Functional Safety Assessment of a Generic Accelerator Control System with Electronic Throttle Control in Hybrid Electric Vehicles with a Gasoline Internal Combustion Engine

This report describes the research effort to assess the functional safety of accelerator control systems with electronic faults, such as errant electronic throttle control signals, following an industry process standard. This study focuses specifically on errant signals in hybrid electric vehicles (HEVs) that combine an electric powertrain subsystem with a gasoline internal combustion engine. Three common HEV architectures are considered, the series HEV, parallel HEV, and series-parallel HEV. This study follows the concept phase process in the ISO 26262 standard and applies a hazard and operability study, functional failure modes and effects analysis, and systems theoretic process analysis methods. In total, this study derives 8 vehicle-level safety goals and 260 safety requirements (an output of the ISO 26262 and STPA processes). This study uses the results of the analysis to identify potential opportunities to improve the risk assessment approach in the ISO 26262 standard.

• Record URL:
  https://rosap.ntl.bts.gov/view/dot/42570
• Corporate Authors:

  John A. Volpe National Transportation Systems Center

  55 Broadway
  Cambridge, MA  United States  02142

  National Highway Traffic Safety Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Becker, Christopher
  • Nasser, Ahmad
  • Attioui, Fouad
• Publication Date: 2019-8

Language

• English

Media Info

• Media Type: Web
• Features: Appendices; Figures; References; Tables;
• Pagination: 465p

Subject/Index Terms

• TRT Terms: Accelerators (Devices); Control systems; Electric vehicles; Electronic control; Evaluation and assessment; Failure analysis; Gasoline engines; Hazard analysis; Hybrid vehicles; Internal combustion engines; Risk assessment; Vehicle safety
• Identifier Terms: ISO 26262
• Subject Areas: Energy; Highways; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 01722570
• Record Type: Publication
• Report/Paper Numbers: DOT HS 812 657, DOT-VNTSC-NHTSA-16-05
• Contract Numbers: DTNH22-13-V-00114/; DTNH22-15-V-00010; 51HS7BA100/
• Files: HSL, NTL, TRIS, ATRI, USDOT
• Created Date: Nov 15 2019 1:45PM