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Abstract
Electronic braking systems (EBS) are based on the principle of supplementing traditional mechanical and pneumatic braking systems with electronic control units to enhance vehicle safety. European Union and international legislation has established detailed regulations to ensure the reliability, functional safety, and compliance with vehicle type approval of these systems. This article discusses the basic regulatory requirements, technical specifications, and practical effects of electronic braking systems.
1. Introduction
Increasing vehicle speeds, vehicle weights, and road traffic density have increased the need for faster, more precise, and more reliable solutions in braking systems. Electronic braking systems optimize braking performance by working in conjunction with subsystems such as ABS, EBS, ESC, and similar systems. Parallel to these developments, regulations have also expanded beyond classic braking requirements to cover electronic control and software safety.
2. Definition and Scope of Electronic Braking Systems
The electronic braking system is based on the principle of detecting the braking demand via sensors, processing it in the electronic control unit (ECU), and transmitting it to the brake actuators via electronic signals. These systems consist of:
• Wheel speed sensors,
• Brake pressure sensors,
• Electronic control unit (ECU),
• Actuators and valve modules,
• Communication infrastructure (CAN, ISO standards).
3. Legal Basis of Regulations
Requirements for electronic braking systems are based on the following legislation in particular:
• EU Regulation No. 167/2013 on the Type Approval of Agricultural and Forestry Vehicles
• EU Regulation No. 2015/68 on Braking Systems
• UNECE Regulations R13 and R13-H
• ISO 26262 Functional Safety Standard (supporting framework)
4. Basic Regulatory Requirements for Electronic Brake Systems
4.1 Functional Safety
Electronic brake systems must be designed to maintain minimum braking capability even in the event of a single failure. Regulations require fault detection, transition to a safe mode (fail-safe or fail-operational), and driver notification.
4.2 Redundancy and Fault Management
To counter faults that may occur in sensors, ECUs, or communication lines:
• Redundant signal paths,
• Mechanical or pneumatic fallback braking function,
• Continuous self-diagnostic mechanisms are required.
4.3 Performance Requirements
The electronic braking system must fully meet the criteria defined in the regulations:
• Maximum stopping distance,
• Minimum deceleration values,
• Response times, even under electronic control. The electronic system being engaged must not cause any delay or reduction in braking performance.
4.4 Driver Information and Warning Systems
Failures occurring in electronic braking systems must be communicated to the driver in a clear and understandable manner:
• Visually (warning light),
• Audibly. Regulations require warnings to be provided using standardized symbols.
4.5 Software and Data Security
Regulations require the verification and traceability of the software used in the braking system. Software updates must be performed under control, and the system must be protected against unauthorized interference.
5. Type Approval and Testing Processes
In the type approval process for electronic braking systems;
• Functional tests,
• Fault simulations,
• Electromagnetic compatibility (EMC) tests,
• Durability and environmental tests are performed. The tests aim to prove that electronic control does not adversely affect braking safety.
6. Sectoral Impacts and Compliance Process
Regulations on electronic braking systems have:
• Directed manufacturers towards more advanced software and hardware infrastructures,
• Increased testing and validation costs,
• Significantly improved vehicle safety and user comfort.
From the perspective of agricultural vehicles and commercial vehicles, electronic braking systems provide critical advantages, particularly in trailer and semi-trailer stability.
7. Conclusion
Regulatory requirements for electronic braking systems are a fundamental element of modern vehicle safety. Addressing hardware, software, and system integration collectively, these regulations aim to maximize braking safety. With the proliferation of electronic control, compliance with regulations has become both a technical and strategic necessity.
References (Informative)
• Regulation (EU) No 167/2013 of the European Parliament and of the Council
• Commission Regulation (EU) No 2015/68
• UNECE Regulation No. 13 and 13-H
• ISO 26262: Road Vehicles – Functional Safety
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