Electric Work Vehicle Cruise Control for Quick Motor Stop
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Solution Overview
Problem
Existing electric work vehicle control systems, when in cruise mode, require significant driver effort to stop the vehicle and lack quick responsiveness to speed adjustments, as the traveling motor continues to run unless the brake pedal is pressed, and speed adjustments are not instantaneous due to the need for operation beyond the travel instruction tool's range.
Innovation Solution
A control system that includes a travel instruction tool, a sensor to detect its operation position, and a control device that manages the traveling motor's speed based on the tool's position, allowing the cruise mode to be canceled and the motor stopped without the brake when the tool is released, and automatically returning to zero speed when not in use, enabling quicker reflection of the driver's intentions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cruise mode is activated to maintain vehicle speed automatically, then the driver's operation burden is reduced, but the vehicle cannot be stopped quickly when necessary
Solution Approach 1:
The control device stores the operation position of the travel instruction tool before cruise mode activation, and uses this stored information to enable quick stopping by returning the tool to the stored position, allowing the vehicle to stop quickly without requiring the driver to press the brake pedal
2Stability of the object's composition
If the travel instruction tool operation range is limited during cruise mode, then the vehicle speed is maintained stably, but the vehicle cannot respond quickly to speed adjustments
Solution Approach 1:
The control device stores the operation position of the travel instruction tool before cruise mode activation, and when speed adjustment is needed, the tool is returned to the stored position first, then the cruise mode is canceled, enabling quick response to speed adjustments without excessive tool operation
Solution Approach 2:
The control device dynamically switches between cruise mode and normal operation mode based on the travel instruction tool's operation position, allowing the system to adapt between stable speed maintenance and quick speed adjustment responses
Data Source
AI summary
[Problem] In a control system for an electric work vehicle, when a cruise switch is turned on, a vehicle is shifted more quickly to an operation that reflects a driver's intention.[Solution] The control system includes a control device that controls a rotation speed of a traveling motor on the basis of an operation position of a travel instruction tool and a cruise switch that instructs execution of a cruise mode in which a rotation speed of the traveling motor is controlled by an ON operation so that a set vehicle speed is stored, and that traveling is maintained without an operation of the travel instruction tool. The control device executes the cruise mode when the cruise switch is turned on and a predetermined condition is satisfied, cancels the cruise mode when the cruise switch is turned on, but the predetermined condition is not satisfied, and if it is determined that there is no operation of the travel instruction tool after the cancellation of the cruise mode, the rotation speed of the traveling motor is stopped.