Motorcycle Fuel Heating Control via Tilt Detection
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Solution Overview
Problem
In motorcycles, fuel insufficiency in the fuel pipes leads to overheating when the fuel heating device operates without sufficient fuel, resulting in reduced fuel supply and poor temperature control, deteriorating engine starting characteristics, especially in low temperature environments.
Innovation Solution
A motorcycle system that includes a fuel heating device controlled by a controller, which detects the tilt of the motorcycle and the fuel level to prevent overheating by prohibiting the operation of the fuel heating device when insufficient fuel is present, ensuring that the fuel is only heated when sufficient fuel is available, and allowing a predetermined amount of fuel to be injected to expel air from the fuel pipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fuel heating device operates to heat the fuel in the fuel pipe, then the starting characteristics of the engine are improved, but the fuel may be overheated when insufficient fuel is present, causing vapor generation and reduced fuel supply
Solution Approach 1:
The tilt detector detects the tilt state of the motorcycle before the fuel heating device operates. The controller uses this advance information to determine whether sufficient fuel is present in the fuel pipe before initiating heating, preventing overheating before it occurs. This preliminary detection resolves the contradiction by enabling conditional heating only when safe.
Solution Approach 2:
The controller continuously monitors the tilt detector's output and adjusts the operation of the fuel heating device accordingly. When the tilt detector indicates a state where insufficient fuel may be present, the controller prohibits heating operation. This feedback mechanism ensures that heating only occurs when sufficient fuel is confirmed, resolving the contradiction between improving starting characteristics and preventing fuel overheating.
2Use of energy by stationary object
If the fuel heating device operates without sufficient fuel in the fuel pipe, then energy is consumed by the heater, but the fuel temperature rises above required level, deteriorating temperature controllability
Solution Approach 1:
The controller checks the tilt detector's output before activating the fuel heating device to ensure sufficient fuel is present. This preliminary verification prevents the heater from operating under conditions that would lead to poor temperature controllability, ensuring energy is only consumed when temperature control can be effectively maintained.
Solution Approach 2:
The controller monitors tilt detector feedback and prohibits heater operation when the tilt state indicates insufficient fuel. This feedback control prevents energy waste and maintains temperature controllability by ensuring the heater only operates when sufficient fuel is present to absorb heat and maintain proper temperature control.
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
Prevents fuel overheating and improves engine starting characteristics by ensuring that the fuel is only heated when sufficient fuel is present, maintaining optimal temperature and preventing air from being mixed with the fuel.
Implementation Method 1
a fuel heating device that heats the fuel in the fuel pipe
Implementation Method 2
a tilt detector that detects the tilt of the main body
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A CPU (Central Processing Unit) of an ECU (Electronic Control Unit) drives a fuel heating device when a fuel heating condition is satisfied and the result of a fuel heating prohibition determination process indicates permission of heating. On the other hand, the CPU does not drive the fuel heating device when the fuel heating condition is not satisfied or when the result of the fuel heating prohibition determination process indicates prohibition of heating. In the fuel heating prohibition determination process, the CPU detects a tilted state of a motorcycle, and prohibits or permits heating of fuel in a fuel pipe by the fuel heating device based on its detection result.