Walk-behind Snow Remover Mode Selector Control
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Solution Overview
Problem
Existing walk-behind self-propelled snow removing machines require skilled operators to adjust engine throttle and travel speed manually, leading to inefficiencies and varying snow removal quality due to load changes, and lack user-friendly and efficient operation modes for different skill levels.
Innovation Solution
A walk-behind self-propelled snow removing machine with a control unit that includes a mode selector switch allowing operators to choose from multiple operation modes (manual, power, and automatic) based on skill level, automatically adjusting engine speed and travel speed to optimize snow removal efficiency and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual control mode is used for snow removing operation, then operator skill allows for precise control, but operation efficiency decreases and finishing quality varies due to frequent throttle adjustments
Solution Approach 1:
The control unit automatically adjusts engine revolving speed and travel speed parameters based on detected load changes, eliminating the need for manual throttle adjustments and maintaining optimal operating parameters across varying snow conditions
Solution Approach 2:
The system performs self-control by automatically detecting load variations and adjusting its own operating parameters (engine speed and travel speed) without external intervention, improving both efficiency and ease of operation
2Productivity
If automatic control is implemented to maintain constant travel speed, then operation efficiency improves, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The control unit serves multiple functions: it manages engine revolving speed, controls travel speed, monitors load conditions, and interfaces with existing clutch mechanisms, consolidating control capabilities into a single multi-functional device
Solution Approach 2:
The control unit continuously detects actual travel speed and load conditions, compares them with target values, and automatically adjusts engine speed accordingly, creating a closed-loop control system that maintains efficiency without excessive complexity
3Ease of operation
If multiple operation modes are provided for different skill levels, then user-friendliness increases, but operating section complexity increases
Solution Approach 1:
The operating section allows dynamic selection between manual and automatic modes, adapting the system's control characteristics to match the operator's skill level and preferences, with the mode selector switch enabling flexible transition between operational paradigms
Data Source
AI summary
A walk-behind self-propelled working machine has a machine body, a working unit mounted on the machine body to perform a working operation, an engine mounted on the machine body to drive the working unit, and a traveling unit mounted on the machine body and drivable to cause the machine body to travel. A control unit controls operations of the working unit and the traveling unit. An operating section is operatable by a human operator to provide signals to the control unit to control operations of the working unit and the traveling unit. A mode selector switch is mounted on the operating section for operation by the human operator to select one working operation mode from among plural alternative working operation modes that are set in advance in the control unit on the basis of a combination of a travel speed of the machine body, a revolving speed of the engine, and an opening of a throttle valve associated with the engine.