Patent ID: 8336522

Claim:
An engine revolution speed control system for a construction machine, comprising: a device that can be grasped in a hand of a user to manipulate the construction equipment during operation of the construction equipment: an input unit that sets an engine revolution speed by the user, outputs a setting process as a set signal, and determines whether or not an engine is driven at a set engine revolution speed, wherein the input unit includes a setting switch for inputting information on a process of setting the engine revolution speed, an ON/OFF switch for inputting information on whether or not the engine is driven at the set engine revolution speed, the setting switch and the ON/OFF switch being disposed on the device such that the user can manipulate the setting switch and ON/OFF switch without removing the hand from the device; a signal generating means for outputting information on the input setting process as a set signal, and outputting information whether or not the engine is driven at the engine revolution speed, as a driving signal; a control unit that receives the set signal and stores the set engine revolution speed, receives the set signal and the ON/OFF signal to output an output signal corresponding to the received set signal and the ON/OFF signal, and controls operation of the engine at the set engine revolution speed in accordance with the ON/OFF signal; and a display that receives the output signal to visually output the setting process or whether or not the engine is setting the engine revolution speed.