Work machine
The work machine uses sensors to set idling states based on prime mover speed and hydraulic oil temperature, addressing delays and malfunctions in existing systems by ensuring accurate transitions to idling states.
WO2026140577A1PCT designated stage Publication Date: 2026-07-02KUBOTA CORP
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- KUBOTA CORP
- Filing Date
- 2025-11-13
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Existing work machines transition to an idling state based on pressure switch signals, which can be delayed or malfunction due to variations in hydraulic oil pressure influenced by temperature and prime mover speed, leading to inappropriate idling states.
Method used
A work machine equipped with a pressure sensor and temperature sensor that determine threshold values based on prime mover speed and hydraulic oil temperature to accurately control the transition to an idling state.
Benefits of technology
Ensures the work machine remains in an appropriate idling state by adjusting the prime mover speed based on real-time hydraulic oil pressure and temperature conditions, preventing delays or malfunctions.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure JP2025039854_02072026_PF_FP_ABST
Abstract
The present invention properly brings a work machine into an idling state. A work machine (1) is provided with a prime mover (9, 69), a hydraulic pump (P1, P2) that is driven by the prime mover and discharges hydraulic oil, hydraulic actuators (C1-C5, ML, MR, MT) operated with the hydraulic oil, a pressure sensor (43, 49) for detecting the pressure of the hydraulic oil, a temperature sensor (44) for detecting the temperature of the hydraulic oil, and a control device (7) for determining a first threshold value in accordance with the rotation speed of the prime mover and the temperature of the hydraulic oil and, when the pressure of the hydraulic oil detected by the pressure sensor becomes equal to or lower than the first threshold value, executing idling control by which the prime mover is rotated at a prescribed idling rotation speed.
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