HYDRAULIC SYSTEM IN FORKLIFT WITH APPLICATION OF EXTRA PUMP AND CLUTCH TO IMPROVE FUEL EFFICIENCY

摘要

The present invention relates to a hydraulic system in a forklift, and the hydraulic system comprises: a lever manipulation sensor for generating a level location signal by sensing a manipulation of a user lever; a controller for generating a control signal corresponding to the lever manipulation based on the level location signal generated in the lever manipulation sensor; a constant driving pump for supplying hydraulic power to a hydraulic power device which requires the constant hydraulic power after the power generated from an engine is transmitted; a power extracting part for extracting the power generated from the engine; a conditional driving pump for receiving the power extracted from power extracting part, and supplying the same to a main valve side; a clutch part for connecting or separating the conditional driving pump to or from the power extracting part by the control of a clutch valve part; and a clutch control valve part for controlling a drive of the clutch part based on the generated control signal. Therefore, when a user does not manipulate the lever, an unnecessary hydraulic power loss can be prevented, and, further, mileage performance can be improved.;COPYRIGHT KIPO 2015