Engine Start Controller with Multi-Stage Output Adjustment
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Solution Overview
Problem
Existing engine controllers require riders to maintain a low throttle opening degree to continue ignition timing delay, limiting acceleration performance and forcing mental strain, as they cannot utilize this feature when opening the throttle for a fast start.
Innovation Solution
An engine controller with a start determinator, elapsed timer, and start controller that adjusts engine output in multiple stages based on predefined conditions, allowing for delayed ignition timing without rider strain, including modes that change engine output size and duration to optimize acceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the prior-art start detector detects the start running state based on throttle opening degree and gear position, then the ignition timing delay control can be activated to improve tire gripping performance, but the control is cancelled when the throttle opening degree exceeds 1/2 or gear position exceeds third gear, preventing full utilization of acceleration performance
Solution Approach 1:
The patent applies preliminary action by detecting the start running state in advance based on throttle opening degree and gear position, then activating ignition timing delay control before the vehicle actually starts moving. This ensures the control is already in effect when the vehicle begins acceleration, allowing the rider to open the throttle fully without the control being cancelled, thus achieving both reliable tire gripping and full acceleration performance
Solution Approach 2:
The patent implements dynamics by making the ignition timing delay control adaptive to different driving conditions. The control continues based on detected start running state rather than being rigidly limited by throttle opening degree thresholds, allowing the system to dynamically adjust and maintain the delay control throughout the acceleration phase regardless of throttle position changes
2Productivity
If the rider opens the throttle large at start to achieve fast start dash, then the acceleration performance can be improved, but the prior-art engine controller cannot maintain ignition timing delay control, forcing the rider to keep throttle opening degree to 1/2 or less
Solution Approach 1:
The patent applies self-service by making the engine controller automatically detect and maintain the start running state without requiring continuous rider input or throttle restriction. The controller monitors throttle opening degree and gear position, detects when the vehicle is in a start running state, and maintains ignition timing delay control throughout the acceleration phase, allowing the rider to simply open the throttle fully without needing to manage control conditions
Solution Approach 2:
The patent implements parameter changes by transitioning from a rigid throttle-based control condition to a dynamic state-based control condition. The system changes the control parameter from fixed throttle opening degree limits to adaptive detection of start running state, allowing the ignition timing delay to be maintained throughout the acceleration phase regardless of throttle position, thus simplifying rider operation while maintaining acceleration performance
Data Source
AI summary
There are provided a start determinator for determining whether or not the vehicle has started, an elapsed timer for measuring elapsed time since start of the vehicle determined by the start determinator; and a start controller for adjusting an engine output by changing the output in multiple stages until the elapsed time measured by the elapsed timer reaches a control time determined in advance if the start of the vehicle is determined by the start determinator.