Engine Control Apparatus Jump Detection and Rotation Suppression
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Solution Overview
Problem
Conventional engine control apparatuses for straddle-type vehicles fail to effectively prevent excessive engine rotation during jumps, as they assume a load is always present, leading to inadequate control when no load is applied, such as during jumping.
Innovation Solution
An engine control apparatus that includes an acceleration detecting means to identify gravity acceleration, a jump judging means to determine if the vehicle has jumped, and a rotation number suppression mechanism to lower engine rotation when a jump is detected, along with a turnover judging mechanism to differentiate between jumps and turnovers, and an adjusting mechanism to vary suspension attenuation force based on these judgments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional engine control apparatus executes control to prevent excessive engine rotation assuming load is always present, then engine protection is provided during normal running, but control is insufficient during jumps when no load is added to the engine
Solution Approach 1:
The control system dynamically adapts its behavior based on detected vehicle state. The ECU judges whether the vehicle is jumping based on acceleration sensor data, and switches between normal rotation suppression control and jump-specific rotation suppression control. This dynamic adaptation allows the system to maintain effectiveness across different operating conditions.
Solution Approach 2:
The system changes control parameters based on vehicle state. During jumps, the ECU sets a lower threshold value for permissible engine rotation compared to normal running. This parameter change enables more aggressive rotation suppression during jumps when no load is present, preventing excessive rotation that would occur under conventional control.
2Difficulty of detecting and measuring
If acceleration-based jump detection is used, then jump detection capability is provided, but wrong judgment between jumps and turnovers may occur due to similar acceleration patterns
Solution Approach 1:
The system uses feedback from multiple sensors to verify jump conditions. In addition to acceleration sensor data, the ECU monitors throttle opening degree and engine rotation characteristics. This multi-parameter feedback mechanism allows the system to distinguish between jumps and turnovers by analyzing the combined pattern of all sensor inputs rather than relying on acceleration alone.
Solution Approach 2:
The ECU acts as an intermediary that processes and integrates information from multiple sources (acceleration sensor, throttle position sensor, engine rotation sensor) before making the jump judgment. This intermediary processing layer combines multiple data streams to create a more accurate determination of vehicle state, reducing misjudgment between similar events like jumps and turnovers.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively suppresses engine rotation during jumps, improves accuracy in judging vehicle states, and enhances the riding experience by adjusting suspension forces, preventing errors in judging between jumps and turnovers.
Implementation Method 1
an acceleration detecting means for detecting an acceleration component of gravity acceleration in a predetermined direction of a vehicle
Data Source
AI summary
An engine control apparatus that effectively suppresses a rise in rotation number of an engine in a jump of a vehicle. An engine control apparatus includes an acceleration detecting device for detecting an acceleration component of gravity acceleration in a perpendicular direction of the vehicle body based on a signal inputted from an acceleration sensor, and a control circuit for judging whether the vehicle has jumped or not based on the acceleration component to be detected. The control circuit suppresses a rise in rotation number of the engine when the vehicle is judged to have jumped.