A rotational speed testing device for small displacement engines

By employing a speed testing device consisting of a drive sprocket, chain, driven sprocket reduction mechanism, and encoder in a small-displacement engine, the problems of insufficient sensor accuracy and stability were solved, achieving accurate measurement of engine speed and improved stability.

CN224328144UActive Publication Date: 2026-06-05JINYUN KAYO MOTOR MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JINYUN KAYO MOTOR MACHINERY
Filing Date
2025-04-27
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing methods for measuring the engine speed of small-displacement engines suffer from issues such as high sensor accuracy requirements and insufficient speed stability, resulting in inadequate measurement accuracy.

Method used

A speed testing device is adopted, which includes a test bench, clamping unit, speed measuring unit and main control console. The speed reduction mechanism is composed of driving sprocket, chain and driven sprocket. Combined with encoder and magnetic powder brake, stable measurement of engine speed is achieved, and the data is processed by PLC to improve measurement accuracy.

Benefits of technology

It enables accurate measurement of engine speed, generates speed test curves, improves measurement accuracy and stability, and supports speed measurement under simulated vehicle conditions.

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Abstract

A kind of rotational speed testing device for small displacement engine, including test bench, clamping unit, speed measuring unit, main control station, the main control station includes PLC and the touch control screen connected with PLC, the PLC connects clamping unit, speed measuring unit, the speed measuring unit includes chain, driven sprocket, rotating shaft, transmission frame, magnetic powder brake and encoder, the engine is drivenly connected with driving sprocket, the driving sprocket, chain, driven sprocket are sequentially drivenly connected, the number of teeth of driven sprocket is greater than the gear of driving sprocket, the driving sprocket, chain, driven sprocket constitute speed reduction mechanism, the rotating shaft is fixedly connected with the center of driven sprocket, the encoder is fixedly installed on transmission frame, the encoder is adapted rotating shaft outer end for the rotational speed measurement of rotating shaft.
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