Engine Control Apparatus Using Flat and Pulse Power Modes
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Solution Overview
Problem
Internal combustion engines face challenges in startability at low temperatures and battery deterioration due to excessive voltage drops, which existing control apparatuses exacerbate with increased complexity and reduced power supply from batteries with reduced capacity or charge.
Innovation Solution
A control apparatus that selects between a flat mode and a pulse mode for electric power output to the motor, allowing for continuous or varying power delivery based on battery state, preventing deterioration and ensuring engine startability even when required power exceeds continuous rated output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple circuits are provided to change motor torque characteristics, then engine startability is improved, but device complexity increases
Solution Approach 1:
The patent applies dynamics by making the magnetic flux quantity adjustable through multiple circuits with different turn ratios. The switching mechanism allows the system to dynamically change the motor's torque characteristics based on operating conditions, enabling the single motor to adapt its performance without requiring multiple separate motors or complex mechanical configurations.
2Reliability
If continuous current discharge is provided to maintain motor power, then engine startability is maintained, but battery deterioration accelerates due to excessive voltage drop
Solution Approach 1:
The patent applies periodic action by switching between multiple circuits with different turn ratios in a cyclic or intermittent manner. This allows the motor to receive pulsed or varied current discharge rather than continuous high current, reducing the overall voltage drop across the battery while still maintaining sufficient average power for engine starting. The periodic switching between circuits helps preserve battery capacity and reduce deterioration.
3Power
If high power is output continuously from the battery, then motor performance is maintained, but battery voltage drops excessively
Solution Approach 1:
The patent uses dynamics by providing multiple circuits with different turn ratios that allow the system to adjust the motor's power output characteristics. By switching between circuits, the system can optimize the balance between power delivery and battery voltage maintenance, selecting appropriate circuit configurations based on real-time power requirements and battery state.
Solution Approach 2:
The patent applies periodic action through intermittent switching between multiple circuits, allowing the motor to receive power in a varied pattern rather than continuous high-power discharge. This periodic power delivery reduces cumulative voltage drop and energy loss while maintaining sufficient average power for motor operation.
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
The control apparatus effectively starts the internal combustion engine while preventing battery deterioration by adjusting power output modes according to battery conditions, ensuring reliable engine starting and minimizing voltage drops.
Implementation Method 1
a motor driven by electric power supplied by an electric storage device
Data Source
AI summary
A control apparatus for an internal combustion engine that is startable by a motor driven by electric power supplied by an electric storage device, includes: a starting mode selection device for selecting either a first mode or a second mode as starting mode of the internal combustion engine; a control device for setting an output mode during outputting the electric power to the motor from the electric storage device, according to a result selected by the starting mode selection device, wherein the control device is adapted to set a flat mode, corresponding to the first mode, in which a predetermined electric power is continuously output and a pulse mode, corresponding to the second mode, in which electric power that varies with amplitude greater than a predetermined amplitude is output.