Studies on the Power Transmission System of Power Tiller (I)

The Characteristics of Governing of the Spark Ignition Engine

Abstract

The load required on the power tiller are affected upon the engine and the reduction gear. Therefore, the relation between the load and the engine has been studied. At first, the characte-ristics of governing of the air cooled and the water cooled engine have been tested. These characteristics have been considered by the automatic control engineering and the experiments have revealed the following.
The characteristics of governing of the engines have been affected upon
(1) the moment of inertia round the crank shaft J,
(2) the internal resistance f or k₁ and time constant T₁ of engine,
(3) the sensitivity k₂ and time constant T₂ of carburetor,
(4) the sensitivity of governor k₃.
And so the static error ε increased with the load. The speed response for the load fluctuation has been affected upon ω_n, and the load fluctuation of the air cooled engine severer than the water cooled engine.