Gear Shift Controller for Human-Powered Vehicles
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Solution Overview
Problem
Existing gear shift controllers for human-powered vehicles are not adequately tailored to the dynamic traveling states of the vehicles, leading to inefficient gear shifting.
Innovation Solution
A gear shift controller with a detection circuit and control unit that determines traveling state information, including torque, power, tilt-angle, acceleration, and motion information, to adjust the shift standby time of the transmission, allowing for more suitable gear shifting based on the vehicle's state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gear shift control is based solely on traveling speed and crank rotation information, then the control system remains simple, but the gear shifting becomes ineffective and不平滑 for varying traveling states
Solution Approach 1:
The patent applies dynamics by making the shift standby time adjustable based on detected traveling state information. The control unit dynamically modifies the standby time parameter in response to changes in torque, power, tilt angle, acceleration, or motion information, allowing the system to adapt to varying riding conditions and achieve smoother gear shifting without requiring complex hardware modifications
Solution Approach 2:
The patent changes the parameter of shift standby time based on different traveling states. By detecting parameters such as torque information, power information, tilt-angle information, acceleration information, and motion information, the control unit adjusts the standby time parameter to optimize gear shifting performance for each specific riding condition, thereby improving ease of operation while maintaining relatively simple system architecture
2Reliability
If the transmission controls gear shifting without considering comprehensive traveling state information, then the response time is fast, but the gear shifting becomes ineffective for the current traveling state
Solution Approach 1:
The patent implements feedback by having the detection unit continuously monitor traveling state information (torque, power, tilt angle, acceleration, motion) and feed this information back to the control unit. The control unit uses this feedback to adjust the shift standby time, ensuring that gear shifting occurs at the most appropriate moment for the current traveling state, thereby improving reliability while minimizing time loss through intelligent timing
Solution Approach 2:
The patent applies preliminary action by setting an appropriate shift standby time before actual gear shifting occurs. The control unit detects traveling state information and预先 determines the optimal standby time, allowing the transmission to be prepared for upcoming gear shift operations. This preliminary timing adjustment ensures that gear shifting is both effective for the current state and timely, avoiding unnecessary delays
Data Source
AI summary
A gear shift controller includes a detection circuit and a control unit. The detection circuit is configured to determine traveling state information about a traveling state of a human-powered vehicle. The control unit is configured to receive the traveling state information from the detection circuit to control a shift standby time of a transmission of the human-powered vehicle. The traveling state information includes information other than traveling speed information about a traveling speed of the human-powered vehicle and crank information about crank rotation information of the human-powered vehicle.