Patent ID: 9664208
Date: 2017-05-30
CPC Classifications: E02F,F02D,F15B,Y02T

Claim:
1. An engine control system for a construction machine including a lower driving structure, an upper swing structure mounted on the lower driving structure, an attachment mounted on the upper swing structure, a main hydraulic pump connected to an engine, a detection means for detecting pressure on an outlet side of the main hydraulic pump, a detector for detecting whether the attachment, a traveling device, and a swing, device are intended to operate a main control valve, and a controller, the engine control system comprising: determining whether pilot signal pressure, which is detected when at least one of an operation lever and a traveling pedal for respectively operating the attachment, the swing device, and the traveling device is operated, exceeds a first set pressure; and determining whether the pressure on the outlet side of the main hydraulic pump exceeds a second set pressure, wherein if the pilot signal pressure detected in the first step does not exceed the first pressure and the pressure of the main hydraulic pump detected in the second step exceeds the second pressure, engine driving is compulsorily stopped by means of a control signal from the controller.