
• Unmanned vehicles
• Fuel vehicles
• Electric vehicles
• Hybrid vehicles

Tongyu ESC features a high-reliability software/hardware platform architecture that delivers vehicle speed calculation, anti-lock braking, electronic brake-force distribution, traction control, lateral stability control and active-safety advanced functions. With broad applicability, it fits passenger vehicles and light to medium commercial vehicles, can integrate the EPBi scheme with EHB for a high-performance advanced driver-assistance solution, and supports fail-operational main redundant braking in cooperation with EHB.

Functions ABS/EBD/traction control (TCS)/dynamic vehicle stability control/hill-start assist/auto hold/integrated electric parking brake control; supports fail-operational main redundant braking with EHB; can integrate EPBi; vehicle tonnage coverage 0.5-7.5 t; suitable for fuel/electric/hybrid passenger vehicles, commercial vehicles and unmanned vehicles.

• Passenger vehicles
• Commercial vehicles
• Unmanned vehicles
• Fuel vehicles
• Electric vehicles
• Hybrid vehicles

Tongyu EMB is driven by electric actuators that completely eliminate traditional hydraulics, requiring no hydraulic-system maintenance, and integrates more closely with autonomous-driving systems by fully decoupling the driver's braking intent from brake-force execution applied directly at the wheel ends, delivering more precise vehicle control. It represents the mainstream future direction of brake-by-wire development.

Drive electric motor direct drive (no hydraulics); fully decoupled braking; higher response speed and control precision; zero drag and higher energy recovery efficiency; low maintenance cost; high redundancy for intelligent driving; suitable for passenger vehicles, commercial vehicles and driverless vehicles.

• Passenger vehicles
• Commercial vehicles
• Driverless vehicles

Tongyu SBW steer-by-wire system adopts a mechanically decoupled scheme, with fully redundant hand-feel actuator (HFA) and front-wheel steering actuator (FSA), using a private CAN bus to ensure safe steering operation. The HFA uses a belt-driven reduction structure with high-quality NVH performance and accurate road-feel reproduction; the FSA is newly developed on the RBNA architecture with a linear position sensor (LPS) that perfectly replaces the angle sensor (AOS) and removes many associated parts, delivering performance comparable to traditional R-EPS at lower cost.

Architecture mechanical decoupling; dual redundancy (HFA hand-feel actuator + FSA front-wheel steering actuator); private CAN communication; variable steering ratio; active steering function; FSA adopts LPS linear position sensor replacing AOS; covers A-B-C class passenger vehicles, commercial vehicles and unmanned vehicles.

• Passenger vehicles
• Commercial vehicles
• Unmanned vehicles

Tongyu R-EPS uses a belt-pulley combined with ball-screw transmission (officially a belt-type electric power steering system), covering passenger and commercial vehicle applications with maximum rack force not below 16 kN, delivering excellent steering feel and NVH performance and meeting functional-safety ASIL D requirements. Two versions are offered: redundant R-EPS supports hands-free scenarios across all speed ranges and fault tolerance (Fail-Operational), covering L3 and above intelligent driving; non-redundant R-EPS targets large rack-force applications below L3.

Transmission belt-pulley + ball-screw; maximum rack force >=16 kN; functional safety ASIL D; versions redundant / non-redundant; redundant version supports full-speed hands-free and Fail-Operational; suitable for passenger vehicles, commercial vehicles, driverless vehicles (redundant version).

• Passenger vehicles
• Commercial vehicles
• Driverless vehicles

Tongyu Rear-Wheel Steering System (RWS) adopts a belt-driven combined with trapezoidal-screw structure, covering passenger and commercial vehicle applications with maximum rack force not below 16 kN, giving the vehicle a smaller turning radius at low speed and more stable steering at high speed, and supporting crab-walk mode and other features, meeting ASIL D functional-safety requirements.

Transmission belt + trapezoidal screw; maximum rack force >=16 kN; functional safety ASIL D; smaller turning radius at low speed / more stable steering at high speed; supports crab-walk mode; in fault state tires auto-return to center with static self-lock after centering; suitable for passenger vehicles, commercial vehicles.

• Passenger vehicles
• Commercial vehicles

Tongyu iASU (Integrated Air Supply Unit) is a closed-type air pump, compact and lightweight for easy vehicle packaging; compared with open systems it brings lower system power consumption, with main operating noise below 56 dB and open-system replenishment below 60 dB. Integrating CDC and stiffness-valve control, it delivers a better ride experience, provides Z-axis (vertical) support for the intelligent chassis and autonomous driving, and is the core air-supply component of the brake-by-wire suspension system.

Type closed air pump (integrated air supply unit); high integration, compact, lightweight; high pumping efficiency, low energy consumption; noise main operating <56 dB, open replenishment <60 dB; integrates height control and CDC control; suitable for passenger vehicles (brake-by-wire suspension system).

• Passenger vehicles
• Brake-by-wire suspension system

Tongyu EAC (electric air compressor / air compressor) adopts two-stage compression for high pumping efficiency and low specific power; the coaxial fan provides good cooling. Compact and lightweight for easy vehicle packaging, with low noise for a better ride experience, it serves as the air-source component for brake-by-wire suspension and commercial-vehicle pneumatic brake circuits.

Type two-stage compression electric air compressor; high pumping efficiency, low specific power; coaxial fan cooling, low exhaust temperature; compact lightweight, low vibration and noise, high reliability; suitable for electric buses, trucks, special-purpose vehicles.

• Electric buses
• Trucks
• Special-purpose vehicles

Tongyu CDCU (Chassis Domain Controller) acts as the control center (the cerebellum) of the wire-controlled chassis, coordinating the actions of braking, drive, steering and suspension actuators to maximize the performance and safety boundaries of the chassis system; adopting a software/hardware decoupled architecture, it better supports the fusion and iterative update speed of chassis functions.

Functions coordinated control of braking/drive/steering/suspension four systems; cross-system redundant backup; software/hardware decoupled chassis control architecture (favorable for vehicle platformization); intelligent perception and fusion of chassis systems; suitable for intelligent electric vehicles.

• Intelligent electric vehicles
• Passenger vehicles