| 摘要 |
A self-propelled concrete finishing trowel has an electronically controlled engine droop control to prevent stalling of the trowel's engine during overload conditions. The engine droop control includes an engine speed sensor that measures operating speed of the engine and a controller that adjusts operation of a hydrostatic drive system of the trowel based on feedback received from the engine speed sensor to reduce the power draw on the engine during overload conditions. The hydrostatic drive system is powered by the engine to rotate one or more finishing blade arrangements, and under normal operating conditions, is driven by a controller to rotate the blade arrangements at an operator desired speed, such as input by a foot pedal. During overloading conditions, the controller overrides the operator input to drive the hydrostatic drive system to match an operating speed supported by the overloaded engine to reduce the power draw on the engine and thereby prevent engine stalling. |
