ENGINE SPEED CONTROL DEVICE FOR HYDRAULICALLY DRIVEN VEHICLE

摘要

An engine rotation speed control device for a hydraulically driven vehicle, having a hydraulic pump driven by an engine, a hydraulic motor for travel driven by pressurized oil from the hydraulic pump, an operation member for outputting a travel command corresponding to an operation amount, a control device for controlling, based on the travel command outputted corresponding to the operation amount of the operation member, the flow of pressurized oil from the hydraulic pump to the hydraulic motor or the flow rate of pressurized oil discharged from the hydraulic pump, a target rotation speed output device for outputting a target rotation speedof the engine based on a command, a rotation speed control device for controlling the engine rotation speed to the target rotation speed, a vehicle speed detection device for detecting the speed of the vehicle, and a vehicle speed calculation device for calculating a target vehicle speed corresponding to the operation amount of the operation member. The rotation speed control device has a correction device for correcting a target rotation speed based on the vehicle speed detected by the vehicle speed detection device and the target vehicle speed calculated by the vehicle speed calculation device.