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Wankel Rotary Engine

Wankel Rotary Engine: UN R155 establishes vehicle cyber-security and Cyber Security Management System (CSMS) type-approval context. The page also includes a worked example and measurement sequence.

6 concrete technical facts1 worked example3 sources

Technical frame

Wankel Rotary Engine: UN R155 establishes vehicle cyber-security and Cyber Security Management System (CSMS) type-approval context. The page also includes a worked example and measurement sequence.

The technical values here expose the standard, protocol or physical relationship directly; model-specific service values are linked through the matching model/variant dossier.

The goal is not only to define the term but to let the reader calculate and interpret what the data means in a scan, scope or physical test.

Concrete technical facts

  • UN R155 establishes vehicle cyber-security and Cyber Security Management System (CSMS) type-approval context.
  • UN R156 covers software update and Software Update Management System (SUMS) requirements.
  • An OTA update has separate evidence for package identity, signature/verification, dependencies, target ECU, rollback/recovery and update status.
  • Successful package transfer does not prove that the ECU booted successfully on the new software.
  • Software version, calibration version and vehicle-configuration mismatch can cause functional loss.
  • Cybersecurity diagnosis should preserve authorized identity/log/verification chains rather than bypass security controls.

Worked example

  • Version example: if ECU application 3.4.1 requires matching calibration but calibration remains in the 3.3.x family, a valid checksum can still coexist with a compatibility rejection.

Measurement and verification sequence

  • Record current/target software and calibration IDs.
  • Check update-package signature/verification status.
  • Capture dependency and vehicle-configuration result.
  • After reboot, verify diagnostic session, DTCs and rollback state.

Fault-separation logic

  • Is a valid command present and are power/ground/network healthy?
  • Does feedback follow the command?
  • Does an independent physical measurement confirm the output?
  • Is the fault limited to a specific temperature/load/speed condition?
  • Does the result remain stable when the original condition is repeated after repair?

Technical sources

  1. Otodünyam Teknik Editoryal Sözlük R2
  2. UNECE UN Regulation No. 155 · Cyber security management system
  3. UNECE UN Regulation No. 156 · Software update management system

Continue investigating

Model-specific real technical data · Measurement references · Technical diagnostic atlas