Overview
ISO 10455:1992 specifies dimensional and connection requirements for dry ignition coils using a rotating high‑voltage distributor for road vehicles. It applies to ignition systems for spark‑ignited internal combustion engines and defines preferred hole patterns, mounting‑bracket arrangements, and electrical connector options to ensure interchangeability and fit between coil suppliers and vehicle manufacturers.
Key Topics
- Scope and shape
- The general external shape of coils is left to the manufacturer's discretion; the standard focuses on mounting and connector interfaces.
- Mounting and fixing arrangements
- Definitions for three coil types: two fixing holes, four fixing/positioning holes, and mounting brackets.
- Mounting brackets may use open or closed slots, circular and/or slotted holes, and can have slots aligned or perpendicular.
- Dimensional requirements
- Detailed dimensions and preferred hole patterns are provided in figures and tables within the standard to guide mechanical design and assembly.
- High‑voltage (HV) connections
- HV connector options are specified as socket type A (ISO 3553‑1) or plug type C (ISO 3553‑2), to be agreed between car maker and supplier.
- Low‑voltage (LV) connections
- Maximum of two permanent connections per polarity.
- LV termination styles include flat quick‑connect terminations (per ISO 8092‑1 / ISO 8092‑2) and threaded terminations; threaded sizing assigns M5 to negative and M6 to positive polarity.
- Marking
- Polarities must be permanently marked “+” and “-” with characters at least 2 mm high.
Applications
ISO 10455 is used by:
- Automotive OEMs and tier‑1 suppliers to define compatible ignition coil interfaces for engines with rotating distributors.
- Ignition coil manufacturers for designing coils that meet vehicle mounting and connector standards, enabling interchangeability and reducing engineering rework.
- Aftermarket parts producers and distributors to ensure replacement coils fit original mounting and connector systems.
- Test and inspection laboratories verifying mechanical and connection compliance against standard dimensions.
Practical benefits include streamlined design, reduced fitment failures, improved supplier interoperability, and clearer procurement specifications for ignition systems in road vehicles.
Related Standards
- ISO 3553‑1:1987 – Road vehicles - High‑tension connections for ignition coils and distributors - Socket type.
- ISO 3553‑2:1987 – Road vehicles - High‑tension connections - Plug type.
- ISO 8092‑1:1989 – Road vehicles - Flat quick‑connect terminations - Part 1: Tabs.
- ISO 8092‑2:1988 – Road vehicles - Flat quick‑connect terminations - Part 2: Tests and performance.
Keywords: ISO 10455:1992, dry ignition coils, rotating high‑voltage distributor, ignition coils standard, road vehicles, ignition system dimensions, M5 M6, quick‑connect terminations.