ISO 9619:1992

Overview

ISO 9619:1992 specifies a standardized test method for windscreen wiping systems fitted to passenger cars. It defines how to verify wiping performance (static and aerodynamic tests) and verify functioning (frequency, stall and low‑temperature tests). The standard describes required test equipment, environmental conditions, test fluids/mixtures and the method to quantify the wiped area. Results are intended to assess visibility-related performance of wipers and washers for road‑vehicle safety and design validation.

Key topics and requirements

• Scope and applicability
  • Applies to passenger‑car windscreen wiping systems; rear‑window testing is covered by ISO 6255.
  • Tests can be omitted for vehicle types that do not differ in windscreen shape, size, surface/aerodynamic characteristics or wiping‑related system features.
• Test types
  • Static test - verifies wiped area on a stationary fixture representative of vehicle installation.
  • Aerodynamic test - performed in a wind tunnel or on a test track; equivalent results expected. Not required for vehicles with maximum speed < 60 km/h.
  • Function tests - frequency test (wiper cycle rate), stall test (wiper under load) and low‑temperature test (operation after cold soak at −18 °C ± 3 °C).
• Environmental and electrical conditions
  • Ambient test temperature range: 5 °C to 40 °C (with specific provisions for low‑temperature testing).
  • Electrical input: battery fully charged; terminal voltage not more than 20% above nominal rating when measuring frequency.
• Test materials & measurement
  • Test mixture (Annex A) and test fluid (Annex B) are specified to produce a reproducible deposit and to help detect unwiped areas (e.g., water, salts, NaCMC and dust).
  • Application methods include spray‑gun deposition (Annex C).
  • Wiped area determination by tracing the windscreen outline and wiped region and calculating percentage of specified area cleared (Annex D).

Practical applications and users

• Vehicle manufacturers validating windshield wiper/washer system performance during design and production verification.
• Automotive suppliers of wiper blades, wiper motors, linkage and washer systems for product development and quality control.
• Independent testing laboratories and certification bodies assessing compliance or comparing performance across models.
• Regulatory and safety organizations concerned with driver visibility and vehicle type approvals.

Related standards

• ISO 3468 (defrosting), ISO 3469 (washing), ISO 3470 (demisting) - complementary windscreen climate/visibility tests.
• ISO 5897, ISO 5898, ISO 6255 - testing for rear‑window demisting, defrosting and wiping.
• ISO 3833 - vehicle terminology and definitions referenced by ISO 9619.

Keywords: ISO 9619:1992, windscreen wiping systems, wiper test method, wiper performance, aerodynamic test, static test, frequency test, stall test, low temperature test, automotive testing.