Working machinery

JP7874997B2Active Publication Date: 2026-06-17HITACHI CONSTRUCTION MACHINERY CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
HITACHI CONSTRUCTION MACHINERY CO LTD
Filing Date
2022-03-30
Publication Date
2026-06-17

AI Technical Summary

Technical Problem

Existing systems for reversing cooling fans to remove dust from heat exchangers in working machines do not adequately consider the surrounding conditions, potentially releasing exhaust gas containing dust and debris that can harm workers, buildings, and vehicles.

Method used

A working machine equipped with a controller that uses GPS and orientation sensors to determine if the vehicle is in a prohibited area or facing a protected area before allowing the cooling fan to reverse, preventing harmful exhaust discharge.

Benefits of technology

Effectively controls the reverse rotation of the cooling fan based on the machine's surroundings, preventing dust and debris from being sprayed towards workers, buildings, and vehicles, while maintaining heat exchanger cleanliness.

✦ Generated by Eureka AI based on patent content.

Smart Images

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Patent Text Reader

Abstract

To provide a work machine that controls the inverse rotation of a cooling fan, considering a surrounding state of the work machine.SOLUTION: A work machine (10) has a vehicle body, a heat exchanger unit (18), a cooling fan (10), a controller (110) controlling the rotation direction of the cooling fan, a forbidden area information storing device for storing forbidden area information specifying a position where the inverse rotation of the cooling fan is forbidden, and a GNSS sensor (17). The controller determines whether the vehicle body is inside or outside the forbidden area, and when it is determined that the vehicle position is outside the forbidden area, outputs a reverse rotation signal of the cooling fan, and when it is determined that the vehicle is inside the forbidden area, forbids output of the reverse rotation signal of the cooling fan.SELECTED DRAWING: Figure 1
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