Work Machine Display System with Delayed Engine Stop Control
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Solution Overview
Problem
The existing technique for delaying engine stop in work machines does not include a configuration to suspend control during the delayed stop process, preventing the engine from returning to normal operation.
Innovation Solution
A display system for work machines that includes a display unit showing the surroundings and a function for delayed engine stop control, allowing the operator to suspend the delayed stop control by operating the rotary switch to the ignition position, with an additional condition of the lock lever being in the locked position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If delayed stop control is implemented to prevent engine shutdown during high temperature conditions, then engine reliability is improved, but the system lacks flexibility to suspend control when needed
Solution Approach 1:
The patent implements dynamic control by allowing the delayed stop control to be suspended through a predetermined operation (e.g., operating the ignition switch). This enables the control system to adapt between automatic delayed shutdown and manual suspension modes, resolving the contradiction between maintaining reliability through automatic control and providing adaptability through operator intervention.
2Reliability
If automatic delayed stop control is performed without suspension capability, then engine protection is ensured, but operator control flexibility is reduced
Solution Approach 1:
The system provides feedback to the operator through display units that show the current state of delayed stop control. This allows the operator to understand when the control is active and when suspension is possible, enabling informed manual intervention while maintaining automatic protection when needed.
3Temperature
If the engine stop is delayed automatically, then exhaust system temperature management is improved, but unintended operation risk increases
Solution Approach 1:
The patent introduces an intermediary mechanism (predetermined operation requirement) between the automatic delayed stop control and the actual engine shutdown. This intermediary allows the operator to intervene and suspend the control if conditions change, reducing the risk of unintended operation while maintaining temperature management benefits.
Data Source
AI summary
A display system for a work machine includes: a display unit that performs a display of an image of surroundings of the work machine and of a function pertaining to delayed stop control of an engine of the work machine.