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📘 How does a windshield wiper clear rain?

Follow the motor, gears, linkage, springs, blade, washer fluid, and park circuit.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

Start the course →

What you’ll learn

The wipe path
DC motor
Worm gear
Linkage
Park position
Intermittent timing
Pressure
Washer fluid
Protection
The complete sweep

Questions this course answers

What converts the wiper motor's rotation into back-and-forth arm motion?

A crank and connecting rods convert rotary output into arm oscillation.

Why does a wiper motor use reduction gears?

Gearing slows the output and multiplies torque for the arms and blades.

What does the park switch do?

The park circuit keeps power applied until the arms reach the designated rest position.

What is the purpose of washer fluid?

Fluid helps the blade remove contamination without dragging dry grit.

Why can ice overload a wiper system?

Frozen blades or packed snow greatly increase mechanical load and current demand.

Grounded in trusted sources

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Every Wunder lesson is built from real, reputable sources — never invented.

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