How Does a Car Measure Speed? Mechanical vs Electrical Speedometer | Car Speed Sensor Explained

Описание: Ever wondered how your car measures speed and how the speedometer works? In this video, CarVaidya explains two main systems used in cars to measure speed — Mechanical Speed Measurement and Electrical Speed Measurement.
This video is perfect for anyone searching for how car speed is calculated, how vehicle speed sensor works, how digital speedometer works, or difference between mechanical and electrical speedometer.

🔧 MECHANICAL SPEED MEASUREMENT (OLD SYSTEM)

Before digital displays and modern ECUs, cars used a mechanical speedometer.
Here’s how the mechanical type measures speed:

A speedometer cable is connected to the transmission or gearbox.

As your car moves, the rotating drive shaft spins this cable.

This rotation turns a magnet inside the speedometer.

The magnetic force moves the speedometer needle, showing your speed in real time.

This system is simple, durable, and does not require electronics.

If you search for “mechanical speedometer working”, this is exactly how it works.

⚡ ELECTRICAL SPEED MEASUREMENT (MODERN SYSTEM)

Modern cars use an electrical or electronic speedometer, which is more accurate and reliable. These cars depend on a Vehicle Speed Sensor (VSS).

Here’s how the electrical system measures speed:

A speed sensor near the gearbox or wheel hub reads how fast the wheels rotate.

This sensor sends signals to the Engine Control Unit (ECU).

The ECU processes the data and displays your speed on the digital speedometer.

This technology is used in systems like ABS, traction control, cruise control, and navigation.

People searching “how digital speedometer works”, “vehicle speed sensor explained”, or “ECU speed calculation” will get a full explanation in this video.

📌 WHY SPEED MEASUREMENT IS IMPORTANT?

A properly working speed measurement system is important for:
✔ Correct speed display
✔ Safe driving
✔ Better mileage
✔ Accurate ABS and traction control functioning
✔ Smooth engine performance

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