The Slow Down Device for Engine Driven Type Welder

Abstract

The inherent defect for the conventional mechanically controlled slow down devices is the frequent breakdown of the timer components caused by the dirts in the air or oil. To eliminate the above defect, new electronically controlled devices are developed. Moreover, how to protect the control circuit against vibration and high temperature due to engine is shown.
As rotary solenoid and semiconductor components were employed to adjust the governor of engine, the devices could have many advantages such as higher reliability, longer maintenance-free life, smaller size and lighter weight.
Measurement of noise level and gasoline consumption showed that when compared with the case without slow down device, the slow down device could decrease noise level by ten phons and gasoline consumption by more than half.