Engine controlling apparatus for a wheeled type construction machine

Claim 1

An engine controlling apparatus for a wheeled construction machine adapted to control an engine in such a manner as to generate a torque in accordance with a predetermined torque performance with reference to an extent of actuation of an acceleration pedal and a rotational speed of the engine, characterized in that said apparatus comprises, torque performance setting means for setting first and second torque performances conformable to a time of working and a time of moving of the wheeled type construction machine as a torque performance, discriminating means including first detecting means for detecting that hydraulic pressure in a hydraulic circuit for driving a working section of said construction machine is lower than a preset one, second detecting means for detecting that an extent of actuation of an acceleration pedal is more than said preset one, third detecting means for detecting that means for commanding forward movement and rearward movement of the construction machine commands forward movement of the latter and a logical circuit adapted to take a logical sum of detected outputs of said first, second, and third detecting means, said discriminating means for discriminating on the basis of the output of the logical circuit whether the wheeled type construction machine is kept in a working state or in a moving state, and means for controlling the engine in accordance with said first torque performance when it is discriminated by the discriminating means that the construction machine is kept in a working state and controlling the engine in accordance with said second torque performance when it is discriminated by the discriminating means that the construction machine is kept in a moving state.