Patent ID: 7543447
Filing Date: 2009-06-09
Classification: B60W,E02F,F02D,F04B,F16H

Abstract:
1. A control system for a traveling working vehicle comprising: an engine; a fuel injector for controlling a revolution speed of said engine; traveling means including a torque converter for traveling, which is driven by said engine; a variable displacement hydraulic pump driven by said engine; and working actuators driven by a hydraulic fluid delivered from said hydraulic pump, wherein said control system comprises; pump torque control means for controlling an absorption torque of said hydraulic pump to be kept not exceeding a preset maximum absorption torque (Tm); input means for commanding a target revolution speed (Np) of said engine; state determining means for determining an operating state of said traveling working vehicle; modification control means for modifying both a pump base torque (Tb) to obtain the maximum absorption torque (Tm) of said hydraulic pump and a target revolution speed (Np) of said engine depending on the determination result of said state determining means; wherein said state determining means includes first determining means for determining a load state of said engine, and said modification control means performs modification to reduce each of the pump base torque (Tb) to obtain the maximum absorption torque (Tm) of said hydraulic pump and the target revolution speed (Np) of said engine when said first determining means determines said engine as being in an overload state.