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Development of an Auto Throttle System for High-Pressure Washer Engines

Article of Honda R&D Technical Review Vol.23 No.1

Summary

An Auto Throttle system for residential high-pressure washer (HPW) engines has been developed. During periods of non-loaded use, engine speed is reduced from 3850 rpm to 2500 rpm.
A residential high-pressure washer has two modes, loaded (the operator is using the spray wand) and unloaded (the operator is not using the spray wand). Compared to the base model, in an unloaded condition, the Auto Throttle control system achieves a noise level reduction of 9 dB(A). The fuel economy is increased by 43%, overall carbon dioxide emissions are reduced, and engine and pump life are enhanced. User fatigue is reduced through a reduction of initial spray wand reaction force.

Reference

(1) Acoustics - Test code for the measurement of airborne noise emitted by power lawn mowers, lawn tractors, lawn and garden tractors, professional mowers, and lawn and garden tractors with mowing attachments. ISO 11094:1991(E). Geneva, Switzerland: ISO, 1991.

Author (organization or company)

Tyler RICKETTS(HONDA R&D AMERICAS, INC.)、Andrew BEJCEK(HONDA R&D AMERICAS, INC.)、Nathaniel LENFERT(HONDA R&D AMERICAS, INC.)

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